CN104567064A - Energy-saving compression refrigeration method - Google Patents
Energy-saving compression refrigeration method Download PDFInfo
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- CN104567064A CN104567064A CN201510005214.2A CN201510005214A CN104567064A CN 104567064 A CN104567064 A CN 104567064A CN 201510005214 A CN201510005214 A CN 201510005214A CN 104567064 A CN104567064 A CN 104567064A
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- compressor
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- compression refrigeration
- energy
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- 238000007906 compression Methods 0.000 title claims abstract description 38
- 230000006835 compression Effects 0.000 title claims abstract description 37
- 238000005057 refrigeration Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000003507 refrigerant Substances 0.000 claims abstract description 51
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 23
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 23
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 23
- 238000004134 energy conservation Methods 0.000 claims description 21
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 10
- 230000006837 decompression Effects 0.000 claims description 8
- 239000007791 liquid phase Substances 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 7
- 238000007701 flash-distillation Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910021529 ammonia Inorganic materials 0.000 claims description 5
- 238000004781 supercooling Methods 0.000 claims description 4
- 239000012071 phase Substances 0.000 claims description 3
- 230000000704 physical effect Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 4
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 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
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
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 refrigeration method.
Background technology
In chemical industry, gaseous refrigerant pressurization condensation throttling refrigeration technology mostly is the cold environment that the unit such as low-temperature rectisol, low temperature oil wash, ammonia synthesis Ammonia separation provide necessary.Traditional industry in producing more adopts two sections of compression refrigerations, delivers to compressor one section of entrance after the gaseous refrigerant of subcooler shell side flash distillation is incorporated to the gaseous refrigerant of cold user flash distillation; Compressor anti-surge loop is drawn from compressor outlet; Flash distillation after liquid refrigerant gravity current to pressure-reducing valve decompression after condensation; The liquid phase refrigerant of compressor each section of entrance separator by transport pump to storage tank.Conventional process techniques has operational stability difference, the shortcoming that energy consumption is higher.
summary of the inventionthe object of this invention is to provide a kind of energy-conservation compression refrigeration method, to solve existing technology Problems existing.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of energy-conservation compression refrigeration method, is characterized in that: from the gaseous refrigerant of cold user, after compressor one section of entrance separator separates the liquid phase of carrying secretly, enters compressor one section of entrance; Gaseous refrigerant after one section, two sections, three sections compressions, first through exporting cooler cooling, then after condenser condenses, liquid refrigerant gravity flows into surge tank, then after decompression, feeding flash tank carries out intermediate flash; Flash tank gas phase sends into compressor three sections of entrances after compressor three sections of entrance separator separatory, flash tank liquid phase is divided into two strands, one sends into subcooler shell side after again reducing pressure, after vacuum flashing absorbs tube side liquid refrigerant heat, after compressor two sections of entrance separator separatory, send into compressor two sections of entrances again, another strand of feeding subcooler tube side through heat exchange cross cold after send user outside; One section, compressor, two sections, three sections and cold user discharge the liquid refrigerant of coming and send into discharge refrigerant vapo(u)rization system, send into compressor one section of entrance and carry out circulation compression refrigeration after thermal medium heating; Compressor anti-surge loop is drawn after compressor outlet cooler, before condenser.
The energy-conservation compression refrigeration method of described one, is characterized in that: described cold-producing medium adopts propylene or ammonia or has the industrial refrigeration medium of similar physical property.
The energy-conservation compression refrigeration method of described one, is characterized in that: three sections of compressions are, the gaseous refrigerant from cold user enters one section, compressor; The gaseous refrigerant of subcooler shell side flash distillation sends into two sections, compressor, and the gaseous refrigerant that flash tank flashes off sends into three sections, compressor.
The energy-conservation compression refrigeration method of described one, is characterized in that: described compressor outlet high temperature liquid refrigerant is first cooled to 50-60 DEG C through outlet cooler, then delivers to downstream through condenser condenses; Compressor anti-surge loop is drawn before cooler post-condenser.
The energy-conservation compression refrigeration method of described one, is characterized in that: the first gravity of described condensator outlet flows into surge tank and after pressure-reducing valve decompression, sends into flash tank again.
The energy-conservation compression refrigeration method of described one, is characterized in that: intermediate flash pressure is 0.3-1.0MPaG.
The energy-conservation compression refrigeration method of described one, is characterized in that: the liquid refrigerant degree of supercooling sending user outside is 5-20 DEG C.
The energy-conservation compression refrigeration method of described one, it is characterized in that: the nucleus equipment of discharge refrigerant vapo(u)rization system is wall-type heat exchange evaporimeter, the isolated liquid refrigerant of compressor each section of entrance separator sends into evaporimeter, by sending into compressor one section of entrance after thermal medium heating and gasifying.
The present invention has following beneficial effect:
(1) cold-producing medium is when meeting user's low temperature requirements, selects the alternative chlorofluoro carbon of ozone layer without impact.
(2) compressor each section of entrance separator is without liquid-phase operation, greatly reduces the risk of suction port of compressor gas carrying liquid.
(3) three sections of compression processes, compressor power consumption is lower.
(4) working off one's feeling vent one's spleen after supercooling of hanging oneself is drawn in compressor anti-surge loop, can reduce the desuperheat amount of liquid refrigerant that anti-surge loop fills into greatly, and when compressor runs under anti-surge valve opening, energy consumption reduces greatly.
(5) cold-producing medium storage tank is incorporated to refrigerating circuit, as liquid refrigerant surge tank, improves the stability of operation.
(6) liquid refrigerant of compressor each section of entrance separator and the discharge of other emission points, returns refrigerating circuit, the simplicity of the operation greatly provided after the evaporation of discharge refrigerant vapo(u)rization system.
Accompanying drawing explanation
Fig. 1 is the energy-conservation compression refrigeration process chart of the present invention.
Detailed description of the invention
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 of entrance separators; K-01, compressor; E-01, outlet cooler; E-02, condenser; E-03, subcooler; E-04, evaporimeter; V-01, flash tank; V-02, surge tank; P-01, delivery pump.
A kind of energy-conservation compression refrigeration method, from the gaseous refrigerant of cold user, after compressor one section of entrance separator separates the liquid phase of carrying secretly, enters compressor one section of entrance; Gaseous refrigerant after one section, two sections, three sections compressions, first through exporting cooler cooling, then after condenser condenses, liquid refrigerant gravity flows into surge tank, then after decompression, feeding flash tank carries out intermediate flash; Flash tank gas phase sends into compressor three sections of entrances after compressor three sections of entrance separator separatory, flash tank liquid phase is divided into two strands, one sends into subcooler shell side after again reducing pressure, after vacuum flashing absorbs tube side liquid refrigerant heat, after compressor two sections of entrance separator separatory, send into compressor two sections of entrances again, another strand of feeding subcooler tube side through heat exchange cross cold after send user outside; One section, compressor, two sections, three sections and cold user discharge the liquid refrigerant of coming and send into discharge refrigerant vapo(u)rization system, send into compressor one section of entrance and carry out circulation compression refrigeration after thermal medium heating; Compressor anti-surge loop is drawn after compressor outlet cooler, before condenser.
Cold-producing medium adopts propylene or ammonia or has the industrial refrigeration medium of similar physical property.
Three sections of compressions are, the gaseous refrigerant from cold user enters one section, compressor; The gaseous refrigerant of subcooler shell side flash distillation sends into two sections, compressor, and the gaseous refrigerant that flash tank flashes off sends into three sections, compressor.
Compressor outlet high temperature liquid refrigerant is first cooled to 50-60 DEG C through outlet cooler, then delivers to downstream through condenser condenses; Compressor anti-surge loop is drawn after cooler, before condenser.
The first gravity of condensator outlet flows into surge tank and after pressure-reducing valve decompression, sends into flash tank 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 the isolated liquid refrigerant of compressor each section of entrance separator sends into evaporimeter, by sending into compressor one section of entrance after thermal medium heating and gasifying.
Cold-producing medium is propylene.From the propylene steam that low-temperature rectisol unit comes, after one section of entrance separator separates the propylene liguid carried secretly, enter one section, compressor.Propylene steam after compression is recycled water-cooled through outlet cooler and condenser and congeals into propylene liguid, sends into propylene surge tank, enters propylene flash tank through decompression.After the propylene steam flashed off in propylene flash tank separates the propylene liguid carried secretly in three sections of entrance separators, enter compressor three sections of entrances.Be divided into two strands from propylene flash drum bottom propylene liguid out, one directly enters the tube side of propylene subcooler, by the low temperature propylene that another burst of vacuum flashing enters propylene subcooler shell side cross cold after go low-temperature rectisol unit to use.From propylene subcooler shell side propylene steam out after two sections of entrance separators separate the propylene liguid carried secretly, enter compressor two sections of entrances.
The isolated propylene liguid of each separator sends into evaporimeter, with the mixture of low-pressure steam and fresh water for thermal medium, sends into one section of entrance separator, return refrigeration system and re-use after propylene liguid gasification.
Concrete technology parameter is in table 1:
Table 1 each logistics post tables of data
Claims (8)
1. an energy-conservation compression refrigeration method, is characterized in that: from the gaseous refrigerant of cold user, after compressor one section of entrance separator separates the liquid phase of carrying secretly, enters compressor one section of entrance; Gaseous refrigerant after one section, two sections, three sections compressions, first through exporting cooler cooling, then after condenser condenses, liquid refrigerant gravity flows into surge tank, then after decompression, feeding flash tank carries out intermediate flash; Flash tank gas phase sends into compressor three sections of entrances after compressor three sections of entrance separator separatory, flash tank liquid phase is divided into two strands, one sends into subcooler shell side after again reducing pressure, after vacuum flashing absorbs tube side liquid refrigerant heat, after compressor two sections of entrance separator separatory, send into compressor two sections of entrances again, another strand of feeding subcooler tube side through heat exchange cross cold after send user outside; One section, compressor, two sections, three sections and cold user discharge the liquid refrigerant of coming and send into discharge refrigerant vapo(u)rization system, send into compressor one section of entrance and carry out circulation compression refrigeration after thermal medium heating; Compressor anti-surge loop is drawn after compressor outlet cooler, before condenser.
2. the energy-conservation compression refrigeration method of one according to claim 1, is characterized in that: described cold-producing medium adopts propylene or ammonia or has the industrial refrigeration medium of similar physical property.
3. the energy-conservation compression refrigeration method of one according to claim 1, it is characterized in that: three sections of compressions are, the gaseous refrigerant from cold user enters one section, compressor; The gaseous refrigerant of subcooler shell side flash distillation sends into two sections, compressor, and the gaseous refrigerant that flash tank flashes off sends into three sections, compressor.
4. the energy-conservation compression refrigeration method of one according to claim 1, is characterized in that: described compressor outlet high temperature liquid refrigerant is first cooled to 50-60 DEG C through outlet cooler, then delivers to downstream through condenser condenses; Compressor anti-surge loop is drawn before cooler post-condenser.
5. the energy-conservation compression refrigeration method of one according to claim 1, is characterized in that: the first gravity of described condensator outlet flows into surge tank and after pressure-reducing valve decompression, sends into flash tank again.
6. the energy-conservation compression refrigeration method of one according to claim 1, is characterized in that: intermediate flash pressure is 0.3-1.0MPaG.
7. the energy-conservation compression refrigeration method of one according to claim 1, is characterized in that: the liquid refrigerant degree of supercooling sending user outside is 5-20 DEG C.
8. the energy-conservation compression refrigeration method of one according to claim 1, it is characterized in that: the nucleus equipment of discharge refrigerant vapo(u)rization system is wall-type heat exchange evaporimeter, the isolated liquid refrigerant of compressor each section of entrance separator sends into evaporimeter, by sending into compressor one section of entrance 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 |
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| 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 true CN104567064A (en) | 2015-04-29 |
| CN104567064B CN104567064B (en) | 2017-02-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106052175A (en) * | 2016-05-27 | 2016-10-26 | 中石化宁波工程有限公司 | Energy-saving composite refrigerating device and refrigerating method |
| CN110005944A (en) * | 2019-04-23 | 2019-07-12 | 内蒙古博大实地化学有限公司 | A kind of energy-saving consumption-reducing type freezing ammonia transportation system |
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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 |
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| CN110005944A (en) * | 2019-04-23 | 2019-07-12 | 内蒙古博大实地化学有限公司 | A kind of energy-saving consumption-reducing type freezing ammonia transportation system |
| 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 | Publication date |
|---|---|
| CN104567064B (en) | 2017-02-22 |
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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. |