CN110404405B - Device for efficiently separating Ne-22 isotope - Google Patents
Device for efficiently separating Ne-22 isotope Download PDFInfo
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- CN110404405B CN110404405B CN201910820576.5A CN201910820576A CN110404405B CN 110404405 B CN110404405 B CN 110404405B CN 201910820576 A CN201910820576 A CN 201910820576A CN 110404405 B CN110404405 B CN 110404405B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D59/00—Separation of different isotopes of the same chemical element
- B01D59/02—Separation by phase transition
- B01D59/04—Separation by phase transition by distillation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D59/00—Separation of different isotopes of the same chemical element
- B01D59/10—Separation by diffusion
- B01D59/16—Separation by diffusion by thermal diffusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D59/00—Separation of different isotopes of the same chemical element
- B01D59/50—Separation involving two or more processes covered by different groups selected from groups B01D59/02, B01D59/10, B01D59/20, B01D59/22, B01D59/28, B01D59/34, B01D59/36, B01D59/38, B01D59/44
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- Separation By Low-Temperature Treatments (AREA)
Abstract
The invention discloses a device for efficiently separating Ne-22 isotopes, which comprises a Ne-22 crude gas production system by a thermal diffusion method, a Ne-22 isotope low-temperature rectification enrichment system, a Ne-22 isotope product heavy component removal system and a Ne-22 crude gas production waste heat utilization system by the thermal diffusion method.
Description
Technical Field
The invention relates to a device for separating Ne-22 isotopes, in particular to a device for efficiently separating Ne-22 isotopes, belonging to the field of chemical industry.
Background
The natural abundance of the Ne-22 isotope is 9.25%, which is a sufficient material for manufacturing high-tech equipment such as a neon-helium stabilized frequency laser, a high-precision laser gyroscope, and the like, meanwhile, the Ne-22 isotope has important application in the fields of medical detection in early cancer stage, medical radiotherapy, high-energy nuclear physics, and the like, and the development of the high-efficiency Ne-22 isotope separation technology has important significance on the strategic level. At present, the large-scale stable production of Ne-22 cannot be realized in China, so that development of a high-efficiency Ne-22 isotope separation system with independent intellectual property rights is urgently needed, the Ne-22 isotope and Ne-20 isotope can be efficiently separated, the equipment is compact in size and high in operation reliability, and the large-scale stable production of the Ne isotope can be realized.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the device for efficiently separating the Ne-22 isotope, which has the technical characteristics of high separation process efficiency, compact equipment volume, high operation reliability and the like on the premise of ensuring the output scale of the Ne-22 isotope.
The invention combines isotope low-temperature rectification and thermal diffusion method, fully utilizes the characteristics that the thermal diffusion method has higher separation coefficient, and the low-temperature rectification can treat a large amount of raw materials, and combines the two, in particular: the Ne-22 isotope is quickly and efficiently separated from the high-purity neon by adopting a method combining a thermal diffusion principle and low-temperature rectification, ne-22 crude gas is produced as raw material gas for concentrating Ne-22 by low-temperature rectification by utilizing the characteristic that the thermal diffusion separation isotope has a higher separation coefficient, the low-temperature rectification separation has larger gas treatment capacity, the yield of the Ne-22 isotope of the whole set of device can be improved, the method is suitable for industrial-scale Ne-22 isotope production, the heat carried by the Ne gas in the Ne-22 crude gas enrichment process by the thermal diffusion method can be used as a heat source of an evaporator at the bottom of a low-temperature rectification subsystem, the waste heat generated in the thermal diffusion separation process is fully utilized, and the energy consumption of the whole set of device is reduced.
In order to achieve the above purpose, the present invention is realized by the following technical scheme:
the device for efficiently separating the Ne-22 isotope comprises a Ne-22 crude gas production system by a thermal diffusion method, a Ne-22 isotope low-temperature rectification enrichment system and a Ne-22 isotope product heavy component removal system;
the Ne-22 crude gas production system by the thermal diffusion method comprises a circulating cooling water pipeline, and a I-level thermal diffusion separation column, a II-level thermal diffusion separation column and a III-level thermal diffusion separation column which are connected in series, wherein neon outlets with stop valves are respectively arranged on the I-level thermal diffusion separation column and the II-level thermal diffusion separation column, the three-level thermal diffusion separation columns are connected with the circulating cooling water pipeline, the inlet of the I-level thermal diffusion separation column is connected with raw neon, and the discharge outlet of the III-level thermal diffusion separation column is connected with a Ne-22 gas filter;
the Ne-22 isotope low-temperature rectification enrichment system comprises a grade I low-temperature rectification tower, a grade II low-temperature rectification tower and a grade III low-temperature rectification tower which are connected in series, wherein a first waste gas port is arranged at the top of the grade I low-temperature rectification tower and the top of the grade II low-temperature rectification tower, the first waste gas port is connected with a regulating valve, a regulating valve on the grade II low-temperature rectification tower is connected with the grade I low-temperature rectification tower, a second waste gas port is arranged at the top of the grade III low-temperature rectification tower, the second waste gas port is connected with a stop valve, the stop valve on the grade III low-temperature rectification tower is connected with the grade II low-temperature rectification tower, and the Ne-22 gas filter is connected with a feed inlet of the grade I low-temperature rectification tower;
the Ne-22 isotope product heavy component removing system comprises a Ne-22 isotope product heavy component removing tower, wherein the top of the Ne-22 isotope product heavy component removing tower is sequentially connected with a Ne-22 gas inlet heavy component removing tower stop valve and a neon rewarming winding pipe at the top of the heavy component removing tower, the bottom of the Ne-22 isotope product heavy component removing tower is connected with a heavy component removing tower waste liquid discharge stop valve for removing heavy component impurities, and a Ne-22 isotope product heavy component removing tower feed inlet is connected with a discharge port at the bottom of the III-level low-temperature rectifying tower 12;
the waste heat utilization system for producing the crude gas by the thermal diffusion method Ne-22 comprises three reboilers, wherein the reboilers are respectively connected to the bottoms of an I-stage low-temperature rectifying tower, an II-stage low-temperature rectifying tower and an III-stage low-temperature rectifying tower, exhaust pipes with stop valves are connected to the upper ends of the I-stage thermal diffusion separation column, the II-stage thermal diffusion separation column and the III-stage thermal diffusion separation column, the exhaust pipe on the I-stage thermal diffusion separation column is connected with the reboiler on the I-stage low-temperature rectifying tower, the exhaust pipe on the II-stage thermal diffusion separation column is connected with the reboiler on the II-stage low-temperature rectifying tower, and the exhaust pipe on the III-stage thermal diffusion separation column is connected with the reboiler on the III-stage low-temperature rectifying tower.
As an improvement, the I-level thermal diffusion separation column comprises m parallel sub-thermal diffusion separation columns, the II-level thermal diffusion separation column comprises n parallel sub-thermal diffusion separation columns, the upper end and the lower end of each sub-thermal diffusion separation column are respectively provided with a circulating water outlet and a circulating water inlet, the outer wall surface of each sub-thermal diffusion separation column forms a cold wall surface, the axle center of each sub-thermal diffusion separation column is provided with an electric heating wire, and the electric heating wire forms a hot wall surface.
As an improvement, the device also comprises a helium heat exchanger, the bottom of the III-level thermal diffusion separation column is connected with a raw material gas pipeline of a low-temperature rectification system, the Ne-22 gas filter is connected on the raw material gas pipeline of the low-temperature rectification system, the Ne-22 gas filter is provided with a first pipeline and a second pipeline, the first pipeline is connected with a feeding port of the I-level thermal diffusion separation column, the first pipeline and the second pipeline are both provided with stop valves, the second pipeline is converged with the first pipeline after passing through the helium heat exchanger, a branch is connected with a neon reheating helium winding pipe outlet at the top of the heavy-duty removal column, and the branch is connected with a reheating helium winding pipe after passing through the helium heat exchanger, and the reheating helium winding pipe is connected with a high-purity helium filling bottle.
As an improvement, the I-stage low-temperature rectifying tower comprises a plurality of efficient structured packing towers which are connected in parallel, wherein each efficient structured packing tower comprises a helium gas cold source condenser, and the helium gas cold source condenser is positioned at the top of each efficient structured packing tower.
As an improvement, the circulating cooling water pipeline comprises a circulating water branch and a circulating refrigeration branch flowing with circulating refrigerant, wherein two ends of the circulating water branch are respectively connected to a circulating water outlet and a circulating water inlet of the sub-thermal diffusion separation column, a heat exchanger is connected to the circulating water branch, two ends of the circulating refrigeration branch are both connected to the heat exchanger, and a compressor is connected to the circulating refrigeration branch.
As an improvement, the reboiler at the bottom of the II-stage cryogenic rectification tower extends and is provided with two branches, one branch is connected with the top of the II-stage thermal diffusion separation column, and the other branch is converged with the upper exhaust pipe of the III-stage thermal diffusion separation column.
The beneficial effects are that: the method has the characteristics of higher separation coefficient, rapidly enriches the crude Ne-22 raw material gas, and then utilizes low-temperature rectification to treat a large amount of crude Ne-22 raw material gas so as to improve the Ne-22 isotope yield, uses the heat abandoned by a thermal diffusion method as evaporation heat in the low-temperature rectification process, fully utilizes waste heat generated in the thermal diffusion separation process, effectively improves the energy utilization efficiency of the system, and reduces the energy consumption of the whole device.
Drawings
Fig. 1 is a schematic diagram of the structure of the present invention.
FIG. 2 is a schematic diagram of the circulating cooling water pipeline structure of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the following examples.
1-2 show a specific embodiment of an apparatus for efficiently separating Ne-22 isotopes, which comprises a thermal diffusion Ne-22 crude gas production system 1, a Ne-22 isotope cryogenic rectification enrichment system 2 and a Ne-22 isotope product heavy component removal system 3;
wherein the thermal diffusion Ne-22 crude gas production system 1 comprises a circulating cooling water pipeline, an I-level thermal diffusion separation column 6, a II-level thermal diffusion separation column 7 and a III-level thermal diffusion separation column 8 which are connected in series, neon outlets 9 with stop valves are arranged on the I-level thermal diffusion separation column 6 and the II-level thermal diffusion separation column 7, neon is led out from the neon outlets 9 at the bottom of the I-level thermal diffusion separation column 6, the neon is led in from the top of the II-level thermal diffusion separation column 11 and is used as raw material gas of the II-level thermal diffusion separation column, neon is led out from the neon outlets 9 at the bottom of the II-level thermal diffusion separation column 11, the neon is introduced from the top of a III-level thermal diffusion separation column 12 and is used as a raw material gas of a final-stage thermal diffusion separation column, the three-level thermal diffusion separation column is connected with a circulating cooling water pipeline, the inlet of the I-level thermal diffusion separation column 6 is connected with raw material neon which is raw material high-purity neon, the purity of the raw material neon is greater than 99.9999%, the raw material neon enters from the top of the I-level thermal diffusion separation column 6, the discharge port of the III-level thermal diffusion separation column 8 is connected with a Ne-22 gas filter 5, and coarse Ne-22 gas is filtered by the Ne-22 gas filter 5 to remove solid particles less than or equal to 0.01 mu m, so as to obtain purified coarse Ne-22 gas;
the Ne-22 isotope cryogenic rectification enrichment system 2 comprises a I-stage cryogenic rectification tower 10, a II-stage cryogenic rectification tower 11 and a III-stage cryogenic rectification tower 12 which are connected in series, wherein the top parts of the I-stage cryogenic rectification tower 10 and the II-stage cryogenic rectification tower 11 are provided with a first waste gas port, the first waste gas port is connected with a regulating valve, the regulating valve on the II-stage cryogenic rectification tower 11 is connected with the I-stage cryogenic rectification tower 10, the top part of the III-stage cryogenic rectification tower 12 is provided with a second waste gas port, the second waste gas port is connected with a stop valve, the stop valve on the III-stage cryogenic rectification tower 12 is connected with the II-stage cryogenic rectification tower 11, the bottom of the I-stage cryogenic rectification tower 10 is discharged, neon at the bottom enters the middle lower part of the II-stage cryogenic rectification tower 11 through the stop valve, the waste gas at the top of the I-level low-temperature rectifying tower 10 is exhausted through a regulating valve, the waste gas at the top of the II-level low-temperature rectifying tower 11 returns to the upper part of the I-level low-temperature rectifying tower 10 through the regulating valve and is used as rectifying reflux liquid, the discharged material at the bottom of the II-level low-temperature rectifying tower 11 enters the upper part of the III-level low-temperature rectifying tower 12 through a stop valve, the waste gas at the top of the III-level low-temperature rectifying tower returns to the upper part of the II-level low-temperature rectifying tower 11 through a stop valve and is used as rectifying reflux liquid, the Ne-22 gas filter 5 is connected with a feed inlet of the I-level low-temperature rectifying tower 10, and Ne-22 gas with solid particles (the particle diameter is less than or equal to 0.01 mu m) is filtered through the Ne-22 gas filter 5 to remove the Ne-22 isotope low-temperature rectifying enrichment system 2 raw gas;
the Ne-22 isotope product heavy component removing system 3 comprises a Ne-22 isotope product heavy component removing tower 13, wherein the top of the Ne-22 isotope product heavy component removing tower 13 is sequentially connected with a Ne-22 gas inlet heavy component removing tower stop valve 14 and a heavy component removing tower top neon rewarming winding pipe 15, the bottom of the Ne-22 isotope product heavy component removing tower 13 is connected with a heavy component removing tower waste liquid discharge stop valve 33 for removing heavy component impurities, a Ne-22 isotope product heavy component removing tower 13 feeding port is connected with a III-grade low-temperature rectifying tower 12 bottom discharging port, heavy component impurities are required to be filtered by the Ne-22 isotope product heavy component removing tower 13 from the Ne-22 isotope product heavy component removing tower 12 bottom, the Ne-22 isotope product heavy component removing tower 13 top is sequentially connected with a Ne-22 gas outlet heavy component removing tower stop valve 14 and a heavy component removing tower top neon rewarming winding pipe 15, and high-abundance Ne-22 isotope product is collected at the Ne-22 isotope product heavy component removing tower 13 top, so as to obtain Ne-22 isotope product;
the waste heat utilization system 4 for producing the crude gas by the thermal diffusion method Ne-22 comprises three reboilers 31, wherein the reboilers 31 are respectively connected to the bottoms of the I-stage low-temperature rectifying tower 10, the II-stage low-temperature rectifying tower 11 and the III-stage low-temperature rectifying tower 12, the upper ends of the I-stage thermal diffusion separation column 10, the II-stage thermal diffusion separation column 11 and the III-stage thermal diffusion separation column 12 are respectively connected with an exhaust pipe 32 with a stop valve, the exhaust pipe 32 on the I-stage thermal diffusion separation column 6 is connected with the reboiler 31 on the I-stage low-temperature rectifying tower 10, the exhaust pipe 32 on the II-stage thermal diffusion separation column 7 is connected with the reboiler 31 on the II-stage low-temperature rectifying tower 11, the exhaust pipe 32 on the III-stage thermal diffusion separation column 8 is connected with the reboiler 31 on the III-stage low-temperature rectifying tower 12, the waste neon at the top of the I-stage thermal diffusion separation column 6 is controlled to be on-off by a stop valve and enters a reboiler 31 on the I-stage low-temperature rectification column 10 through an exhaust pipe 32 to serve as a heat source of the evaporation gas of the I-stage low-temperature rectification column 10, waste heat of the I-stage thermal diffusion separation column 6 is utilized, the waste neon after heat exchange can be used as ultra-pure neon for other purposes or directly used as the ultra-pure neon for selling products, the waste neon at the top of the II-stage thermal diffusion separation column 7 is controlled to be on-off by the stop valve and enters the reboiler 31 on the II-stage low-temperature rectification column 11 through the exhaust pipe 32 to serve as a heat source of the evaporation gas of the II-stage low-temperature rectification column 11, the waste neon at the top of the III-stage thermal diffusion separation column 8 is used as a heat source of the bottom of the III-stage low-temperature rectification column 12 through the stop valve and enters the reboiler 31 on the III-stage low-temperature rectification column 12 through the exhaust pipe 32 to serve as a supplement, the neon at the outlet part of the reboiler 31 of the II-stage low-temperature rectifying tower 11 and the waste neon at the top of the III-stage thermal diffusion separation column 8 are converged and then enter the reboiler 31 of the III-stage low-temperature rectifying tower 12, and the waste gas at the tops of the I-stage thermal diffusion separation column 6, the II-stage thermal diffusion separation column 7 and the III-stage thermal diffusion separation column 8 are respectively used as evaporation heat sources at the bottoms of the I-stage low-temperature rectifying tower 10, the II-stage low-temperature rectifying tower 11 and the III-stage low-temperature rectifying tower 12, so that waste heat discharged by a thermal diffusion system is effectively utilized, and the energy consumption of the whole device is reduced.
The invention takes high-purity neon as raw material gas, the purity of which is more than 99.9999 percent, takes high-purity helium as a condensing cold source of a low-temperature rectification system, combines a thermal diffusion method and a low-temperature rectification method of isotope separation, rapidly and efficiently enriches Ne-22 isotopes from the high-purity neon, utilizes the characteristic of large isotope separation coefficient of thermal diffusion enrichment, and mass produces Ne-22 crude gas as low-temperature rectification raw material gas, and utilizes the characteristic of large treatment capacity of low-temperature rectification gas to produce Ne-22 isotopes in large scale.
As an improved embodiment, the I-stage thermal diffusion separation column 6 comprises m parallel sub-thermal diffusion separation columns 16, the ii-stage thermal diffusion separation columns comprise n parallel sub-thermal diffusion separation columns 16, the upper end and the lower end of each sub-thermal diffusion separation column 16 are respectively provided with a circulating water outlet 17 and a circulating water inlet 18, the outer wall surface of each sub-thermal diffusion separation column 16 forms a cold wall surface, the axle center of each sub-thermal diffusion separation column 16 is provided with an electric heating wire, the electric heating wire forms a hot wall surface, each sub-thermal diffusion separation column 16 is filled with circulating cooling water from bottom to top, ne-20 tends to concentrate on the hot wall surface when raw material neon passes through the sub-thermal diffusion separation column 16 from top to bottom, and Ne-22 is thus enriched on the cold wall surface; m and n are positive integers, and m is greater than n.
As an improved embodiment, the device further comprises a neon heat exchanger 19, the bottom of the III-level thermal diffusion separation column 8 is connected with a raw material gas pipeline 20 of the low-temperature rectification system, the Ne-22 gas filter 5 is connected to the raw material gas pipeline 20 of the low-temperature rectification system, the Ne-22 gas filter 5 is provided with a first pipeline 21 and a second pipeline 22, the first pipeline 21 is directly connected with a feed inlet of the I-level thermal diffusion separation column 6, a stop valve is arranged on the first pipeline 21, ne-22 gas in the first pipeline 21 is used as raw material gas to participate in the rectification process, the purified crude Ne-22 gas carries a certain amount of heat, the purified crude Ne-22 gas can be partially used as an evaporation heat source of the I-level low-temperature rectification column 10, the second pipeline 22 is collected with the first pipeline 21 after passing through the helium heat exchanger 19, the Ne-22 gas in the second pipeline 22 exchanges heat with cold helium gas coming out of the low-temperature rectification column 19 after being precooled into the I-level low-temperature rectification column 10, the first pipeline 21 and the second pipeline 22 are specifically selected, the Ne-22 gas pipeline 22 is controlled through the stop valve, the outlet of the top of the de-rectification column 15 is connected with a bypass pipeline 23, and the bypass pipeline 23 is connected with a high-temperature helium gas pipe 24 after passing through the bypass pipeline 24, and the high-temperature rectification column is connected with the high-temperature rectification tube 24.
As an improved embodiment, the level I cryogenic rectification tower 10 includes a plurality of efficient structured packing towers 25 formed in parallel, the efficient structured packing towers 25 include helium gas cold source condensers 26, the helium gas cold source condensers 26 are located at the tops of the efficient structured packing towers 25, and cold source helium gas in the cold source condensers 26 is throttled by high-pressure helium gas through a throttle valve to generate cold energy, so that the cold source serves as the top cold source of the level I cryogenic rectification tower 10, the level ii cryogenic rectification tower 11 and the level iii cryogenic rectification tower 12.
As an improved embodiment, the circulating cooling water pipeline comprises a circulating water branch 27 and a circulating cooling branch 28 with circulating refrigerant flowing, two ends of the circulating water branch 27 are respectively connected to the circulating water outlet 17 and the circulating water inlet 18 of the sub thermal diffusion separation column 16, a heat exchanger 29 is connected to the circulating water branch 27, two ends of the circulating cooling branch 28 are both connected to the heat exchanger 29, a compressor 30 is connected to the circulating cooling branch 28, cooling water flowing out from the circulating water outlet 17 of the sub thermal diffusion separation column 16 exchanges heat with the circulating refrigerant in the circulating cooling branch 28 through the heat exchanger 29, and cooled cooling water enters the circulating water inlet 18 of the sub thermal diffusion separation column 16 respectively and cools high Wen Nai gas on the cold wall surface of the sub thermal diffusion separation column 16.
As an improved embodiment, the reboiler 31 at the bottom of the ii-stage cryogenic rectification column 11 extends and is divided into two branches, one branch is connected to the bottom of the ii-stage thermal diffusion separation column 7, and the other branch is converged with the exhaust pipe 32 on the iii-stage thermal diffusion separation column 12, specifically: the waste neon at the top of the II-stage thermal diffusion separation column 7 enters a reboiler 31 at the bottom of the II-stage low-temperature rectification column 11, the reboiler 31 at the bottom of the II-stage low-temperature rectification column 11 is internally mixed with the waste neon in an exhaust pipe 32 on the III-stage thermal diffusion separation column 8 and then used as a reboiling heat source for the reboiler 31 at the bottom of the III-stage low-temperature rectification column 12, and the reboiling heat source for the reboiler 31 at the bottom of the III-stage low-temperature rectification column 12 is participated in the evaporation process of the liquid neon at the bottom of the III-stage low-temperature rectification column 12, particularly, when the evaporation heat source provided by the waste neon at the top of the III-stage thermal diffusion separation column 8 is insufficient, the waste neon coming out from the reboiler 31 on the II-stage low-temperature rectification column 11 can be partially used as the reboiling heat source for the reboiler 31 at the bottom of the III-stage low-temperature rectification column 12.
Finally, it should be noted that the invention is not limited to the above embodiments, but that many variants are possible. All modifications directly derived or suggested to one skilled in the art from the present disclosure should be considered as being within the scope of the present invention.
Claims (6)
1. An apparatus for efficiently separating Ne-22 isotopes, characterized in that: comprises a thermal diffusion method Ne-22 crude gas production system (1), a Ne-22 isotope low-temperature rectification enrichment system (2) and a Ne-22 isotope product heavy component removal system (3);
the Ne-22 crude gas production system (1) comprises a circulating cooling water pipeline, and I-level heat diffusion separation columns (6), II-level heat diffusion separation columns (7) and III-level heat diffusion separation columns (8) which are connected in series, neon outlets (9) with stop valves are respectively arranged on the I-level heat diffusion separation columns (6) and the II-level heat diffusion separation columns (7), the three-level heat diffusion separation columns are connected with the circulating cooling water pipeline, raw material neon is connected to an inlet of the I-level heat diffusion separation column (6), and a Ne-22 gas filter (5) is connected to a discharge port of the III-level heat diffusion separation column (8);
the Ne-22 isotope low-temperature rectification enrichment system (2) comprises an I-stage low-temperature rectification tower (10), a II-stage low-temperature rectification tower (11) and a III-stage low-temperature rectification tower (12) which are connected in series, a first exhaust gas port is arranged at the top of the I-stage low-temperature rectification tower (10) and the top of the II-stage low-temperature rectification tower (11), the first exhaust gas port is connected with a regulating valve, the regulating valve on the II-stage low-temperature rectification tower (11) is connected with the I-stage low-temperature rectification tower (10), a second exhaust gas port is arranged at the top of the III-stage low-temperature rectification tower (12), a stop valve is connected with the II-stage low-temperature rectification tower (11) on the III-stage low-temperature rectification tower (12), and the Ne-22 gas filter (5) is connected with a feed port of the I-stage low-temperature rectification tower (10);
the Ne-22 isotope product heavy component removing system (3) comprises a Ne-22 isotope product heavy component removing tower (13), wherein the top of the Ne-22 isotope product heavy component removing tower (13) is sequentially connected with a Ne-22 gas outlet heavy component removing tower stop valve (14) and a neon rewarming winding pipe (15) at the top of the heavy component removing tower, the bottom of the Ne-22 isotope product heavy component removing tower (13) is connected with a heavy component removing tower waste liquid discharge stop valve (33) for removing heavy component impurities, and a feed inlet of the Ne-22 isotope product heavy component removing tower (13) is connected with a discharge outlet at the bottom of a III-level low-temperature rectifying tower (12);
still include thermal diffusion method Ne-22 crude gas production waste heat utilization system (4), thermal diffusion method Ne-22 crude gas production waste heat utilization system (4) include three reboiler (31), reboiler (31) are connected respectively in the bottom of I level cryogenic rectification tower (10), II level cryogenic rectification tower (11), III level cryogenic rectification tower (12), I level thermal diffusion separation post (6), II level thermal diffusion separation post (7), III level thermal diffusion separation post (8) upper end all are connected with blast pipe (32) that have the stop valve, blast pipe (32) are connected with reboiler (31) on I level cryogenic rectification tower (10) on I level thermal diffusion separation post (6), blast pipe (32) are connected with reboiler (31) on II level cryogenic rectification tower (11) on II level thermal diffusion separation post (7), blast pipe (32) are connected with reboiler (31) on III level cryogenic rectification tower (12) on III level thermal diffusion separation post (8).
2. The apparatus for efficiently separating Ne-22 isotopes of claim 1, wherein: the I-stage thermal diffusion separation column (6) comprises m parallel sub-thermal diffusion separation columns (16), the II-stage thermal diffusion separation column (7) comprises n parallel sub-thermal diffusion separation columns (16), the upper end and the lower end of each sub-thermal diffusion separation column (16) are respectively provided with a circulating water outlet (17) and a circulating water inlet (18), the outer wall surface of each sub-thermal diffusion separation column (16) forms a cold wall surface, the axle center of each sub-thermal diffusion separation column (16) is provided with an electric heating wire, and the electric heating wire forms a hot wall surface.
3. An apparatus for efficiently separating Ne-22 isotopes according to claim 1 or 2, wherein: the novel high-purity helium recovery system is characterized by further comprising a helium heat exchanger (19), the bottom of the III-level thermal diffusion separation column (8) is connected with a low-temperature rectification system raw material gas pipeline (20), a Ne-22 gas filter (5) is connected to the low-temperature rectification system raw material gas pipeline (20), the Ne-22 gas filter (5) is provided with a first pipeline (21) and a second pipeline (22) respectively, the first pipeline (21) is connected with a feeding port of the I-level thermal diffusion separation column (6), stop valves are arranged on the first pipeline (21) and the second pipeline (22), the second pipeline (22) is collected with the first pipeline (21) after passing through the helium heat exchanger (19), a branch (23) is connected to an outlet of the heavy-duty recovery tower top neon recovery tube (15), the branch (23) is connected with a recovery helium recovery tube (24) after passing through the helium heat exchanger (19), and the recovery helium recovery tube (24) is connected with high-purity helium filling.
4. An apparatus for efficiently separating Ne-22 isotopes according to claim 1 or 2, wherein: the I-level low-temperature rectifying tower comprises a plurality of efficient structured packing towers (25) which are connected in parallel, each efficient structured packing tower (25) comprises a helium gas cold source condenser (26), and each helium gas cold source condenser (26) is located at the top of each efficient structured packing tower (25).
5. The apparatus for efficiently separating Ne-22 isotopes of claim 2, wherein: the circulating cooling water pipeline comprises a circulating water branch (27) and a circulating refrigeration branch (28) with circulating refrigerant, wherein two ends of the circulating water branch (27) are respectively connected to a circulating water outlet (17) and a circulating water inlet (18) of the sub-thermal diffusion separation column (16), a heat exchanger (29) is connected to the circulating water branch (27), two ends of the circulating refrigeration branch (28) are connected to the heat exchanger (29), and a compressor (30) is connected to the circulating refrigeration branch (28).
6. The apparatus for efficiently separating Ne-22 isotopes of claim 1, wherein: the reboiler (31) at the bottom of the II-stage cryogenic rectification tower (11) extends and is provided with two branches, one branch is connected with the top of the II-stage thermal diffusion separation column (7), and the other branch is converged with the upper exhaust pipe (32) of the III-stage thermal diffusion separation column (8).
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