CN115945027B

CN115945027B - Adsorption self-adaptive adjusting method and system for adsorption tower

Info

Publication number: CN115945027B
Application number: CN202211624893.8A
Authority: CN
Inventors: 朱杰
Original assignee: Wujiang Jianchun Petrochemical Machinery Co ltd
Current assignee: Wujiang Jianchun Petrochemical Machinery Co ltd
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2024-02-27
Anticipated expiration: 2042-12-16
Also published as: CN115945027A

Abstract

The embodiment of the specification provides an adsorption self-adaptive adjusting system of an adsorption tower, which comprises at least two adsorption towers, a connecting pipeline, a control valve and a controller; each adsorption tower comprises an air inlet and an air outlet, and the air inlet is connected with an air inlet pipeline of the adsorption tower; the air outlet is connected with an air outlet pipeline of the adsorption tower; the air inlet and the air outlet are honeycomb-shaped; the connecting pipeline comprises a first connecting pipeline and a second connecting pipeline, and the first connecting pipeline is used for connecting air inlet pipelines of the two adsorption towers; the second connecting pipeline is used for connecting the air outlet pipelines of the two adsorption towers; the control valve is arranged in the connecting pipeline and is used for adjusting the gas pressure and/or the flushing flow rate in each adsorption tower; the controller is used for: determining a target opening of a control valve based on gas-related data in each adsorption tower, wherein the gas-related data includes gas pressure data and gas flow rate data; the opening of the control valve is adjusted based on the target opening.

Description

Adsorption self-adaptive adjusting method and system for adsorption tower

Technical Field

The specification relates to the technical field of adsorption tower regulation, in particular to an adsorption self-adaptive regulation method and system for an adsorption tower.

Background

In industrial production, the adsorption tower plays an important role in separating, filtering, purifying and the like of gas, particularly, the pollution to the atmosphere and the environment caused by dust, particulate matters, harmful gas and the like contained in waste gas generated in industrial production is not quite a little, and the adjustment of the working parameters (such as pressure, gas flow, flow rate and the like) of the adsorption tower is very important.

In actual production, the adsorption tower needs to comprehensively consider the influence of multiple factors such as pressure, temperature, gas conditions and the like of treatment (such as adsorption and desorption) of each link of the adsorption process in the production process, so that the adsorption tower can be reasonably adjusted. However, the gas types, components, impurities and other gases have large differences, and various factors such as pressure, temperature, gas flow rate and the like in the production process can fluctuate to different degrees, so that the various factors have mutual influence, and different adsorption towers also need to work cooperatively under the condition of fully considering the various factors. Therefore, the adjustment of the adsorption tower in production is a laborious and time-consuming matter, and the improper adjustment can adversely affect the working effect of the adsorption tower, and even seriously affect the production.

Therefore, the adsorption self-adaptive adjusting method and system for the adsorption tower can realize the self-adaptive adjustment of each treatment link of the adsorption process of the adsorption tower automatically and intelligently, reduce the cost of manpower, material resources and time, and simultaneously enable the process parameters adjusted in the adsorption process of the adsorption tower to be more accurate.

Disclosure of Invention

One of the embodiments of the present disclosure provides an adsorption tower adsorption adaptive regulation system, which includes at least two adsorption towers, a connecting pipeline, a control valve and a controller; each adsorption tower comprises an air inlet and an air outlet, and the air inlet is connected with an air inlet pipeline of the adsorption tower; the air outlet is connected with an air outlet pipeline of the adsorption tower; the air inlet and the air outlet are honeycomb-shaped; the connecting pipelines comprise a first connecting pipeline and a second connecting pipeline, and the first connecting pipeline is used for connecting air inlet pipelines of the two adsorption towers; the second connecting pipeline is used for connecting the air outlet pipelines of the two adsorption towers; the control valve is arranged in the connecting pipeline and is used for adjusting the gas pressure and/or the flushing flow rate in each adsorption tower; the controller is used for: determining a target opening of the control valve based on gas-related data in each of the adsorption towers, wherein the gas-related data includes gas pressure data and gas flow rate data; and adjusting the opening of the control valve based on the target opening.

One of the embodiments of the present specification provides a method for adjusting an adsorption self-adaptive adjustment system of an adsorption tower, the adsorption self-adaptive adjustment system of an adsorption tower including at least two adsorption towers, a connecting pipe, a control valve, and a controller, the method being performed by the controller, the method comprising: determining a target opening of the control valve based on gas-related data in each of the adsorption towers, wherein the gas-related data includes gas pressure data and gas flow rate data; and adjusting the opening of the control valve based on the target opening.

One of the embodiments of the present disclosure provides a computer-readable storage medium storing computer instructions that, when read by a computer, perform the aforementioned method for adjusting an adsorption adaptive adjustment system of an adsorption tower.

Drawings

The present specification will be further elucidated by way of example embodiments, which will be described in detail by means of the accompanying drawings. The embodiments are not limiting, in which like numerals represent like structures, wherein:

FIG. 1 is an exemplary schematic diagram of an adsorption column adsorption adaptation system according to some embodiments of the present disclosure;

FIG. 2 is an exemplary flow chart of a method of regulating a control valve according to some embodiments of the present disclosure;

FIG. 3 is an exemplary flow chart of a method of determining a target opening of a control valve according to some embodiments of the present disclosure;

FIG. 4 is an exemplary flowchart illustrating yet another method of determining a target opening of a control valve according to some embodiments of the present disclosure;

FIG. 5 is an exemplary schematic diagram of a pressure change rate prediction model shown in accordance with some embodiments of the present description;

FIG. 6 is an exemplary schematic diagram of a flush model shown in accordance with some embodiments of the present description;

FIG. 7 is an exemplary flow chart of a method of controlling a pneumatic safety valve according to some embodiments of the present description.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present specification, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is apparent that the drawings in the following description are only some examples or embodiments of the present specification, and it is possible for those of ordinary skill in the art to apply the present specification to other similar situations according to the drawings without inventive effort. Unless otherwise apparent from the context of the language or otherwise specified, like reference numerals in the figures refer to like structures or operations.

It will be appreciated that "system," "apparatus," "unit" and/or "module" as used herein is one method for distinguishing between different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

The terms "a," "an," "the," and/or "the" are not specific to the singular, but may include the plural, unless the context clearly indicates otherwise. In general, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and they do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus.

A flowchart is used in this specification to describe the operations performed by the system according to embodiments of the present specification. It should be appreciated that the preceding or following operations are not necessarily performed in order precisely. Rather, the steps may be processed in reverse order or simultaneously. Also, other operations may be added to or removed from these processes.

Fig. 1 is an exemplary schematic diagram of an adsorption column adsorption adaptive regulation system according to some embodiments of the present disclosure. Hereinafter, the adsorption self-adaptive adjusting system of the adsorption tower according to the embodiment of the present specification will be described in detail. It should be noted that the following examples are only for explaining the present specification, and do not constitute a limitation of the present specification.

In some embodiments, the adsorption tower adsorption adaptive modulation system 100 (hereinafter referred to as system 100) may include at least two adsorption towers, connecting piping, control valves, and a controller.

The adsorption tower can treat the gas and/or fixed particles discharged by industry, so as to purify and separate the gas discharged by industry. The adsorption tower can be provided with different types of adsorbents. For example, the adsorbent may be an organic adsorbent (e.g., activated carbon adsorbent, carbonized resin), or an inorganic adsorbent (e.g., silica gel, aluminum chloride), or the like.

The adsorption process of the adsorption tower can comprise a plurality of preset treatment links. For example, the adsorption process may include adsorption treatment, desorption treatment, and the like, wherein the desorption treatment may further include treatment links such as pressure equalizing, sequential discharge, reverse discharge, vacuum pumping/flushing, pressure equalizing, and final filling. The adsorption tower can adsorb different types of gases through different types of adsorbents. For example, the adsorption tower may adsorb organic waste gas, odor, etc. in the raw material gas discharged industrially by the activated carbon adsorbent to purify the raw material gas; meanwhile, the adsorbent may be regenerated by desorption treatment so that the adsorbent is subjected to the next adsorption treatment.

In some embodiments, the system 100 may include two or more adsorption columns. The adsorption towers can independently or cooperatively work in each treatment link of the adsorption process according to production requirements (such as adsorption treatment efficiency, adsorbent regeneration utilization rate, production safety), configuration of process parameters (such as temperature, pressure and gas flow rate) and the like. For example, in the adsorption process, a single adsorption column may be operated alone; an adsorption tower in the sequential process may be operated in concert with an adsorption tower in the rinse process.

The adsorption tower comprises an air inlet and an air outlet which are respectively connected with an air inlet pipeline and an air outlet pipeline. In some embodiments, the gas inlet and outlet of the adsorption tower may be honeycomb-shaped and may include a plurality of sub-pipes therein. For example, the honeycomb-shaped air inlet and/or air outlet may comprise a plurality of identical and uniformly distributed sub-ducts which meet at the air inlet duct.

In some embodiments, the sub-pipelines in the honeycomb gas inlet and/or the gas outlet of the adsorption tower can further comprise a pneumatic safety valve, which is used for opening or closing according to the gas pressure and/or the gas flow rate in the adsorption tower, so as to adjust the gas pressure or the gas flow rate in the adsorption tower. For example, the pneumatic safety valve may preset an opening pressure value according to an actual requirement, and when the pressure value of the sub-pipeline provided with the pneumatic safety valve is greater than the preset opening pressure value, the pneumatic safety valve is opened; and when the pressure value of the sub-pipeline is reduced below a preset pressure value, closing the pneumatic safety valve. In some embodiments, the pneumatic relief valve may also be automatically opened or closed according to a preset opening pressure. In some embodiments, the number of pneumatic safety valves provided in the aforementioned subducting may be configured according to production needs, for example, in proportion (e.g., 20%) to the total number of subducting in the inlet and/or outlet.

The connecting pipe may be used to connect two adjacent adsorption towers among the at least two adsorption towers. For example, the connecting pipeline can be connected with the air outlet pipeline of the two adsorption towers through the first connecting pipeline, and can be connected with the air inlet pipeline of the two adsorption towers through the second connecting pipeline, so that the connection between the two adsorption towers is realized.

In some embodiments, a plurality of parallel subducting may be provided in the connecting duct. For example, the connecting conduit may comprise a first sub-conduit and a second sub-conduit arranged in parallel. Wherein the first and second sub-pipes may be two identical pipes. In some embodiments, the connecting conduit may have a plurality of different segments (e.g., 3 segments), with parallel subducting disposed in a middle segment thereof and two other segments not disposed.

A control valve is a device that can be used to control the flow of gas through a connecting conduit. The control valve can control the flow of the gas in the connecting pipeline through different valve openings, so that the pressure value or the gas flow rate in the adsorption tower or the connecting pipeline can be regulated. The opening of the control valve may be a value in the interval 0, 1. For example, an opening degree of 0 indicates that the control valve is in a closed state; the opening degree of 1 represents a fully opened state, and the opening degree of 0.5 represents a half opened state.

In some embodiments, the control valve may include a plurality of different types of valves. For example, the control valve may include a switch valve, a regulator valve, and the like. In some embodiments, in sections of the connecting duct where no subducting is provided, a switch valve may be provided for controlling whether the connecting duct allows gas flow, which may be configured to be only fully closed or fully open. The regulating valve can have any one of the opening degrees [0,1], which can regulate the flow rate of the gas in the connecting pipeline.

In some embodiments, the regulator valve may be disposed in parallel subducting within the connecting duct. For example, the adjusting valves may include a first adjusting valve corresponding to a first sub-pipe and a second adjusting valve corresponding to a second sub-pipe in the connecting pipe, which are used for adjusting the gas flow rates of the first sub-pipe and the second sub-pipe, respectively. In some embodiments, the control valve may be one or a combination of an on-off valve and a regulating valve, the number of which may be configured according to the actual needs of the production. The present specification is not limited thereto.

In some embodiments, the control valve may be responsive to a valve command from the controller to effect adjustment of the opening. For example, in response to a valve command sent by the controller with an opening of 0.4, the control valve may be adjusted from a current opening (e.g., 0.8) to an opening of 0.4.

In some embodiments, the system 100 may further include a pressure acquisition device for acquiring real-time gas pressure data within the adsorption column. As shown in fig. 1, the pressure pickup device may include a pressure pickup device 130-1 in the adsorption column 110-1, and a pressure pickup device 130-2 in the adsorption column 110-2. It is understood that the number of pressure collecting devices may correspond to the number of adsorption towers.

It should be noted that the pressure acquisition device may be disposed at an appropriate location in the system 100 according to actual production requirements. For example, the pressure acquisition device may be disposed in an outlet pipe or an inlet pipe of the adsorption tower, or may be disposed on both sides of a control valve (such as a switch valve, a regulating valve) in a connection pipe, etc.

In some embodiments, the system 100 may further include a flow rate detection device for obtaining a real-time gas flow rate within the adsorption column. As shown in fig. 1, the flow rate detecting means may include a flow rate detecting means 140-1 in the adsorption tower 110-1, a flow rate detecting means 140-2 in the adsorption tower 110-2. It is understood that the number of flow rate detecting means may correspond to the number of adsorption towers.

It should be noted that the flow rate detection device may be disposed at an appropriate location in the system 100 according to actual production requirements. For example, the flow rate detection device may be provided on the outlet pipe or the inlet pipe of the adsorption tower, or may be provided on both sides of a control valve (on-off valve, regulating valve) in the connection pipe, or the like.

The system 100 also includes a controller 150 that may be used to process data and/or information obtained from other components of the system 100 or other information sources. For example, the controller 150 may acquire gas-related data in each adsorption tower. For example, the controller 150 may obtain the pressure value of each pressure acquisition device to obtain the real-time pressure condition in the corresponding adsorption tower, and may also obtain the gas flow rate value of each flow rate detection device to obtain the real-time flow rate condition in the corresponding adsorption tower. The controller 150 may also obtain other information in production, such as user demand information (e.g., pressure change rate requirements, gas flow rate requirements), information about the adsorption tower (e.g., information about the adsorption tower itself, information about the adsorbent in the adsorption tower), specifications of the conduit (e.g., material, diameter, wall thickness of the conduit), etc.

The controller 150 may also execute control instructions (e.g., program instructions) to perform one or more of the functions described herein. For example, the controller may adjust the opening of one or more control valves based on the valve control instructions. The valve control command may include information about the control valve (such as an identifier or a number of the control valve) to control or regulate the specific control valve. For example, for regulating the control valve, the controller may regulate the first regulating valve to be closed or fully opened, or may regulate the opening of the second regulating valve to be any opening (e.g., 0.5) between 0 (closed) and 1 (fully opened). In some embodiments, the controller may control the on-off valve of the second connection pipe to be in an off state, and may control the on-off valve of the first connection pipe to be in an on state and adjust the opening of one or more adjustment valves of the first connection pipe to implement independent or cooperative operation of the plurality of adsorption towers in the adsorption process. It can be understood that the opening, closing, opening adjustment and the like of different control valves (such as a switch valve and an adjusting valve) can be combined in each processing link of different adsorption processes so as to meet the actual production requirement.

In some embodiments of the present disclosure, through the system 100, in each production link of the adsorption tower, the opening of the control valve can be automatically and intelligently adjusted according to the gas related data in the adsorption tower, so as to realize the self-adaptive adjustment of the system 100.

It should be noted that the adsorption tower adsorption adaptive modulation system 100 is provided for illustrative purposes only and is not intended to limit the scope of the present description. Many modifications and variations will be apparent to those of ordinary skill in the art in light of the present description. For example, the adsorption column adsorption adaptive modulation system 100 may include other suitable one or more components to achieve similar or different functions. However, variations and modifications do not depart from the scope of the present description.

FIG. 2 is an exemplary flow chart of a method of regulating a control valve according to some embodiments of the present disclosure.

In some embodiments, the process 200 may be performed by a controller. As shown in fig. 2, the process 200 includes the steps of:

at step 210, a target opening of the control valve is determined based on gas related data within each adsorption tower, wherein the gas related data includes gas pressure data and gas flow rate data.

The gas related data may refer to information related to the gas in each of the at least two adsorption columns. The gas related data may include information of the type of gas, the composition of the gas, and the like. For example, the gas may be a mixed gas that includes a plurality of different types of impurities, organic chemical components, and the like. In some embodiments, the gas related data may include gas pressure data, gas flow rate data, etc. in the adsorption column.

The gas related data can be obtained according to production scenes and various monitoring devices. For example, the type, composition of the feed gas may be determined based on the production scenario; pressure data, gas flow rate data, etc. can be acquired by the pressure acquisition device, the flow rate detection device.

The target opening degree may refer to an opening degree of the control valve in satisfying a requirement in the adsorption process, wherein the opening degree may be used to characterize a degree of opening of the control valve. The opening degree may be represented by a numerical value in the interval [0,1 ]. Illustratively, 0 indicates that the control valve is fully closed, 1 indicates that it is fully open, and 0.5 indicates that it is semi-open. The target opening degree may also be expressed in other various preset forms. For example, the opening degree of the control valve can be mapped into a value (such as 5) and a percentage (such as 50%) of the interval [0, 10 ]. For details regarding the adsorption process, control valves see fig. 1 and the description thereof.

The target opening may be the opening of one or more control valve combinations of the plurality of control valves. For example, the target opening degree may be a combination of opening degrees of two parallel adjustment valves in a connection pipe of the outlet pipe. For example, the opening degree of the first regulating valve is 0.4, and the opening degree of the second regulating valve is 0.8. In some embodiments, the target opening degree may be represented by a form of a vector (a, b), wherein the elements a, b of the vector represent the opening degree of the first regulating valve and the opening degree of the second regulating valve, respectively. For example, the target opening degree formed by the combination of the opening degrees of the first regulating valve and the second regulating valve described above may be expressed by a vector (0.4, 0.8).

In some embodiments, the target opening degree may be preset based on production demand or production experience. For example, a process timing schedule may be set according to different adsorption process flows, and corresponding target opening degrees may be preset for different processing links. The controller can obtain corresponding target opening from the process time sequence table according to the information of the processing starting time point, the processing duration and the like of each adsorption process processing link, and generate a valve instruction to adjust the opening of the corresponding control valve based on the target opening.

In some embodiments, the controller may analyze the actual conditions in the adsorption tower in the adsorption process to determine the target opening, thereby implementing adaptive adjustment of the control valve. For example, the controller may determine the target opening according to a processing link of an adsorption process in which the adsorption tower is located, a real-time gas pressure condition in the adsorption tower, a gas flow rate condition, and the like.

In some embodiments, the controller may determine the target opening according to a condition of the pressure change rate in the adsorption tower such that the pressure change rate is controlled within a preset range. See fig. 3 and its description for more details.

In some embodiments, the controller may further determine the target opening according to a relationship between the real-time gas flow rate of the adsorption tower and a preset gas flow rate threshold range, so that the real-time gas flow rate is within the preset flow rate range. See fig. 4 and description for more.

Step 220, adjusting the opening of the control valve based on the target opening.

In some embodiments, the controller may generate a target valve command to adjust the corresponding control valve based on the target opening. For example, the target opening (0.4, 0.8) is set to 0.4 for the first regulator valve and 0.8 for the second regulator valve by the controller according to the target valve command.

According to the embodiments of the present disclosure, according to the real-time conditions of the gas in the adsorption towers in each process link of the adsorption process and the cooperative requirements of the adsorption process and the desorption process between different adsorption towers, the target opening of the control valve is determined, so that the self-adaptive adjustment can be realized, so as to satisfy the accurate control of the pressure change rate and the gas flow rate.

Fig. 3 is an exemplary flowchart of a method of determining a target opening of a control valve according to some embodiments of the present disclosure.

In some embodiments, the process 300 may be performed by a controller. As shown in fig. 3, the process 300 includes the steps of:

in step 310, real-time pressure data of each adsorption tower is obtained through a pressure acquisition device.

The real-time pressure data may include pressure data within the adsorption tower at a point in time within a preset time period. The controller may acquire pressure values of the adsorption tower at different time points within a preset time period based on a preset time step (e.g., 5 s), and generate a pressure value sequence. The preset time period may be a duration of each treatment link in the adsorption process, for example, 30 minutes for adsorption treatment, 20 minutes for desorption treatment, and the like.

In some embodiments, the real-time pressure data may also include real-time pressure data between two connected adsorption towers. For example, for an adsorption tower in a sequential process and an adsorption tower connected thereto in a rinse process, the real-time pressure data may include a real-time pressure difference between the two adsorption towers at the same time.

The controller can obtain real-time pressure data of the corresponding adsorption tower through the pressure acquisition device arranged in the adsorption tower.

Step 320, determining a first opening corresponding to the first regulating valve and/or a second opening corresponding to the second regulating valve in the target opening based on the real-time pressure data and the preset pressure change rate.

For the content regarding the target opening degree, see fig. 2 and the description thereof.

The first opening may be indicative of a target opening for the first regulator valve. The second opening may be indicative of a target opening for the second regulator valve. The first opening and the second opening at different time points may be different opening values, and the first opening and the second opening may be a combination of a plurality of different opening values.

The rate of pressure change may be indicative of the magnitude of the change in gas pressure in the adsorption column per unit time or over a preset period of time. The rate of pressure change may have a direction. For example, the rate of pressure change may be 0.8MPa/min, i.e., indicating an increase of 0.8MPa per minute; -50KPa/s means a 50KPa decrease per second.

The preset pressure change rate may refer to a pressure change rate determined according to actual production requirements. The pressure requirements are different in different adsorption process treatment links, and the uniform change of the pressure is beneficial to the safe and stable production in the process of adjusting the current pressure to the target pressure.

In some embodiments, the controller may determine a real-time pressure change rate of each adsorption tower over a preset time period based on the real-time pressure data, and adjust the first opening and/or the second opening in response to a difference between the real-time pressure change rate and the preset pressure change rate being greater than a first preset threshold.

The real-time pressure change rate may refer to the rate of change of the actual pressure over a period of time until the current time. For example, when the pressure in the adsorption tower is reduced from 1.6MPa to 0.8MPa by the current time from the last 1 minute, the real-time pressure change rate is-0.8 MPa/min.

The controller can adjust the first opening and/or the second opening according to the relation between the real-time pressure change rate and the preset pressure change rate, so that the real-time pressure change rate is maintained within the fluctuation range of the preset pressure change rate meeting the production requirement.

The first preset threshold may be used to characterize whether the deviation of the real-time pressure change rate from the preset pressure change rate meets production requirements. Which can be set manually based on production experience. For example, the first preset threshold may be 0.01Mpa/min. It can be appreciated that the real-time pressure change rate fluctuates within a range where the preset pressure change rate is appropriate, facilitating the performance of the adsorption process.

In some embodiments, the controller may obtain a difference between the real-time pressure change rate and the preset pressure change rate, and when the difference is greater than a first preset threshold, the controller may adjust the first opening and/or the second opening. For example, a reference table of the current pressure change rate, the target opening degree, and the target pressure change rate may be preset, where the target opening degree in the reference table may include the opening degree of the first regulator valve and the opening degree of the second regulator valve, for example, (0.4, 0.8). The controller may obtain the current pressure change rate, and match the current pressure change rate and a target opening corresponding to the target pressure change rate (i.e., a preset pressure change rate) in the reference table, so as to adjust the opening of the first regulating valve and/or the second regulating valve based on the target opening.

In some embodiments, the controller may also determine the first opening degree and/or the second opening degree in real time based on a pressure change rate prediction model. See fig. 4 and its description for more details.

In some embodiments of the present disclosure, the target opening is determined by a relationship between a real-time pressure change rate and a preset pressure change rate, so as to help maintain the pressure change rate of the adsorption tower at a proper level, avoid a safety problem caused by too fast pressure change (such as damage to the adsorbent), and avoid an adsorption process treatment efficiency problem caused by too slow pressure change (such as low efficiency of the adsorbent for gas adsorption).

The controller may also determine the target opening based on a fault condition of the first regulating valve or the second regulating valve.

In some embodiments, in response to a failure of one of the regulator valves, the controller may lock the opening of the failed regulator valve to the current opening, adjusting the opening of the other regulator valve. Details of how to determine the fault condition of the regulator valve are described below.

Among them, the failure may include various types of failures, for example, the adjustment valve is stuck due to reasons such as aging, rust, etc., resulting in an inability to adjust its opening, failure to respond to a control command, etc. The failed regulator valve may be referred to as a failed valve. At this time, the controller may lock the opening of the malfunctioning valve (e.g., the first adjustment valve) to the current opening (i.e., the first opening is not set), and adjust the opening of the other adjustment valve (e.g., the second adjustment valve) by the control valve command.

For example, when the first regulating valve fails, the controller may take the current opening of the first regulating valve as a first opening, and obtain a second opening corresponding to the second regulating valve according to a production requirement (such as a pressure change rate requirement in the adsorption tower) in the adsorption process and the first opening, and further take the first opening and the second opening as target openings, so as to generate a target valve instruction, or generate a valve instruction for the second opening separately, so as to regulate the opening of the second regulating valve.

It can be understood that the opening degrees of the plurality of regulating valves can cooperatively complete the regulation of the real-time conditions (such as the pressure change rate) of each treatment link of the adsorption tower process. When a certain regulating valve fails and the failed valve cannot be maintained or replaced in time, the controller needs to adaptively adjust the opening of other regulating valves by combining the current opening of the failed valve (for example, taking the opening as the target opening of the failed valve), so as to meet the production requirement.

According to some embodiments of the specification, by arranging the independent first adjusting valve and the second adjusting valve, when one of the adjusting valves fails, normal operation of the adsorption process of the adsorption tower can be guaranteed to the greatest extent, and the influence on production after the failure of the single adjusting valve is avoided.

In some embodiments, the controller may troubleshoot the control valve based on the rate of pressure change within the adsorption column and the adjustment of the opening of the control valve, where the troubleshooting may include the number of failed valves and the particular failed control valve.

In some embodiments, the controller may determine the fault condition of the regulator valve based on the real-time pressure change rate and a pressure change rate prediction value (hereinafter may be simply referred to as a prediction value) of the adsorption tower. For example, after the opening degree of the first regulating valve and/or the second regulating valve is regulated, the real-time pressure change rate is greatly different from the predicted value. The opening degree adjustment of the first adjusting valve and/or the second adjusting valve can be preliminarily judged to be not effective, and the first adjusting valve and/or the second adjusting valve is failed. Wherein the predicted value may be determined based on the pressure change rate prediction model, see fig. 5 and the description thereof for the relevant content of the pressure change rate prediction model.

In some embodiments, the controller may set a plurality of sets of valve openings to the adjustment valve in response to a first difference value of the real-time pressure change rate and the predicted value for each adsorption column being greater than a second preset threshold, each set of valve openings including a first opening and a second opening; wherein the first opening and the second opening in each set of valve openings are in opposite directions. For example, the opening degree of the first regulating valve is in the opening direction, and the opening degree of the second regulating valve is in the closing direction.

It is understood that the controller may obtain the predicted value of the pressure change rate corresponding to the current target opening based on the current target opening. In the process of adjusting the target opening, the controller cannot respond to the adjustment of the controller when the adjusting valve fails, so that the actual pressure change rate and the predicted value have larger difference, and one or more of the adjusting valves can be judged to fail.

The first difference value may refer to a deviation value of an actual pressure change rate from a predicted value at a current target opening, which may be used to characterize whether the regulating valve has a fault. The larger the deviation value is, the greater the probability of the adjusting valve to fail.

The second preset threshold may be used to characterize the magnitude of the deviation of the first difference value. It may be empirically preset. For example, 0.5MPa/min. When the first difference value is greater than the second preset threshold value, it may be characterized that at least one of the regulating valves has failed.

In some embodiments, in response to the first difference value being greater than the second preset threshold, the controller may set a plurality of sets of adjustment valve openings to troubleshoot the adjustment valves, wherein the adjustment directions of the first opening and the second opening in each set of valve openings are opposite.

For example, the current regulating valve opening is (0.5 ) and the multiple sets of regulating valve openings may be (0.4, 06), (0.3, 0.7), (0.2, 0.8), etc. The controller may set each of the plurality of sets of adjustment valve openings to the first adjustment valve and the second adjustment valve according to a timing rule (e.g., using 20s as a time step). And respectively acquiring the real-time pressure change rate under each group of valve opening and the predicted value of the pressure change rate under the group of valve opening, thereby acquiring a plurality of second difference values of the predicted values of the real-time pressure change rate and the pressure change rate under each group of valve opening. Illustratively, the aforementioned sets of valve openings (0.4, 06), (0.3, 0.7), (0.2, 0.8) correspond to 3 second differential values.

The second difference value may be used to represent a difference value between the real-time pressure change rate and the predicted value when troubleshooting is performed through the opening degrees of the plurality of groups of adjusting valves, and the plurality of second difference values obtained under each group of adjusting valve opening degrees may represent a confidence (confidence level) that the adjusting valve fails.

In some embodiments, the controller may perform the troubleshooting process on the adjustment valve based on the following steps S1 to S3:

in response to no or little change between the plurality of second differential values, the controller may determine that both the first and second regulator valves are malfunctioning, step S1. It can be understood that the second difference value is unchanged under the different valve opening of the plurality of groups, which indicates that the opening of the regulating valve is not successfully regulated, that is, the first regulating valve and the second regulating valve are in a fault state.

And S2, resetting the opening degrees of the multiple groups of valves in response to the gradual increase of the second difference value, so that the opening degree changing directions of the first regulating valve and the second regulating valve are changed. The controller may obtain the real-time pressure change rate and the second differential value for each of the reset plurality of sets of valve openings. When the second difference value changes under the opening of a plurality of groups of different valves, the opening of at least one regulating valve is indicated to change under the regulation of the controller, and the change direction of the opening of the first regulating valve and the opening of the second regulating valve can be further determined by changing: whether the opening degree of the regulating valve is changed or not is completely regulated according to the valve command of the controller (namely, completely normal state).

And step S3, in response to the fact that the second difference value is gradually reduced to be the same as the predicted value, determining that one regulating valve fails and the other regulating valve is normal.

It will be appreciated that, in the process from the second difference value of step S2 becoming larger to the second difference value of step S3 being the same as the predicted value, it may be indicated that the adjustment of the opening of one of the adjustment valves may be effected in real time according to the valve command of the controller. At this time, the controller may acquire the valve opening corresponding to the real-time pressure change rate that is the same as the predicted value. And the real-time pressure change rate is the same as the predicted value, and the current opening of the normal valve and the current opening of the fault valve are included in the group of valve openings. For example, the set of valve openings is (0.3, 0.7), and the malfunctioning valve may be a first regulator valve corresponding to 0.3, or a second regulator valve corresponding to 0.7. In other words, the first regulator valve may be locked at a position having an opening of 0.3, or the second regulator valve may be locked at a position having an opening of 0.7. The controller can conduct subsequent investigation of the specific malfunctioning valve based on the opening degree being 0.3 or the opening degree being 0.7. As described in detail below.

According to some embodiments of the present disclosure, the adjusting valves are adjusted by setting multiple groups of adjusting valve openings, and based on a deviation relationship between a real-time pressure change rate and a predicted value of each group of adjusting valve openings, the number of faulty valves can be determined, and a current opening value of the faulty valve can be determined, so as to realize subsequent further determination of a specific faulty valve.

In some embodiments, the controller may further determine a specific failed regulator valve after determining one of the number of failed valves and the current opening of the failed valve (referred to herein as the failed opening) based on the foregoing step S3.

In response to one of the regulating valves being a failed valve and the other regulating valve being a normal valve, the controller may additionally set a plurality of sets of valve openings based on the current valve opening (the valve opening determined in step S3), wherein one valve opening is fixed as the failed opening and the opening of the other regulating valve is continuously regulated in the same direction in each set of valve openings of the plurality of sets of valve openings additionally set. For example, the opening of the other regulating valve may be gradually adjusted in a direction to increase (open) based on a preset opening step (e.g., 0.1).

If the second difference value between the actual pressure change rate of the adsorption tower and the predicted value is gradually increased under the opening of the plurality of sets of valves, the regulating valve with fixed opening is a fault valve, and the valve with variable opening is a normal valve; otherwise, the regulating valve with variable opening is a fault valve, and the regulating valve with fixed opening is a normal valve.

Illustratively, the first regulating valve is fixed at the fault opening (e.g., 0.3 in the foregoing step S3), and the opening of the second regulating valve is adjusted through multiple rounds, for example, the opening of the second regulating valve is adjusted as follows: first round 0.4, second round 0.5, third round 0.6, etc. If the second difference value is not changed (or the change is small), the opening of the second regulating valve is not effective, and the current opening of the second regulating valve is the fault opening (such as 0.7), namely the current opening is clamped at the position with the opening of 0.7; otherwise, if the change of the second difference value gradually increases, the opening adjustment of the second adjusting valve is effective, at this time, the second adjusting valve is a normal valve, the first adjusting valve is a fault valve, and the opening of the first adjusting valve is the fault opening (e.g. 0.3).

It should be noted that, to determine the confidence of the failed valve, the controller may determine whether the first regulating valve or the second valve is the failed valve based on multiple rounds of investigation. For example, the first round may assume that the first regulating valve is a faulty valve, the opening of which is the faulty opening (e.g., 0.3 or 0.7) of the foregoing step S3, or may assume that the second regulating valve is a faulty valve, the opening of which may be the same faulty opening (e.g., 0.3 or 0.7) of the foregoing step S3. And verifying the fault state of the first regulating valve or the second regulating valve through multiple rounds of investigation.

According to some embodiments of the specification, one of the regulating valves is fixed, the opening of the other regulating valve is regulated, a specific fault valve or a normal valve can be determined based on the deviation of the real-time pressure change rate and the predicted value, meanwhile, the result of investigation can be facilitated to be more targeted based on the fact that one of the regulating valves is fixed to be the fault opening, in addition, the current opening of the fault valve is determined, and the purpose that the opening of the normal valve can be regulated to adapt to the production requirement can be achieved even if the regulating valve breaks down is achieved.

In some embodiments, after determining the failed valve, the controller may fix the opening of the failed valve as the failed opening, and re-determine the opening of the normal valve based on the failed opening and the pressure change rate prediction model, thereby determining the target opening. In combination with the foregoing example of step S3, merely by way of example, based on the first adjusting valve determined in step S3 being a failed valve and the failed opening (e.g., 0.3) of the first adjusting valve, the controller may take the opening of the failed valve as the first opening, and obtain the second opening corresponding to the second adjusting valve according to the pressure change rate prediction model. And the fault opening and the second opening are used as target opening to realize the adjustment of the second adjusting valve. Here, for example only, since the opening degree of the malfunction valve cannot be adjusted, the controller may generate a valve command corresponding to the second adjustment valve based on the second opening degree, and adjust the second adjustment valve alone. See fig. 5 for relevant content on the pressure change rate prediction model.

It can be understood that, for the failed regulating valve, when one regulating valve cannot be regulated by regulating another regulating valve, the target opening meeting the production requirement (such as the pressure change rate) can be obtained to the maximum extent through the normal regulating valve, so as to maintain the normal operation of the adsorption process.

According to some embodiments of the specification, the opening of the first adjusting valve and the opening of the second adjusting valve are adjusted according to real-time pressure data of the adsorption tower, the adsorption tower can be adaptively adjusted in each treatment link of the adsorption process, and meanwhile, the first adjusting valve and the second adjusting valve can cooperatively work, so that the effectiveness of self-adaptive adjustment is guaranteed to the greatest extent.

Fig. 4 is an exemplary flowchart of yet another method of determining a target opening of a control valve according to some embodiments of the present disclosure.

In some embodiments, the process 400 may be performed by a controller. As shown in fig. 4, the process 400 includes the steps of:

in some embodiments, the target opening is also related to a real-time purge flow rate of the gas within the adsorption column, and the controller may determine the opening of the first regulator valve and/or the second regulator valve based on the real-time purge flow rate.

In step 410, the real-time flushing flow rate of each adsorption tower is obtained by the flow rate detection device.

The real-time purge flow rate may refer to the current purge rate of the gas in the adsorption column. Which may be the gas flow rate of the purge process in the desorption process. The flushing process may enable regeneration of the adsorbent in the adsorption column. The controller can obtain the real-time flushing flow rate through the flow rate detection device. For the relevant content of the flow rate detection device, see fig. 1 and the description thereof.

Step 420, determining a first opening corresponding to the first regulating valve and/or a second opening corresponding to the second regulating valve in the target opening based on the real-time flushing flow rate and the preset flushing flow rate threshold range.

The preset flush flow rate threshold range may refer to a gas flow rate range that meets production requirements, which may be preset based on production experience. The preset flush flow rate threshold range may be set according to different types of adsorbents, components of the gas to be treated (e.g., impurity components). Wherein the preset flush flow rate threshold range includes a minimum flush flow rate threshold and a maximum flush flow rate threshold.

In some embodiments, the preset flush flow rate threshold range may be determined from a flush model. See fig. 6 and its description for the context of the flush model.

In some embodiments, the controller may determine the target opening based on a relationship of the real-time flush flow rate to a preset flush flow rate threshold range. For the content regarding the target opening degree, see fig. 2 and the description thereof.

In response to the real-time flush flow rate being greater than the maximum flush threshold, the controller may determine a first adjustment magnitude based on a difference between the real-time flush flow rate and the maximum flush threshold, and determine a corresponding target gas flow rate value based on the first adjustment magnitude. The controller may adjust the current opening of the control valve (e.g., the first adjustment valve and/or the second adjustment valve) to a target opening corresponding to the target gas flow rate based on the target gas flow rate.

It should be noted that the first adjustment amplitude may be greater than the difference between the real-time flushing flow rate and the maximum flushing threshold. For convenience of description, the preset flushing flow threshold range is [10, 20], the current real-time flushing flow is 25, and the difference between the real-time flushing flow and the maximum flushing threshold is 25-20=5. The first adjustment amplitude may be 6 and the target gas flow rate 25-6=19. The controller may perform a reduction process on the opening of the control valve based on the opening of the control valve corresponding to the target gas flow rate as the target opening.

In response to the real-time flush flow rate being less than the minimum flush threshold, the controller may determine a second adjustment magnitude value based on a difference between the real-time flush flow rate and the minimum flush threshold, and determine a corresponding target gas flow rate based on the second adjustment magnitude, and the controller may adjust the current opening of the control valve to a target opening corresponding to the target gas flow rate based on the target gas flow rate.

The first adjustment amplitude may refer to a value that down-regulates the real-time flush flow rate. Which may characterize the difference in the target flush flow rate after the down-regulation from the current real-time flush flow rate. In some embodiments, the controller may determine the target flush flow rate based on the first adjustment amplitude such that the target flush flow rate is within a preset flush flow rate threshold range.

The second adjustment amplitude may refer to a value that adjusts up the real-time flush flow rate. Which may characterize the difference in the up-regulated target flush flow rate from the current real-time flush flow rate. In some embodiments, the controller may determine the target flush flow rate based on the second adjustment amplitude such that the target flush flow rate is within a preset flush flow rate threshold range.

The controller may determine a target opening corresponding to the target flush flow rate based on the adjusted down or up target flush flow rate. In some embodiments, the controller may determine, when the real-time flushing flow rate exceeds a preset flushing flow rate threshold range (e.g., greater than a maximum flushing threshold or less than a minimum flushing threshold), a target flushing flow rate through a first adjustment range or a second adjustment range, obtain, based on a search match, a target opening corresponding to the target flushing flow rate from the relation table, and adjust, through a valve instruction, an opening of the first adjustment valve and/or the second adjustment valve.

In some embodiments, the first and second adjustment magnitudes are also related to a preset rate of pressure change.

In some embodiments, after determining the target flow rate and the target opening corresponding to the target flow rate based on the first adjustment amplitude and/or the second adjustment amplitude, the controller may analyze the target opening through a pressure change rate prediction model to obtain a predicted value of the pressure change rate, where when the predicted value is smaller than a first preset threshold, the target opening may be used as a final target opening, and adjust the first adjusting valve and/or the second adjusting valve according to the target opening, otherwise, the first adjustment amplitude or the second adjustment amplitude may be gradually increased (e.g. accumulated based on the same value) through a multiple iteration manner, so as to obtain a new target flow rate and a target opening corresponding to the new target flow rate, until the predicted value of the pressure change rate corresponding to the new target opening is smaller than the first preset threshold, so as to obtain the final target opening.

For the relevant content of the first preset threshold, see fig. 3 and the description thereof. See fig. 5 for relevant content on the pressure change rate prediction model.

According to the method and the device, when the target opening is determined through the real-time flushing flow rate and the preset flushing flow rate range threshold, the pressure change rate is considered to be in a proper range, so that the determined target opening can fully consider the uniformity of pressure change, and the normal production can be better ensured.

According to some embodiments of the present disclosure, through real-time flushing flow rate data of the adsorption tower, the opening degrees of the first adjusting valve and the second adjusting valve are adjusted, so that each processing link of the adsorption tower in the adsorption process can be adjusted in a self-adaptive manner, and meanwhile, based on the preset real-time flushing flow rate adjusted based on the target opening degree, the adsorbent can be better protected, and meanwhile, the performance of the adsorbent is improved.

FIG. 5 is an exemplary schematic diagram of a pressure change rate prediction model according to some embodiments of the present description.

In some embodiments, the adsorption tower includes an adsorption process and a desorption process, and the target opening may include a target adsorption opening at the time of the adsorption process and a target desorption opening at the time of the desorption process. The controller may determine the corresponding target opening based on production requirements of the adsorption process and/or the desorption process.

The target adsorption opening may refer to an opening of a control valve that satisfies a pressure change rate requirement when the adsorption tower performs the adsorption process. In some embodiments, the adsorption tower may need to adjust the gas pressure to a preset pressure value to optimize the effect of the adsorbent according to the production requirements of the adsorption process (e.g., the pressure requirements of the adsorbent). It can be understood that in different processes, the pressure requirements are different, and when the adsorption tower performs an adsorption treatment link, the controller can adjust the opening of the control valve to increase or decrease the value of the gas pressure in the adsorption tower to a preset adsorption pressure value. During the process of increasing or decreasing the pressure value in real time, the controller can adjust the control valve through different target adsorption opening degrees at a plurality of moments so as to maintain the uniform change of the pressure.

The target desorption opening may refer to an opening of a control valve that satisfies a pressure change rate requirement when the adsorption tower is subjected to desorption treatment. In some embodiments, when the adsorption tower is subjected to the desorption treatment, the gas pressure needs to be reduced to a preset desorption pressure value according to the production requirement (such as the production requirement) of the desorption treatment, so that the adsorbent releases the adsorbate (such as organic chemicals and dust) to achieve the optimal effect of adsorbent regeneration. During the real-time gas pressure reduction, the controller may adjust the control valve by varying the target desorption opening at various times to maintain a uniform pressure change.

In some embodiments, the controller may obtain a preset pressure change rate including an adsorption pressure change rate corresponding to an adsorption process and a desorption pressure change rate corresponding to a desorption process. Wherein the adsorption pressure change rate and desorption pressure change rate may be obtained based on production experience, and may be, for example, manually set values.

In some embodiments, the controller may process the pressure difference of the connected adsorption towers, the opening of the control valve, the raw gas data, the pipeline data, and the adsorption tower data based on the pressure change rate prediction model, and determine the pressure change rates corresponding to different target openings.

The pressure change rate prediction model may refer to a model for predicting the rate of change in pressure in the adsorption column. In some embodiments, the pressure change rate prediction model may be a trained machine learning model. For example, the pressure change rate prediction model may include any one or combination of a recurrent neural network (Recurrent Neural Network, RNN), long-short term memory neural network (Long Short Term Memory, LSTM) model, deep neural network (Deep Neural Networks, DNN) model, or other custom model structure.

In some embodiments, the inputs to the pressure change rate prediction model include a pressure difference, first and second openings, feed gas data, conduit data, and adsorption column data for the connected adsorption columns, and the pressure change rate is output by processing of the pressure change rate prediction model.

The pressure differential across the connected adsorption columns may be determined based on real-time pressure data. For relevant content on pressure data see fig. 2 and its description.

The first opening and the second opening may be a combination of a corresponding first opening of the first regulating valve and a corresponding second opening of the second regulating valve. Which may be a representation of the vector (a, b). For the content regarding the first opening degree and the second opening degree, see fig. 2 and description thereof.

The feed gas data may include information about the type, composition, and content or concentration of the feed gas.

The pipe data includes information such as the material, diameter, wall thickness, etc. of the connecting pipe.

The adsorption column data may include information on the type, height, volume, etc. of the adsorption column. The adsorber data may also include information about the adsorbent (e.g., type, number of adsorbents).

As shown in fig. 5, the controller may input the pressure change rate prediction model 520 to the pressure difference 511, the first and second openings 512, the raw gas data 513, the pipe data 514, and the adsorption tower data 515 of the connected adsorption tower, and output the pressure change rate based on the processing of the pressure change rate prediction model 520.

In some embodiments, the pressure change rate prediction model may be obtained by training multiple sets of first training samples with first labels. Each set of first training samples may include sample pressure differences, sample first and second openings, sample feed gas data, sample conduit data, and sample adsorption column data for the connected adsorption columns. Wherein the plurality of sets of first training samples may be obtained based on historical production data. For example, the aforementioned first training sample is obtained from historical production data over the past half year, 1 month. The first label may be a pressure change rate corresponding to each set of first training samples. For example, the first tag may be determined from the actual rate of pressure change in the historical production for each set of first training sample data over a corresponding historical period of time. The first tag may be labeled manually or the like.

In training the initial pressure change rate prediction model, the controller may input a first training sample of each set of samples to the pressure change rate prediction model. And outputting the pressure change rate through the processing of the pressure change rate prediction model. The controller can construct a loss function based on the first label and the output of the pressure change rate prediction model, and iteratively update parameters of the pressure change rate prediction model based on the loss function until the preset condition is satisfied and training is completed, so as to obtain a trained pressure change rate prediction model. The preset condition may be that the loss function is smaller than a threshold, converges, or the training period reaches the threshold.

In some embodiments, the controller determines a target opening corresponding to a preset pressure change rate according to a pressure change rate prediction model. For example, the controller may determine a plurality of pressure change rates (predicted values) based on a pressure change rate prediction model by setting a preset pressure change rate for each process link in the adsorption process according to different production requirements (e.g., type of adsorbent, pressure requirement). In actual production, the controller may take the first opening and the second opening corresponding to the predicted value closest to the preset pressure change rate as target openings, and further adjust the corresponding first adjusting valve and/or second adjusting valve in each processing link in the adsorption process based on the target openings.

In some embodiments, the first opening and the second opening input by the pressure change rate prediction model may be set to be uniformly distributed based on the same difference value. For example, the first opening may be a value in a sequence of opening steps that increase according to the same opening step, and for example, the opening step is 0.05, then the first opening may be 0.05, 0.1, 0.15, 0.2, etc., and the second opening is the same. Accordingly, the first opening and the second opening may be vectors formed by combining the first opening value and the second opening value. It should be noted that the opening step size is merely exemplary, and the opening step size of the first opening and the opening step size of the second opening may be the same or different, and the value of the opening step size may be accurately determined according to the control of the regulating valve.

It can be understood that the first opening and the second opening are uniformly distributed based on the same difference value, which is helpful for training the richness of the sample, and meanwhile, the opening of the regulating valve can be provided with a certain regularity, so that the smoothness of the opening regulation of the regulating valve is improved.

According to the embodiment of the specification, the pressure change rate prediction model can be combined with the production requirement of uniform change of pressure to obtain the corresponding target opening, the self-adaptive adjustment of the adjusting valve can be carried out based on the target opening, and meanwhile, the pressure change rate obtained based on the pressure change rate prediction model and the corresponding target opening result are more accurate.

Fig. 6 is an exemplary schematic diagram of a flush model shown in accordance with some embodiments of the present description.

In some embodiments, the controller may determine a flush flow rate threshold range based on the flush model. The input of the flushing model comprises material information of the adsorbent, gas information to be treated and a plurality of groups of flushing flow rates, and flushing results corresponding to the plurality of groups of flushing flow rates are output. Wherein the flushing model is a machine learning model, and the flushing results comprise adsorbent damage and adsorbent complete regeneration.

The purge model may refer to a model for determining a threshold range of gas purge flow rates within the adsorption column. In some embodiments, the flushing model may be a trained machine learning model. For example, the flushing model may include any one or combination of a Recurrent Neural Network (RNN), long short term memory neural network (LSTM) model, deep Neural Network (DNN) model, or other custom model structure.

In some embodiments, the inputs to the flush model include material information for the adsorbent, gas information to be treated, multiple sets of flush flow rates, and the flush results are output based on the processing of the flush model.

The material information of the adsorbent may include the type of adsorbent. Such as the type of activated carbon.

The gas to be treated may be a mixed gas of some kind. The information of the gas to be treated comprises the type and the component in the gas to be treated. For example, the gas information to be treated may include the type, content, concentration, or the like of the impurity.

The multiple sets of flush flow rates may be a combination of multiple flush flow rates. The number of sets of flushing flow rates may be one set or a preset number (e.g., 5 sets), which may be expressed in terms of vectors, e.g., vectors (S ₁ ，S ₂ ，S ₃ ，S ₄ ，S ₅ ) 5 different flushing flow rates S1, S2, S3, S4, S5 can be indicated.

In some embodiments, multiple sets of flush flow rates may be acquired based on historical data. It should be noted that the multiple sets of flushing flow rates may include multiple different adsorbents in the historical data, multiple different minimum flushing flow rates and maximum flushing flow rates corresponding to different gases to be treated. The multiple sets of flush flow rates may be, for example, a combination of multiple minimum flush flow rates or a combination of multiple maximum flush flow rates.

In some embodiments, for a certain adsorbent and a certain gas to be treated, the multiple sets of flow rates may be a minimum flow rate in the historical data, and the multiple flow rate values after up-down adjustment based on a preset flow rate step (e.g. 0.1) based on the minimum flow rate. Illustratively, the minimum flow rate is 10, and the plurality of sets of flow rates may be (9.8,9.9, 10, 10.1, 10.2); similarly, the plurality of flow rates may be a maximum flow rate (e.g. 20) in the historical data, and the plurality of flow rate values (e.g. 19.8, 19.9, 20, 20.1, 20.2) are adjusted up and down based on a preset flow rate step (e.g. 0.1) based on the maximum flow rate. Based on the sets of flow rate values corresponding to the minimum flow rate values and the maximum flow rate values.

The flushing results include adsorbent damage and complete regeneration of the adsorbent, which can be indicated by 0 and 1, 0 indicating adsorbent damage or incomplete regeneration, and 1 indicating complete regeneration of the adsorbent. The flushing result may be determined based on the actual result of the adsorbent in production (e.g. after a flushing process of the desorption process). For example, the adsorbent may be evaluated for appearance, color, etc. to determine if it is damaged or if it is fully regenerated.

The flushing result may correspond to each flushing result for each of the plurality of sets of flushing flow rates. Which may be in the form of a vector representation. For example, the aforementioned plural sets of flushing flow rates (S ₁ ，S ₂ ，S ₃ ，S ₄ ，S ₅ ) The flushing result may be a vector (R ₁ ，R ₂ ，R ₃ ，R ₄ ，R ₅ ) Wherein R is ₁ ，R ₂ ，R ₃ ，R ₄ ，R ₅ Respectively correspond to the flushing flow rate S ₁ ，S ₂ ，S ₃ ，S ₄ ，S ₅ Is a rinsing result of (2). Illustratively, the flush result may be (0, 1).

As shown in fig. 6, the controller may input the material information 611 of the adsorbent, the gas information to be treated 612, and the plurality of sets of purge flow rates 613 to the purge model 620, and output a purge result 630 based on the processing of the purge model 620.

In some embodiments, the controller may obtain a plurality of flushing results corresponding to a plurality of groups (e.g., a preset number n is 5) of flow rate values through the flushing model, determine m groups (m is less than or equal to n) of flow rate values corresponding to a complete regeneration of the adsorbent (flushing result is 1), and further determine a minimum value or a maximum value of the m groups of flow rate values based on a sorting (e.g., a descending order or an ascending order) method, and use the minimum value as a minimum flushing flow rate threshold value in a flushing flow rate threshold range, and use the maximum value as a maximum flushing flow rate threshold value in the flushing flow rate threshold range.

Illustratively, for a certain adsorbent and gas to be treated, a plurality of sets of flow rate values (9.8,9.9, 10, 10.1, 10.2) are obtained, where 10 is the minimum in the historical data. By means of the flushing model, a flushing result of (1, 1) is obtained, and the flushing result is that the flow rate values of the groups corresponding to the complete regeneration of the adsorbent (flushing result of 1) are 9.8,9.9, 10, 10.1, 10.2, wherein the minimum value is 9.8, and the minimum flushing flow rate threshold value in the flushing flow rate threshold value range is 9.8.

Similarly, the multiple sets of flow rate values (19.8, 19.9, 20, 20.1, 20.2), wherein 20 is the maximum value in the historical data, and the flushing result (1, 0) is obtained through the flushing model, and then the flushing result is that the adsorbent is completely regenerated (the flushing result is 1), and the sets of flow rate values corresponding to the flushing result are 19.8, 19.9, 20, 20.1, wherein the maximum value is 20.1, and then 20.1 is the maximum flushing flow rate threshold value in the flushing flow rate threshold range. Based on the above procedure, a flushing flow threshold range of [9.8, 20.1] can be obtained. It should be noted that the controller may determine the minimum flush flow rate threshold value and the maximum flush flow rate threshold value through a plurality of rounds of processing based on the flush model. For example, in the foregoing example, since the minimum value 9.8 corresponds to the flushing result that the adsorbent is completely regenerated, a flow rate value smaller than 9.8 may be continuously acquired at a preset flow rate step (e.g., 0.1) for the next round of processing, and thus a smaller minimum flushing flow rate threshold may be obtained, so that the boundary value (e.g., the minimum flushing flow rate threshold) of the flushing flow rate threshold range is more accurate.

In some embodiments, the flush model may be obtained by training multiple sets of second training samples with second tags. Each set of second training samples may include material information for the sample adsorbent, sample gas to be treated information, and multiple sets of sample flush flow rates. Wherein the plurality of sets of second training samples may be obtained based on historical production data. For example, from the history of the flushing process, sets of second training samples are obtained. The second label may be a flushing result corresponding to each set of second training samples. For example, the second label may be determined based on the result of whether the adsorbent corresponding to each set of second training sample data is damaged or whether the adsorbent is completely regenerated during the flushing process in the historical production. Illustratively, the second label may be 0 when the adsorbent is damaged or not fully regenerated; when the adsorbent is fully regenerated, the second label may be 1. The first tag may be labeled manually or the like.

In training the initial flush model, the controller may input a second training sample for each set of samples to the flush model. And outputting a flushing result through the processing of the flushing model. The controller can construct a loss function based on the output of the second tag and the flushing model, and iteratively update the parameters of the flushing model based on the loss function until the preset condition is satisfied, and the trained flushing model is obtained. The preset condition may be that the loss function is smaller than a threshold, converges, or the training period reaches the threshold.

According to some embodiments of the present disclosure, the flushing flow rate threshold range is determined by the flushing model, so that the accuracy of the maximum threshold and the minimum threshold of the acquired flushing flow rate threshold range is higher, and meanwhile, the real-time flushing flow rate is maintained within the flushing flow rate threshold range, which is conducive to complete regeneration of the adsorbent, and the service life of the adsorbent is prolonged.

In some embodiments, the process 700 may be performed by a controller. As shown in fig. 7, the process 700 includes the steps of:

at step 710, the gas pressure of at least one subducting is acquired.

In some embodiments, the gas inlet and/or the gas outlet of the adsorption tower are respectively provided with a plurality of identical sub-pipelines, at least one of the plurality of sub-pipelines is provided with a pneumatic safety valve, and the pneumatic safety valve is configured with a preset opening pressure. The controller may acquire the gas pressure of the at least one sub-conduit via the pressure acquisition device. See fig. 1 and its description for relevant details of pneumatic safety valves and pressure acquisition devices.

In step 720, in response to the gas pressure of at least one of the sub-pipelines being greater than the preset opening pressure, the pneumatic safety valve corresponding to the at least one sub-pipeline is controlled to be opened.

The preset opening pressure may refer to a critical pressure value for controlling the pneumatic safety valve. The preset opening pressure can be set according to actual production requirements when the pneumatic safety valve is installed. When the real-time pressure value in the sub-pipeline provided with the pneumatic safety valve is larger than the preset opening pressure value, the controller can control the pneumatic safety valve to be opened so as to reduce the pressure in the adsorption tower, and simultaneously enlarge the number of channels (sub-pipelines) through which the gas flows and slow down the flushing flow rate of the gas.

And step 730, controlling the pneumatic safety valve corresponding to the at least one sub-pipeline to be closed in response to the gas pressure of the at least one sub-pipeline being smaller than the preset opening pressure.

The controller may control the pneumatic relief valve to close as the pressure in the sub-line decreases to a preset cracking pressure. It will be appreciated that when the gas pressure in the adsorption column is small, the number of channels (subducting) through which the gas flows can be reduced by controlling the pneumatic relief valve of the subducting to close, so that the low pressure, low flow rate gas becomes more concentrated, helping to maintain pressure and gas flow rate, avoiding continuous reduction of pressure or flushing flow rate.

In some embodiments, the pneumatic relief valves include a first number of first pneumatic relief valves and a second number of second pneumatic relief valves.

The preset opening pressures of the first pneumatic relief valve and the second pneumatic relief valve may be different. The first pneumatic safety valve may be a pneumatic safety valve provided with a higher preset opening pressure. The second pneumatic safety valve may be assigned a pneumatic safety valve provided with a lower preset opening pressure. The first pneumatic safety valve and the second pneumatic safety valve are configured with different preset opening pressures, so that the gas pressure in the adsorption tower can be adjusted in different rising stages in a targeted manner to buffer the rising of the pressure or the gas flow rate.

The preset pressure correlation corresponding to the first pneumatic safety valve and the second pneumatic safety valve is related to a preset flushing flow rate threshold range. In some embodiments, the preset opening pressure of the first pneumatic safety valve may be determined based on the corresponding gas pressure at the maximum flush flow rate threshold. The preset opening pressure of the second pneumatic relief valve may be determined based on the pneumatic pressure corresponding to the minimum flush flow rate threshold. Wherein the preset flush flow rate threshold range may be determined based on a flush model. See fig. 6 and its description for relevant content of the flush flow rate threshold range and flush model.

The first number may refer to the number of sub-conduits provided with the first pneumatic safety valve. The second number may refer to the number of subducting provided with a second pneumatic safety valve.

In some embodiments, the sum of the first number and the second number does not exceed 20% of the number of all subducting.

According to some embodiments of the present disclosure, the change of the gas pressure and the flow rate in the adsorption tower can be adjusted through the pneumatic safety valve, so that the influence of the gas scouring of the higher flow rate to which the adsorbent is subjected is slowed, the protection of the adsorbent is facilitated, and the influence of the excessively high gas flow rate on the adsorption tower and the pipeline can be reduced.

It should be noted that the above description of the flow is only for the purpose of illustration and description, and does not limit the application scope of the present specification. Various modifications and changes to the flow may be made by those skilled in the art under the guidance of this specification. However, such modifications and variations are still within the scope of the present description.

One of the embodiments of the present disclosure provides a computer-readable storage medium storing computer instructions that, when read by a computer in the storage medium, perform the aforementioned method for adjusting the adsorption adaptive adjustment system of the adsorption tower.

While the basic concepts have been described above, it will be apparent to those skilled in the art that the foregoing detailed disclosure is by way of example only and is not intended to be limiting. Although not explicitly described herein, various modifications, improvements, and adaptations to the present disclosure may occur to one skilled in the art. Such modifications, improvements, and modifications are intended to be suggested within this specification, and therefore, such modifications, improvements, and modifications are intended to be included within the spirit and scope of the exemplary embodiments of the present invention.

Meanwhile, the specification uses specific words to describe the embodiments of the specification. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the present description. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the present description may be combined as suitable.

Furthermore, the order in which the elements and sequences are processed, the use of numerical letters, or other designations in the description are not intended to limit the order in which the processes and methods of the description are performed unless explicitly recited in the claims. While certain presently useful inventive embodiments have been discussed in the foregoing disclosure, by way of various examples, it is to be understood that such details are merely illustrative and that the appended claims are not limited to the disclosed embodiments, but, on the contrary, are intended to cover all modifications and equivalent arrangements included within the spirit and scope of the embodiments of the present disclosure. For example, while the system components described above may be implemented by hardware devices, they may also be implemented solely by software solutions, such as installing the described system on an existing server or mobile device.

Likewise, it should be noted that in order to simplify the presentation disclosed in this specification and thereby aid in understanding one or more inventive embodiments, various features are sometimes grouped together in a single embodiment, figure, or description thereof. This method of disclosure, however, is not intended to imply that more features than are presented in the claims are required for the present description. Indeed, less than all of the features of a single embodiment disclosed above.

In some embodiments, numbers describing the components, number of attributes are used, it being understood that such numbers being used in the description of embodiments are modified in some examples by the modifier "about," approximately, "or" substantially. Unless otherwise indicated, "about," "approximately," or "substantially" indicate that the number allows for a 20% variation. Accordingly, in some embodiments, numerical parameters set forth in the specification and claims are approximations that may vary depending upon the desired properties sought to be obtained by the individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and employ a method for preserving the general number of digits. Although the numerical ranges and parameters set forth herein are approximations that may be employed in some embodiments to confirm the breadth of the range, in particular embodiments, the setting of such numerical values is as precise as possible.

Each patent, patent application publication, and other material, such as articles, books, specifications, publications, documents, etc., referred to in this specification is incorporated herein by reference in its entirety. Except for application history documents that are inconsistent or conflicting with the content of this specification, documents that are currently or later attached to this specification in which the broadest scope of the claims to this specification is limited are also. It is noted that, if the description, definition, and/or use of a term in an attached material in this specification does not conform to or conflict with what is described in this specification, the description, definition, and/or use of the term in this specification controls.

Finally, it should be understood that the embodiments described in this specification are merely illustrative of the principles of the embodiments of this specification. Other variations are possible within the scope of this description. Thus, by way of example, and not limitation, alternative configurations of embodiments of the present specification may be considered as consistent with the teachings of the present specification. Accordingly, the embodiments of the present specification are not limited to only the embodiments explicitly described and depicted in the present specification.

Claims

1. An adsorption self-adaptive adjusting system of an adsorption tower, wherein the system comprises at least two adsorption towers, a connecting pipeline, a control valve and a controller; the adsorption tower comprises adsorption treatment and desorption treatment;

Each adsorption tower comprises an air inlet and an air outlet, and the air inlet is connected with an air inlet pipeline of the adsorption tower; the air outlet is connected with an air outlet pipeline of the adsorption tower; the air inlet and the air outlet are honeycomb-shaped;

the connecting pipelines comprise a first connecting pipeline and a second connecting pipeline, and the first connecting pipeline is used for connecting air inlet pipelines of the two adsorption towers; the second connecting pipeline is used for connecting the air outlet pipelines of the two adsorption towers;

the control valve is arranged in the connecting pipeline and is used for adjusting the gas pressure and/or the gas flushing flow rate in each adsorption tower; the first connecting pipeline and/or the second connecting pipeline comprises a first sub-pipeline and a second sub-pipeline which are arranged in parallel; the control valve comprises a regulating valve, the regulating valve comprises a first regulating valve and a second regulating valve, the first regulating valve is arranged in the first sub-pipeline, and the second regulating valve is arranged in the second sub-pipeline;

the controller is used for:

determining a target opening degree of the control valve based on gas related data in each adsorption tower, wherein the gas related data comprise gas pressure data and gas flow rate data, and the target opening degree comprises a first opening degree corresponding to the first regulating valve and a second opening degree corresponding to the second regulating valve;

Adjusting the opening of the control valve based on the target opening;

the controller is further configured to:

acquiring a preset pressure change rate, wherein the preset pressure change rate comprises an adsorption pressure change rate corresponding to the adsorption treatment and a desorption pressure change rate corresponding to the desorption treatment;

predicting a plurality of predicted pressure change rates based on the pressure change rate prediction model; the input of the pressure change rate prediction model comprises the pressure difference of the connected adsorption towers, the first opening, the second opening, raw gas data, pipeline data and adsorption tower data, and the output is the pressure change rate;

determining a target adsorption opening degree during the adsorption treatment and a desorption opening degree during the desorption treatment based on the first opening degree and the second opening degree corresponding to a pressure change rate predicted value closest to a preset pressure change rate;

adjusting the first regulating valve and/or the second regulating valve based on the target adsorption opening and the desorption opening;

the controller is further configured to:

setting a plurality of groups of adjusting valve openings to perform fault checking on the adjusting valves in response to the first difference value being larger than a second preset threshold, wherein the adjusting directions of the first opening and the second opening in each group of valve openings are opposite; the first difference value refers to a deviation value of the actual pressure change rate and the predicted pressure change rate under the current target opening; the second preset threshold value represents the deviation of the first difference value;

In response to no change between a plurality of second differential values, both the first regulating valve and the second regulating valve fail; the second difference value represents the difference value between the real-time pressure change rate and the predicted pressure change rate when the fault is detected through the opening of the plurality of groups of regulating valves;

resetting the plurality of sets of adjustment valve openings in response to the second difference value gradually increasing to cause the opening change directions of the first adjustment valve and the second adjustment valve to be exchanged;

determining that one of the regulator valves is malfunctioning and the other regulator valve is normal in response to the second differential value gradually decreasing to be the same as the predicted pressure change rate;

and responding to the failure of one of the regulating valves, locking the opening of the failed regulating valve to the current opening, and regulating the opening of the other regulating valve through a control valve instruction.

2. The system of claim 1, the adsorption column further comprising:

the pressure acquisition device is used for acquiring real-time pressure data in each adsorption tower;

the controller is further configured to:

Acquiring real-time pressure data of the pressure acquisition device;

and determining the first opening degree and/or the second opening degree based on the real-time pressure data.

3. The system of claim 1, the adsorption column further comprising:

the flow rate detection device is used for acquiring the real-time flushing flow rate of the gas in each adsorption tower; the target opening is also related to the real-time flushing flow rate of the gas in the adsorption tower;

the controller is further configured to:

and determining the target opening of the control valve based on the acquired real-time flushing flow rate and a preset flushing flow rate threshold range.

4. The system of claim 1, wherein the gas inlet and the gas outlet of the adsorption tower are respectively provided with a plurality of sub-pipelines, and the sub-pipelines are intersected at the junction of the gas inlet pipeline or the gas outlet pipeline corresponding to the adsorption tower; at least one of the plurality of sub-pipelines is provided with a pneumatic safety valve, and the pneumatic safety valve is configured with a preset opening pressure;

the controller is further configured to:

acquiring the gas pressure of the at least one sub-pipeline;

controlling the pneumatic safety valve corresponding to the at least one sub-pipeline to be opened in response to the gas pressure of the at least one sub-pipeline being greater than the preset opening pressure;

And controlling the pneumatic safety valve corresponding to the at least one sub-pipeline to be closed in response to the fact that the gas pressure of the at least one sub-pipeline is smaller than the preset opening pressure.

5. An adjusting method of an adsorption self-adaptive adjusting system of an adsorption tower comprises at least two adsorption towers, a connecting pipeline, a control valve and a controller; the adsorption tower comprises adsorption treatment and desorption treatment; each adsorption tower comprises an air inlet and an air outlet, and the air inlet is connected with an air inlet pipeline of the adsorption tower; the air outlet is connected with an air outlet pipeline of the adsorption tower; the air inlet and the air outlet are honeycomb-shaped; the connecting pipelines comprise a first connecting pipeline and a second connecting pipeline, and the first connecting pipeline is used for connecting air inlet pipelines of the two adsorption towers; the second connecting pipeline is used for connecting the air outlet pipelines of the two adsorption towers; the control valve is arranged in the connecting pipeline and is used for adjusting the gas pressure and/or the gas flushing flow rate in each adsorption tower; the first connecting pipeline and/or the second connecting pipeline comprises a first sub-pipeline and a second sub-pipeline which are arranged in parallel; the control valve comprises a regulating valve, the regulating valve comprises a first regulating valve and a second regulating valve, the first regulating valve is arranged in the first sub-pipeline, and the second regulating valve is arranged in the second sub-pipeline; the method is performed by the controller, the method comprising:

adjusting the opening of the control valve based on the target opening;

6. The method according to claim 5,

the determining the target opening degree of the control valve includes:

based on a pressure acquisition device, acquiring real-time pressure data in each adsorption tower;

and determining the first opening degree and/or the second opening degree based on the real-time pressure data and a preset pressure change rate.

7. The method of claim 5, the target opening further being related to a real-time purge flow rate of gas within the adsorption column;

the determining the target opening of the control valve further includes:

acquiring the real-time flushing flow rate of each adsorption tower through a flow rate detection device;

and determining the target opening of the control valve based on the real-time flushing flow rate and a preset flushing flow rate threshold range.

8. The method according to claim 5, wherein the gas inlet and/or the gas outlet of the adsorption tower are/is provided with a plurality of identical sub-pipelines, at least one of the plurality of sub-pipelines is provided with a pneumatic safety valve configured with a preset opening pressure;

The method further comprises the steps of:

acquiring the gas pressure of the at least one sub-pipeline;

9. A computer-readable storage medium storing computer instructions that, when read by the computer, perform the adsorption tower adsorption adaptive adjustment method according to any one of claims 5 to 8.