CN110398132B - Helium liquefying and different temperature grade helium cold source supply device - Google Patents
Helium liquefying and different temperature grade helium cold source supply device Download PDFInfo
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- CN110398132B CN110398132B CN201910632824.3A CN201910632824A CN110398132B CN 110398132 B CN110398132 B CN 110398132B CN 201910632824 A CN201910632824 A CN 201910632824A CN 110398132 B CN110398132 B CN 110398132B
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- 239000001307 helium Substances 0.000 title claims abstract description 242
- 229910052734 helium Inorganic materials 0.000 title claims abstract description 242
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 title claims abstract description 242
- 239000007788 liquid Substances 0.000 claims abstract description 56
- 230000001502 supplementing effect Effects 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 41
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 239000012535 impurity Substances 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- KIAPWMKFHIKQOZ-UHFFFAOYSA-N 2-[[(4-fluorophenyl)-oxomethyl]amino]benzoic acid methyl ester Chemical compound COC(=O)C1=CC=CC=C1NC(=O)C1=CC=C(F)C=C1 KIAPWMKFHIKQOZ-UHFFFAOYSA-N 0.000 claims description 3
- 102100029075 Exonuclease 1 Human genes 0.000 claims description 3
- 101000918264 Homo sapiens Exonuclease 1 Proteins 0.000 claims description 3
- 239000006096 absorbing agent Substances 0.000 claims description 2
- 238000005057 refrigeration Methods 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- 230000010354 integration Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 238000007872 degassing Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000010792 warming 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
- F25J1/02—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
- F25J1/0201—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 only internal refrigeration means, i.e. without external refrigeration
- F25J1/0202—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 only internal refrigeration means, i.e. without external refrigeration in a quasi-closed internal 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
- F25J1/0243—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.
- F25J1/0294—Multiple compressor casings/strings in parallel, e.g. split arrangement
-
- 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
- F25J2215/00—Processes characterised by the type or other details of the product stream
- F25J2215/30—Helium
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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 helium liquefying and different temperature grade helium cold source supply device comprises an integrated heat exchanger, a helium compressor, a high/low temperature helium expander, a J-T throttle valve, a vacuum Dewar tank, a gas-liquid separation tank and a flow path stop valve, and is characterized in that an inlet of the helium compressor is respectively connected with an inlet of a helium buffer tank, an inlet of the stop valve, an outlet of a rewarming helium stop valve and an outlet of a helium supplementing stop valve, an inlet of the helium supplementing stop valve is connected with a helium source, and an outlet of the helium compressor is respectively connected with an outlet of the helium buffer tank, an outlet of the helium buffer tank and an inlet of a water cooler through a compressed helium check valve.
Description
Technical Field
The invention relates to a helium liquefying and helium cold source supplying device with different temperature grades, belonging to the field of helium liquefying and manufacturing.
Background
Along with the continuous construction and development of the advanced scientific research device in China, the development and maturation of the low-temperature technology are driven and accelerated. The helium liquefying device can provide an extremely low temperature environment for advanced scientific research equipment, and simultaneously can provide required cold energy for the simulation of a high vacuum environment. In recent years, a refrigeration system using liquid helium as a working medium is increasingly used in the low-temperature field. However, only few scientific research institutions in China currently use small helium liquefaction equipment, the output cold quantity is small (generally tens to hundreds of watts), the refrigeration efficiency is low, and the helium refrigerant output with multiple temperature sequences cannot be realized. According to the device, helium liquid nitrogen precooling, secondary expansion refrigeration of the helium expander and J-T throttling are adopted to realize helium liquefaction and helium cold source output of different temperature sequences, so that the requirements of different cryogenic equipment on helium cold sources can be met.
Disclosure of Invention
The invention relates to a helium liquefaction and different temperature grade helium cold source supply technology and device, which is characterized in that liquid helium, supercritical helium and different temperature grade helium cold sources are obtained through compressed helium liquid nitrogen precooling, high-low temperature expander double-stage expansion refrigeration and J-T throttling refrigeration. The invention utilizes one integrated heat exchange device to obtain normal pressure liquid helium, supercritical helium and helium cold sources with different temperature sequences so as to meet the requirements of different cryogenic devices on the helium cold sources, and the purpose of the invention is solved by the following technical scheme: the helium liquefying and different temperature grade helium cold source supply device comprises an integrated heat exchanger, a helium compressor, a high/low temperature helium expander, a J-T throttle valve, a vacuum Dewar tank, a gas-liquid separation tank and a flow path stop valve, and is characterized in that an inlet of the helium compressor is respectively connected with an inlet of a helium buffer tank, an inlet of a stop valve, an outlet of a rewarming helium stop valve and an outlet of a helium supplementing stop valve. The helium supplementing stop valve inlet is connected with a helium source, the helium compressor outlet is respectively connected with the helium buffer tank outlet stop valve outlet and the water cooler inlet through the compressed helium check valve, the water cooler outlet is connected with the integrated heat exchanger hot end inlet HXI1 through the compressed helium stop valve, and the integrated heat exchanger hot end outlet HXO1 is respectively connected with the high-temperature impurity adsorber inlet stop valve inlet and the bypass stop valve inlet. The outlet of the stop valve is connected with the outlet of the high-temperature impurity adsorber and the inlet of the stop valve, and the outlet of the stop valve is respectively connected with the outlet of the bypass stop valve, the hot end inlet HXI2 of the integrated heat exchanger and the inlet of the stop valve. The hot end outlet HXO2 of the integrated heat exchanger is respectively connected with the hot end inlet HXI3 of the integrated heat exchanger, the inlet of the stop valve of the inlet of the high-temperature expansion machine and the inlet of the stop valve. The outlet of the stop valve is connected with the inlet of the high-temperature expansion machine, and the outlet of the high-temperature expansion machine is connected with the hot end inlet EXI1 of the integrated heat exchanger. The outlet EXO1 of the hot end of the integrated heat exchanger is connected with the inlet of the stop valve of the inlet of the low-temperature expansion machine, and the outlet of the stop valve is connected with the inlet of the low-temperature expansion machine. The outlet of the low-temperature expansion machine is respectively connected with the outlet of the stop valve and the inlet CXI5 of the cold end of the integrated heat exchanger.
As preferable: the hot end outlet HXO3 of the integrated heat exchanger is respectively connected with the hot end inlet HXI and the stop valve inlet of the integrated heat exchanger, the hot end outlet HXO4 of the integrated heat exchanger is connected with the low-temperature impurity adsorber inlet, and the low-temperature impurity adsorber outlet is respectively connected with the hot end inlet HXI and the stop valve inlet of the integrated heat exchanger. The hot end outlet HXO5 of the integrated heat exchanger is connected with the inlet of the low-temperature throttle valve, and the outlet of the low-temperature throttle valve is connected with the hot end inlet HXI of the integrated heat exchanger.
As preferable: and a hot end outlet HXO6 of the integrated heat exchanger is respectively connected with a throttle valve inlet, a supercritical helium throttle valve inlet and a stop valve inlet. The outlet of the throttle valve is connected with a vacuum Du Wajin port, the outlet of the supercritical helium throttle valve is connected with the inlet of the gas-liquid separator, and the outlet of the cold helium stop valve is connected with the inlet of a heat exchange tube at the bottom of the gas-liquid separator. The vacuum Du Wading part gas outlet is respectively connected with the gas outlet at the top of the gas-liquid separator and the CXI6 at the cold end of the integrated heat exchanger. The gas-liquid separator supercritical helium outlet is connected to various cryogenic environment demand supercritical helium inlets through supercritical helium shut-off valve 25. The outlet of the stop valve, the outlet of the stop valve and the outlet of the stop valve are commonly connected with inlets of various cryogenic environment demands, the outlets of the various cryogenic environment demands and the inlets of the stop valve are connected with inlets of the stop valve of the helium degassing and liquid separator, the outlet of the stop valve is connected with a gas inlet of the gas-liquid separator, and a liquid outlet at the bottom of the vacuum Dewar is connected with inlets of various cryogenic environment demands through a liquid helium stop valve. The outlet of the heat exchange tube at the bottom of the gas-liquid separator is connected with the liquid outlet at the bottom of the gas-liquid separator through various inlets required by the cryogenic environment. The outlet of the stop valve is respectively connected with the outlet of various cryogenic environment demand gases and the inlet of the stop valve), the inlet of the stop valve and the inlet of the stop valve.
As preferable: and a cold end outlet CXO5 of the integrated heat exchanger is respectively connected with a stop valve outlet and a cold end inlet CXI4 of the integrated heat exchanger. And the cold end outlet CXO4 of the integrated heat exchanger is respectively connected with the outlet of the stop valve and the cold end inlet CXI3 of the integrated heat exchanger. And the cold end outlet CXO3 of the integrated heat exchanger is respectively connected with the outlet of the stop valve and the cold end inlet CXI2 of the integrated heat exchanger. And the CXO2 at the cold end outlet of the integrated heat exchanger is connected with the inlet of the rewarming helium stop valve. And the cold end inlet CXI1 of the integrated heat exchanger is connected with a liquid nitrogen storage tank, and the outlet is connected with a nitrogen pipe network.
The invention is an improvement on the prior art, and has the characteristics of reasonable structure, convenient use and control, simple structure, low use cost, high working efficiency and the like.
The invention adopts a high/low temperature helium expander for two-stage expansion refrigeration. After the primary expansion of the high-temperature expander, helium is used as a heat source to be continuously cooled, and then enters the low-temperature expander for expansion and refrigeration, and is used as a main source of the system cold energy of the device.
The invention can prepare liquid helium, supercritical helium and helium cold sources with different temperature sequences, can meet the requirements of various cryogenic environments on the helium cold sources, integrates the heat exchange process into one integrated heat exchanger, reduces the number of heat exchangers and improves the system integration level. The device has compact structure and effectively reduces the occupied area.
The invention relates to a helium liquefaction and different temperature grade helium cold source supply technology and device, which is characterized in that liquid helium, supercritical helium and different temperature grade helium cold sources are obtained through compressed helium liquid nitrogen precooling, high-low temperature expander double-stage expansion refrigeration and J-T throttling refrigeration. The invention utilizes one integrated heat exchange device to obtain normal pressure liquid helium, supercritical helium and helium cold sources with different temperature sequences so as to meet the requirements of different cryogenic devices on the helium cold sources. The invention concentrates the heat exchange process in one integrated heat exchanger, reduces the number of the heat exchangers and improves the system integration level. The device has compact structure and effectively reduces the occupied area.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The invention will be described in detail below with reference to the attached drawings: as shown in FIG. 1, according to the helium liquefaction and different temperature grade helium cold source supply technology and device of the invention, helium is compressed by a helium compressor 1 to realize helium liquefaction circulation by helium 40. The system raw material helium supplement is controlled by a raw material helium supplement stop valve 78, the stop valve 78 is opened, the raw material helium 39 and the rewarmed helium 38 are converged and then used as the inlet helium 40 of the helium compressor, before the system is started, all valves are closed,
the rewarming helium gas stop valve 7 is opened, and the rewarming helium gas 38 enters the helium gas compressor 1. The outlet of the helium compressor 1 is provided with a check valve 4 to prevent the backflow of high pressure helium gas 41. The high-pressure helium gas 41 enters the water cooler 6 to be cooled to the normal temperature. The compressed helium stop valve 8 is opened, and the normal-temperature high-pressure helium 42 at the outlet of the water cooler 6 enters the hot-end inlet HXI1 of the integrated heat exchanger 9.
Further, it is specifically pointed out that helium buffer tank 3 supplements the system raw material helium: (1) opening a helium buffer tank outlet stop valve (5), wherein the helium buffer tank can store high-pressure helium gas and directly serve as raw material helium gas to enter a hot end inlet HXI1 of the integrated heat exchanger 9; (2) opening a helium buffer tank inlet stop valve 2, and storing low-pressure helium as a source of helium compressor feed gas when necessary); (3) when the system is stopped, the helium buffer tank inlet stop valve 2 is opened and can be used as a circulating helium gas storage container.
The hot side outlet HXO1 helium 43 of the integrated heat exchanger 9 can be split into two paths: (1) opening the inlet stop valve 10 and the outlet stop valve 13 of the high-temperature impurity adsorber, and allowing the helium 45 purified by the high-temperature impurity adsorber 11 to enter the hot end inlet HXI2 of the integrated heat exchanger 9; (2) the bypass shutoff valve 12 is opened and helium gas 43 is directly fed into the hot side inlet HXI of the integrated heat exchanger 9 and into the shutoff valve 34.
The hot side outlet HXO2 helium 46 of the integrated heat exchanger 9 is split into two paths: (1) one path of helium 47 enters a hot end inlet HXI of the integrated heat exchanger 9 and an inlet of the stop valve 35 respectively; (2) the high temperature expander inlet stop valve 15 is opened, and the other helium gas 48 enters the inlet of the high temperature expander 14. The helium 49 enters the hot end inlet EXI1 of the integrated heat exchanger 9 after being expanded by the high-temperature expander.
The hot end outlet HXO3 helium 50 of the integrated heat exchanger 9 enters the hot end inlet HXI of the integrated heat exchanger 9 and the inlet of the stop valve 36 respectively. Opening a low-temperature expansion machine inlet stop valve 18, enabling the EXO1 helium 51 at the hot end outlet of the integrated heat exchanger 9 to enter the inlet of the low-temperature expansion machine 19, enabling the expanded helium 76 of the low-temperature expansion machine 19 to be converged with the helium 65 at the cold end temperature sequence I and the CXO6 helium 64 at the cold end outlet of the integrated heat exchanger to be the CXI5 helium 69 at the cold end inlet of the integrated heat exchanger, and enabling the helium to enter the CXI5 at the cold end inlet of the integrated heat exchanger.
The hot side outlet HXO4 helium gas 52 of the integrated heat exchanger 9 enters the low-temperature impurity absorber 16, and the purified helium gas 79 enters the hot side inlet HXI5 of the integrated heat exchanger 9 and the inlet of the stop valve 37. The helium gas 53 at the hot end outlet HXO5 of the integrated heat exchanger 9 is throttled by the low-temperature throttle valve 17, and the throttled helium gas 54 enters the hot end inlet HXI of the integrated heat exchanger 9.
The HXO6 helium gas 55 at the hot end outlet of the integrated heat exchanger 9 is provided with a three-flow path, so that liquid helium and supercritical helium can be respectively obtained: (1) the throttle valve 20 is opened, and liquefied gas-liquid helium 56 enters the vacuum Dewar 21 to collect liquid helium. Opening a liquid helium stop valve 27 at the bottom of the vacuum Dewar 21, enabling liquid helium to enter various cryogenic environment requirements 77, converging helium gas 62 at the top of the vacuum Dewar 21 with gas-liquid separation tank helium gas 61 into helium gas 63, and introducing the helium gas into a cold end inlet CXI6 of the integrated heat exchanger; (2) the supercritical helium throttle valve 22 is opened and the critical pressure helium 58 enters the gas-liquid separator 24. The helium 61 at the top of the gas-liquid separator 24 and the helium 62 at the top of the vacuum Dewar 21 are converged into helium 63, and the helium 63 is sent to a cold end inlet CXI6 of the integrated heat exchanger; opening a supercritical helium stop valve 25 at the bottom of the gas-liquid separator 24, and allowing supercritical helium I80 to enter various cryogenic environment requirements 77; (3) the cold helium stop valve 23 is opened, the cryogenic helium 59 exchanges heat with supercritical helium I at the bottom of the gas-liquid separator 24, and after cooling, high-pressure supercritical helium II 81 enters various cryogenic environment requirements 77.
Vacuum Du Waye helium 82 and supercritical helium 80, 81 enter various cryogenic environment requirements 77 as cold sources, and the evaporated helium is divided into two paths: (1) opening the helium degassing gas-liquid separator stop valve 26, and evaporating cold helium gas 60 into the gas-liquid separator 24; (2) the shut-off valve 28 is opened and the evaporated cold helium gas 83 merges with the evaporated helium gas 84.
And opening a stop valve 31, converging the CXO5 helium 70 at the cold end outlet of the integrated heat exchanger 9 and the helium 66 at the cold end temperature sequence II into helium 71, and entering the CXI4 at the cold end inlet of the integrated heat exchanger 9. And opening a stop valve 32, converging the CXO4 helium 72 at the cold end outlet of the integrated heat exchanger 9 and the III helium 67 at the cold end temperature sequence into helium 73, and entering the CXI3 at the cold end inlet of the integrated heat exchanger 9. The stop valve 33 is opened, the CXO3 helium 74 at the cold end outlet of the integrated heat exchanger 9 and the IVhelium 68 at the cold end temperature sequence are converged into helium (75), and the helium enters the CXI2 at the cold end inlet of the integrated heat exchanger 9. The stop valve 34 is opened, and the CXO2 helium gas 38 at the cold end outlet of the integrated heat exchanger 9 enters the inlet of the helium compressor 1 through the rewarming helium stop valve 7.
Helium gas 84 after the re-warming of various cryogenic environment requirements 77 is respectively converged with cold end outlet helium gas 64, 70, 72 and 74 of the integrated heat exchanger according to different cold end temperature sequences (sequence I65, sequence II 66, sequence III 67 and sequence IV 68).
Helium in different hot end temperature sequences (sequence I86, sequence II 87, sequence III 88 and sequence IV (89)) at the hot end outlet of the integrated heat exchanger 9 is converged to 90 by helium into various cryogenic environment demand stop valves 34, 35, 36 and 37 respectively, and then enters various cryogenic environment demands 77. The shut-off valve 34 is opened and the hot side temperature sequence I helium gas 86 is passed through a converging line 90 into various cryogenic environment demands 77. The shut-off valve 35 is opened and the hot side temperature sequence ii helium gas 87 is passed through the converging line 90 into the various cryogenic environment demands 77. The shut-off valve 36 is opened and the hot side temperature sequence iii helium gas 88 is passed through a converging line 90 into various cryogenic environment demands 77.
The shut-off valve 37 is opened and the hot side temperature sequence iv helium gas 89 is passed through the converging line 90 into the various cryogenic environment demands 77.
It should be pointed out that helium gas with different hot end temperature sequences (sequence I86, sequence II 87, sequence III 88 and sequence IV 89) can be independently taken out from hot end outlets (after the outlet HXO1 high-temperature impurity adsorber, the outlet HXO2, the outlet HXO3 and the outlet HXO 4) of the integrated heat exchanger as required to be used as cold sources for various requirements 77 of the cryogenic environment; combinations of different hot side temperature sequences (sequence I86, sequence II 87, sequence III 88, sequence IV 89) of helium may also be used to obtain helium cold sources of different temperatures.
Specifically, helium gas 65, 66, 67 and 68 with different temperature sequences at the outlet of various cryogenic environment requirements 77 can be selected to be converged with helium gas 64, 70, 72 or 74 at the cold end outlet of one integrated heat exchanger 9 according to the temperature characteristics of the helium gas; or may be concurrent with 64, 70, 72 and 74.
The invention relates to a helium liquefaction and different temperature grade helium cold source supply technology and device, which is characterized in that liquid helium, supercritical helium and different temperature grade helium cold sources are obtained through compressed helium liquid nitrogen precooling, high-low temperature expander double-stage expansion refrigeration and J-T throttling refrigeration. The invention utilizes one integrated heat exchange device to obtain normal pressure liquid helium, supercritical helium and helium cold sources with different temperature sequences so as to meet the requirements of different cryogenic devices on the helium cold sources. The invention concentrates the heat exchange process in one integrated heat exchanger, reduces the number of the heat exchangers and improves the system integration level. The device has compact structure and effectively reduces the occupied area.
The invention relates to a helium liquefaction and different temperature grade helium cold source supply technology and device, which is characterized in that liquid helium, supercritical helium and different temperature grade helium cold sources are obtained through compressed helium liquid nitrogen precooling, high-low temperature expander double-stage expansion refrigeration and J-T throttling refrigeration. The invention utilizes one integrated heat exchange device to obtain normal pressure liquid helium, supercritical helium and helium cold sources with different temperature sequences so as to meet the requirements of different cryogenic devices on the helium cold sources.
The invention adopts a high/low temperature helium expander for two-stage expansion refrigeration. After the primary expansion of the high-temperature expander, helium is used as a heat source to be continuously cooled, and then enters the low-temperature expander for expansion and refrigeration, and is used as a main source of the system cold energy of the device.
The invention can prepare liquid helium, supercritical helium and helium cold sources with different temperature sequences, and can meet the requirements of various cryogenic environments on the helium cold sources.
The invention concentrates the heat exchange process in one integrated heat exchanger, reduces the number of the heat exchangers and improves the system integration level. The device has compact structure and effectively reduces the occupied area.
Claims (4)
1. A helium liquefying and different temperature grade helium cold source supplying device comprises an integrated heat exchanger, a helium compressor, a high-temperature helium expander, a low-temperature helium expander, a J-T throttle valve, a vacuum Dewar tank, a gas-liquid separation tank and a flow path stop valve, and is characterized in that an inlet of the helium compressor (1) is respectively connected with an inlet of a helium buffer tank (3), an inlet of a stop valve (2), an outlet of a rewarming helium stop valve (7) and an outlet of a helium supplementing stop valve (78), an inlet of the helium supplementing stop valve (78) is connected with a helium source, an outlet of the helium compressor (1) is respectively connected with an outlet of a stop valve (5) of the helium buffer tank (3) through a compressed helium check valve (4), an inlet of a water cooler (6) is connected with an inlet HXI1 of a hot end of an integrated heat exchanger (9) through a compressed helium stop valve (8), an outlet O1 of the integrated heat exchanger (9) is respectively connected with an inlet of a stop valve (10) of a high-temperature impurity adsorber (11), an inlet of a bypass stop valve (12), an outlet of the helium supplementing stop valve (78) is connected with a helium source, an outlet of the helium compressor (1) is connected with an outlet of the heat exchanger (9) through a hot end of the heat exchanger (9), and an outlet of the water cooler (12) is connected with an inlet of the high-temperature impurity adsorber (13) of the integrated heat absorber (13) through a heat exchanger (13) by the heat exchanger (13) The heat exchange device comprises a stop valve (34) inlet, a hot end outlet HXO2 of the integrated heat exchanger (9) is respectively connected with a hot end inlet HXI of the integrated heat exchanger (9), a high temperature expander (14) inlet stop valve (15) inlet and a stop valve (35) inlet, a stop valve (15) outlet is connected with a high temperature expander (14) inlet, a high temperature expander (14) outlet is connected with a hot end inlet EXI1 of the integrated heat exchanger (9), a hot end outlet EXO1 of the integrated heat exchanger (9) is connected with an inlet of a stop valve (18) of a low temperature expander (19) inlet, a stop valve (18) outlet is connected with a low temperature expander (19) inlet, and a low temperature expander (19) outlet is respectively connected with a stop valve (30) outlet and a cold end inlet CXI5 of the integrated heat exchanger (9).
2. The helium liquefaction and different temperature grade helium cold source supply device according to claim 1, wherein a hot end outlet HXO3 of the integrated heat exchanger (9) is respectively connected with a hot end inlet HXI and a stop valve (36) of the integrated heat exchanger (9), the hot end outlet HXO4 of the integrated heat exchanger (9) is connected with a low temperature impurity adsorber (16) inlet, an outlet of the low temperature impurity adsorber (16) is respectively connected with a hot end inlet HXI and a stop valve (37) of the integrated heat exchanger (9), the hot end outlet HXO5 of the integrated heat exchanger (9) is connected with a low temperature throttle valve (17) inlet, and an outlet of the low temperature throttle valve (17) is connected with a hot end inlet HXI6 of the integrated heat exchanger (9).
3. The helium liquefaction and different temperature grade helium cold source supply device according to claim 2 is characterized in that a hot end outlet HXO6 of the integrated heat exchanger (9) is respectively connected with an inlet of a throttle valve (20), an inlet of a supercritical helium throttle valve (22) and an inlet of a stop valve (23), an outlet of the throttle valve (20) is connected with an inlet of a vacuum Dewar (21), an outlet of the supercritical helium throttle valve (22) is connected with an inlet of a gas-liquid separator (24), an outlet of the cold helium stop valve (23) is connected with an inlet of a heat exchange tube at the bottom of the gas-liquid separator (24), an outlet of gas at the top of the vacuum Dewar (21) is respectively connected with an outlet of gas at the top of the gas-liquid separator (24) and an inlet CXI6 at the cold end of the integrated heat exchanger (9), an outlet of supercritical helium of the gas-liquid separator (24) is connected with various cryogenic environment requirements (77) through a supercritical helium stop valve (25), an outlet of a stop valve (34), an outlet of the stop valve (35), an outlet of the stop valve (36) and an outlet of the stop valve (37) are jointly connected with various cryogenic environment requirements (77), an inlet of the various cryogenic environment requirements (77), an outlet of the cryogenic environment (26) is respectively connected with an inlet of the gas-liquid separator (26), the bottom liquid outlet of the vacuum Dewar (21) is connected with liquid helium inlets of various cryogenic environment demands (77) through a liquid helium stop valve (27), the bottom heat exchange tube outlet of the gas-liquid separator (24) and the bottom liquid outlet of the gas-liquid separator (24) are connected with the inlets of the various cryogenic environment demands (77), and the outlet of the stop valve (28) is respectively connected with the gas outlet of the various cryogenic environment demands (77), the inlet of the stop valve (30), the inlet of the stop valve (31), the inlet of the stop valve (32) and the inlet of the stop valve (33).
4. The helium liquefaction and different temperature grade helium cold source supply device according to claim 3 is characterized in that a cold end outlet CXO5 of the integrated heat exchanger (9) is respectively connected with an outlet of a stop valve (31) and a cold end inlet CXI4 of the integrated heat exchanger (9), the cold end outlet CXO4 of the integrated heat exchanger (9) is respectively connected with an outlet of a stop valve (32) and a cold end inlet CXI3 of the integrated heat exchanger (9), the cold end outlet CXO3 of the integrated heat exchanger (9) is respectively connected with an outlet of a stop valve (33) and a cold end inlet CXI2 of the integrated heat exchanger (9), the cold end outlet CXO2 of the integrated heat exchanger (9) is connected with an inlet of a rewarming helium stop valve (7), the cold end inlet CXI1 of the integrated heat exchanger (9) is connected with a liquid nitrogen storage tank, and an outlet of the liquid nitrogen storage tank is connected with a nitrogen pipe network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910632824.3A CN110398132B (en) | 2019-07-14 | 2019-07-14 | Helium liquefying and different temperature grade helium cold source supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910632824.3A CN110398132B (en) | 2019-07-14 | 2019-07-14 | Helium liquefying and different temperature grade helium cold source supply device |
Publications (2)
| Publication Number | Publication Date |
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| CN110398132A CN110398132A (en) | 2019-11-01 |
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| CN112129040B (en) * | 2020-09-27 | 2024-02-20 | 杭氧集团股份有限公司 | Liquid xenon cooling and reliquefaction skid-mounted device and method thereof |
| CN113983759A (en) * | 2021-10-29 | 2022-01-28 | 四川空分设备(集团)有限责任公司 | Integrated internal purification helium liquefying device |
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