CN104567064B - Energy-saving compression refrigeration method - Google Patents
Energy-saving compression refrigeration method Download PDFInfo
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- CN104567064B CN104567064B CN201510005214.2A CN201510005214A CN104567064B CN 104567064 B CN104567064 B CN 104567064B CN 201510005214 A CN201510005214 A CN 201510005214A CN 104567064 B CN104567064 B CN 104567064B
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- 238000007906 compression Methods 0.000 title claims abstract description 34
- 230000006835 compression Effects 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005057 refrigeration Methods 0.000 title claims abstract description 14
- 239000003507 refrigerant Substances 0.000 claims abstract description 43
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 28
- 238000004134 energy conservation Methods 0.000 claims description 21
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 10
- 238000004781 supercooling Methods 0.000 claims description 9
- 238000009833 condensation Methods 0.000 claims description 7
- 230000005494 condensation Effects 0.000 claims description 7
- 238000007701 flash-distillation Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000007791 liquid phase Substances 0.000 claims description 7
- 230000006837 decompression Effects 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 6
- 229910021529 ammonia Inorganic materials 0.000 claims description 5
- 239000012071 phase Substances 0.000 claims description 4
- 150000001336 alkenes Chemical class 0.000 claims 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 22
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 22
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000001088 anti-asthma Effects 0.000 description 1
- 239000000924 antiasthmatic agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 210000000952 spleen Anatomy 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/006—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
- F25J1/008—Hydrocarbons
- F25J1/0087—Propane; Propylene
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
-
- 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
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
- F25J1/0047—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle
- F25J1/0052—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream
-
- 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
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
- F25J1/0298—Safety aspects and control of the refrigerant compression system, e.g. anti-surge control
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses an energy-saving compression refrigeration method. Lower power consumption of a compressor is guaranteed because of the optimal design that a gaseous state refrigerant is subjected to three-section compression and cooling to enter an anti-surge loop; a refrigerant storage tank is incorporated into the compression refrigeration system to improve the stability of a compression refrigeration loop; the convenience of operation is greatly improved by the refrigerant evaporative emission system compared with the conventional power conveying mode.
Description
Technical field
The present invention relates to Compressing Refrigeration field, specifically a kind of energy-conservation compression refrigerating method.
Background technology
In chemical industry, gaseous refrigerant pressurization condensation throttling refrigeration technology mostly low-temp methanol is washed, low temperature oil wash, ammonia
The units such as synthesis Ammonia separation provide necessary cold environment.Traditional industry in producing more adopts two sections of compression refrigeration, subcooler shell
The gaseous refrigerant of journey flash distillation delivers to one section of entrance of compressor after being incorporated to the gaseous refrigerant of cold user's flash distillation；Compressor anti-asthma
Shake loop quoted from compressor outlet；After condensation, liquid refrigerant gravity flow to flash distillation after pressure-reducing valve decompression；Each section of entrance of compressor
The liquid phase refrigerant of separator is delivered to storage tank by pump.Conventional process techniques have that operational stability is poor, the higher shortcoming of energy consumption.
Content of the invention
It is an object of the invention to provide a kind of energy-conservation compresses refrigerating method, to solve the problems, such as existing process technology.
In order to achieve the above object, the technical solution adopted in the present invention is：
A kind of energy-conservation compression refrigerating method it is characterised in that：From the gaseous refrigerant of cold user, through one section of compressor
After entrance separator separates the liquid phase carried secretly, enter one section of entrance of compressor；Through the gaseous state after a section, two sections, three sections of compressions
Cold-producing medium, first passes through outlet cooler cooling, then after condenser condensation, liquid refrigerant gravity stream flows into surge tank, then
Send into flash tank after decompression and carry out intermediate flash；Flash tank gas phase divides feeding compressor after liquid through three sections of entrance separators of compressor
Three sections of entrances, flash tank liquid phase is divided into two strands, and one sends into subcooler shell side after reducing pressure again, and vacuum flashing absorbs tube side liquid
After cold-producing medium heat, then divide feeding two sections of entrances of compressor after liquid through two sections of entrance separators of compressor, send into supercooling for another strand
Device tube side sends user outside after heat exchange supercooling；The liquid refrigerant that each section of entrance separator of compressor is isolated sends into cold-producing medium row
Put vapo(u)rization system, send into one section of entrance of compressor after thermal medium heating and be circulated compression refrigeration；Compressor anti-surge returns
Pass is from after compressor outlet cooler, before condenser.
A kind of described energy-conservation compression refrigerating method it is characterised in that：Described cold-producing medium adopts propylene or ammonia or tool
There is the industrial refrigeration medium of similar physical property.
A kind of described energy-conservation compression refrigerating method it is characterised in that：Three sections of compressions are, from the gaseous state of cold user
Cold-producing medium enters one section of compressor；The gaseous refrigerant of subcooler shell side flash distillation sends into two sections of compressor, the gas that flash tank flashes off
Three sections of compressor sent into by state cold-producing medium.
A kind of described energy-conservation compression refrigerating method it is characterised in that：Described compressor outlet high temperature liquid refrigerant
First pass through outlet cooler and be cooled to 50-60 DEG C, then deliver to downstream through condenser condensation；Compressor anti-surge loop is quoted from cold
But before device post-condenser.
A kind of described energy-conservation compression refrigerating method it is characterised in that：Described condensator outlet elder generation gravity stream flows into slow
Rush tank and send into flash tank after pressure-reducing valve decompression again.
A kind of described energy-conservation compression refrigerating method it is characterised in that：Intermediate flash pressure is 0.3-1.0MPaG.
A kind of described energy-conservation compression refrigerating method it is characterised in that：The liquid refrigerant degree of supercooling sending user outside is 5-
20℃.
A kind of described energy-conservation compression refrigerating method it is characterised in that：The nucleus equipment of discharge refrigerant vapo(u)rization system is
Wall-type heat exchange evaporimeter, the liquid refrigerant that each section of entrance separator of compressor is isolated sends into evaporimeter, by thermal medium
One section of entrance of compressor is sent into after heating and gasifying.
The invention has the advantages that：
（1）Cold-producing medium, in the case of meeting user's low temperature requirements, selects the alternative chlorofluoro carbon on ozone layer no impact.
（2）Each section of entrance separator no liquid-phase operation of compressor, greatly reduces the risk of suction port of compressor gas carrying liquid.
（3）Three sections of compression processes, compressor power consumption is relatively low.
（4）Compressor anti-surge loop, quoted from working off one's feeling vent one's spleen after supercooling, can greatly reduce what anti-surge loop filled into
Desuperheat amount of liquid refrigerant, when compressor runs under anti-surge valve opening, energy consumption substantially reduces.
（5）Cold-producing medium storage tank is incorporated to refrigerating circuit, as liquid refrigerant surge tank, improves the stability of operation.
（6）Each section of entrance separator of compressor and the liquid refrigerant of other emission points discharge, through discharge refrigerant evaporation
Refrigerating circuit, the simplicity of the operation of offer significantly is returned after system evaporation.
Brief description
Fig. 1 compresses refrigeration process flow chart for energy-conservation of the present invention.
Specific embodiment
Shown in Figure 1, in Fig. 1, S-01, one section of entrance separator；S-02, two sections of entrance separators；S-03, three sections enter
Mouth separator；K-01, compressor；E-01, outlet cooler；E-02, condenser；E-03, subcooler；E-04, evaporimeter；V-
01st, flash tank；V-02, surge tank；P-01, delivery pump.
A kind of energy-conservation compresses refrigerating method, from the gaseous refrigerant of cold user, through one section of entrance separator of compressor
After separating the liquid phase carried secretly, enter one section of entrance of compressor；Through the gaseous refrigerant after a section, two sections, three sections of compressions, first warp
Cross the cooling of outlet cooler, then after condenser condensation, liquid refrigerant gravity stream flows into surge tank, then send into after reducing pressure and dodge
Steam groove and carry out intermediate flash；Flash tank gas phase divides feeding three sections of entrances of compressor after liquid through three sections of entrance separators of compressor, dodges
Steam tank liquor phase and be divided into two strands, one sends into subcooler shell side after reducing pressure again, and vacuum flashing absorbs tube side liquid refrigerant heat
Afterwards, then through two sections of entrance separators of compressor feeding two sections of entrances of compressor after liquid are divided, another strand of feeding subcooler tube side is through changing
User is sent outside after heat supercooling；The liquid refrigerant that each section of entrance separator of compressor is isolated sends into discharge refrigerant evaporation system
System, sends into one section of entrance of compressor after thermal medium heating and is circulated compression refrigeration；Compressor anti-surge loop is quoted from pressure
After contracting machine outlet cooler, before condenser.
Cold-producing medium is using propylene or ammonia or the industrial refrigeration medium with similar physical property.
Three sections of compressions are, enter one section of compressor from the gaseous refrigerant of cold user；The gas of subcooler shell side flash distillation
Two sections of compressor sent into by state cold-producing medium, and the gaseous refrigerant that flash tank flashes off sends into three sections of compressor.
Compressor outlet high temperature liquid refrigerant first passes through outlet cooler and is cooled to 50-60 DEG C, colder through condenser
Coagulate and deliver to downstream；Compressor anti-surge loop is quoted from after cooler, before condenser.
Condensator outlet elder generation gravity stream flows into surge tank and sends into flash tank after pressure-reducing valve decompression again.
Intermediate flash pressure is 0.3-1.0MPaG.
The liquid refrigerant degree of supercooling sending user outside is 5-20 DEG C.
Specific embodiment：
The nucleus equipment of discharge refrigerant vapo(u)rization system is wall-type heat exchange evaporimeter, and each section of entrance separator of compressor divides
The liquid refrigerant separating out sends into evaporimeter, by feeding one section of entrance of compressor after thermal medium heating and gasifying.
Cold-producing medium is propylene.Wash the propylene steam of unit from low-temp methanol, separate through one section of entrance separator and carry secretly
Propylene liguid after, enter one section of compressor.Propylene steam after compression is through outlet cooler and condenser by circulating water condensing
Become propylene liguid, send into propylene surge tank, enter propylene flash tank through decompression.The propylene steam flashing off in propylene flash tank
After separating, in three sections of entrance separators, the propylene liguid carried secretly, enter three sections of entrances of compressor.From propylene flash drum bottom
Propylene liguid out is divided into two strands, and one is directly entered the tube side of propylene subcooler, is entered propylene by another burst of vacuum flashing
Go low-temp methanol to wash unit after the low temperature propylene supercooling of subcooler shell side to use.From propylene subcooler shell side propylene steam out
Separate after the propylene liguid carried secretly through two sections of entrance separators, enter two sections of entrances of compressor.
The propylene liguid that each separator is isolated sends into evaporimeter, with the mixture of low-pressure steam and fresh water as heating agent
It is situated between, after propylene liguid gasification, sends into one section of entrance separator, return refrigeration system and re-use.
Specific process parameter is shown in Table 1：
Table 1 each logistics post tables of data
.
Claims (8)
1. a kind of energy-conservation compression refrigerating method it is characterised in that：From the gaseous refrigerant of cold user, through compressor, one section enters
After mouth separator separates the liquid phase carried secretly, enter one section of entrance of compressor；Through the gaseous state system after a section, two sections, three sections of compressions
Cryogen, first passes through outlet cooler cooling, then after condenser condensation, liquid refrigerant gravity stream flows into surge tank, then subtracts
Send into flash tank after pressure and carry out intermediate flash；Flash tank gas phase divides feeding compressor three after liquid through three sections of entrance separators of compressor
Section entrance, flash tank liquid phase is divided into two strands, and one sends into subcooler shell side after reducing pressure again, and vacuum flashing absorbs tube side liquid system
After cryogen heat, then divide feeding two sections of entrances of compressor, another strand of feeding subcooler after liquid through two sections of entrance separators of compressor
Tube side sends user outside after heat exchange supercooling；The liquid refrigerant that each section of entrance separator of compressor is isolated sends into discharge refrigerant
Vapo(u)rization system, sends into one section of entrance of compressor after thermal medium heating and is circulated compression refrigeration；Compressor anti-surge loop
Quoted from after compressor outlet cooler, before condenser.
2. a kind of energy-conservation compression refrigerating method according to claim 1 it is characterised in that：Described cold-producing medium adopts third
Alkene or ammonia.
3. a kind of energy-conservation compression refrigerating method according to claim 1 it is characterised in that：Three sections of compressions are, come self cooling
The gaseous refrigerant of amount user enters one section of compressor；The gaseous refrigerant of subcooler shell side flash distillation sends into two sections of compressor, flash distillation
The gaseous refrigerant that groove flashes off sends into three sections of compressor.
4. a kind of energy-conservation compression refrigerating method according to claim 1 it is characterised in that：Described compressor outlet high temperature
Gaseous refrigerant first passes through outlet cooler and is cooled to 50-60 DEG C, then delivers to downstream through condenser condensation；Compressor anti-surge
Before loop is quoted from cooler post-condenser.
5. a kind of energy-conservation compression refrigerating method according to claim 1 it is characterised in that：Described condensator outlet first weighs
Power stream flows into surge tank and sends into flash tank after pressure-reducing valve decompression again.
6. a kind of energy-conservation compression refrigerating method according to claim 1 it is characterised in that：Intermediate flash pressure is 0.3-
1.0MPaG.
7. a kind of energy-conservation compression refrigerating method according to claim 1 it is characterised in that：Send the liquid refrigerant of user outside
Degree of supercooling is 5-20 DEG C.
8. a kind of energy-conservation compression refrigerating method according to claim 1 it is characterised in that：Discharge refrigerant vapo(u)rization system
Nucleus equipment is wall-type heat exchange evaporimeter, and the liquid refrigerant that each section of entrance separator of compressor is isolated sends into evaporimeter,
By feeding one section of entrance of compressor after thermal medium heating and gasifying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510005214.2A CN104567064B (en) | 2015-01-06 | 2015-01-06 | Energy-saving compression refrigeration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510005214.2A CN104567064B (en) | 2015-01-06 | 2015-01-06 | Energy-saving compression refrigeration method |
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| Publication Number | Publication Date |
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| CN104567064A CN104567064A (en) | 2015-04-29 |
| CN104567064B true CN104567064B (en) | 2017-02-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105443402A (en) * | 2015-11-27 | 2016-03-30 | 安徽六国化工股份有限公司 | Centrifugal ammonia compressor unit with dual-cylinder compression three-section air inlet manner |
| CN106052175B (en) * | 2016-05-27 | 2019-06-14 | 中石化宁波工程有限公司 | Energy saving composite refrigerating device and refrigerating method |
| CN110005944B (en) * | 2019-04-23 | 2023-11-24 | 内蒙古博大实地化学有限公司 | Energy-saving and consumption-reducing type frozen ammonia conveying system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6742357B1 (en) * | 2003-03-18 | 2004-06-01 | Air Products And Chemicals, Inc. | Integrated multiple-loop refrigeration process for gas liquefaction |
| JP2004333009A (en) * | 2003-05-07 | 2004-11-25 | Nissin Kogyo Kk | Refrigeration unit |
| JP2007212040A (en) * | 2006-02-09 | 2007-08-23 | Mitsubishi Heavy Ind Ltd | Turbo refrigerator and its control method |
| CN101101009A (en) * | 2007-07-30 | 2008-01-09 | 四川美丰化工股份有限公司 | Centrifugal compressor ammonia compressor rapid vibration-prevention method and device |
| GB2454344A (en) * | 2007-11-02 | 2009-05-06 | Shell Int Research | Method and apparatus for controlling a refrigerant compressor, and a method for cooling a hydrocarbon stream. |
| CN102620460B (en) * | 2012-04-26 | 2014-05-07 | 中国石油集团工程设计有限责任公司 | Hybrid refrigeration cycle system and method with propylene pre-cooling |
| JP5865549B2 (en) * | 2012-04-30 | 2016-02-17 | ジョンソン コントロールズ テクノロジー カンパニーＪｏｈｎｓｏｎ Ｃｏｎｔｒｏｌｓ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏｍｐａｎｙ | Control system |
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Address after: 230088 in the high tech Industrial Development Zone, No. 669, Changjiang West Road, Hefei City, Anhui Province Patentee after: EAST CHINA ENGINEERING SCIENCE AND TECHNOLOGY Co.,Ltd. Address before: 230024 No. 70 Wangjiang East Road, Anhui, Hefei Patentee before: EAST CHINA ENGINEERING SCIENCE AND TECHNOLOGY Co.,Ltd. |