CN112360848B - A bladeless aerodynamic flow guidance and rectification system - Google Patents
A bladeless aerodynamic flow guidance and rectification system Download PDFInfo
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- CN112360848B CN112360848B CN202011314053.2A CN202011314053A CN112360848B CN 112360848 B CN112360848 B CN 112360848B CN 202011314053 A CN202011314053 A CN 202011314053A CN 112360848 B CN112360848 B CN 112360848B
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- flue
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/0095—Influencing flow of fluids by means of injecting jet pulses of fluid wherein the injected fluid is taken from the fluid and re-injected again, e.g. synthetic jet actuators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/02—Influencing flow of fluids in pipes or conduits
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Measuring Volume Flow (AREA)
- Flow Control (AREA)
Abstract
A vane-free pneumatic flow guiding and rectifying system comprises a plurality of I-type nozzle groups arranged on the inner arc side of a flue and a plurality of II-type nozzle groups arranged on the inner arc side of the flue, wherein the I-type nozzle groups and the II-type nozzle groups are connected with a compressed air tank, and monitoring instrument groups are arranged at the air flow inlet and the air flow outlet in the flue. When the bladeless pneumatic flow guiding and rectifying system is specifically operated, the air quantity entering the nozzle can be timely adjusted according to the resistance data fed back in real time, so that the purpose of optimizing the flow field is realized. Compared with the conventional flow guide, rectifying plate or blade design, after the blade is canceled, the construction is convenient and concise, the appearance of a flue is not required to be modified, a large amount of materials and construction period are saved, the real-time adjustability of the flow field optimization is realized, the flow field optimization effect is more similar to the numerical simulation result, and the flow field optimization efficiency is greatly improved.
Description
Technical Field
The invention belongs to the field of flow field fine control, resistance reduction and energy saving, and particularly relates to a bladeless pneumatic flow guiding and rectifying system.
Background
In order to optimize the flow field of the pulverized coal pipeline of the thermal power plant and reduce the resistance, a mode of adding a plurality of groups of flow guiding and equalizing plates or blades with different forms in the pipeline is generally adopted. However, the arrangement of the flow guiding and equalizing plates is often limited by the internal structure of the flue, so that the flow guiding and equalizing effects are affected, the numerical simulation result is deviated, and especially in the low-temperature section flue gas duct, the two sides of the blade are required to be subjected to corrosion prevention treatment, the construction difficulty is high, and the material consumption is high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a bladeless pneumatic flow guiding and rectifying system which can effectively improve flow guiding and rectifying precision and save materials.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a vane-free pneumatic flow guiding and rectifying system comprises a plurality of I-type nozzle groups arranged on the inner arc side of a flue and a plurality of II-type nozzle groups arranged on the inner arc side of the flue, wherein the I-type nozzle groups and the II-type nozzle groups are connected with a compressed air tank, and monitoring instrument groups are arranged at the air flow inlet and the air flow outlet in the flue.
The invention is further improved in that the group of type I nozzles and the group of type II nozzles are connected to a compressed air tank via a pipe 7.
The invention is further improved in that a control valve group 3 is arranged on a pipeline between the I-type nozzle group and the compressed air tank, and a control valve group 3 is arranged on a pipeline between the I-type nozzle group and the II-type nozzle group 5.
A further improvement of the present invention is that the group of I-type nozzles comprises a plurality of groups of convergent nozzles.
A further improvement of the present invention is that the group of type II nozzles comprises several groups of diverging nozzles.
A further development of the invention is that the control valve group comprises several manual, pneumatic or electric valves.
The invention is further improved in that the monitoring instrument cluster comprises a plurality of pressure and differential pressure transmitters.
A further development of the invention is that the compressed air tanks are provided in a plurality and are arranged outside the flue.
Compared with the prior art, the invention has the following beneficial effects:
According to the invention, the I-type nozzle group, the II-type nozzle group and the monitoring instrument group are arranged, and the resistance value measured in real time by the monitoring instrument group is used for adjusting the control valve group to achieve the purpose of optimizing the flow field by adjusting the gas flow rates of the high-speed area and the low-speed area to proper values. When the bladeless pneumatic flow guiding and rectifying system is specifically operated, the air quantity entering the nozzle can be timely adjusted according to the resistance data fed back in real time, so that the purpose of optimizing the flow field is realized. Compared with the conventional flow guide, rectifying plate or blade design, after the blade is canceled, the construction is convenient and concise, the appearance of a flue is not required to be modified, a large amount of materials and construction period are saved, the real-time adjustability of the flow field optimization is realized, the flow field optimization effect is more similar to the numerical simulation result, and the flow field optimization efficiency is greatly improved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
The device comprises a flue 1, a compressed air tank 2, a control valve group 3, an I-type nozzle group 4, an II-type nozzle group 5, a monitoring instrument group 6 and a pipeline 7.
Detailed Description
The invention is described in further detail below with reference to the attached drawing figures:
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In addition, an element in the present disclosure may be referred to as being "fixed" or "disposed" on another element or being directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
The bladeless pneumatic flow guiding and rectifying system comprises a compressed air tank 2, a control valve group 3, an I-type nozzle group 4, an II-type nozzle group 5, a monitoring instrument group 6 and a pipeline 7, wherein a plurality of groups of I-type nozzle groups 4 are arranged on the outer arc side of a flue 1, a plurality of groups of II-type nozzle groups 5 are arranged on the inner arc side of the flue 1, the I-type nozzle group 4 and the II-type nozzle groups 5 are connected with the compressed air tank 2 through the pipeline 7, the control valve group 3 is arranged on the pipeline between the I-type nozzle group 4 and the compressed air tank 2, the control valve group 3 is arranged on the pipeline between the I-type nozzle group 4 and the II-type nozzle group 5, the compressed air quantity entering each group of nozzles is controlled by the control valve group 3, measuring points are respectively arranged on the front and the rear of the flue 1, and resistance change is monitored in real time through the monitoring instrument group 6.
The I-shaped nozzle group 4 consists of a plurality of groups of convergent nozzles forming a certain angle with the flue, compressed air is sprayed into the pipeline through the nozzles, and the flow velocity of the air flow in the area can be integrally improved due to the ejection effect of the air flow.
The group of II-type nozzles 5 consists of a plurality of groups of diffusion type nozzles forming a certain angle with the flue, compressed air is sprayed into the pipeline through the nozzles, and the flow velocity of the air flow in the area is wholly reduced due to the diffusion effect of the air flow.
The monitoring instrument group 6 is respectively arranged at the front and rear proper positions of the I-type nozzle group 4 and the II-type nozzle group 5 in the flue 1 and is used for monitoring the flue resistance change in real time.
The control valve group 3 consists of a plurality of manual, pneumatic or electric valves. The control valve group 3 respectively controls and adjusts the air flow pressure, flow and the like of different nozzle groups through the resistance parameters fed back in real time by the monitoring instrument group 6.
The monitoring instrument group 6 consists of a plurality of pressure and differential pressure transmitters.
The turbulence of the airflow field in the pipeline is mainly caused by the occurrence of a high-speed area and a low-speed area in the flow field when the airflow passes through irregular sections such as pipeline turning, reducing and the like, and the purpose of optimizing the flow field is to reduce the high-speed area and the low-speed area so as to enable the airflow speed of the whole pipeline to be close. After the flow field disturbance area of the pipeline is determined by means of a flow field numerical simulation tool or experimental measurement data, a plurality of compressed air tanks 2 are arranged at proper positions outside the flue and used as gas storage equipment, a plurality of groups of I-type nozzle groups 4 are arranged in a high-speed area and a plurality of groups of II-type nozzle groups 5 are arranged in a low-speed area in the flue. The resistance value measured in real time by the monitoring instrument group 6 is used for adjusting the gas flow rate of the control valve group 3 to a proper value in a high-speed area and a low-speed area, so that the purpose of optimizing the flow field is achieved.
According to the invention, a plurality of groups of nozzle groups with different structural forms capable of being adjusted in real time are arranged in a flow field disturbance area in the flue 1, and the air flow velocity in a low-speed area is improved, the air flow velocity in a high-speed area is reduced through the injection and diffusion phenomena of air flow, so that the purposes of air flow diversion and rectification are realized.
Compared with the conventional flow field optimization mode of adding fixed flow guiding and rectifying plates or blades, the flow guiding and rectifying device has the advantages that the flow speed of the air flow in the flow field can be regulated in real time according to monitoring data, the defect that the fixed blade type flow guiding and rectifying plates cannot be easily replaced after being installed at one time, such as poor effect, low investment, simple construction, short period and material saving, and light equipment almost does not need to consider the interference problem with the internal structure of a flue.
The foregoing is illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. It is intended that all such variations as fall within the scope of the appended claims.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011314053.2A CN112360848B (en) | 2020-11-21 | 2020-11-21 | A bladeless aerodynamic flow guidance and rectification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011314053.2A CN112360848B (en) | 2020-11-21 | 2020-11-21 | A bladeless aerodynamic flow guidance and rectification system |
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| Publication Number | Publication Date |
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| CN112360848A CN112360848A (en) | 2021-02-12 |
| CN112360848B true CN112360848B (en) | 2025-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011314053.2A Active CN112360848B (en) | 2020-11-21 | 2020-11-21 | A bladeless aerodynamic flow guidance and rectification system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202001765U (en) * | 2011-04-28 | 2011-10-05 | 唐力南 | Flow rate adjuster for bent pipe |
| CN203201879U (en) * | 2012-09-24 | 2013-09-18 | 天津市卡尔斯阀门有限公司 | Pipeline ejector pump |
| CN213684806U (en) * | 2020-11-21 | 2021-07-13 | 西安热工研究院有限公司 | Bladeless pneumatic flow guiding and rectifying system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101450278B (en) * | 2008-12-22 | 2011-04-06 | 西安热工研究院有限公司 | Whole wing type current sharing and partition adjustable ammonia-gas spraying device |
| EP2433701A1 (en) * | 2010-09-27 | 2012-03-28 | Alstom Technology Ltd | Gas flow control arrangement |
| US11002300B2 (en) * | 2019-01-30 | 2021-05-11 | General Electric Company | Flow conditioning system |
| CN111467957B (en) * | 2020-04-13 | 2024-02-02 | 华电电力科学研究院有限公司 | System and method for monitoring and dynamically regulating and controlling flow field distribution of denitration link of coal-fired power plant |
-
2020
- 2020-11-21 CN CN202011314053.2A patent/CN112360848B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202001765U (en) * | 2011-04-28 | 2011-10-05 | 唐力南 | Flow rate adjuster for bent pipe |
| CN203201879U (en) * | 2012-09-24 | 2013-09-18 | 天津市卡尔斯阀门有限公司 | Pipeline ejector pump |
| CN213684806U (en) * | 2020-11-21 | 2021-07-13 | 西安热工研究院有限公司 | Bladeless pneumatic flow guiding and rectifying system |
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| CN112360848A (en) | 2021-02-12 |
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