CN106800281A - A kind of gas cleaning plant of high-pure helium 3 and purification method - Google Patents

A kind of gas cleaning plant of high-pure helium 3 and purification method Download PDF

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CN106800281A
CN106800281A CN201710040428.2A CN201710040428A CN106800281A CN 106800281 A CN106800281 A CN 106800281A CN 201710040428 A CN201710040428 A CN 201710040428A CN 106800281 A CN106800281 A CN 106800281A
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gas
helium
cuo
control valve
closed
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CN106800281B (en
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吴文清
石岩
罗德礼
熊义富
敬文勇
蔚勇军
常元庆
宋智蓉
刘浪
房满权
武志刚
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    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B23/00Noble gases; Compounds thereof
    • C01B23/001Purification or separation processes of noble gases
    • C01B23/0036Physical processing only
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00Purification or separation of specific gases
    • C01B2210/0026Isotopes of the specific gas
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00Purification or separation of specific gases
    • C01B2210/0029Obtaining noble gases
    • C01B2210/0031Helium
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00Purification or separation of specific gases
    • C01B2210/0043Impurity removed
    • C01B2210/0045Oxygen
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00Purification or separation of specific gases
    • C01B2210/0043Impurity removed
    • C01B2210/0046Nitrogen
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00Purification or separation of specific gases
    • C01B2210/0043Impurity removed
    • C01B2210/0053Hydrogen
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00Purification or separation of specific gases
    • C01B2210/0043Impurity removed
    • C01B2210/0062Water

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  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Gas Separation By Absorption (AREA)
  • Separation Of Gases By Adsorption (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

The present invention discloses a kind of gas cleaning plant of high-pure helium 3 and purification method, and the device includes being sequentially connected in series gas standard tank, the Zr to form closed-loop path by sealing pipeline2Fe, CuO, molecular sieve bed and circulating pump;The closed-loop path is communicated with a sampler by sealing pipeline.Purification method includes, evacuation treatment is carried out to purifier;The first control valve is closed, the unstrpped gas of helium 3 is introduced into gas cleaning plant, adjust Zr2Fe, CuO and molecular sieve bed are to operating temperature;The unstrpped gas of helium 3 is circulated in the closed-loop path, opens the first control valve, and analysis is sampled to the gas of helium 3 by sampler, if as a result meeting the requirements, the product gas of helium 3 is transferred in gas standard tank by gas circulator.The gas cleaning plant of high-pure helium 3 and purification method that the present invention is provided, can efficiently and rapidly obtain the gas of helium 3 of high-purity, realize effective utilization of the gas of helium 3.

Description

A kind of gas cleaning plant of high-pure helium -3 and purification method
Technical field
The present invention relates to the gas purification technique of helium -3 field, more particularly to a kind of gas cleaning plant of high-pure helium -3 and net Change method.
Background technology
Helium -3 is one of two kinds of stable isotopes of helium in nature, few in the storage of nature, in natural helium Atom abundance be only 0.000137%.Presently used helium -3 is typically derived from the decay of tritium, and tritium is the product of nuclear reactor Thing, while being also the main component of hydrogen bomb.Therefore, the source of helium -3 is extremely limited, far can not meet current application with research Demand.
Write articles in U.S. scientific magazine within 2009 according to ADRIAN CHO, in past 5 years, helium -3 is mainly applied In neutron detector and neutron scattering field.2002, Department of Homeland Security of the U.S. and Ministry of Energy (DOE) started to be equipped with thousands of " filling the neutron detector of helium -3 ", to prevent the smuggling of radioactive material plutonium.According to DOE data, the U.S. will very to the demand of helium -3 Increase to annual 65,000L soon, and the supply of the gas of helium -3 is by only annual 10,000~20,000L.
The gas of helium -3 is also used for large-scale neutron scattering facility, such as Japan Tokai newly-built Japanese proton precessional magnetometer (Japan Proton Accelerator Research Complex), it is contemplated that in following 6 years, to ensure its normal operation, need About 100,000 liters of helium -3.Otherwise, its effect of the facility of 1,500,000,000 dollars of this cost will be not in full use.In low-temperature physics side Face, the demand to helium -3 is mainly as the new dilution refrigeration machine for building fills refrigeration work material.This kind of demand is about often 2500~4500L of year.At present, many experiments on quantum computer and nano science, it is desired in (dilution refrigeration machine offer ) low temperature environment of below 100mK carries out.Helium -3 is additionally operable to the magnetic resonance imaging of medical field, when patient inhales the gas of helium -3 When entering lung, the diagnostic information that imaging is given will be greatly increased.
One important purposes of the gas of helium -3 is exactly to be applied to neutron tube research and development.Life of the neutron measurement technology in nuclear weapon Product, stock and arms control have a wide range of applications in verifying.The neutron counter tube of helium -3 is that a kind of neutron measurement of excellent performance is visited Head, because its use is closely related with military use, the introduction of the neutron counter tube of helium -3 and its gas of core material helium -3 is received The abroad strict limitation of developed country.Therefore, the country is necessary, by research and development, to develop the neutron of helium -3 for possessing intellectual property Counting tube.Chemical purity requirement of the neutron tube to the gas of helium -3 is very high, typically more than 99.99%.
The current gas of helium -3 is mainly derived from tritium decay, but in production in gas, storage and transport process, easily produces The foreign gases such as oxygen, nitrogen, water and hydrogen.
The content of the invention
It is an object of the invention to provide a kind of gas cleaning plant of high-pure helium -3 and purification method, to solve above-mentioned existing skill The problem that art is present, can efficiently and rapidly obtain helium -3 gas of the purity higher than 99.99%, realize the effective of the gas of helium -3 Utilize.
To achieve the above object, the invention provides following technical scheme:
The present invention discloses a kind of gas cleaning plant of high-pure helium -3, including:It is sequentially connected in series to form closure by sealing pipeline The gas standard tank in loop, Zr2Fe, CuO, molecular sieve bed and circulating pump;The closed-loop path is by sealing pipeline communication There is a sampler.
Optionally, the gas standard tank, Zr2Fe, CuO, molecular sieve bed, circulating pump and sampler and the sealing Pipeline junction is provided with control valve, and the sampler is the first control with the control valve of the sealing pipeline junction Valve, the gas standard tank and the Zr2Control valve between Fe is the second control valve.
Optionally, the Zr2Fe includes outer envelope, the Zr2Dust filter unit is disposed with Fe outer envelopes, is added Hot device and temperature thermocouple, the Zr2The bed body of Fe uses full soldering and sealing structure.
Optionally, described CuO includes outer envelope, and dust filter unit, heater are disposed with the CuO outer envelopes And temperature thermocouple, described CuO bed body is using full soldering and sealing structure.
Use what the gas cleaning plant of high-pure helium -3 described above was purified to the gas of helium -3 invention additionally discloses a kind of Method, comprises the following steps:
The design processing of a, cleaning system;Zr2Encapsulation Zr in Fe2Fe alloying pellets, granularity is 20~80 mesh;CuO Interior encapsulation CuO oxide particles, granularity is encapsulation 13X type molecular sieves in 20~80 mesh, molecular sieve bed;
The pretreatment of b, cleaning system;By Zr2Fe, CuO and molecular sieve bed are separately heated to 450-5500 DEG C, 150- 250 DEG C, 150-2500 DEG C, all control valves are opened, external vavuum pump carries out evacuating treatment to below 10Pa to purifier;
The many circulation absorptions purification of c, the gas of helium -3;The first control valve is closed, by a certain amount of unstrpped gas of helium -3 certainly Gas standard tank introduces gas cleaning plant, former according to foreign gas content in unstrpped gas and the estimation purification of adsorbent bed amount of filler Expect the volume of the gas of helium -3, adjust Zr2Fe, CuO and molecular sieve bed to operating temperature, respectively 250 DEG C, 500 DEG C, 25 ℃;The unstrpped gas of helium -3 is circulated in the closed-loop path, and Zr is flowed through successively2Fe, CuO, molecular sieve bed and Zr2Fe.
D, result detection;The first control valve is opened, analysis is sampled to the gas of helium -3 by sampler, if impurity contains Amount not up to requires, then repeatedly step c;If sampling analysis result meets the requirements, the first control valve and the second control are closed , be transferred to the product gas of helium -3 in gas standard tank by gas circulator by valve, terminates purification process.
Optionally, the pressure difference of relative constancy is maintained in step c using circulating pump, it is ensured that purifier is in the gas purification of helium -3 During have circulation driving force higher.
Optionally, also including step e;After purification is finished, under purifier operating temperature, all control valves are opened, Purifier is evacuated to below 10Pa by external vavuum pump, and maintains 60min;Cleaning system naturally cools to room temperature, closes net All control valves that makeup is put.
The gas cleaning plant of high-pure helium -3 disclosed by the invention and purification method compared with prior art, with following technology Effect:
The invention provides a kind of gas cleaning plant of high-pure helium -3 and purification method, high-pure helium -3 is prepared using the method Gas, by different adsorbent beds of connecting, Adsorption respectively is carried out to different impurities gas.During circularly purifying, constantly Foreign gas in the gas of helium -3 is adsorbed, after continuous circulation a period of time, the gas purity of helium -3 is improved significantly.Should Method can effectively go the foreign gases such as deoxygenation, nitrogen, water and hydrogen.The product gas chemical purity of helium -3 is set to reach 99.99%, Realize effective utilization of the gas of helium -3.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment The accompanying drawing for needing to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the invention Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these accompanying drawings Obtain other accompanying drawings;
Fig. 1 is the gas cleaning plant of high-pure helium -3 structural representation of the present invention;
Description of reference numerals:1 is sealing pipeline, and 2 is gas standard tank, and 3 is Zr2Fe, 4 be CuO, 5 be molecular sieve Bed, 6 is circulating pump, and 7 is sampler, and 8 is the first control valve, and 9 is the second control valve.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of protection of the invention.
It is an object of the invention to provide a kind of gas cleaning plant of high-pure helium -3 and purification method, to solve above-mentioned existing skill The problem that art is present, can efficiently and rapidly obtain helium -3 gas of the purity higher than 99.99%, realize the effective of the gas of helium -3 Utilize.
To achieve the above object, the invention provides following technical scheme:
The present invention discloses a kind of gas cleaning plant of high-pure helium -3, including:It is sequentially connected in series to form closure by sealing pipeline The gas standard tank in loop, Zr2Fe, CuO, molecular sieve bed and circulating pump;The closed-loop path is by sealing pipeline communication There is a sampler.
Use what the gas cleaning plant of high-pure helium -3 described above was purified to the gas of helium -3 invention additionally discloses a kind of Method, comprises the following steps:
The design processing of a, cleaning system;Zr2Encapsulation Zr in Fe2Fe alloying pellets, granularity is 20~80 mesh;CuO Interior encapsulation CuO oxide particles, granularity is encapsulation 13X type molecular sieves in 20~80 mesh, molecular sieve bed;
The pretreatment of b, cleaning system;By Zr2Fe, CuO and molecular sieve bed are separately heated to 450-5500 DEG C, 150- 250 DEG C, 150-2500 DEG C, all control valves are opened, external vavuum pump carries out evacuating treatment to below 10Pa to purifier;
The many circulation absorptions purification of c, the gas of helium -3;The first control valve is closed, by a certain amount of unstrpped gas of helium -3 certainly Gas standard tank introduces gas cleaning plant, former according to foreign gas content in unstrpped gas and the estimation purification of adsorbent bed amount of filler Expect the volume of the gas of helium -3, adjust Zr2Fe, CuO and molecular sieve bed to operating temperature, respectively 250 DEG C, 500 DEG C, 25 ℃;The unstrpped gas of helium -3 is circulated in the closed-loop path, and Zr is flowed through successively2Fe, CuO, molecular sieve bed and Zr2Fe.
D, result detection;The first control valve is opened, analysis is sampled to the gas of helium -3 by sampler, if impurity contains Amount not up to requires, then repeatedly step c;If sampling analysis result meets the requirements, the first control valve and the second control are closed , be transferred to the product gas of helium -3 in gas standard tank by gas circulator by valve, terminates purification process.
It is below in conjunction with the accompanying drawings and specific real to enable the above objects, features and advantages of the present invention more obvious understandable Mode is applied to be described in further detail to originally new.
As shown in figure 1, the present invention provides a kind of gas cleaning plant of high-pure helium -3, including:Gone here and there successively by sealing pipeline 1 Connection forms the gas standard tank 2, Zr of closed-loop path2Fe 3, CuO 4, molecular sieve bed 5 and circulating pump 6;The closed-loop path leads to Cross seal pipe road 1 and be communicated with a sampler 7;The gas standard tank 2, Zr2Fe 3, CuO 4, molecular sieve bed 5, circulating pump 6 Control valve is provided with sampler 7 and sealing pipeline 1 junction, the sampler 7 is connected with the sealing pipeline 1 The control valve at place is the first control valve 8, the gas standard tank 2 and the Zr2Control valve between Fe 3 is second Control valve 9.
The Zr2Fe 3 is identical with CuO 4 structures, respectively including outer envelope, Zr2Fe 3 and described CuO 4 Dust filter unit, heater and temperature thermocouple, the Zr are disposed with outer envelope2The bed of Fe 3 and described CuO 4 Body uses full soldering and sealing structure.
In an embodiment, it is the cylindric rustless steel container of 20L, the gas that the gas standard tank 2 is integrated product The unstripped gas of helium -3 air inlet and the product gas of helium -3 gas outlet are offered in standard can 2, control valve is respectively arranged with thereon;It is described Vavuum pump is circumscribed with sealing pipeline, the vavuum pump is detachable.
The present invention also provides what a kind of use gas cleaning plant of high-pure helium -3 described above was purified to the gas of helium -3 Method, comprises the following steps:
The design processing of a, cleaning system;Zr2Encapsulation Zr in Fe 32Fe alloying pellets, granularity is 20~80 mesh;CuO Encapsulation CuO oxide particles in bed 4, granularity is encapsulation 13X type molecular sieves in 20~80 mesh, molecular sieve bed 5;
The pretreatment of b, cleaning system;By Zr2Fe 3, CuO 4 and molecular sieve bed 5 be separately heated to 450-5500 DEG C, 150-250 DEG C, 150-2500 DEG C, open all control valves in addition to the air inlet of gas standard can 2 and gas outlet control valve Door, external vavuum pump carries out evacuating treatment to below 10Pa to purifier;
The many circulation absorptions purification of c, the gas of helium -3;The first control valve 8 is closed, by a certain amount of unstrpped gas of helium -3 certainly Gas standard tank 2 introduces gas cleaning plant, according to foreign gas content in unstrpped gas and the estimation purification of adsorbent bed amount of filler The volume of the gas of raw material helium -3, adjusts Zr2Fe 3, CuO 4 and molecular sieve bed 5 to optimum working temperature, respectively 200~ 300 DEG C, 450~550 DEG C, -50~25 DEG C;The Zr2Fe 3, CuO 4 and the operating temperature of molecular sieve bed 5 respectively can be optimal Operating temperature fluctuates 50 DEG C;The unstrpped gas of helium -3 is circulated in the closed-loop path, and Zr is flowed through successively2Fe 3, CuO 4th, molecular sieve bed 5 and Zr2Fe 3.The pressure difference of relative constancy is maintained using circulating pump, it is ensured that purifier is in the gas purification of helium -3 During have circulation driving force higher.
D, result detection;The first control valve 8 is opened, analysis is sampled to the gas of helium -3 by sampler, if impurity Content is not up to requirement, then repeatedly step c;If sampling analysis result meets the requirements, the first control valve 8 and the second control are closed , be transferred to the product gas of helium -3 2 in gas standard tank by gas circulator by valve processed 9, terminates purification process.
E, experiment post processing;After purification is finished, the product gas of helium -3 in gas standard tank are transferred to elsewhere, net Makeup is put under operating temperature, opens all control valves in addition to the air inlet of gas standard can 2 and gas outlet control valve, outward Connect vavuum pump and purifier is evacuated to below 10Pa, and maintain 60min;Cleaning system naturally cools to room temperature, closes purification All control valves of device.
A kind of gas cleaning plant of high-pure helium -3 and purification method that the present invention is provided, high-pure helium -3 is prepared using the method Gas, by different adsorbent beds of connecting, Adsorption respectively is carried out to different impurities gas.During circularly purifying, constantly Foreign gas in the gas of helium -3 is adsorbed, after continuous circulation a period of time, the gas purity of helium -3 is improved significantly.Should Method can effectively go the foreign gases such as deoxygenation, nitrogen, water and hydrogen.Realize effective utilization of the gas of helium -3.
Apply specific case in this specification to be set forth principle of the invention and implementation method, above example Explanation be only intended to help and understand the method for the present invention and its core concept;Simultaneously for those of ordinary skill in the art, According to thought of the invention, will change in specific embodiments and applications.In sum, in this specification Appearance should not be construed as limiting the invention.

Claims (7)

1. a kind of gas cleaning plant of high-pure helium -3, it is characterised in that:Closed back including being sequentially connected in series to be formed by sealing pipeline The gas standard tank on road, Zr2Fe, CuO, molecular sieve bed and circulating pump;The closed-loop path is communicated with by sealing pipeline One sampler.
2. the gas cleaning plant of high-pure helium -3 according to claim 1, it is characterised in that:The gas standard tank, Zr2Fe Bed, CuO, molecular sieve bed, circulating pump and sampler are provided with control valve, the sampling with the sealing pipeline junction Device is the first control valve, the gas standard tank and the Zr with the control valve of the sealing pipeline junction2Fe beds Between control valve be the second control valve.
3. the gas cleaning plant of high-pure helium -3 according to claim 1, it is characterised in that:The Zr2Fe includes Zr2Fe Outer envelope, the Zr2Dust filter unit, heater and temperature thermocouple, the Zr are disposed with Fe outer envelopes2Fe Bed body uses full soldering and sealing structure.
4. the gas cleaning plant of high-pure helium -3 according to claim 1, it is characterised in that:Described CuO includes CuO outsourcings Shell, is disposed with dust filter unit, heater and temperature thermocouple in the CuO outer envelopes, described CuO bed body is used Full soldering and sealing structure.
5. a kind of method purified to the gas of helium -3, it is characterised in that comprise the following steps:
The design processing of a, cleaning system;Zr2Encapsulation Zr in Fe2Fe alloying pellets, granularity is 20~80 mesh;Envelope in CuO Dress CuO oxide particles, granularity is encapsulation 13X type molecular sieves in 20~80 mesh, molecular sieve bed;
The pretreatment of b, cleaning system;By Zr2Fe, CuO and molecular sieve bed be separately heated to 450-550 DEG C, 150-250 DEG C, 150-250 DEG C, all control valves are opened, external vavuum pump carries out evacuating treatment to below 10Pa to purifier;Vacuumize The control valve closed at vavuum pump after the completion for the treatment of;
The many circulation absorptions purification of c, the gas of helium -3;The first control valve is closed, by a certain amount of unstrpped gas of helium -3 from gas Standard can introduces gas cleaning plant, according to foreign gas content in unstrpped gas and adsorbent bed amount of filler estimation purification raw material The volume of the gas of helium -3, adjusts Zr2Fe, CuO and molecular sieve bed are to operating temperature, respectively 250 DEG C, 500 DEG C, 25 DEG C; The unstrpped gas of helium -3 is circulated in the closed-loop path, and Zr is flowed through successively2Fe, CuO, molecular sieve bed and Zr2Fe.
D, result detection;The first control valve is opened, analysis is sampled to the gas of helium -3 by sampler, if impurity content is not Requirement is reached, then repeatedly step c;If sampling analysis result meets the requirements, the first control valve and the second control valve are closed, The product gas of helium -3 are transferred in gas standard tank by gas circulator, terminate purification process.
6. the method for gas purification of high-pure helium -3 according to claim 5, it is characterised in that:Tieed up using circulating pump in step c Hold the pressure difference of relative constancy, it is ensured that purifier has circulation driving force higher in the gas purification process of helium -3.
7. the method for gas purification of high-pure helium -3 according to claim 5, it is characterised in that:Also include step e;Purification is finished Afterwards, under purifier operating temperature, all control valves are opened, purifier is evacuated to below 10Pa by external vavuum pump, And maintain 60min;Cleaning system naturally cools to room temperature, closes all control valves of purifier.
CN201710040428.2A 2017-01-20 2017-01-20 A kind of -3 gas cleaning plant of high-pure helium and purification method Active CN106800281B (en)

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN114684799A (en) * 2020-12-30 2022-07-01 中国科学院理化技术研究所 Equipment and method for exploiting lunar helium 3
CN114931840A (en) * 2022-06-02 2022-08-23 散裂中子源科学中心 Helium three-gas purification system

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CN105304155A (en) * 2015-08-04 2016-02-03 清华大学 Optimization and purification system and regeneration method of high temperature gas cooled reactor by utilizing coolants
CN205122213U (en) * 2015-08-24 2016-03-30 清华大学 High temperature gas cooled piles and optimizes helium purification regeneration system

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CN1088995A (en) * 1992-12-29 1994-07-06 北京有色金属研究总院 High firmness is inhaled hydrogen and isotropic substance getter thereof
CN204257223U (en) * 2014-12-12 2015-04-08 中国工程物理研究院材料研究所 A kind of detritiation purification plant
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114684799A (en) * 2020-12-30 2022-07-01 中国科学院理化技术研究所 Equipment and method for exploiting lunar helium 3
CN114684799B (en) * 2020-12-30 2023-09-15 中国科学院理化技术研究所 Mining equipment and mining method for lunar helium 3
CN114931840A (en) * 2022-06-02 2022-08-23 散裂中子源科学中心 Helium three-gas purification system
CN114931840B (en) * 2022-06-02 2024-02-13 散裂中子源科学中心 Helium three-gas purifying system

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