CN105347305B - A kind of tritium gas purification system - Google Patents
A kind of tritium gas purification system Download PDFInfo
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- CN105347305B CN105347305B CN201510800409.6A CN201510800409A CN105347305B CN 105347305 B CN105347305 B CN 105347305B CN 201510800409 A CN201510800409 A CN 201510800409A CN 105347305 B CN105347305 B CN 105347305B
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Abstract
The invention belongs to gas purification technology field, a kind of tritium gas purification system is disclosed.The tritium gas that the system includes to be interconnected or disconnecting by valve introduces system, circulation separation system and tail gas monitoring system；The tritium gas, which introduces system, includes vavuum pump, cold-trap, surge flask, vacuum meter and storage tritium uranium powder bottle to be purified；The circulation separation system includes two flow type uranium beds, storage tritium uranium bed and circulating pump；Two flow type uranium beds and storage tritium uranium bed are concatenated by pipeline and are provided with electric heating equipment；Two flow type uranium beds realize that the release after attached to the miscellaneous aspiration beyond tritium helium and tritium gas storage and storage, the tritium gas after purification of storage tritium uranium bed storage release, and storage tritium uranium bed are connected by pipeline with the tail gas hold-up tank of tail gas monitoring system respectively；The tail gas monitoring system includes tail gas hold-up tank, tail gas monitoring pressure gauge and circulating pump；The purification system has the tritium gas rate of recovery close to 100%, tritium purity up to more than 99% and safe operation, simple advantage.
Description
Technical field
The invention belongs to gas purification technology field, and in particular to a kind of tritium gas purification system.
Background technology
Tritium is the radio isotope of hydrogen, and with toxicity is relatively low, specific activity is higher, that radioactive automatic developing is well-behaved is excellent
Point, is widely used to the fields such as science tracer study, self-emissive light source, tritium target development, but also be the combustion of controllable nuclear fusion
Material.A large amount of tritiums are generally stored in metal tritides form, especially the most universal with uranium tritide.
Uranium tritide is that one kind is acknowledged as preferably storing tritium material, and there is relatively low balance to decompose mainly due to it for this
Pressure, desorption temperature, larger reversible suction tritium capacity, faster desorption rate, the seeping at high temperature loss that tritium can be prevented effectively from and tritium
The advantages of aging effect is slight.It is that the heating in hydrogen (containing tritium gas) of metallic uranium bits can adsorb tritium that it, which stores tritium principle, wherein adding
Heat is to 150 DEG C, and the speed of uranium powder absorption tritium is most fast, and it is that can react generation uranium hydride to be heated to 255 DEG C, and uranium hydride is the optimal of tritium
Storage form.During using tritium gas, it uranium hydride is warming up to 350~400 DEG C can decompose and discharge tritium gas.The chemical reaction of tritium and uranium
For：2U+3T2→2UT3。
Above-mentioned reaction is a reversible reaction, and while uranium absorption tritium gas reaction generation uranium tritide, uranium tritide is also adding
Decomposed in thermal process and discharge tritium gas, when the gas molecule of absorption is identical with the gas molecula number of desorption release, reaction reaches
To balance.
When tritium long-term storage in uranium tritide powder bottle, the tritium in uranium tritide is decayed into through β3He, when3He amount, which reaches, faces
It after boundary's concentration, will largely discharge, reduce the purity of tritium, directly affect the application of tritium.In addition, in the storing of tritium, cold
But or during transport etc., steam is acted in tritium and ambiance, can produce O2、N2、NH3、CH4, CO and CO2Etc. miscellaneous gas.Therefore
The tritium stored for a long time must purified before, to ensure the purity of tritium.Conventional tritium gas purifying at present is to utilize Pd-Ag diffusions
What film was purified, the method is purified suitable for extensive tritium gas, cost is higher and tail gas in remain tritium, the tritium rate of recovery is relatively
It is low.Therefore, need that a kind of tritium gas rate of recovery is high at present, purity is high and simple to operate be applied to that small lot tritium gas purifies be
System.
The content of the invention
(1) goal of the invention
According to the problems of prior art, the invention provides a kind of tritium gas rate of recovery is high, purity is high and operation is simple
Single tritium gas purification system.
(2) technical scheme
In order to solve the problems of prior art, the present invention is achieved by the following technical solutions：
A kind of tritium gas purification system, the tritium gas that the system includes to be interconnected or disconnecting by valve introduces system, followed
Ring piece-rate system and tail gas monitoring system；The tritium gas, which introduces system, to be included vavuum pump, cold-trap, surge flask, vacuum meter and treats pure
Change storage tritium uranium powder bottle, wherein storage tritium uranium powder bottle to be purified provides tritium gas for whole purification system, vavuum pump passes through pipeline with cold-trap
Connection, and from cold-trap draw pipeline by four-way respectively with surge flask, vacuum meter, detritiation uranium powder bottle to be purified and multi-cycle separation
System is connected；
The circulation separation system includes two flow type uranium beds, a storage tritium uranium bed and a circulating pump；Two of which
Flow type uranium bed is respectively the first flow type uranium bed and second according to the order apart from storage tritium uranium powder bottle to be purified from the close-by examples to those far off
Formula uranium bed, and the first flow type uranium bed, the second flow type uranium bed and storage tritium uranium bed are by pipeline concatenation and are provided with electric add
Hot equipment；First flow type uranium bed is realized attached to the miscellaneous aspiration beyond tritium helium；Second flow type uranium bed realize tritium gas storage and
Release after storage, the tritium gas after purification that the uranium bed storage of storage tritium discharges from the second flow type uranium bed, and storage tritium uranium bed passes through pipe
Road is connected with the tail gas hold-up tank of tail gas monitoring system；
The tail gas monitoring system includes tail gas hold-up tank, tail gas monitoring pressure gauge and circulating pump；Wherein tail gas monitoring is pressed
Power table and circulating pump are located at the top of tail gas hold-up tank, and the circulating pump introduces system and the with tritium gas respectively by pipeline and threeway
One flow type uranium bed is connected.
Preferably, the heating-up temperature of the electric heating equipment set on storage tritium uranium powder bottle to be purified is 400~500 DEG C；First
The heating-up temperature of the electric heating equipment set on flow type uranium bed is 600~700 DEG C；The electricity set on second flow type uranium bed adds
The heating-up temperature of hot equipment is set to 150 DEG C when storing tritium, and 400~500 DEG C are set to during release tritium；Store and set on tritium uranium bed
Electric heating equipment temperature setting be 150~255 DEG C.
Preferably, it is filled with uranium powder in the first flow type uranium bed, the second flow type uranium bed and storage tritium uranium bed.
Preferably, the tritium gas, which is introduced into system, is provided with introducing gas-monitoring pressure gauge, to indicate storage tritium uranium to be purified
The pressure of the tritium gas discharged in powder bottle, when pressure is more than 1 atmospheric pressure, opening the valve below surge flask enters tritium gas
Surge flask.
Preferably, the material of the detritiation uranium powder bottle to be purified, cold-trap, surge flask and pipeline is stainless steel；Wherein manage
Road is the stainless steel pipes that inner surface is polished, to reduce tritium gas adsorbance, helium and other gases.
Preferably, the first flow type uranium bed, the second flow type uranium bed and storage tritium uranium bed are to advance with Hydrogen activation
Uranium bed, and the upper end of three uranium bed seals.
Before storage tritium uranium powder bottle progress tritium gas purifying to be purified, first to the first flow type uranium bed and the second flow type uranium bed
After it is fully activated using hydrogen and removes hydrogen totally, and it is respectively connected to purification system.
When purifying tritium gas using the purification system, its operating method is：Purification system is vacuumized first with vavuum pump, made
Vacuum is better than 10-2Pa；The firing equipment on the first flow type uranium bed and the second flow type uranium bed is opened, makes to set its temperature respectively
Spend for 600 DEG C, 150 DEG C, the firing equipment then opened on storage tritium uranium powder bottle to be purified makes its temperature be to slowly warm up to 430 DEG C,
The mixed gas such as tritium helium start to discharge and be introduced into system into tritium gas from storage tritium uranium powder bottle to be purified.Tritium gas is introduced into system
The pressure that the mixed gas of introducing indicates pressure gauge rises, and the pressure that observation pressure gauge is indicated, control pressure is no more than
101KPa, opens the valve below surge flask if pressure is more than 101KPa, portion gas is introduced into surge flask and carries out again
Purifying.Mixed gas enters the first flow type uranium bed by other gas absorptions in addition to tritium and helium by pipeline, and tritium helium is mixed
Close gas and enter the second flow type uranium bed by tritium gas quick adsorption, helium is stored with a small amount of tritium gas not to be adsorbed into tail gas
Tank, opens turbo-circulator by miscellaneous gas circular treatment, again through pipeline enter the first flow type uranium bed, the second flow type uranium bed and
Tritium uranium bed is store, the miscellaneous gas throughputs such as helium are then indicated by pressure gauge on tail gas hold-up tank.The gas isolated and purified when needs
All by cyclic separation device, and after pressure gauge shows that atmospheric pressure value no longer changes on tail gas hold-up tank, point of halt system
From.Close all valves in addition to two valves above storage tritium uranium bed, the second flow type uranium of heating bed (controls the temperature to be
400~500 DEG C) and storage tritium uranium bed (255 DEG C of temperature of control), the tritium gas adsorbed in the second flow type uranium bed in a heated condition can
It is transferred in storage tritium uranium bed and stores through pipeline.
(3) beneficial effect
When being purified using the tritium gas purification system that provides of the present invention to tritium gas, with the tritium gas rate of recovery close to 100%,
Tritium purity is up to more than 99% and safe operation, simple beneficial effect.Specific explanations are：
1) present invention introduces system, circulation separation system and tail gas monitoring system to storage tritium uranium powder bottle to be purified using tritium gas
Purified, the difference of the absorbent properties using the uranium under condition of different temperatures to tritium gas and to mixed gas such as tritium helium, designed
The separator that multiple temperature control uranium beds are combined reaches the quick separating of the miscellaneous gas such as tritium and helium, and system is sealedly stainless
Steel system, can effectively reduce the risk of tritium leakage.
2) the cold-trap design that tritium gas is introduced into system, can further improve and keep vacuum.This mainly due to
Under condition of high vacuum degree, the gas in system reaches standing balance, and vacuum is difficult to improve again, and utilizes liquid nitrogen to be broken after cooling gas
Balance is broken, system vacuum is improved.In system the gas for being difficult to be extracted of residual be easier in the case of low temperature, also by
Vacuum pumped.
3) circulating pump provided in tail gas monitoring system continues on through the tritium gas and other miscellaneous gas of not store the bed absorption of tritium uranium
The first flow type uranium bed, the second flow type uranium bed and storage tritium uranium bed are crossed, O is further removed2、N2、NH3、CH4, CO and CO2Deng impurity
Gas, and further by the absorption of remaining tritium gas in storage tritium uranium bed.
Brief description of the drawings
Fig. 1 is the tritium gas purification system schematic diagram that the application is provided；Wherein 1 is vavuum pump；2、4、5、6、8、12、13、14、
18th, 19,20,22,23,25,26,27,28,31,32,34,35 be valve；3 be cold-trap；7th, 9 be surge flask；10 be introducing
Gas-monitoring pressure gauge；11 be storage tritium uranium powder bottle to be purified；15 be vacuum meter；16th, 21,29,33 be temperature sensor；17 are
First flow type uranium bed；24 be the second flow type uranium bed；28 be circulating pump；30 be storage tritium uranium bed；36 be tail gas hold-up tank；37 are
Tail gas monitors pressure gauge.
Embodiment
The present invention will combine embodiment and Figure of description, and the present invention is further elaborated.
A kind of tritium gas purification system, as shown in Figure 1.The tritium gas that the system includes to be interconnected or disconnecting by valve draws
Enter system, circulation separation system and tail gas monitoring system；The tritium gas introduce system include vavuum pump 1, cold-trap 3, surge flask 7,
9th, vacuum meter 15 and storage tritium uranium powder bottle 11 to be purified, wherein storage tritium uranium powder bottle 11 to be purified provides tritium gas for whole purification system,
Vavuum pump 1 is connected with cold-trap 3 by pipeline, and from cold-trap 3 draw pipeline by four-way respectively with surge flask 7,9, vacuum meter
15th, detritiation uranium powder bottle 11 and circulation separation system to be purified are connected；
The circulation separation system includes two flow type uranium beds, a storage tritium uranium bed and a circulating pump；Two of which
Flow type uranium bed is respectively the first flow type uranium bed 17 and second according to the order apart from storage tritium uranium powder bottle to be purified from the close-by examples to those far off
Flow type uranium bed 24, and first flow type uranium bed the 17, second flow type uranium bed 24 and storage tritium uranium bed 30 concatenated and by pipeline
Electric heating equipment is provided with, storage tritium uranium bed 30 is connected by pipeline with the tail gas hold-up tank 36 of tail gas monitoring system；Wherein
Filled with uranium powder and the first flow type uranium bed in one flow type uranium bed the 17, second flow type uranium bed 24 and storage tritium uranium bed 30
17th, the second flow type uranium bed 24 and storage tritium uranium bed 30 are the uranium bed for advancing with Hydrogen activation, and the upper end of three uranium beds
Seal.
The tail gas monitoring system includes tail gas hold-up tank 36, tail gas monitoring pressure gauge 37 and circulating pump 28；Wherein tail gas
Monitor the top that pressure gauge 37 and circulating pump 28 are located at tail gas hold-up tank 36, the circulating pump 28 by pipeline and threeway respectively with tritium
Gas introduces system and the first flow type uranium bed 17 is connected；
Wherein, the heating-up temperature of the electric heating equipment set on storage tritium uranium powder bottle 11 to be purified is 400~500 DEG C；First
The heating-up temperature of the electric heating equipment set on flow type uranium bed 17 is 600~700 DEG C；Set on second flow type uranium bed 24
The heating-up temperature of electric heating equipment is set to 150 DEG C when storing tritium, and 400~500 DEG C are set to during release tritium；Store tritium uranium bed 30
The temperature setting of the electric heating equipment of upper setting is 150~255 DEG C.
The tritium gas, which is introduced into system, is provided with introducing gas-monitoring pressure gauge 10, to indicate in storage tritium uranium powder bottle to be purified
The pressure of the tritium gas discharged, when pressure is more than 1 atmospheric pressure, opening the valve of the lower section of surge flask 7 or/and 9 enters tritium gas
Enter surge flask；
The detritiation uranium powder bottle 11 to be purified, cold-trap 3, the material of surge flask 7,9 and pipeline are stainless steel；Wherein pipeline
The stainless steel pipes polished for inner surface, to reduce absorption tritium gas, helium and other gases.
Before storage tritium uranium powder bottle progress tritium gas purifying to be purified, first to the first flow type uranium bed and the second flow type uranium bed
After it is fully activated using hydrogen and removes hydrogen totally, and it is respectively connected to purification system.
When purifying tritium gas using the purification system, its operating method is：Valve used is first opened, using vavuum pump to purifying
System is vacuumized, and vacuum is better than 10-2Pa；The firing equipment on the first flow type uranium bed and the second flow type uranium bed is opened,
Make to set its temperature to be 600 DEG C, 150 DEG C respectively, the firing equipment then opened on storage tritium uranium powder bottle to be purified delays its temperature
Slow to be warming up to 430 DEG C, the mixed gas such as tritium helium starts to discharge and be introduced into system into tritium gas from storage tritium uranium powder bottle to be purified.
The pressure that tritium gas is introduced into the mixed gas introduced in system and indicates pressure gauge rises, the pressure that observation pressure gauge is indicated, control
Pressure is no more than 101KPa, and the valve below surge flask is opened if pressure is more than 101KPa, portion gas is introduced into buffering
Purified again in bottle.Mixed gas enters the first flow type uranium bed by pipeline and inhales other gases in addition to tritium and helium
Attached, tritium helium mixture enters the second flow type uranium bed and enters tritium gas quick adsorption, helium and a small amount of tritium gas not to be adsorbed
Tail gas hold-up tank, opens turbo-circulator by miscellaneous gas circular treatment, enters the first flow type uranium bed, the second circulation through pipeline again
Formula uranium bed and storage tritium uranium bed, then indicate the miscellaneous gas throughputs such as helium by pressure gauge on tail gas hold-up tank.When needing, separation is pure
The gas of change is all by separator, and after pressure gauge shows that atmospheric pressure value no longer changes on tail gas hold-up tank, halt system
Separation.Close all valves in addition to two valves above storage tritium uranium bed, heating the second flow type uranium bed (control temperature
For 400~500 DEG C) and store the tritium gas adsorbed in tritium uranium bed (255 DEG C of temperature of control), the second flow type uranium bed in a heated condition
It can be transferred to through pipeline in storage tritium uranium bed.
The storage tritium uranium powder bottle for storing up to more than 10 years is purified using the system, as a result shown：Through gas-chromatography point
Analysis, before processing sampling analysis tritium purity is 69.6%, and sampling analysis tritium purity is up to 99.9% after processing, and the rate of recovery is 99.97%.
Claims (6)
1. a kind of tritium gas purification system, it is characterised in that the tritium gas that the system includes to be interconnected or disconnecting by valve draws
Enter system, circulation separation system and tail gas monitoring system；The tritium gas, which introduces system, includes vavuum pump, cold-trap, surge flask, vacuum
Meter and storage tritium uranium powder bottle to be purified, wherein storage tritium uranium powder bottle to be purified provides tritium gas, vavuum pump and cold-trap for whole purification system
Connected by pipeline, and from cold-trap draw pipeline by four-way respectively with surge flask, vacuum meter, detritiation uranium powder bottle to be purified and
Circulation separation system is connected；
The circulation separation system includes two flow type uranium beds, a storage tritium uranium bed and a circulating pump；Two of which circulates
Formula uranium bed is respectively the first flow type uranium bed and the second flow type according to the order apart from storage tritium uranium powder bottle to be purified from the close-by examples to those far off
Uranium bed, and the first flow type uranium bed, the second flow type uranium bed and storage tritium uranium bed concatenate by pipeline and be provided with electrical heating and set
It is standby；First flow type uranium bed is realized attached to the miscellaneous aspiration beyond tritium helium；Second flow type uranium bed realizes the storage and storage of tritium gas
Release afterwards, the tritium gas after purification that storage tritium uranium bed storage discharges from the second flow type uranium bed, and storage tritium uranium bed by pipeline with
The tail gas hold-up tank of tail gas monitoring system is connected；
The tail gas monitoring system includes tail gas hold-up tank, tail gas monitoring pressure gauge and circulating pump；Wherein tail gas monitors pressure gauge
And circulating pump is located at the top of tail gas hold-up tank, the circulating pump introduces system and first-class with tritium gas respectively by pipeline and threeway
Formula uranium bed is connected.
2. a kind of tritium gas purification system according to claim 1, it is characterised in that set on storage tritium uranium powder bottle to be purified
The heating-up temperature of electric heating equipment is 400~500 DEG C；The heating-up temperature of the electric heating equipment set on first flow type uranium bed is
600~700 DEG C；The heating-up temperature of the electric heating equipment set on second flow type uranium bed is set to 150 DEG C when storing tritium, releases
400~500 DEG C are set to when putting tritium；The temperature setting of the electric heating equipment set on storage tritium uranium bed is 150~255 DEG C.
3. a kind of tritium gas purification system according to claim 1, it is characterised in that the first flow type uranium bed, second
Uranium powder is filled with flow type uranium bed and storage tritium uranium bed.
4. a kind of tritium gas purification system according to claim 1, it is characterised in that the tritium gas, which is introduced into system, to be provided with
Gas-monitoring pressure gauge is introduced, to indicate the pressure of the tritium gas discharged in storage tritium uranium powder bottle to be purified, when pressure is big more than 1
During air pressure, opening the valve below surge flask makes tritium gas enter surge flask.
5. a kind of tritium gas purification system according to claim 1, it is characterised in that the detritiation uranium powder bottle to be purified, cold
The material of trap, surge flask and pipeline is stainless steel；Wherein pipeline is the stainless steel pipes that inner surface is polished.
6. a kind of tritium gas purification system according to claim 1, it is characterised in that the first flow type uranium bed, the second circulation
Formula uranium bed and storage tritium uranium bed are the uranium bed for advancing with Hydrogen activation, and the upper end of three uranium beds is sealed.
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| CN105347305B true CN105347305B (en) | 2017-09-12 |
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| CN106082150A (en) * | 2016-06-02 | 2016-11-09 | 中国工程物理研究院材料研究所 | One is used for preparing high-purity3the device of He and preparation high-purity3the method of He |
| CN106782733B (en) * | 2016-12-30 | 2018-04-13 | 中国工程物理研究院材料研究所 | One kind storage tritium uranium bed deactivating process for the treatment of |
| CN109663456B (en) * | 2019-01-09 | 2021-07-13 | 中国工程物理研究院材料研究所 | Method and system for enriching trace heavy nuclear hydrogen isotopes in hydrogen isotopes by hydrogen replacement adsorption method |
| CN110095575A (en) * | 2019-05-08 | 2019-08-06 | 中国科学技术大学 | The enriching and purifying equipment of pure gas in mixed gas |
| CN112331366B (en) * | 2020-11-21 | 2022-12-13 | 中国工程物理研究院材料研究所 | Deuterium-tritium fuel storage and supply demonstration system and application |
| CN114252317A (en) * | 2021-12-24 | 2022-03-29 | 中国原子能科学研究院 | Carbon-14 radiolabelling systems and methods |
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| JPS5381899A (en) * | 1976-12-27 | 1978-07-19 | Power Reactor & Nuclear Fuel Dev Corp | Manufacturing method of tritium |
| CN104485146B (en) * | 2014-12-12 | 2017-07-28 | 中国工程物理研究院材料研究所 | A kind of detritiation method of heavy duty detergent detritiation purifier |
| CN205204816U (en) * | 2015-11-19 | 2016-05-04 | 中国原子能科学研究院 | Tritium gas purification system |
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