CN205090721U - Four component cryogens high pressure throttle refrigerating fluid ization natural gas system - Google Patents
Four component cryogens high pressure throttle refrigerating fluid ization natural gas system Download PDFInfo
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- CN205090721U CN205090721U CN201520824524.2U CN201520824524U CN205090721U CN 205090721 U CN205090721 U CN 205090721U CN 201520824524 U CN201520824524 U CN 201520824524U CN 205090721 U CN205090721 U CN 205090721U
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 234
- 239000003345 natural gas Substances 0.000 title claims abstract description 120
- 238000005243 fluidization Methods 0.000 title abstract 2
- 239000003949 liquefied natural gas Substances 0.000 claims abstract description 17
- 238000007906 compression Methods 0.000 claims abstract description 10
- 230000008676 import Effects 0.000 claims abstract description 10
- 238000005057 refrigeration Methods 0.000 claims description 20
- 230000006835 compression Effects 0.000 claims description 8
- 239000007791 liquid phase Substances 0.000 claims description 6
- 238000010992 reflux Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 8
- 239000012071 phase Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000470 constituent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- SEPPVOUBHWNCAW-FNORWQNLSA-N (E)-4-oxonon-2-enal Chemical compound CCCCCC(=O)\C=C\C=O SEPPVOUBHWNCAW-FNORWQNLSA-N 0.000 description 1
- LLBZPESJRQGYMB-UHFFFAOYSA-N 4-one Natural products O1C(C(=O)CC)CC(C)C11C2(C)CCC(C3(C)C(C(C)(CO)C(OC4C(C(O)C(O)C(COC5C(C(O)C(O)CO5)OC5C(C(OC6C(C(O)C(O)C(CO)O6)O)C(O)C(CO)O5)OC5C(C(O)C(O)C(C)O5)O)O4)O)CC3)CC3)=C3C2(C)CC1 LLBZPESJRQGYMB-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000003434 inspiratory effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000005514 two-phase flow Effects 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
- F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
- F25J1/0022—Hydrocarbons, e.g. natural gas
-
- 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
- F25J1/0055—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 originating from an incorporated cascade
-
- 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
- F25J1/0211—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 using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle
- F25J1/0212—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 using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle as a single flow MCR cycle
-
- 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)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The utility model discloses a four component cryogens high pressure throttle refrigerating fluid ization natural gas system, including natural gas subcooler, natural gas precooler, the mixed cryogen separator of high -pressure separator and low temperature, be connected with the natural gas liquefaction ware between natural gas subcooler and the natural gas precooler, one -level entry separator has connected gradually between the lower extreme of natural gas precooler and the high -pressure separator, the single -stage -compression machine, intercooler, second grade entry buffer tank, split -compressor, the cooler, the pipeline on high -pressure separator top passes natural gas precooler and connects the mixed cryogen separator of low temperature, be connected with the hot blow pipeline between the export of single -stage -compression machine and the one -level entry separator, be connected with reflux pipeline between top export of second grade entry buffer tank and the import of one -level entry separator. The utility model discloses rational in infrastructure, the power consumption is few, can effectively reduce the liquefied natural gas temperature, mixes the cryogen high -usage.
Description
Technical field
The utility model relates to natural gas manufacturing technology field, specifically a kind of Four composition cryogen high pressure throttling refrigeration liquefied natural gas system.
Background technology
Along with the development of society, liquefied natural gas is widely used in the field such as natural gas peak-shaving, motor vehicle fuel as a kind of clean energy resource.The volume of liquefied natural gas is only 1/625 of raw natural gas state, and volume energy density is 75% of gasoline, and therefore liquefied natural gas can reduce storage and cost of transportation, and calorific value is higher.
Natural gas liquefaction refrigeration system is roughly divided into: azeotrope refrigeration system, expander refrigeration system, stage refrigeration system, high pressure throttle refrigeration system.At present, natural gas liquefaction plant is mainly based on azeotrope refrigeration system, and conventional is five kinds of component refrigerant cycle refrigeration liquefying natural gases.And mixed refrigeration natural gas liquefaction system also exists a lot of defects, as complicated in technological process, quantities is large, open parking procedure's complexity, energy consumption is large, and the utilization rate of azeotrope is low, and the damaged condition of compressor is large.
Utility model content
The purpose of this utility model is to provide a kind of Four composition cryogen high pressure throttling refrigeration liquefied natural gas system, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of Four composition cryogen high pressure throttling refrigeration liquefied natural gas system, comprise natural gas subcooler, natural gas forecooler, high-pressure separator and low-temperature mixed cryogen separator, natural gas liquefaction device is connected with between described natural gas subcooler and natural gas forecooler, one-level entrance separator is connected with in turn between the lower end of described natural gas forecooler and high-pressure separator, stage compressor, intercooler, secondary inlet surge tank, split-compressor, cooler, the pipeline that the outlet of high-pressure separator top connects is connected in the middle of the sidewall of low-temperature mixed cryogen separator through natural gas forecooler, the outlet of high-pressure separator lower end to be connected in the import of secondary inlet surge tank by pipeline and pipeline to be provided with liquid phase throttling dropping valve, the outlet of high-pressure separator top to be connected in the import of secondary inlet surge tank by pipeline and pipeline to be provided with two-stage compression return valve, the pipeline of secondary inlet surge tank lower end outlet is connected to the sidewall upper of natural gas forecooler through natural gas forecooler, and is provided with one-level J-T valve through on the pipeline of natural gas forecooler, the sidewall upper being connected to natural gas subcooler successively through natural gas liquefaction device, natural gas subcooler of described low-temperature mixed cryogen separator top outlet line, and through on the pipeline of natural gas subcooler, three grades of J-T valves are installed, described low-temperature mixed cryogen separator bottom end outlet pipeline is connected in the middle of the sidewall of natural gas liquefaction device through natural gas liquefaction device, and is provided with secondary J-T valve through on the pipeline of natural gas liquefaction device, the outlet of described stage compressor is connected on the sidewall of one-level entrance separator by pipeline, and pipeline is provided with hot blow valve, the outlet of described secondary inlet surge tank top is connected in the import of one-level entrance separator by pipeline, and pipeline is provided with one stage of compression return valve.
As further program of the utility model: described natural gas subcooler is connected with natural gas outlet-pipe, described natural gas forecooler is connected with natural gas inlet wire pipe.
As the utility model further scheme: the side wall lower ends of described natural gas subcooler is connected in the middle of the sidewall of natural gas liquefaction device by pipeline, the side wall lower ends of natural gas liquefaction device is connected to the sidewall upper of natural gas forecooler by pipeline.
Compared with prior art, the beneficial effects of the utility model are:
1, the utility model consumes less energy consumption compared to other Refrigeration Techniques and effectively can reduce LNG temperature;
2, on the basis of traditional five component cryogen refrigerations, decrease a kind of component cryogen, simplify technological process and start-stop car complexity;
3, high pressure throttling refrigeration is freezed with azeotrope combine, integrate both advantages.Make the cryogen of identical amount provide more cold, effectively reduce liquefaction energy consumption and LNG temperature;
4, to efficiently solve mixed cryogen heavy constituent Yin Wendu low in the increase of hot blow line, and evaporating capacity is low, the problem that utilization rate is low;
5, the phenomenon adding available protecting compressor surge infringement compressor because inspiratory capacity is very few of reflux pipeline.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of Four composition cryogen high pressure throttling refrigeration liquefied natural gas system.
In figure: 1-natural gas subcooler; 2-natural gas liquefaction device; 3-natural gas forecooler; 4-one-level entrance separator; 5-secondary inlet surge tank; 6-high-pressure separator; 7-low-temperature mixed cryogen separator; 8-intercooler; 9-cooler; 10-stage compressor; 11-split-compressor; 12-tri-grades of J-T valves; 13-secondary J-T valve; 14-one-level J-T valve; 15-hot blow valve; 16-one stage of compression return valve; 17-liquid phase throttling dropping valve; 18-two-stage compression return valve.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of Four composition cryogen high pressure throttling refrigeration liquefied natural gas system, comprise natural gas subcooler 1, natural gas forecooler 3, high-pressure separator 6 and low-temperature mixed cryogen separator 7, natural gas liquefaction device 2 is connected with between natural gas subcooler 1 and natural gas forecooler 3, natural gas subcooler 1 is connected with natural gas outlet-pipe, natural gas forecooler 3 is connected with natural gas inlet wire pipe, the side wall lower ends of natural gas subcooler 1 is connected in the middle of the sidewall of natural gas liquefaction device 2 by pipeline, the side wall lower ends of natural gas liquefaction device 2 is connected to the sidewall upper of natural gas forecooler 1 by pipeline.
One-level entrance separator 4 is connected with in turn between the lower end of natural gas forecooler 1 and high-pressure separator 6, stage compressor 10, intercooler 8, secondary inlet surge tank 5, split-compressor 11, cooler 9, the pipeline that the outlet of high-pressure separator 6 top connects is connected in the middle of the sidewall of low-temperature mixed cryogen separator 7 through natural gas forecooler 1, the outlet of high-pressure separator 6 lower end to be connected in secondary inlet surge tank 5 import by pipeline and pipeline to be provided with liquid phase throttling dropping valve 17, the outlet of high-pressure separator 6 top to be connected in secondary inlet surge tank 5 import by pipeline and pipeline to be provided with two-stage compression return valve 18.The outlet of stage compressor 10 is connected to one-level entrance separator 4 sidewall by pipeline pipeline is provided with hot blow valve 15; The outlet of secondary inlet surge tank 5 top is connected in the import of one-level entrance separator 4 by pipeline, and pipeline is provided with one stage of compression return valve 16.
The pipeline of secondary inlet surge tank 5 lower end outlet is connected to the sidewall upper of natural gas forecooler 1 through natural gas forecooler 1, and is provided with one-level J-T valve 14 through on the pipeline of natural gas forecooler 1; The sidewall upper being connected to natural gas subcooler 1 successively through natural gas liquefaction device 2, natural gas subcooler 1 of low-temperature mixed cryogen separator 7 top outlet line, and through on the pipeline of natural gas subcooler 1, three grades of J-T valves 12 are installed; Low-temperature mixed cryogen separator 7 bottom end outlet pipeline is connected in the middle of the sidewall of natural gas liquefaction device 2 through natural gas liquefaction device 2, and is provided with secondary J-T valve 13 through on the pipeline of natural gas liquefaction device 2.
Operation principle of the present utility model is:
Four kinds of cryogens that present system uses comprise nitrogen, methane, ethene and butane.
The azeotrope of natural gas forecooler 1 shell side, pressure is 0.4MPa, temperature about 17 DEG C, after one-level entrance separator 4 is separated, gas phase enters the entrance of stage compressor 10, be pressurized to 2.7MPa, after intercooler 8 air cooling to 42 DEG C, enter secondary inlet surge tank 5 and be separated, isolated gas phase enters the entrance of split-compressor 11, outlet pressure increases to 5.7MPa, utilizes cooler 9 sky to be cooled to 42 DEG C, enters in high-pressure separator 6 and be separated.
Liquid phase throttling from high-pressure separator 6 is depressurized to about 2.7MPa, is mixed into secondary inlet surge tank 5 with the two phase flow coming from intercooler 8, and secondary inlet surge tank 5 is as the surge tank of cryogen heavy constituent.The isolated liquid hydrocarbon of secondary inlet surge tank 5 (HMR) enters natural gas forecooler 1 tube side, these azeotrope heavy constituents are cooled to-38 DEG C, the shell side of natural gas forecooler 1 is entered again, for natural gas cooler provides cold after one-level J-T valve 14 throttling expansion cooling.
The isolated gas phase of high-pressure separator 6 is at natural gas forecooler 1 partial condensation, and temperature is down to-38 DEG C, enters in low-temperature mixed cryogen separator 7 and is separated; Isolated liquid phase (MMR) deep cooling in natural gas liquefaction device 2 is cooled to about-118 DEG C, the shell side of natural gas liquefaction device 2 is entered again after secondary J-T valve 13 throttling expansion cooling, for natural gas liquefaction device 2 provides cold, and flowed out by the bottom of natural gas liquefaction device 2, enter the shell side of natural gas forecooler 1, converge for natural gas forecooler 1 provides cold with the HMR of shell side.
The isolated gas phase of low-temperature mixed cryogen separator 7 (LMR), condensation in natural gas liquefaction device 2, and excessively about-166 DEG C are chilled in natural gas subcooler 2, the shell side of natural gas liquefaction device 2 is entered after the throttling of secondary J-T valve 13, for natural gas subcooler 3 provides cold, and flowed out by the bottom of natural gas subcooler 3, enter the shell side of natural gas liquefaction device 2, converge with the MMR of shell side, for natural gas liquefaction device 2 provides cold; Flowed out by the bottom of natural gas liquefaction device 2 again, enter the shell side of natural gas forecooler 1, converge with the HMR of shell side, for natural gas forecooler 1 provides cold.
The cryogen that heat exchange completes, then return one-level entrance separator 4, enter in stage compressor and compress, enter next circulation.
First natural gas by natural gas forecooler 1 heat exchange, makes natural gas temperature be down to-38 DEG C by 38 DEG C; Liquefy through natural gas liquefaction device 2, temperature reduces to-118 DEG C again; Enter natural gas subcooler 3 again, temperature reduces to-166 DEG C, enters LNG tank finally by after the decompression of liquefied natural gas choke valve.
The outlet line of stage compressor 10 has a hot blow pipeline be connected at the bottom of the tank of one-level entrance separator 4, effect is the liquefied heavy refrigerant components that the high temperature cryogen after utilizing a section to compress gasifies at the bottom of one-level entrance separator 4 tank.
Secondary inlet surge tank 5 outlet line has a reflux pipeline to be connected with one-level entrance separator 4 suction line, effect is that isolated for secondary inlet surge tank 5 gas phase cryogen is transported in one-level entrance separator 4, to increase the gas flow of stage compressor 10 entrance, anti-Zhichuan shake phenomenon occurs.
High-pressure separator 6 outlet line has a reflux pipeline to be connected with secondary inlet surge tank 5 suction line, effect is that isolated for high-pressure separator 6 gas phase cryogen is transported in secondary inlet surge tank 5, to increase the gas flow of split-compressor 11 entrance, anti-Zhichuan shake phenomenon occurs.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this description is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of description is only for clarity sake, those skilled in the art should by description integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (3)
1. a Four composition cryogen high pressure throttling refrigeration liquefied natural gas system, comprise natural gas subcooler, natural gas forecooler, high-pressure separator and low-temperature mixed cryogen separator, natural gas liquefaction device is connected with between described natural gas subcooler and natural gas forecooler, it is characterized in that, one-level entrance separator is connected with in turn between the lower end of described natural gas forecooler and high-pressure separator, stage compressor, intercooler, secondary inlet surge tank, split-compressor, cooler, the pipeline that the outlet of high-pressure separator top connects is connected in the middle of the sidewall of low-temperature mixed cryogen separator through natural gas forecooler, the outlet of high-pressure separator lower end to be connected in the import of secondary inlet surge tank by pipeline and pipeline to be provided with liquid phase throttling dropping valve, the outlet of high-pressure separator top to be connected in the import of secondary inlet surge tank by pipeline and pipeline to be provided with two-stage compression return valve, the pipeline of secondary inlet surge tank lower end outlet is connected to the sidewall upper of natural gas forecooler through natural gas forecooler, and is provided with one-level J-T valve through on the pipeline of natural gas forecooler, the sidewall upper being connected to natural gas subcooler successively through natural gas liquefaction device, natural gas subcooler of described low-temperature mixed cryogen separator top outlet line, and through on the pipeline of natural gas subcooler, three grades of J-T valves are installed, described low-temperature mixed cryogen separator bottom end outlet pipeline is connected in the middle of the sidewall of natural gas liquefaction device through natural gas liquefaction device, and is provided with secondary J-T valve through on the pipeline of natural gas liquefaction device, the outlet of described stage compressor is connected on the sidewall of one-level entrance separator by pipeline, and pipeline is provided with hot blow valve, the outlet of described secondary inlet surge tank top is connected in the import of one-level entrance separator by pipeline, and pipeline is provided with one stage of compression return valve.
2. Four composition cryogen high pressure throttling refrigeration liquefied natural gas system according to claim 1, is characterized in that, described natural gas subcooler is connected with natural gas outlet-pipe, described natural gas forecooler is connected with natural gas inlet wire pipe.
3. Four composition cryogen high pressure throttling refrigeration liquefied natural gas system according to claim 1, it is characterized in that, the side wall lower ends of described natural gas subcooler is connected in the middle of the sidewall of natural gas liquefaction device by pipeline, the side wall lower ends of natural gas liquefaction device is connected to the sidewall upper of natural gas forecooler by pipeline.
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| CN201520824524.2U CN205090721U (en) | 2015-10-24 | 2015-10-24 | Four component cryogens high pressure throttle refrigerating fluid ization natural gas system |
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| CN201520824524.2U CN205090721U (en) | 2015-10-24 | 2015-10-24 | Four component cryogens high pressure throttle refrigerating fluid ization natural gas system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865145A (en) * | 2016-04-22 | 2016-08-17 | 晋城华港燃气有限公司 | Coalbed methane liquefaction process |
| CN110044131A (en) * | 2019-05-06 | 2019-07-23 | 郑州轻工业学院 | A kind of multi-stage compression propane pre-cooling natural gas liquefaction system and its liquifying method |
| CN111023620A (en) * | 2018-10-09 | 2020-04-17 | 山东新华能节能科技有限公司 | Vortex type air source heat pump two-stage system |
-
2015
- 2015-10-24 CN CN201520824524.2U patent/CN205090721U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865145A (en) * | 2016-04-22 | 2016-08-17 | 晋城华港燃气有限公司 | Coalbed methane liquefaction process |
| CN105865145B (en) * | 2016-04-22 | 2019-08-09 | 晋城华港燃气有限公司 | A kind of coal gas gasification technique |
| CN111023620A (en) * | 2018-10-09 | 2020-04-17 | 山东新华能节能科技有限公司 | Vortex type air source heat pump two-stage system |
| CN110044131A (en) * | 2019-05-06 | 2019-07-23 | 郑州轻工业学院 | A kind of multi-stage compression propane pre-cooling natural gas liquefaction system and its liquifying method |
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Inventor after: Zhang Mingliang Inventor after: Qiang Long Inventor after: Wang Wenkang Inventor before: Fan Liao Inventor before: Wang Lei Inventor before: Li Shengzhao |
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