CN111379725A - Centrifugal gas compressor control method - Google Patents
Centrifugal gas compressor control method Download PDFInfo
- Publication number
- CN111379725A CN111379725A CN201811618578.8A CN201811618578A CN111379725A CN 111379725 A CN111379725 A CN 111379725A CN 201811618578 A CN201811618578 A CN 201811618578A CN 111379725 A CN111379725 A CN 111379725A
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- Prior art keywords
- guide vane
- pid1
- switched
- mode
- automatic
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/002—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying geometry within the pumps, e.g. by adjusting vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
Abstract
The invention discloses a control method of a centrifugal gas compressor, which adopts an adjusting mode of mainly controlling guide vanes and assisting backflow, gives a constant pressure control set value of 1 as normal, and controls the opening degree of an inlet guide vane valve through a PID1 module after comparing with a feedback 1; when the user consumption is reduced and the opening degree of the guide vane is smaller than or equal to the lower opening limit, the PID1 is switched to a manual mode, the opening degree of the guide vane is kept, the PID2 is switched to an automatic mode, and the return valve participates in automatic adjustment; the user usage is restored, the return valve is closed, and the PID1 is switched to the "automatic" mode; when the user usage is increased and the guide vane opening is greater than or equal to the upper opening limit, the PID1 is switched to a manual mode, the guide vane opening is kept, and the PID1 is switched to an automatic mode after external conditions are changed; the exhaust pressure is greater than or equal to the alarm value, the set value is 2, a safety control line is newly added, and if the working point touches or crosses an anti-surge line, the emptying valve is fully opened and the return valve is fully opened; and if the working point touches or crosses the surge line, the compressor is stopped.
Description
Technical Field
The invention relates to a control method of a centrifugal gas compressor.
Background
South China domestic 12# circulating nitrogen press for oxygen generation branch of energy center (40000 m)3The exhaust pressure before transformation is basically manually adjusted, only backflow can participate in automatic adjustment, the equipment is unstable in operation and is easily influenced by the change of the use amount of a user; the hysteresis of manual adjustment affects the air supply quality; the remote monitoring can be realized only, and the remote control cannot be realized; due to the fact thatThe pressure adjustment mainly utilizes reflux and emptying, and the energy consumption of the equipment is higher.
Disclosure of Invention
The invention aims to provide a control method of a centrifugal gas compressor, which has the advantages of good energy-saving effect, capability of improving the safety and reliability, capability of remote control and working efficiency, enhanced program readability and easiness in fault finding and maintenance.
The invention aims to realize the method, a centrifugal gas compressor control method adopts a regulation mode that guide vane control is taken as a main mode and backflow is taken as an auxiliary mode, 1 is given as a normal constant pressure control set value, and after the set value is compared with feedback 1, the opening degree of an inlet guide vane valve is controlled through a PID1 module, so that the exhaust pressure of the compressor is controlled; when the user consumption is reduced and the opening degree of the guide vane is smaller than or equal to the lower opening limit, the PID1 is switched to a manual mode, the opening degree of the guide vane is kept, the PID2 is switched to an automatic mode, and the return valve participates in automatic adjustment; the user usage is restored, the return valve is closed, and the PID1 is switched to the "automatic" mode; when the user usage is increased and the guide vane opening is greater than or equal to the upper opening limit, the PID1 is switched to a manual mode, the guide vane opening is kept, and the PID1 is switched to an automatic mode after external conditions are changed; when the dosage of an external user is suddenly changed to a large extent, the exhaust pressure is greater than or equal to the alarm value, the set value is 2, in order to prevent the air separation device from being impacted, the vent valve is automatically adjusted, and the vent valve is closed after the pressure is reduced; a safety control line is newly added, when a working point touches or crosses the safety control line, alarm information is sent, the alarm can be eliminated after manual confirmation, and the compressor and related equipment need to be checked and intervened; if the working point touches or crosses the anti-surge line, the emptying valve is fully opened, and the return valve is fully opened; if the working point touches or crosses the surge line, the compressor is stopped; the remote control function is realized by adding an I/O point, modifying local and remote human-computer interfaces and increasing remote data communication parameters.
The method realizes the automatic regulation of the exhaust pressure by establishing a new control model; the economical and safe adjusting mode with guide vane control as the main part and backflow as the auxiliary part (mainly overcoming the factor with smaller adjustable range of the guide vane) is satisfied; and automatic emptying regulation is added, so that the influence of sudden and large changes of external users on the air distribution system is relieved. The anti-surge control is optimized, the safety control line and the alarm are added, and the reliability of the safe operation of the compressor is improved. The original remote control mode that only a read mode is available is changed, data or variables cannot be written, and the remote control function is realized. The control program is optimized, the original control program is compiled by adopting an STL (statement list) indirect addressing mode, and is compiled by adopting a ladder diagram (LAD) and Functional Block Diagram (FBD) voice direct addressing mode instead, so that the readability and maintainability of the program are improved. And the remote and local human-computer interfaces are optimized so as to facilitate remote operation, manual automatic switching and the like, range modification, interlocking and alarm parameter setting, PID parameter setting and the like.
The method has obvious energy-saving effect, improves the safety and reliability, can be remotely controlled, improves the working efficiency, enhances the readability of the program, is easy to find and maintain faults, has wider application range, can be applied to the automatic transformation of centrifugal gas compression equipment (non-flammable and explosive gas compression, such as nitrogen, air and the like) in various industries, and can also be applied to the production and the manufacture of domestic centrifugal gas compressors.
Drawings
The present invention will be described in further detail below with reference to the accompanying drawings.
Fig. 1 is a diagram of a compressor control model.
Detailed Description
A centrifugal gas compressor control method, as shown in figure 1, adopts a regulation mode that guide vane control is main and backflow is auxiliary, gives 1 as a normal constant pressure control set value, and controls the opening degree of an inlet guide vane valve through a PID1 module after comparing with feedback 1, thereby controlling the exhaust pressure of the compressor; when the user consumption is reduced and the opening degree of the guide vane is smaller than or equal to the lower opening limit, the PID1 is switched to a manual mode, the opening degree of the guide vane is kept, the PID2 is switched to an automatic mode, and the return valve participates in automatic adjustment; the user usage is restored, the return valve is closed, and the PID1 is switched to the "automatic" mode; when the user usage is increased and the guide vane opening is greater than or equal to the upper opening limit, the PID1 is switched to a manual mode, the guide vane opening is kept, and the PID1 is switched to an automatic mode after external conditions are changed; when the dosage of an external user is suddenly changed to a large extent, the exhaust pressure is greater than or equal to the alarm value, the set value is 2, in order to prevent the air separation device from being impacted, the vent valve is automatically adjusted, and the vent valve is closed after the pressure is reduced; a safety control line is newly added, when a working point touches or crosses the safety control line, alarm information is sent, the alarm can be eliminated after manual confirmation, and the compressor and related equipment need to be checked and intervened; if the working point touches or crosses the anti-surge line, the emptying valve is fully opened, and the return valve is fully opened; if the working point touches or crosses the surge line, the compressor is stopped; the remote control function is realized by adding an I/O point, modifying local and remote human-computer interfaces and increasing remote data communication parameters.
Claims (1)
1. A centrifugal gas compressor control method is characterized in that a guide vane control is adopted as a main and backflow is adopted as an auxiliary adjusting mode, a given 1 is a normal constant pressure control set value, and after the set value is compared with a feedback 1, the opening degree of an inlet guide vane valve is controlled through a PID1 module, so that the exhaust pressure of a compressor is controlled; when the user consumption is reduced and the opening degree of the guide vane is smaller than or equal to the lower opening limit, the PID1 is switched to a manual mode, the opening degree of the guide vane is kept, the PID2 is switched to an automatic mode, and the return valve participates in automatic adjustment; the user usage is restored, the return valve is closed, and the PID1 is switched to the "automatic" mode; when the user usage is increased and the guide vane opening is greater than or equal to the upper opening limit, the PID1 is switched to a manual mode, the guide vane opening is kept, and the PID1 is switched to an automatic mode after external conditions are changed; when the dosage of an external user is suddenly changed to a large extent, the exhaust pressure is greater than or equal to the alarm value, the set value is 2, in order to prevent the air separation device from being impacted, the vent valve is automatically adjusted, and the vent valve is closed after the pressure is reduced; a safety control line is newly added, when a working point touches or crosses the safety control line, alarm information is sent, the alarm can be eliminated after manual confirmation, and the compressor and related equipment need to be checked and intervened; if the working point touches or crosses the anti-surge line, the emptying valve is fully opened, and the return valve is fully opened; if the working point touches or crosses the surge line, the compressor is stopped; the remote control function is realized by adding an I/O point, modifying local and remote human-computer interfaces and increasing remote data communication parameters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811618578.8A CN111379725B (en) | 2018-12-28 | 2018-12-28 | Centrifugal gas compressor control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811618578.8A CN111379725B (en) | 2018-12-28 | 2018-12-28 | Centrifugal gas compressor control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111379725A true CN111379725A (en) | 2020-07-07 |
| CN111379725B CN111379725B (en) | 2021-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811618578.8A Active CN111379725B (en) | 2018-12-28 | 2018-12-28 | Centrifugal gas compressor control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116733768A (en) * | 2023-06-05 | 2023-09-12 | 南通天生港发电有限公司 | Energy-saving adjusting system and energy-saving adjusting method for gear accelerating centrifugal air compressor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01285698A (en) * | 1988-04-02 | 1989-11-16 | Man Gutehoffnungshuette Ag | Adjusting method avoiding surge of turbocompressor by blow-off |
| US5873257A (en) * | 1996-08-01 | 1999-02-23 | Smart Power Systems, Inc. | System and method of preventing a surge condition in a vane-type compressor |
| CN102788004A (en) * | 2012-07-30 | 2012-11-21 | 宝山钢铁股份有限公司 | Anti-surge early warning control method of COREX gas compressor |
| CN105443348A (en) * | 2015-12-23 | 2016-03-30 | 上海金自天正信息技术有限公司 | Gas compressor system |
| CN107587998A (en) * | 2016-07-07 | 2018-01-16 | 韩华泰科株式会社 | Compressor control system and method |
-
2018
- 2018-12-28 CN CN201811618578.8A patent/CN111379725B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01285698A (en) * | 1988-04-02 | 1989-11-16 | Man Gutehoffnungshuette Ag | Adjusting method avoiding surge of turbocompressor by blow-off |
| US5873257A (en) * | 1996-08-01 | 1999-02-23 | Smart Power Systems, Inc. | System and method of preventing a surge condition in a vane-type compressor |
| CN102788004A (en) * | 2012-07-30 | 2012-11-21 | 宝山钢铁股份有限公司 | Anti-surge early warning control method of COREX gas compressor |
| CN105443348A (en) * | 2015-12-23 | 2016-03-30 | 上海金自天正信息技术有限公司 | Gas compressor system |
| CN107587998A (en) * | 2016-07-07 | 2018-01-16 | 韩华泰科株式会社 | Compressor control system and method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116733768A (en) * | 2023-06-05 | 2023-09-12 | 南通天生港发电有限公司 | Energy-saving adjusting system and energy-saving adjusting method for gear accelerating centrifugal air compressor |
| CN116733768B (en) * | 2023-06-05 | 2023-12-26 | 南通天生港发电有限公司 | Energy-saving adjusting system and energy-saving adjusting method for gear accelerating centrifugal air compressor |
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| CN111379725B (en) | 2021-06-25 |
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