CN115420064B - Method for regulating and controlling anti-asthma of booster expander - Google Patents
Method for regulating and controlling anti-asthma of booster expander Download PDFInfo
- Publication number
- CN115420064B CN115420064B CN202210989070.9A CN202210989070A CN115420064B CN 115420064 B CN115420064 B CN 115420064B CN 202210989070 A CN202210989070 A CN 202210989070A CN 115420064 B CN115420064 B CN 115420064B
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- China
- Prior art keywords
- expander
- dcs
- controlling
- booster
- regulating
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000001276 controlling effect Effects 0.000 title claims abstract description 25
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 18
- 230000001088 anti-asthma Effects 0.000 title claims abstract description 9
- 239000000924 antiasthmatic agent Substances 0.000 title claims abstract description 9
- 238000010992 reflux Methods 0.000 claims abstract description 13
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims 2
- 230000002265 prevention Effects 0.000 abstract description 9
- 238000000926 separation method Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
- F25J3/04109—Arrangements of compressors and /or their drivers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C20/00—Control of, monitoring of, or safety arrangements for, machines or engines
- F01C20/28—Safety arrangements; Monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
- F25J3/04781—Pressure changing devices, e.g. for compression, expansion, liquid pumping
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention relates to a method for regulating and controlling the anti-asthma of a booster expander, which relates to the technical field of air separation, a hand controller is programmed through a DCS system, a logic programming hand controller is used in the starting process of the expander, PID is automatically controlled to accelerate, automatic operation is put into in the boosting process, and a DCS catcher is used for automatically controlling a reflux valve of the expander, so that the effect of more stable operation is achieved; and, keep the back flow valve of the expander in the closed state all the time, the expander can obtain the maximum unit refrigerating capacity. The method for regulating and controlling the surge prevention of the booster expander realizes the automatic control operation of the reflux valve of the expander, can avoid surge of the expander in the boosting process, ensures balanced boosting speed, greatly reduces labor intensity of personnel, reduces misoperation of work, can ensure the maximum efficiency operation of the expander, and improves work quality and work efficiency.
Description
Technical Field
The invention relates to the technical field of air separation, in particular to an expander adding technology, and specifically relates to a method for regulating and controlling the anti-asthma of a booster expander.
Background
The expander is an air separation device of a full low-pressure flow for providing cold for an air separation tower of an oxygen generator set, and is one of heart units of the air separation device. The cold energy is produced by the isentropic expansion of the gas in the expander, and the system is supplemented with cold loss in normal production. The refrigerating capacity of the expander is about 80% -90% of the whole air separation device, the pressure of the expansion air is increased through a supercharging end driven by a turbine of the expander, the expansion air enters a refrigerator after being cooled by cooling water, and is cooled by heat exchange with liquid oxygen, polluted nitrogen and the like, and then the expansion air is delivered to an expansion end of the expander, so that the temperature can be reduced by about 60 ℃ according to the current expansion efficiency.
The oxygen generator set adopts a low-temperature refrigeration method on the oxygen production method, and in the process of obtaining low temperature, the expander is used as important refrigeration equipment to provide more than 85% of cold energy for the air separation tower system. In the oxygen generating unit, the control of the efficiency of the expander and the rotating speed of the equipment is strict and basically is 15000 r/m, so that the best refrigeration efficiency of the expander needs to be finely adjusted and exerted when an operator of the expander operates the equipment.
When the expander is started or is in a reverse state, in the starting and boosting process, the current control mode is to manually gradually close a reflux valve on a DCS distributed control system (DCS system for short) to boost so as to exert the optimal refrigeration efficiency of the expander. The manual control of the pressurization of the return valve currently has the following problems: 1. the control is needed by experience, and if the experience of staff is insufficient, the expander is easy to surge in the supercharging process; 2. the unbalanced boosting speed can be caused by insufficient experience of staff in the boosting process; 3. and the reflux valve is controlled manually, so that the daily workload of staff is increased.
For this reason, a method for controlling the anti-surge of the booster expander is proposed by those skilled in the art to solve the technical problems presented in the background above.
Disclosure of Invention
The invention aims to provide a method for regulating and controlling the anti-asthma of a booster expander, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: according to the method for regulating and controlling the surge prevention of the booster expander, the DCS is used for programming the hand controller, the logic programming hand controller is used in the starting process of the expander, PID is automatically controlled to accelerate, automatic operation is put into the boosting process, and the DCS catcher is used for automatically controlling the reflux valve of the expander, so that the effect of stable operation is achieved.
Preferably, the control mode adopted by the method for regulating and controlling the surge prevention of the booster expander always keeps the reflux valve of the expander in a closed state, and the expander can obtain the maximum unit refrigerating capacity.
Preferably, in the method for regulating and controlling the surge prevention of the booster expander, when the rotating speed of the expander is abnormal, the DCS system automatically opens the protection equipment.
Preferably, in the method for regulating and controlling the surge prevention of the booster expander, when the expander fluctuates, the DCS system automatically adjusts the rotating speed to match with the real-time boosting condition of the expander, so as to prevent the surge or over-rotation of the expander from damaging equipment.
Compared with the prior art, the invention has the beneficial effects that: according to the method for regulating and controlling the surge prevention of the booster expander, the automatic control operation of the reflux valve of the expander is realized by editing the manual operation device, so that surge of the expander in the boosting process can be avoided, the boosting speed is ensured to be balanced, the labor intensity of personnel is greatly reduced, and the working operation errors are reduced; and the return valve of the expander is always kept in a closed state, the expander can obtain the maximum unit refrigerating capacity, the maximum efficiency operation of the expander can be ensured, and the working quality and the working efficiency are improved.
Detailed Description
The technical scheme of the patent is further described in detail below with reference to the specific embodiments.
The DCS distributed control system (DCS system for short) is based on a microprocessor, adopts a basic design idea of centralized control dispersion, operation and management, and adopts a multi-layer hierarchical and cooperative autonomous structural form. The DCS is mainly characterized by centralized management and decentralized control, and is widely applied to various industries such as electric power, metallurgy, petrochemical industry and the like.
The invention provides a method for regulating and controlling the anti-asthma of a booster expander, which comprises the steps of programming a hand controller through a DCS (distributed control system), using a logic programming hand controller in the starting process of the expander, automatically accelerating through PID (proportion integration differentiation) automatic control, inputting automatic operation in the boosting process, and automatically controlling a reflux valve of the expander by a DCS catcher to achieve the effect of more stable operation; the phenomenon that the expander is in breathing state due to insufficient experience of staff in manual operation in the pressurizing process and the phenomenon that the pressurizing speed is unbalanced due to insufficient experience of staff can be effectively overcome.
The invention relates to a method for regulating and controlling the anti-asthma of a booster expander, wherein a DCS system comprises an industrial computer and a DCS cabinet, and clamping pieces are arranged in the DCS cabinet; the oxygen generating equipment such as the expander is provided with instrument measuring equipment such as a flowmeter, a liquid level meter, a pressure transmitter, a thermal resistor and the like; the instrument measuring devices are connected to the clamping pieces in the DCS cabinet through instrument control cables, data on the clamping pieces in the DCS cabinet are transmitted to the industrial computer, and DCS system programmable software is installed on the industrial computer.
When the engine is started up normally at present, because staff experience is insufficient, the operation is too fast, the damage to surge equipment of the expander is easy to cause, in order to overcome the situation, the reflux valve is generally kept at about 10 degrees of opening, and the surge caused by the pressure fluctuation of the air compression station or the pressure fluctuation of the booster expander is effectively prevented. Further, compared with the prior art, the control mode adopted by the method for regulating and controlling the surge prevention of the booster expander disclosed by the invention is that the reflux valve of the expander is always kept in a closed state, and the expander can obtain the maximum unit refrigerating capacity; the back flow valve of the expander can be safely closed to 0 ℃, and the unit refrigerating capacity of the expander can be exerted to the maximum refrigerating capacity when the back flow valve of the expander is closed to 0 ℃; compared with the prior art, the invention can ensure the maximum efficiency operation of the expander.
In addition, according to the method for regulating and controlling the anti-asthma of the booster expander, when the rotating speed of the expander is abnormal, the DCS system automatically opens the protection equipment. Preferably, according to the method for regulating and controlling the surge prevention of the booster expander, when the expander fluctuates, the DCS automatically adjusts the rotating speed to match with the real-time boosting condition of the expander, so that the surge or over-rotation of the expander is prevented from damaging equipment; compared with the prior art, the device has the advantages that the working equipment such as the expansion machine is greatly protected, the service life of the equipment is prolonged, and the working cost is reduced because personnel are required to manually control the backflow valve of the expansion machine.
By adopting the method for regulating and controlling the surge prevention of the booster expander, the automatic control operation of the reflux valve of the expander is realized, the surge of the expander in the boosting process can be avoided, the boosting speed is ensured to be balanced, compared with the existing manual operation, the labor intensity of personnel is greatly reduced, the working misoperation is reduced, and the working quality and the working efficiency are improved.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (3)
1. A method for regulating and controlling the anti-asthma of a booster expander is characterized in that a hand controller is programmed through a DCS system, a logic programming hand controller is used in the starting process of the expander, PID is automatically controlled to accelerate, automatic operation is put into in the boosting process, and a DCS catcher is used for automatically controlling a reflux valve of the expander to achieve stable operation;
the reflux valve of the expander is always kept in a closed state, and the expander can obtain the maximum unit refrigerating capacity;
when the rotating speed of the expander is abnormal, the DCS system automatically opens the protection equipment;
when the expansion machine fluctuates, the DCS system automatically adjusts the rotating speed to match with the real-time supercharging condition of the expansion machine.
2. The method for controlling the anti-surge of a booster expander of claim 1, wherein the DCS system comprises an industrial computer and a DCS cabinet, and a clamping member is arranged in the DCS cabinet.
3. The method for controlling the surge protection of a booster expander of claim 2, wherein the expander is provided with an instrument measurement device, the instrument measurement device comprising a flowmeter, a level gauge, a pressure transmitter and a thermal resistor; the instrument measuring equipment is connected to the clamping piece of the DCS cabinet through the instrument control cable, data on the clamping piece in the DCS cabinet are transmitted to the industrial computer, and DCS system programmable software is installed on the industrial computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210989070.9A CN115420064B (en) | 2022-08-17 | 2022-08-17 | Method for regulating and controlling anti-asthma of booster expander |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210989070.9A CN115420064B (en) | 2022-08-17 | 2022-08-17 | Method for regulating and controlling anti-asthma of booster expander |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115420064A CN115420064A (en) | 2022-12-02 |
| CN115420064B true CN115420064B (en) | 2023-11-14 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210989070.9A Active CN115420064B (en) | 2022-08-17 | 2022-08-17 | Method for regulating and controlling anti-asthma of booster expander |
Country Status (1)
| Country | Link |
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| CN (1) | CN115420064B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775243A (en) * | 2012-10-19 | 2014-05-07 | 易旭 | Automotive waste heat power generation technology by cyclically using engine coolant |
| CN108592518A (en) * | 2018-04-09 | 2018-09-28 | 华北电力科学研究院有限责任公司 | Cryogenic liquefying air energy storage power generation and its start-up and shut-down control method |
| CN208779793U (en) * | 2018-09-06 | 2019-04-23 | 湖北浠水蓝天联合气体有限公司 | A kind of gas liquefaction system having interlock protection function |
| CN211782276U (en) * | 2020-03-30 | 2020-10-27 | 湖北浠水蓝天联合气体有限公司 | Air separation system capable of improving yield and reducing energy consumption |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210341223A1 (en) * | 2020-04-29 | 2021-11-04 | Saudi Arabian Oil Company | Computerized monitoring system for a turbo-expander brake compressor |
-
2022
- 2022-08-17 CN CN202210989070.9A patent/CN115420064B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775243A (en) * | 2012-10-19 | 2014-05-07 | 易旭 | Automotive waste heat power generation technology by cyclically using engine coolant |
| CN108592518A (en) * | 2018-04-09 | 2018-09-28 | 华北电力科学研究院有限责任公司 | Cryogenic liquefying air energy storage power generation and its start-up and shut-down control method |
| CN208779793U (en) * | 2018-09-06 | 2019-04-23 | 湖北浠水蓝天联合气体有限公司 | A kind of gas liquefaction system having interlock protection function |
| CN211782276U (en) * | 2020-03-30 | 2020-10-27 | 湖北浠水蓝天联合气体有限公司 | Air separation system capable of improving yield and reducing energy consumption |
Non-Patent Citations (1)
| Title |
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| 引进增压透平膨胀机的运行维护;钟连山;《深冷技术》(第06期);第34-37页 * |
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| CN115420064A (en) | 2022-12-02 |
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