CN213841515U - Helium refrigeration and liquefaction system - Google Patents
Helium refrigeration and liquefaction system Download PDFInfo
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- CN213841515U CN213841515U CN202023003944.4U CN202023003944U CN213841515U CN 213841515 U CN213841515 U CN 213841515U CN 202023003944 U CN202023003944 U CN 202023003944U CN 213841515 U CN213841515 U CN 213841515U
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- 239000001307 helium Substances 0.000 title claims abstract description 143
- 229910052734 helium Inorganic materials 0.000 title claims abstract description 143
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 title claims abstract description 143
- 238000005057 refrigeration Methods 0.000 title claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 61
- 238000001816 cooling Methods 0.000 claims abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 26
- 229910052757 nitrogen Inorganic materials 0.000 claims description 13
- 239000012071 phase Substances 0.000 claims description 7
- 239000007791 liquid phase Substances 0.000 claims description 6
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 230000008676 import Effects 0.000 abstract description 3
- 239000007792 gaseous phase Substances 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 description 9
- 239000007789 gas Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005034 decoration Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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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
- F25J1/0005—Light or noble gases
- F25J1/0007—Helium
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/06—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using expanders
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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
- F25J1/003—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
- F25J1/0032—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 the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
- F25J1/0035—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 the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by gas expansion with extraction of work
- F25J1/0037—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 the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by gas expansion with extraction of work of a return stream
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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
- F25J1/003—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
- F25J1/0032—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 the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
- F25J1/004—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 the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by flash gas recovery
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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
- F25J1/02—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
- F25J1/0221—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 the cold stored in an external cryogenic component in an open refrigeration loop
- F25J1/0224—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 the cold stored in an external cryogenic component in an open refrigeration loop in combination with an internal quasi-closed refrigeration 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
- 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
- F25J1/0228—Coupling of the liquefaction unit to other units or processes, so-called integrated processes
- F25J1/0235—Heat exchange integration
- F25J1/0236—Heat exchange integration providing refrigeration for different processes treating not the same feed stream
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/04—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in series
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B6/00—Compression machines, plants or systems, with several condenser circuits
- F25B6/04—Compression machines, plants or systems, with several condenser circuits arranged in series
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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
- F25J2210/00—Processes characterised by the type or other details of the feed stream
- F25J2210/42—Nitrogen
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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
- F25J2270/00—Refrigeration techniques used
- F25J2270/04—Internal refrigeration with work-producing gas expansion loop
- F25J2270/06—Internal refrigeration with work-producing gas expansion loop with multiple gas expansion loops
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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 utility model discloses a helium refrigeration and liquefied system, including helium compressor and choke valve, liquid helium storage tank, the gaseous phase export of liquid helium storage tank and the import intercommunication of helium compressor to make by the helium backward flow after the choke valve throttle cooling to helium compressor, helium refrigeration and liquefied system still includes one-level expander, second grade expander. The technical scheme of the utility model have the energy consumption low, advantages such as stable performance.
Description
Technical Field
The utility model relates to a chemical industry field mainly relates to a helium refrigeration and liquefied system.
Technical Field
In the chemical field, a cryopump is generally used to produce vacuum of an ultrahigh vacuum system, and the ultrahigh vacuum is maintained by using the huge pumping capacity of a cryocooler at a low temperature, while the cryocooler needs to work in a liquid helium temperature region, which needs a large amount of high-quality liquid helium, and a common helium refrigeration and liquefaction system has a complex structure, high energy consumption and low efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a helium refrigeration and liquefaction system with low energy consumption and stable performance.
The helium refrigeration and liquefaction system of the utility model comprises a helium compressor and a throttle valve, wherein the outlet of the helium compressor is communicated with the inlet of the throttle valve through a first pipeline, the outlet of the throttle valve is communicated with a liquid helium storage tank through a pipeline, the gas phase outlet of the liquid helium storage tank is communicated with the inlet of the helium compressor through a second pipeline, so that the helium throttled and cooled by the throttle valve flows back to the helium compressor, the first pipeline passes through a first-stage heat exchanger, a second-stage heat exchanger, a third-stage heat exchanger, a fourth-stage heat exchanger, a fifth-stage heat exchanger and a sixth-stage heat exchanger, the second pipeline passes through a sixth-stage heat exchanger, a fifth-stage heat exchanger, a fourth-stage heat exchanger, a third-stage heat exchanger, a second-stage heat exchanger and a first-stage heat exchanger, the liquid phase outlet of the liquid helium storage tank is connected with the second pipeline between the sixth-stage heat exchanger and the fifth-stage heat exchanger through a third pipeline, the third pipeline passes through a six-stage heat exchanger, the helium refrigerating and liquefying system further comprises a first-stage expander and a second-stage expander, an air inlet pipe of the first-stage expander is connected to the first pipeline, an air outlet pipe of the first-stage expander is connected with an air inlet of the second-stage expander, and an air outlet pipe of the second-stage expander is connected to a third pipeline between the liquid helium storage tank and the six-stage heat exchanger.
The utility model discloses a helium refrigeration and liquefied system, wherein, the intake-tube connection of one-level expander is on the first pipeline between second grade heat exchanger, tertiary heat exchanger.
The utility model discloses a helium refrigeration and liquefied system, wherein, the outlet duct of one-level expander is through level four heat exchanger.
The utility model discloses a helium refrigeration and liquefied system, wherein, still include a cryogenic pump system, a cryogenic pump system installs on the third pipeline between liquid helium storage tank and six grade heat exchangers.
The utility model discloses a helium refrigeration and liquefied system, wherein, still include the precooling pipeline, the precooling pipeline passes through one-level heat exchanger to make the liquid nitrogen in the precooling pipeline be the precooling of one-level heat exchanger.
The utility model discloses a helium refrigeration and liquefied system, wherein, still include the fourth pipeline, the one end on fourth pipeline connect in on the outlet duct of second grade expander, the other end on the fourth pipeline is connected on the second pipeline between six heat exchangers and five heat exchangers.
The helium refrigeration and liquefaction system of the utility model comprises a helium compressor and a throttle valve, wherein the outlet of the helium compressor is communicated with the inlet of the throttle valve through a first pipeline, the outlet of the throttle valve is communicated with a liquid helium storage tank through a pipeline, the gas phase outlet of the liquid helium storage tank is communicated with the inlet of the helium compressor through a second pipeline, so that the helium throttled and cooled by the throttle valve flows back to the helium compressor, the first pipeline passes through a first-stage heat exchanger, a second-stage heat exchanger, a third-stage heat exchanger, a fourth-stage heat exchanger and a fifth-stage heat exchanger, the second pipeline passes through a fifth-stage heat exchanger, a fourth-stage heat exchanger, a third-stage heat exchanger and a first-stage heat exchanger, the liquid phase outlet of the liquid helium storage tank is connected with the second pipeline between the fifth-stage heat exchanger and the fourth-stage heat exchanger through a third pipeline, the helium refrigeration and liquefaction system further comprises a first-stage expander and a second-stage expander, wherein an air inlet pipe of the first-stage expander is connected to the first pipeline, an air outlet pipe of the first-stage expander is connected to an air inlet of the second-stage expander, an air outlet pipe of the second-stage expander is connected to a third pipeline between the liquid helium storage tank and the fifth-stage heat exchanger, an air inlet pipe of the first-stage expander is connected to the first pipeline between the first-stage heat exchanger and the second-stage heat exchanger, the helium refrigeration and liquefaction system further comprises a first low-temperature pump system, and the first low-temperature pump system is installed on the third pipeline between the liquid helium storage tank and the fifth-stage heat exchanger.
The utility model discloses a helium refrigeration and liquefied system, wherein, still include second cryogenic pump system, second cryogenic pump system installs on the outlet duct of one-level expander.
The utility model discloses a helium refrigeration and liquefied system, wherein, the outlet duct of one-level expander is through tertiary heat exchanger.
The technical scheme of the utility model have the energy consumption low, advantages such as stable performance.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of a helium refrigeration and liquefaction system of the present invention;
fig. 2 is a schematic structural diagram of a first embodiment of the helium refrigeration and liquefaction system of the present invention.
Detailed Description
Example one
As shown in FIG. 1, the utility model discloses a helium refrigeration and liquefaction system, including helium compressor C1 and choke valve V3, the export of helium compressor is through the import intercommunication of first pipeline 1 with the choke valve, the export of choke valve is through pipeline and liquid helium storage tank V1 intercommunication, the gaseous phase export of liquid helium storage tank is through the import intercommunication of second pipeline 2 with helium compressor, so that the helium after being throttled and cooled by the choke valve flows back to helium compressor, first pipeline is through one-level heat exchanger E1, second grade heat exchanger E2, third grade heat exchanger E3, fourth grade heat exchanger E4, fifth grade heat exchanger E5, six grade heat exchanger E6, the second pipeline is through six grade heat exchanger, five grade heat exchanger, fourth grade heat exchanger, third grade heat exchanger, second grade heat exchanger, one-level heat exchanger, the liquid phase export of liquid helium storage tank is through third pipeline and six grade heat exchanger, The second pipeline between the five-stage heat exchangers is connected, the third pipeline passes through the six-stage heat exchanger, the helium refrigerating and liquefying system further comprises a first-stage expander T1 and a second-stage expander T2, an air inlet pipe of the first-stage expander is connected to the first pipeline, an air outlet pipe of the first-stage expander is connected with an air inlet of the second-stage expander, and an air outlet pipe of the second-stage expander is connected to the third pipeline between the liquid helium storage tank and the six-stage heat exchanger.
The utility model discloses a helium refrigeration and liquefied system, wherein, the intake-tube connection of one-level expander is on the first pipeline between second grade heat exchanger, tertiary heat exchanger.
The utility model discloses a helium refrigeration and liquefied system, wherein, the outlet duct of one-level expander is through level four heat exchanger.
The utility model discloses a helium refrigeration and liquefied system, wherein, still include first cryogenic pump system F2, first cryogenic pump system is installed on the third pipeline between liquid helium storage tank and the six-stage heat exchanger.
The utility model discloses a helium refrigeration and liquefied system, wherein, still include the precooling pipeline, the precooling pipeline passes through one-level heat exchanger to make the liquid nitrogen in the precooling pipeline be the precooling of one-level heat exchanger.
The utility model discloses a helium refrigeration and liquefied system, wherein, still include fourth pipeline L1, the one end of fourth pipeline is connected on the outlet duct of second grade expander, and the other end of fourth pipeline is connected on the second pipeline between six heat exchangers and five heat exchangers.
Liquid nitrogen is adopted for precooling, and when liquid helium is produced, the implementation process is as follows:
the low-pressure helium enters a helium compressor C1 for pressurization, is sequentially cooled by a first-stage heat exchanger E1 and a second-stage heat exchanger E2 and then is divided into two streams, one stream of helium enters a first-stage expander T1 for expansion, temperature and pressure reduction, then enters a fourth-stage heat exchanger E4 for temperature reduction, enters a second-stage expander T2 for expansion, temperature and pressure reduction, and returns to a fifth-stage heat exchanger E5 through a fourth pipeline L1. And the other helium enters a third-stage heat exchanger E3, a fourth-stage heat exchanger E4, a fifth-stage heat exchanger E5 and a sixth-stage heat exchanger E6 in sequence to be cooled, is decompressed through a throttle valve V3, the helium in a gas-liquid two-phase state enters a liquid helium storage tank V1, the helium in the liquid helium storage tank returns to the fifth-stage heat exchanger after entering the sixth-stage heat exchanger for rewarming, one part of the liquid helium in the liquid helium storage tank is conveyed out, the other part of the liquid helium enters a first cryogenic pump system F2 to provide cold for a cryogenic pump, then returns to the sixth-stage heat exchanger E6, the finally converged helium returns to the compressor inlet after sequentially passing through the fifth-stage heat exchanger, the fourth-stage heat exchanger, the third-stage heat exchanger, the second-stage heat exchanger and the first-stage heat exchanger.
The primary heat exchanger E1 is precooled by liquid nitrogen, the liquid nitrogen N1 enters the heat exchanger, and after heat exchange and rewarming, the gas nitrogen N2 is discharged from the heat exchanger.
Liquid nitrogen is adopted for precooling, and when liquid helium is not produced, the implementation process is as follows:
the low-pressure helium enters a helium compressor C1 for pressurization, sequentially passes through a first-stage heat exchanger E1 and a second-stage heat exchanger E2 for cooling, then completely enters a first-stage expander T1 for expansion, temperature and pressure reduction, then enters a fourth-stage heat exchanger E4 for cooling, then enters a second-stage expander T2 for expansion, temperature and pressure reduction, enters a first low-temperature pump system F2 through a pipeline L2, returns to a sixth-stage heat exchanger E6 after providing cold for the helium, then sequentially passes through a fifth-stage heat exchanger, a fourth-stage heat exchanger, a third-stage heat exchanger, a second-stage heat exchanger and a first-stage heat exchanger for rewarming, and finally returns to an inlet of the helium compressor.
The primary heat exchanger E1 is precooled by liquid nitrogen, the liquid nitrogen N1 enters the heat exchanger, and after heat exchange and rewarming, the gas nitrogen N2 is discharged from the heat exchanger.
Example two
As shown in the combined figure 2, the helium refrigerating and liquefying system of the utility model comprises a helium compressor C1 and a throttle valve V3, the outlet of the helium compressor is communicated with the inlet of the throttle valve through a first pipeline 1, the outlet of the throttle valve is communicated with a liquid helium storage tank V1 through a pipeline, the gas phase outlet of the liquid helium storage tank is communicated with the inlet of the helium compressor through a second pipeline, so that the helium gas throttled and cooled by the throttle valve flows back to the helium compressor, the first pipeline 1 passes through a first-stage heat exchanger E1, a second-stage heat exchanger E2, a third-stage heat exchanger E3, a fourth-stage heat exchanger E4, a fifth-stage heat exchanger E5, the second pipeline 2 passes through a fifth-stage heat exchanger, a fourth-stage heat exchanger, a third-stage heat exchanger, a second-stage heat exchanger, a first-stage heat exchanger, the liquid phase outlet of the liquid helium storage tank passes through a third pipeline 3 and the fifth-stage heat exchanger, the second pipeline 2 between the fourth-stage heat exchangers is connected, the third pipeline passes through a fifth-stage heat exchanger, the helium refrigeration and liquefaction system further comprises a first-stage expansion machine T1 and a second-stage expansion machine T2, an air inlet pipe of the first-stage expansion machine is connected to the first pipeline, an air outlet pipe of the first-stage expansion machine is connected with an air inlet of the second-stage expansion machine, an air outlet pipe of the second-stage expansion machine is connected to a third pipeline between the liquid helium storage tank and the fifth-stage heat exchanger, an air inlet pipe of the first-stage expansion machine is connected to the first pipeline between the first-stage heat exchanger and the second-stage heat exchanger, the helium refrigeration and liquefaction system further comprises a first low-temperature pump system F2, and the first low-temperature pump system is installed on the third pipeline between the liquid helium storage tank and the fifth-stage heat exchanger.
The utility model discloses a helium refrigeration and liquefied system, wherein, the intake-tube connection of one-level expander is on the first pipeline between one-level heat exchanger, second grade heat exchanger.
The utility model discloses a helium refrigeration and liquefied system, wherein, still include second cryopump system F1, second cryopump system installs on the outlet duct of one-level expander.
The utility model discloses a helium refrigeration and liquefied system, wherein, the outlet duct of one-level expander is through tertiary heat exchanger.
Liquid nitrogen precooling is not adopted, and when liquid helium is produced, the implementation process is as follows:
the low-pressure helium enters a helium compressor C1 for pressurization, is cooled by a first-stage heat exchanger E1, is divided into two streams, one stream of helium enters a first-stage expander T1 for expansion, temperature and pressure reduction, provides cold energy for a low-temperature pump in an 80K temperature region, enters a third-stage heat exchanger E3 for cooling, enters a second-stage expander T2 for expansion, temperature and pressure reduction, and returns to a fourth-stage heat exchanger E4 through a fourth pipeline L1. And the other helium enters a second-stage heat exchanger E2, a third-stage heat exchanger E3, a fourth-stage heat exchanger E4 and a fifth-stage heat exchanger E5 in sequence to be cooled, is decompressed through a throttle valve V3, helium in a gas-liquid two-phase state enters a liquid helium storage tank V1, the helium in the liquid helium storage tank returns to the fourth-stage heat exchanger after entering the fifth-stage heat exchanger for rewarming, one part of the liquid helium in the liquid helium storage tank is conveyed out, the other part of the liquid helium enters a first cryogenic pump system F2 to provide cold for a cryogenic pump, then returns to the fifth-stage heat exchanger E5, and finally, the converged helium returns to the helium compressor inlet after sequentially passing through the fourth-stage heat exchanger, the third-stage heat exchanger, the second-stage heat exchanger and the first-stage heat exchanger.
Example 4, without liquid nitrogen pre-cooling and liquid helium production, the implementation process was as follows:
the low-pressure helium enters a helium compressor C1 for pressurization, is cooled by a first-stage heat exchanger E1, then enters a first-stage expansion machine T1 for expansion, temperature and pressure reduction, provides cold for a low-temperature pump in an 80K temperature region, enters a third-stage heat exchanger E3 for cooling, enters a second-stage expansion machine T2 for expansion, temperature and pressure reduction, enters a first low-temperature pump system F2 for providing cold for the low-temperature pump by a pipeline L2, returns to a fifth-stage heat exchanger, a fourth-stage heat exchanger, a third-stage heat exchanger, a second-stage heat exchanger and a first-stage heat exchanger for rewarming, and finally returns to the inlet of the compressor.
The technical scheme of the utility model have the energy consumption low, advantages such as stable performance.
The heat exchanger can be a plate-fin heat exchanger or a wound tube heat exchanger. The helium compressor may be a screw, piston compressor. The turbine expander may be a piston expander or a screw expander.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A helium refrigerating and liquefying system is characterized by comprising a helium compressor and a throttle valve, wherein an outlet of the helium compressor is communicated with an inlet of the throttle valve through a first pipeline, an outlet of the throttle valve is communicated with a liquid helium storage tank through a pipeline, a gas-phase outlet of the liquid helium storage tank is communicated with the inlet of the helium compressor through a second pipeline so that helium throttled and cooled by the throttle valve flows back to the helium compressor, the first pipeline passes through a first-stage heat exchanger, a second-stage heat exchanger, a third-stage heat exchanger, a fourth-stage heat exchanger, a fifth-stage heat exchanger and a sixth-stage heat exchanger, the second pipeline passes through the sixth-stage heat exchanger, the fifth-stage heat exchanger, the fourth-stage heat exchanger, the third-stage heat exchanger, the second-stage heat exchanger and the first-stage heat exchanger, a liquid-phase outlet of the liquid helium storage tank is connected with the second pipeline between the sixth-stage heat exchanger and the fifth-stage heat exchanger through a third pipeline, the third pipeline passes through a six-stage heat exchanger, the helium refrigerating and liquefying system further comprises a first-stage expander and a second-stage expander, an air inlet pipe of the first-stage expander is connected to the first pipeline, an air outlet pipe of the first-stage expander is connected with an air inlet of the second-stage expander, and an air outlet pipe of the second-stage expander is connected to a third pipeline between the liquid helium storage tank and the six-stage heat exchanger.
2. The system of claim 1, wherein the inlet conduit of the primary expander is connected to the first conduit between the secondary and tertiary heat exchangers.
3. The system of claim 2 wherein the outlet of the primary expander passes through a four stage heat exchanger.
4. The system of claim 3, further comprising a first cryogenic pump system mounted on a third line between the liquid helium tank and the six-stage heat exchanger.
5. The system of claim 4, further comprising a pre-cooling line that passes through the primary heat exchanger such that liquid nitrogen in the pre-cooling line pre-cools the primary heat exchanger.
6. The system of claim 5, further comprising a fourth line, one end of the fourth line being connected to the outlet duct of the two-stage expander, the other end of the fourth line being connected to the second line between the six-stage heat exchanger and the five-stage heat exchanger.
7. A helium refrigerating and liquefying system is characterized by comprising a helium compressor and a throttle valve, wherein an outlet of the helium compressor is communicated with an inlet of the throttle valve through a first pipeline, an outlet of the throttle valve is communicated with a liquid helium storage tank through a pipeline, a gas-phase outlet of the liquid helium storage tank is communicated with the inlet of the helium compressor through a second pipeline so that helium throttled and cooled by the throttle valve flows back to the helium compressor, the first pipeline passes through a first-stage heat exchanger, a second-stage heat exchanger, a third-stage heat exchanger, a fourth-stage heat exchanger and a fifth-stage heat exchanger, the second pipeline passes through a fifth-stage heat exchanger, a fourth-stage heat exchanger, a third-stage heat exchanger, a second-stage heat exchanger and a first-stage heat exchanger, a liquid-phase outlet of the liquid helium storage tank is connected with the second pipeline between the fifth-stage heat exchanger and the fourth-stage heat exchanger through a third pipeline, the helium refrigeration and liquefaction system further comprises a first-stage expander and a second-stage expander, wherein an air inlet pipe of the first-stage expander is connected to the first pipeline, an air outlet pipe of the first-stage expander is connected to an air inlet of the second-stage expander, an air outlet pipe of the second-stage expander is connected to a third pipeline between the liquid helium storage tank and the fifth-stage heat exchanger, an air inlet pipe of the first-stage expander is connected to the first pipeline between the first-stage heat exchanger and the second-stage heat exchanger, the helium refrigeration and liquefaction system further comprises a first low-temperature pump system, and the first low-temperature pump system is installed on the third pipeline between the liquid helium storage tank and the fifth-stage heat exchanger.
8. The system of claim 7, further comprising a second cryopump system mounted on an outlet of the primary expander.
9. The system of claim 8 wherein the outlet of the primary expander passes through a three stage heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023003944.4U CN213841515U (en) | 2020-12-14 | 2020-12-14 | Helium refrigeration and liquefaction system |
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| CN202023003944.4U CN213841515U (en) | 2020-12-14 | 2020-12-14 | Helium refrigeration and liquefaction system |
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