CN106338182B - A kind of energy-saving control method of air-seperation system - Google Patents
A kind of energy-saving control method of air-seperation system Download PDFInfo
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- CN106338182B CN106338182B CN201610723171.6A CN201610723171A CN106338182B CN 106338182 B CN106338182 B CN 106338182B CN 201610723171 A CN201610723171 A CN 201610723171A CN 106338182 B CN106338182 B CN 106338182B
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- air
- expanding machine
- recycle compressor
- cold end
- energy
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- 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
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04375—Details relating to the work expansion, e.g. process parameter etc.
- F25J3/04393—Details relating to the work expansion, e.g. process parameter etc. using multiple or multistage gas work expansion
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- 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
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04163—Hot end purification of the feed air
- F25J3/04169—Hot end purification of the feed air by adsorption of the impurities
- F25J3/04175—Hot end purification of the feed air by adsorption of the impurities at a pressure of substantially more than the highest pressure column
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- 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
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
- F25J3/0429—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of feed air, e.g. used as waste or product air or expanded into an auxiliary column
- F25J3/04296—Claude expansion, i.e. expanded into the main or high pressure column
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- 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
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04333—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams
- F25J3/04339—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of air
- F25J3/04345—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of air and comprising a gas work expansion loop
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- 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
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- 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
- F25J3/04812—Different modes, i.e. "runs" of operation
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- 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
- F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
- F25J2230/40—Processes or apparatus involving steps for increasing the pressure of gaseous process streams the fluid being air
-
- 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
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/40—Processes or apparatus involving steps for recycling of process streams the recycled stream being air
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The invention discloses a kind of energy-saving control methods of air-seperation system, belong to gas liquefaction separation technology field comprising 1) aperture of recycle compressor inlet valve is 65~75%；2) aperture of recycle compressor by-passing valve is slowly decreased to 0 through repeatedly adjustment by 100%；3) expanding machine rotating speed in hot junction is 30000~32000r/min；4) cold end expanding machine rotating speed is 35000~37000r/min；5) the feed liquor valve opening for adjusting tower under rectifying column ensures that lower pressure tower is 450Kpa.The present invention reduces the energy consumption to flog a dead horse by the closing to compressor bypass valve, and the energy consumption of recycle compressor is greatly reduced, meanwhile by being accurately controlled to each execution unit operating parameter, avoiding the surge of system, stability when system call interception is improved, keeps system operation safe and reliable.
Description
Technical field
The invention belongs to gas liquefaction separation technology fields, and in particular to a kind of Energy Saving Control side of air-seperation system
Method.
Background technology
Existing air-seperation system all operates within the scope of design parameter substantially, and there are larger energy consumptions.Such as certain
4000Nm3/ h units, the relevant operational parameter that supplier provides are：Recycle compressor, entry guide vane (inlet valve) standard-sized sheet, import
Flow about 37000Nm3/ h, by-passing valve open 10%-25%, outlet pressure 2.9MPa；Hot junction expanding machine, entry nozzle (import
Valve) 55%, inlet flow rate about 14500Nm3/ h, outlet pressure 0.575MPa, rotating speed 29000r/min；Hot junction supercharger, import
Valve standard-sized sheet, inlet flow rate 32100Nm3/ h, outlet pressure 4.3MPa；Cold end expanding machine, entry nozzle (inlet valve) 65%, import
Flow about 13000Nm3/ h, outlet pressure 0.58MPa, rotating speed 34000r/min；Cold end supercharger, inlet valve standard-sized sheet, inlet flow
Measure 32100Nm3/ h, outlet pressure 5.5MPa.
Design production capacity can be reached according to the operating instruction operation of supplier, but there are larger designs to have more than needed for the system,
Potentiality are not excavated, and there are larger system energy consumptions, meanwhile, by-passing valve opens 10%-25% and is equivalent to emptying 10%-
25%, there is also larger consumings for energy, therefore, if can only be joined by controlling on the basis of existing air-seperation system
Several changes can be achieved energy-saving to have great importance.
Invention content
In view of this, the purpose of the present invention is to provide a kind of controls that existing air-seperation system energy consumption can be greatly reduced
Method, to solve the problems, such as that prior art energy consumption is excessively high.
In order to achieve the above objectives, the purpose of the present invention is achieved through the following technical solutions：
A kind of energy-saving control method of air-seperation system, after recycle compressor is compressed and is cooled down, a part of compressed air
It is extracted out after being backflowed gas cooling to certain temperature into main heat exchanger, is sent into the expanding machine of hot junction and carries out swell refrigeration, expanded
Air afterwards returns to main heat exchanger, and is mixed wherein with the air after cold end expanding machine demi-inflation re-heat, continues re-heat extremely
Room temperature, cooling box remove recycle compressor as circulation air；The remaining air for going out recycle compressor enters the increasing of hot junction expanding machine
Pressure side is pressurized, and enters the pressurized end of cold end expanding machine after the cooling of supercharger aftercooler, is pressurized and after cold end supercharger
Cooler cools down, and subsequently into main heat exchanger, after being cooled to certain temperature, most of air, which is extracted, is sent into cold end expanding machine
Swell refrigeration, the air after expansion enter tower on rectifying column, the gas after separation through vapor-liquid separation after the liquid throttling after separation
Part is sent into tower under rectifying column and participates in rectifying, remaining enters main heat exchanger re-heat as circulation air cooling box；It is pressurized through cold end
Machine remaining air after supercharged continues to enter tower participation rectifying under rectifying column through throttling after cooling liquid in main heat exchanger, also wraps
Include state modulator below：
1) aperture of recycle compressor inlet valve is 65~75%；
2) aperture of recycle compressor by-passing valve is slowly decreased to 0 through repeatedly adjustment by 100%；
3) expanding machine rotating speed in hot junction is 30000~32000r/min；
4) cold end expanding machine rotating speed is 35000~37000r/min；
5) the bypass valve opening between cold end expanding machine and hot junction expanding machine is 0~5%；
6) the feed liquor valve opening for adjusting tower under rectifying column ensures that lower pressure tower is 445~455Kpa；
It step 1), 2), 3), 4), 5) and 6) corrdinated adjustment and is completed at the same time.
Further, the outlet pressure of recycle compressor is 2.6~2.7MPa.
Further, it is 5% that the aperture of recycle compressor by-passing valve adjusts amplitude every time.
The beneficial effects of the present invention are：
The present invention reduces the energy consumption to flog a dead horse, the energy consumption of recycle compressor by the closing to compressor bypass valve
It is greatly reduced, in the case of so that the production capacity of air-seperation system is not reduced, and the energy consumption of system decreases, and realizes section
It can lower consumption, meanwhile, by being accurately controlled to each execution unit operating parameter, avoid the surge of system and unstable, raising
Stability when system call interception, keeps the system operation safe and reliable.
Description of the drawings
Fig. 1 is the structural schematic diagram of certain air-seperation system.
Specific implementation mode
Below in conjunction with attached drawing, the preferred embodiment of the present invention is described in detail.
As shown in Figure 1, for the structural schematic diagram of certain air-seperation system, air-separating technology is：Recycle compressor pressure
Contract it is cooling after, a part of compressed air, which enters main heat exchanger, is backflowed and is extracted out after gas cooling to certain temperature, and hot junction is sent into
Swell refrigeration is carried out in expanding machine, the air after expansion returns to main heat exchanger, and multiple with cold end expanding machine demi-inflation wherein
Air mixing after heat, continues re-heat to room temperature, cooling box removes recycle compressor as circulation air；Go out its of recycle compressor
Remaining air enters the pressurized end supercharging of hot junction expanding machine, and enters the supercharging of cold end expanding machine after the cooling of supercharger aftercooler
End is pressurized and is cooled down through cold end supercharger aftercooler, most of after being cooled to certain temperature subsequently into main heat exchanger
Air, which is extracted, is sent into cold end expander refrigeration, and for the air after expansion through vapor-liquid separation, the liquid throttling after separation is laggard
Enter tower on rectifying column, the gas part after separation is sent into tower under rectifying column and participates in rectifying, remaining enters main heat exchanger re-heat conduct
Circulation air cooling box；Through cold end supercharger remaining air after supercharged continue in main heat exchanger after cooling liquid through throttle into
Enter tower under rectifying column and participates in rectifying.
The operating parameter that the equipment supplier of the system provides is：Air compressor machine, entry guide vane (inlet valve) standard-sized sheet, blow valve
It is fully closed, inlet flow rate about 21500Nm3/ h, outlet pressure 0.5MPa；Recycle compressor, entry guide vane (inlet valve) standard-sized sheet, into
Mouth flow about 37000Nm3/ h, by-passing valve open 10%-25%, outlet pressure 2.9MPa；Hot junction expanding machine, entry nozzle (into
Mouth valve) 55%, inlet flow rate about 14500Nm3/ h, outlet pressure 0.575MPa, rotating speed 29000r/min；Hot junction supercharger, into
Mouth valve standard-sized sheet, inlet flow rate 32100Nm3/ h, outlet pressure 4.3MPa；Cold end expanding machine, entry nozzle (inlet valve) 65%, into
Mouth flow about 13000Nm3/ h, outlet pressure 0.58MPa, rotating speed 36000r/min；Cold end supercharger, inlet valve standard-sized sheet, import
Flow 32100Nm3/ h, outlet pressure 5.5MPa.It can reach design production capacity, cycle compression according to the operating instruction operation of supplier
Electromechanics stream 249A, by-passing valve open 10%-25%.
As it can be seen that above system design is more than needed, there is also more wastes for by-passing valve, and there are energy-efficient potentiality, the prior art carries
How goes out to increase the schemes such as a piston compressor or a set of professional control software of purchase, but be required for increasing additional investment
In the case where not increasing additional investment, achieve the purpose that energy-saving, the following energy-saving control method of applicant's proposition：
One, the adjustment of recycle compressor：
1) meet compressor do not kick shake under conditions of, the aperture of recycle compressor inlet valve is 60~70%, most preferably
65%；
2) recycle compressor by-passing valve (being equivalent to blow valve) is gradually turned down from 100% to 0, is turned down amplitude every time and is no more than
5%；
3) outlet pressure for reducing recycle compressor is stepped up to 2.6~2.7MPa, most preferably 2.65MPa.
To coordinate inlet valve when startup, by-passing valve, the adjustment of outlet pressure first operates inlet valve, again outlet pressure, last
By-passing valve.The cooling potential of expanding machine is fully taken into account when adjusting recycle compressor, expanding machine wants corrdinated adjustment.It is logical
The closing gradually to compressor bypass valve is crossed, the energy consumption to flog a dead horse is reduced, the energy consumption of recycle compressor is greatly reduced.
Two, the adjustment of expanding machine：
Cold end expanding machine rotating speed leads to no more than 37400r/min, hot junction expanding machine rotating speed no more than 34000r/min
Big nozzle is crossed out to increase expanding machine air inflow, hot junction expanding machine rotating speed is controlled in 30000~32000r/min or so, most preferably
31000r/min, cold end expanding machine rotating speed are controlled in 35000~37000r/min or so.It is expanded when turning down expansion unit return valve
Machine rotating speed may increase, and turn down nozzle of expansion machine accordingly, and by the bypass between cold end expanding machine and hot junction expanding machine
Valve opening is set as 0~5%, it is generally desirable to and it is fully closed, fully squeeze the potentiality of expanding machine.Swell increment is improved by improving rotating speed,
The refrigerating capacity lost because recycle compressor outlet pressure reduces recovers.
Three, the adjustment of rectifying column：
Adjust the aperture of the liquid feed valve LCV3 of tower under rectifying column, it is ensured that the pressure of tower is 445~455Kpa under rectifying column, most
Excellent is 450Kpa.
After the completion of adjustment, recycle compressor electric current is reduced to 232A or so by 249A, reduces by 10~20A, and production capacity does not have
It reduces, has saved energy consumption.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (3)
1. a kind of energy-saving control method of air-seperation system, after recycle compressor is compressed and is cooled down, a part of compressed air into
Enter main heat exchanger and backflowed and extracted out after gas cooling to certain temperature, is sent into the expanding machine of hot junction and carries out swell refrigeration, after expansion
Air return to main heat exchanger, and mix wherein with the air after cold end expanding machine demi-inflation re-heat, continuation re-heat is to normal
Temperature, cooling box remove recycle compressor as circulation air；The remaining air for going out recycle compressor enters the supercharging of hot junction expanding machine
End supercharging, and be pressurized simultaneously cold after cold end supercharger into the pressurized end of cold end expanding machine after the cooling of supercharger aftercooler
But device cools down, and subsequently into main heat exchanger, after being cooled to certain temperature, it is swollen that most of air is extracted feeding cold end expanding machine
Swollen refrigeration, the air after expansion enter tower on rectifying column, the gas portion after separation through vapor-liquid separation after the liquid throttling after separation
It is distributed into tower under rectifying column and participates in rectifying, remaining enters main heat exchanger re-heat as circulation air cooling box；Through cold end supercharger
Remaining air after supercharged continues to enter tower participation rectifying, feature under rectifying column through throttling after cooling liquid in main heat exchanger
It is：It further include state modulator below：
1) aperture of recycle compressor inlet valve is 65~75%；
2) aperture of recycle compressor by-passing valve is slowly decreased to 0 through repeatedly adjustment by 100%；
3) expanding machine rotating speed in hot junction is 30000~32000r/min；
4) cold end expanding machine rotating speed is 35000~37000r/min；
5) the bypass valve opening between cold end expanding machine and hot junction expanding machine is 0~5%；
6) the feed liquor valve opening for adjusting tower under rectifying column ensures that lower pressure tower is 445~455Kpa；
It step 1), 2), 3), 4), 5) and 6) corrdinated adjustment and is completed at the same time.
2. a kind of energy-saving control method of air-seperation system according to claim 1, it is characterised in that：Recycle compressor
Outlet pressure be 2.6~2.7Mpa.
3. a kind of energy-saving control method of air-seperation system according to claim 1, it is characterised in that：Recycle compressor
It is 5% that the aperture of by-passing valve adjusts amplitude every time.
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| CN201610723171.6A CN106338182B (en) | 2016-08-25 | 2016-08-25 | A kind of energy-saving control method of air-seperation system |
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| CN201610723171.6A CN106338182B (en) | 2016-08-25 | 2016-08-25 | A kind of energy-saving control method of air-seperation system |
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| CN106338182B true CN106338182B (en) | 2018-11-06 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109973412B (en) * | 2017-12-27 | 2020-09-01 | 沈阳自动化研究所(昆山)智能装备研究院 | Anti-surge method for oxygen compressor of external compression air separation device |
| CN108240734B (en) * | 2018-03-08 | 2024-03-26 | 李佳晨 | Air supply system of booster expander and air separation equipment |
| CN109883140A (en) * | 2019-03-29 | 2019-06-14 | 湖北浠水蓝天联合气体有限公司 | A kind of nitrogen gas liquefaction system after space division system rectifying |
| CN112556312A (en) * | 2020-12-12 | 2021-03-26 | 镇江市恒利低温技术有限公司 | Steam-driven air separation method and steam T-stage utilization system for same |
| CN112556313A (en) * | 2020-12-28 | 2021-03-26 | 镇江市恒利低温技术有限公司 | Heat supply and air separation system utilizing high-temperature and high-pressure steam and application method thereof |
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| CN101684982A (en) * | 2008-09-28 | 2010-03-31 | 鞍钢股份有限公司 | Thermal-state starting method of air separation equipment |
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