CN115646911A - A compressor off-line cleaning system - Google Patents

Abstract

The invention relates to an off-line cleaning system for a compressor, which includes a state confirmation module, a cleaning module, a liquid addition module, a liquid storage module and a controller; the invention is based on existing software programming and certain hardware transformation, and cleans the compressor off-line The independent panel operation tasks are integrated into sequence control, and the execution time of the sequence control program is time-effectively matched with the dosing amount of the local cleaning solution, so as to realize the optimized off-line cleaning process of the compressor. Compared with the prior art, the present invention has the advantages of high degree of automation, simple and convenient operation, low labor cost and the like.

Description

A compressor off-line cleaning system

technical field

The invention relates to the technical field of compressor equipment, in particular to an off-line cleaning system for a compressor.

Background technique

As one of the important parts of the gas turbine, the compressor's main function is to provide pressurized clean air for the gas turbine. Due to the long-term operation or the environment with high air pollution, although the air inhaled by the compressor is filtered by the filter system, the dust and tiny particles in the air are easy to accumulate on the moving blades of the compressor and form salt accumulation. Excessive fouling or salt corrosion will change the rotor blade flow path of the compressor, reduce the compression ratio and working efficiency of the compressor, and even destroy the dynamic balance of the compressor blades. To deal with this situation, the compressor should be cleaned regularly. There are two cleaning methods. Offline cleaning should be used for relatively large pollution levels, and online cleaning should be used for general pollution levels.

The offline cleaning process of the entire compressor requires the cooperation of at least one panel operator and one on-site operator. This offline cleaning method has the following disadvantages:

1) The panel operator needs to manually confirm the various conditions of the compressor before offline cleaning, manually execute the cleaning program and confirm each intermediate state and related systems after the manual recommissioning cleaning.

2) On-site operators need to manually start and stop, replenish desalted water for cleaning, and manually switch flushing nozzles according to the operator's instructions on the panel. In addition, these on-site operation locations are distributed far away, and the on-site operators need to go back and forth.

3) The panel operator needs to reserve the operating time of the local operator to avoid the completion of the off-line cleaning program and the filling of the compressor cleaning fluid.

4) When the liquid level of the water washing tank of the compressor is too low, the local operator needs to reserve a certain amount of time to replenish clean water to a certain liquid level in time, so as to avoid pump emptying during the water washing of the compressor.

To sum up, the existing off-line cleaning procedures for compressors have defects such as low degree of automation, high labor costs, and complicated operations.

Contents of the invention

The purpose of the present invention is to provide a compressor off-line cleaning system in order to overcome the above-mentioned defects in the prior art, which integrates the independent panel operation tasks of the off-line compressor cleaning into a sequence control task, and integrates the execution time of the sequence control program with the on-site The dosing amount of the cleaning solution is time-matched to achieve an optimized off-line cleaning process.

The purpose of the present invention can be achieved through the following technical solutions:

An off-line cleaning system for a compressor, including a status confirmation module, a cleaning module, a liquid addition module, a liquid storage module and a controller;

The cleaning module includes a washing box, and the washing box is connected with cleaning components through a main connecting pipe;

The cleaning module, liquid adding module and liquid storage module are connected in sequence;

The liquid addition module is connected to a controller;

The state confirmation module is connected with the compressor and the controller respectively.

Further, the water washing tank is provided with a first sensor and a second sensor;

The controller is respectively connected to the first sensor and the second sensor;

The first sensor is arranged on the upper part of the washing tank, and the first sensor is used to detect the high liquid level of the washing tank;

The second sensor is arranged at the lower part of the washing tank, and the second sensor is used to detect the low liquid level of the washing tank;

The controller is also connected with a high liquid level switch and a low liquid level switch respectively.

Further, the cleaning component includes a cleaning nozzle, and the cleaning nozzle includes a jet nozzle and an atomizing nozzle.

Further, the cleaning component includes a nozzle switching solenoid valve, and the nozzle switching solenoid valve is connected with a controller;

The nozzle switching solenoid valve includes a liquid inlet and a plurality of liquid outlets;

The liquid inlet is connected to the main connecting pipe, and the other end of the main connecting pipe is connected to the washing tank;

The multiple liquid outlets are connected to secondary connecting pipes, and each secondary connecting pipe is connected to different cleaning nozzles.

Further, the cleaning module includes a jet pump, the inlet of the jet pump is connected to the washing tank, and the outlet of the jet pump is connected to the main connecting pipe.

Further, the liquid storage module includes a medicine storage tank and a demineralized water storage tank;

The medicine storage box is connected to the washing box through a first connecting pipe;

The desalinated water storage tank is connected with the washing tank through a second connecting pipe.

Further, the liquid adding module includes a medicine adding solenoid valve; the medicine adding solenoid valve is installed on the first connecting pipe, and the medicine adding solenoid valve is connected with the controller.

Further, the liquid adding module includes a water replenishing solenoid valve, the water replenishing solenoid valve is installed on the second connecting pipe, and the water replenishing solenoid valve is connected with the controller.

Further, the state confirmation module includes a processor and a plurality of detection devices, and the detection devices are used to detect the state parameters of the compressor.

Further, the system also includes a timer and an alarm module, and the alarm module and the timer are respectively connected with the controller.

Compared with the prior art, the present invention has the following beneficial effects:

1. The present invention controls the cleaning process of the entire compressor through the state confirmation module and the controller, realizes the automation of the off-line cleaning procedure of the compressor through sequential control, optimizes the entire operation process, and is easy to operate during the cleaning process, with a high degree of automation and optimal The compressor off-line cleaning effect.

2. The present invention controls the whole process of off-line cleaning of the compressor through the controller, which reduces the daily workload of panel personnel and on-site operators, not only avoids misoperation by personnel, but also reduces labor costs.

3. The present invention is based on existing software programming and certain hardware transformation, the design cost and fabrication cost are controllable, and the practicability is high.

Description of drawings

Fig. 1 is a logical schematic diagram of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

As shown in Figure 1, a compressor off-line cleaning system provided in this embodiment includes a status confirmation module, a cleaning module, a liquid addition module, a liquid storage module and a controller; the cleaning module includes a water washing box, which is connected through the main The pipe is connected with a cleaning part; the cleaning module, the liquid addition module and the liquid storage module are connected in sequence; the liquid addition module is connected with the controller; the status confirmation module is respectively connected with the compressor and the controller.

The status confirmation module is respectively connected with the compressor and the controller, and is equipped with a processor and multiple detection devices; the detection devices include a device for temperature detection, a device for detecting the baffle switch, and a device for detecting the operation of the compressor. The time device, and other commonly used devices for detecting the state parameters of the compressor, in the specific implementation, the signals of multiple sensors and switching elements can be connected to the DCS system, and the DCS system can be used as the processor to confirm the status of the compressor. state, to judge whether the compressor meets the cleaning requirements. Or use a single-chip microcomputer, microprocessor, etc. to verify whether the actual state parameters of the compressor meet the cleaning conditions of the compressor through digital circuits such as comparison circuits and logic judgment circuits.

At the same time, this system also includes an alarm module. During the program design, accidental interruption, program alarm, and monitoring of the shaft speed are taken into account. The status confirmation module monitors the working conditions. Alarm is performed, and the corresponding program is interrupted at the same time; during specific implementation, devices such as sound and light alarms can be used for alarming.

The cleaning module, liquid adding module and liquid storage module are connected in sequence;

The cleaning module includes a washing box, and the washing box is provided with a first sensor and a second sensor; the controller is respectively connected to the first sensor and the second sensor; the first sensor is arranged on the side surface of the upper part of the washing box for detecting High liquid level; the second sensor is arranged on the side surface of the lower part of the water washing tank for detecting the low liquid level of the water washing tank; the controller is also connected with a high liquid level switch and a low liquid level switch respectively. Set the high level switch to prevent the wash tank from overflowing, and set the low level switch to prevent emptying the pump.

During specific work, if the second sensor detects liquid contact, that is, the liquid in the washing tank reaches the preset low liquid level, the second sensor sends the detection signal to the controller, and the controller controls the low liquid level switch to output a low level signal , and turn on the liquid delivery function of the washing tank; if the second sensor detects no liquid contact, that is, the liquid in the washing tank is lower than the low liquid level, then the second sensor sends a detection signal to the controller, and the controller controls the low liquid level The switch outputs a high-level signal, and closes the liquid delivery function of the washing box, and at the same time turns on the water inlet function of the washing box, that is, opens the replenishment solenoid valve to replenish desalinated water. If the first sensor detects liquid contact, that is, the liquid reaches the high liquid level, the first sensor sends its detection signal to the controller, and the controller controls the high liquid level switch to output a high level signal, and closes the water inlet function of the washing tank ;

The washing tank is connected with a cleaning part through the main connecting pipe; the cleaning part includes a nozzle switching solenoid valve, and the nozzle switching solenoid valve is connected to the controller; the nozzle switching solenoid valve includes a liquid inlet and a plurality of liquid outlets; the liquid inlet and the main connecting pipe The other end of the main connecting pipe is connected to the washing tank; multiple liquid outlets are equipped with secondary connecting pipes, and each secondary connecting pipe is connected to different cleaning nozzles.

In this embodiment, the cleaning nozzles include jet nozzles and atomizing nozzles;

In this embodiment, there are two liquid outlets on the nozzle switching solenoid valve, which are the first liquid outlet and the second liquid outlet. In other embodiments, different numbers of liquid outlets can be set according to different requirements. mouth;

The jet nozzle is connected to the first liquid outlet through the connecting pipe, and the atomizing nozzle is connected to the second liquid outlet through the connecting pipe; The corresponding valve is recorded as the atomizing nozzle solenoid valve.

During specific work, the jet nozzle and the atomizing nozzle are respectively inserted into the cleaning liquid inlet of the compressor, and the controller controls the movement of the valve body in the nozzle solenoid valve to open or close different cleaning nozzles.

The water washing box is provided with a jet pump. In this embodiment, the jet pump is connected to a relay and then connected to the controller. The dosing solenoid valve is switched on or off by the controller to control the flow of liquid in the water washing box. delivery. The washing box is also provided with a discharge valve and an air exhaust valve. The discharge valve is connected to the ditch through a hose to discharge excess liquid in the water washing box, and the air exhaust valve is used to discharge excess gas.

The liquid storage module includes a medicine storage tank and a desalinated water storage tank; the medicine storage tank is connected to the water washing tank through a first connecting pipe; the desalinated water storage tank is connected to the water washing tank through a second connecting pipe. The medicine storage tank is used for storing the washing liquid, and the desalinated water storage tank is used for storing the desalinated water.

The liquid adding module includes a medicine adding solenoid valve, which is installed on the first connecting pipe, and the medicine adding solenoid valve is connected with the controller. The controller controls the delivery of the washing solution in the medicine storage box through the medicine adding electromagnetic valve, and when the medicine adding electromagnetic valve is connected, the washing medicine is delivered to the water washing box.

The liquid addition module also includes a water replenishment solenoid valve, which is installed on the second connecting pipe and connected to the controller. The switch of the water replenishment solenoid valve is controlled by the controller to control the delivery of the liquid in the desalinated water storage tank, and the water replenishment When the solenoid valve is turned on, the desalted water is sent to the washing tank.

In this embodiment, the system includes a timer, which is connected to the controller, and the timer is used to calculate the time that needs to be delayed during specific implementation.

This embodiment is based on the Siemens T3000 system, and the controller is used to realize the control of the off-line cleaning system of the compressor. Siemens T3000 system is the operating software of the distributed control system of the unit unit. This software system has a certain degree of openness in program design. It can integrate the independent panel operation tasks of off-line compressor cleaning into sequence control through programming, and the execution of the sequence control program The time is matched with the dosing amount of the in-situ cleaning solution, so as to realize the optimized off-line cleaning process.

In this embodiment, the specific use of the compressor offline cleaning system provided by the present invention based on the Siemens T3000 system includes the following steps:

1. The status confirmation module confirms the preparatory work before cleaning the compressor

Through the application program deployed in the status confirmation module, combined with the compressor data measured by multiple sensors and detection devices, to confirm the status of the compressor and judge whether the compressor meets the cleaning requirements, including the following steps:

(1) Confirm that the gas turbine cranking operation time is greater than 6 hours, the gas turbine cranking engagement signal output is 1 and the ambient temperature is greater than 5°C;

(2) Confirm that the frequency conversion device is started, the excitation device is in standby state and there is no blocking or fault signal;

(3) Check that the cleaning module, dosing module and controller are normal, especially that the nozzle switching solenoid valve and water replenishing solenoid valve have no faults, and that there is no high or low liquid level alarm in the water washing tank; confirm that the opening of the dosing solenoid valve in the dosing module The hose connection with the washing tank is firm, and the opening of the jet pump on the washing tank is firmly connected with the main connecting pipe.

(4) Confirm that each discharge valve of the gas turbine body is opened, and confirm that the discharge valve from the water washing tank to the ditch and the air exhaust valve are opened;

(5) Put in the IGV power supply sub-ring, open the IGV opening to 100%, and confirm that the IGV opening is 100%;

(6) Confirm that the intake baffle of the compressor is open, stop the inlet dryer, and confirm that the inlet dryer is disabled;

(7) Confirm that the "release" condition of the waste heat boiler is met, open the chimney damper, and confirm that the chimney damper is opened.

(8) Switch "SGC GAS TURBINE", "UNIT COORDINATION" and "SFC HRSG PURGE" from ON to OFF.

(9) Confirm that the "ON" signal of "EXCITATION" is "1", the signals of "SFC 1RDY" and "SFC 3RDY" are "1", and the SFC has no blocking or fault signal.

2. Soaking work

Professional technicians deploy control programs in the controller according to different needs. This embodiment uses a preferred control method as an illustration to realize the soaking work of the compressor, including the following steps:

(1) The controller controls the mixed cleaning solution, mixes the cleaning solution with desalted water at a ratio of 1:4, that is, opens the dosing solenoid valve and the water replenishing solenoid valve at a ratio of 1:4 to make the medicine storage box and the The desalinated water storage tank adds lotion and desalinated water to the washing tank until the mixed cleaning solution reaches the high level of the washing tank, completes the deployment of the cleaning solution, and then closes the dosing solenoid valve and water replenishment solenoid valve;

(2) Confirm that the water inlet valve of the spray nozzle (SPRAY NOZZEL) is closed, open the water inlet valve of the compressor jet nozzle (JETNOZZEL), and confirm that the water inlet valve of the compressor jet nozzle (JET NOZZEL) is open;

(3) Start the jet pump. At this time, the on-site personnel need to check that the water level of the cleaning water tank has dropped normally, and that there is no leakage at the interface of the cleaning liquid delivery pipes;

(4) Delay the jet pump by the timer for X minutes or the low liquid level switch sends out a signal "1", close the water inlet valve of the jet nozzle (JET NOZZEL) of the compressor, and confirm that the jet nozzle (JET NOZZEL) of the compressor is inflow The valve is closed; during specific implementation, the time X that needs to be delayed is formulated by professional technicians in the field according to different requirements;

(5) Open the water inlet valve of the spray nozzle (SPRAY NOZZEL), and confirm that the water inlet valve of the spray nozzle (SPRAY NOZZEL) is open;

(6) Stop gas turbine cranking, and confirm that the gas turbine cranking engagement signal is "0";

(7) Set SFC to switch from UNIT START to COMPR WASH mode, and use SFC PREPARE.

Start the injection pump;

(8) After confirming that the prepare signal is "1", execute the mode [2], that is, the panel personnel confirm to start the gas turbine, and the SFC exits after increasing the speed to 700-800rpm;

(9) Deactivate the jet pump by delaying the timer for X minutes or sending a signal "1" from the low liquid level switch.

(10) Close the water inlet valve of the spray nozzle (SPRAY NOZZEL), and open the replenishment solenoid valve to replenish desalted water into the washing tank;

(11) Confirm that the water inlet valve of the spray nozzle (SPRAY NOZZEL) is closed;

(12) When the gas turbine cranking speed is less than 2.5Hz, start the gas turbine cranking program.

3. Rinsing work

Professional technicians deploy control programs in the controller according to different needs. This embodiment uses a preferred control method as an illustration to realize the rinsing work of the compressor, including the following steps:

(1) Delay X minutes to close the replenishment solenoid valve, or close the replenishment solenoid valve when the high liquid level switch signal of the washing tank outputs "1";

(2) Confirm that the water inlet valve of the jet nozzle (JET NOZZEL) of the compressor is closed, and open the water inlet valve of the spray nozzle (SPRAYNOZZEL);

(3) Confirm that the water inlet valve of the spray nozzle (SPRAY NOZZEL) is open;

(4) Check the gas turbine cranking engagement signal, if the signal is "0", it is confirmed that the gas turbine cranking is disabled, and if the signal is "1", the gas turbine cranking is disabled;

(5) Check that SFC is in COMPR WASH mode, and use SFC PREPARE;

(6) After confirming that the prepare signal is "1", execute the mode [2], that is, the panel personnel check that the SFC is automatically put into use, and the speed rises to 700-800 rpm, and then the SFC exits;

(7) When the gas turbine cranking speed is less than 2Hz, start the gas turbine cranking program;

(8) Delay for X minutes or the low liquid level switch sends out a signal "1" to deactivate the jet pump and close the water inlet valve of the spray nozzle (SPRAYNOZZEL).

(9) Confirm that the water inlet valve of the spray nozzle (SPRAY NOZZEL) and the water inlet valve of the jet nozzle (JET NOZZEL) are in the closed position.

(10) The local operator closes all drain valves when there is no water flowing out of the water collection tank.

4. Return to service

(1) Switch the SFC operation mode from COMPR WASH to UNIT START;

(2) "SGC GAS TURBINE", "UNIT COORDINATION" and "SFC HRSG PURGE" are switched from OFF to ON;

(3) Close the IGV to 11%, and exit the IGV power supply sub-ring;

(4) Use the drying device.

It can be understood that the application program deployed inside the processor in this embodiment is an existing technology, which can automatically process the measured compressor data. At the same time, the programming software carried inside the controller is also an existing technology. It can realize corresponding functions such as controlling the on-off of the dosing solenoid valve and the water replenishment solenoid valve, and will not be repeated here.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can easily think of various equivalents within the technical scope disclosed in the present invention. Modifications or replacements shall all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. A compressor off-line cleaning system, characterized in that it includes a status confirmation module, a cleaning module, a liquid addition module, a liquid storage module and a controller; The cleaning module includes a washing box, and the washing box is connected with cleaning components through a main connecting pipe; The cleaning module, liquid adding module and liquid storage module are connected in sequence; The liquid addition module is connected to a controller; The state confirmation module is connected with the compressor and the controller respectively. 2. A kind of compressor off-line cleaning system according to claim 1, characterized in that a first sensor and a second sensor are provided on the washing tank; The controller is respectively connected to the first sensor and the second sensor; The first sensor is arranged on the upper part of the washing tank, and the first sensor is used to detect the high liquid level of the washing tank; The second sensor is arranged at the lower part of the washing tank, and the second sensor is used to detect the low liquid level of the washing tank; The controller is also connected with a high liquid level switch and a low liquid level switch respectively. 3 . The off-line cleaning system for a compressor according to claim 1 , wherein the cleaning component includes a cleaning nozzle, and the cleaning nozzle includes a jet nozzle and an atomizing nozzle. 4 . 4. A compressor off-line cleaning system according to claim 3, wherein the cleaning component includes a nozzle switching solenoid valve, and the nozzle switching solenoid valve is connected to a controller; The nozzle switching solenoid valve includes a liquid inlet and a plurality of liquid outlets; The liquid inlet is connected to the main connecting pipe, and the other end of the main connecting pipe is connected to the washing tank; The multiple liquid outlets are connected to secondary connecting pipes, and each secondary connecting pipe is connected to different cleaning nozzles. 5 . The off-line cleaning system for a compressor according to claim 1 , wherein the cleaning module includes a jet pump, the inlet of the jet pump is connected to the washing tank, and the outlet of the jet pump is connected to the main connecting pipe. 6. A compressor off-line cleaning system according to claim 1, wherein the liquid storage module includes a medicine storage tank and a desalination water storage tank; The medicine storage box is connected to the washing box through a first connecting pipe; The desalinated water storage tank is connected with the washing tank through a second connecting pipe. 7. A compressor off-line cleaning system according to claim 6, wherein the liquid addition module includes a dosing solenoid valve; the dosing solenoid valve is installed on the first connecting pipe, and the dosing The solenoid valve is connected with the controller. 8. An off-line cleaning system for a compressor according to claim 6, wherein the liquid addition module includes a water replenishment solenoid valve, the water replenishment solenoid valve is installed on the second connecting pipe, and the water replenishment solenoid valve is connected to the The controller is connected. 9 . The off-line cleaning system for a compressor according to claim 1 , wherein the state confirmation module includes a processor and a plurality of detection devices, and the detection devices are used to detect state parameters of the compressor. 10. The off-line cleaning system for a compressor according to claim 1, further comprising an alarm module connected to the controller.

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