CN113390012B - Supply equipment and method for deuterium-tritium mixed gas - Google Patents

Supply equipment and method for deuterium-tritium mixed gas Download PDF

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CN113390012B
CN113390012B CN202110646251.7A CN202110646251A CN113390012B CN 113390012 B CN113390012 B CN 113390012B CN 202110646251 A CN202110646251 A CN 202110646251A CN 113390012 B CN113390012 B CN 113390012B
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deuterium
tritium
pneumatic valve
gas
standard container
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CN113390012A (en
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王伟伟
李海容
毛义武
陈绍华
张凯奋
夏立东
张伟光
周晓松
龙兴贵
彭述明
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Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics
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Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C11/00—Use of gas-solvents or gas-sorbents in vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0388—Localisation of heat exchange separate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0439—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/07—Actions triggered by measured parameters
    • F17C2250/072—Action when predefined value is reached
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The invention discloses a supply device and a supply method of deuterium-tritium mixed gas, wherein the device comprises a gas source bed, a heating and cooling integrated machine, a standard container, a hydrogen isotope online micro-chromatography and a vacuum unit; the air source bed is connected with the heating and cooling integrated machine through a heat conduction oil pipeline; the air source bed is connected with the standard container through a pneumatic valve II and a pneumatic valve V; the standard container is connected with the hydrogen isotope on-line micro-chromatography through a sample introduction pipeline; the standard container and the vacuum unit are connected through a pneumatic valve II and a pneumatic valve VIII. The device adopts specific combination modes of an air source bed, a heating and cooling integrated machine, on-line micro-chromatography and the like, and realizes that the deuterium/tritium ratio is not changed in the supply process. The supply method comprises the following steps: the temperature of the gas source bed is reduced and kept constant, the deuterium and tritium mixed feed gas is input, the temperature of the gas source bed is increased and kept constant, and the deuterium and tritium mixed gas is output. The method accurately controls the temperature of the gas source bed, and utilizes the on-line micro-chromatography to monitor the deuterium/tritium ratio of the mixed gas, thereby realizing the zero isotope effect in the gas supply process of the gas source bed.

Description

Supply equipment and method for deuterium-tritium mixed gas
Technical Field
The invention belongs to the field of energy, and particularly relates to a supply device and a supply method of a deuterium-tritium mixed gas.
Background
Tritium is an important strategic energy resource and has important significance in the fields of industry, national defense, scientific research and the like. To ensure the research work of International Thermonuclear fusion Reactor (ITER), a suitable deuterium-tritium storage and supply device is required.
Existing deuterium-tritium mixed gas storage and supply equipment (e.g., s. beloglazolv, m. glugla, r. wagner, E).
Figure BDA0003109221490000011
Gr ü nhagen, interrogation of isotope effects in the gas streams supplied by a 1: 1 article storage bed using a micro gas chromatography, Fusion Sci. Technol.48(1) (2005)67-70.), using ZrCo alloys as the hydrogen storage material for the storage and supply apparatus. When the output of the protium and deuterium mixed gas of the ZrCo bed is analyzed on line by using a micro-chromatograph, a more remarkable hydrogen isotope effect is found, which shows that the deuterium/tritium ratio can change along with the supply time when the ZrCo bed is used for deuterium and tritium supply, and certain influence is caused on the fusion reaction stability.
Disclosure of Invention
In order to overcome the technical defects, the invention aims to provide a device and a method for supplying a deuterium-tritium mixed gas under the condition of not changing the proportion of deuterium and tritium. The invention specifically adopts the following technical scheme:
the supply equipment of the deuterium-tritium mixed gas is characterized by comprising a gas source bed, a heating and cooling integrated machine, a standard container, a hydrogen isotope online micro-chromatography and a vacuum unit; the connection relationship is that the air source bed is connected with the heating and cooling integrated machine through a heat conduction oil pipeline; the air source bed is connected with the standard container through a pneumatic valve II and a pneumatic valve V; the standard container is connected with the hydrogen isotope on-line micro-chromatography through a sample introduction pipeline; the standard container and the vacuum unit are connected through a pneumatic valve II and a pneumatic valve VIII.
The gas source bed is a metal hydride chemical bed, and the component of the filling material is LaNi 5 -SiO 2 A composite material.
The LaNi 5 -SiO 2 The particle size of the composite material is 40-60 meshes, LaNi 5 Powder passing through SiO 2 Cladding, LaNi 5 The powder size is 200-250 mesh.
The working temperature range of the heating and cooling integrated machine is 100 ℃ to-20 ℃, and the working speed range is 8 ℃/min to 12 ℃/min.
The invention also provides a deuterium-tritium mixed gas supply method based on the deuterium-tritium mixed gas supply device, which comprises the following steps (all valves are in closed states before the method is executed):
(a) cooling and keeping constant temperature of the air source bed: reducing the temperature of the air source bed from room temperature to a first preset temperature by using a heating and cooling integrated machine, and keeping the temperature constant within a certain time T1;
(b) inputting a deuterium-tritium mixed raw material gas: starting a pneumatic valve I and a pneumatic valve II, inputting a mixed raw material gas with the deuterium-tritium ratio of m: n into a standard container through an external pipeline of the supply device, and after the pressure of the standard container is increased to a first preset pressure, closing the pneumatic valve I and the pneumatic valve II, and testing the initial concentration of the deuterium-tritium mixed raw material gas in the standard container by using hydrogen isotope micro-chromatography; opening a pneumatic valve V, absorbing the deuterium-tritium mixed raw material gas by an air source bed, adjusting the temperature of the heating and cooling integrated machine after the pressure of the standard container is reduced to a second preset pressure, testing the deuterium-tritium ratio of the residual deuterium-tritium mixed raw material gas in the standard container by utilizing hydrogen isotope micro-chromatography until the deuterium-tritium ratio of the residual gas in the standard container is restored to m: n, and closing the pneumatic valve V;
(c) heating and keeping constant temperature of an air source bed: heating the air source bed from a first preset temperature to a second preset temperature by using the heating and cooling integrated machine, and keeping the constant temperature for a certain time T2;
(d) output of deuterium-tritium mixed gas: starting a pneumatic valve V and a pneumatic valve II, releasing a deuterium-tritium mixed feed gas from an air source bed, adjusting the temperature of the heating and cooling integrated machine after the pressure of a standard container is raised to a third preset pressure, and testing the deuterium-tritium ratio of the output gas by using hydrogen isotope micro-chromatography until the deuterium-tritium ratio of the output gas is restored to m: n; and closing the pneumatic valve V, opening the pneumatic valve I to output the deuterium-tritium raw material mixed gas, and closing the pneumatic valve I after the pressure of the standard container is reduced to a fourth preset pressure.
Further, the first preset temperature is-15 ℃ to-10 ℃; the second preset temperature is 5-10 ℃.
Further, the first preset pressure is 70-75 kPa; the second preset pressure is 40-45 kPa; the third preset pressure is 70-75 kPa; the fourth preset pressure is 10-15 kPa.
Further, the first preset time is 10-15 min; the second preset time is 10-15 min.
The system adopts a specific combination mode of an air source bed, a heating and cooling integrated machine, on-line micro-chromatography and the like, and realizes that the deuterium/tritium ratio of the deuterium-tritium mixed gas is not changed in the supply process. The invention accurately controls the temperature of the gas source bed, and realizes the zero isotope effect of the gas source bed in the gas supply process. The supply method of the deuterium-tritium mixed gas changes the adsorption and desorption functions of the gas source bed by using a temperature rise and drop-constant temperature strategy, and monitors the deuterium/tritium ratio of the supplied deuterium-tritium mixed gas by using an online micro-chromatograph.
Drawings
FIG. 1 is a diagram illustrating an apparatus for supplying a deuterium-tritium mixture according to the present invention;
in the figure 1, a pneumatic valve I2, a pneumatic valve II 5, a pneumatic valve V8, a pneumatic valve VIII 3, a standard container 4, a hydrogen isotope on-line micro-chromatograph 6, an air source bed 7, a heating and cooling integrated machine 9 and a vacuum unit are adopted.
Detailed Description
The invention is further explained below with reference to examples and figures.
The supply equipment of the deuterium-tritium mixed gas is characterized by comprising a gas source bed 6, a heating and cooling integrated machine 7, a standard container 3, a hydrogen isotope online micro-chromatography 4 and a vacuum unit 9; the connection relationship is that the air source bed 6 is connected with the heating and cooling integrated machine 7 through a heat conduction oil pipeline; the air source bed 6 is connected with the standard container 3 through a pneumatic valve II2 and a pneumatic valve V5; the standard container 3 is connected with the hydrogen isotope on-line micro-chromatograph 4 through a sample introduction pipeline; the standard container 3 and the vacuum unit 9 are connected through a pneumatic valve 112 and a pneumatic valve VIII 8.
The gas source bed 6 is a metal hydride chemical bed, and the component of the filling material is LaNi 5 -SiO 2 A composite material.
The LaNi 5 -SiO 2 The particle size of the composite material is 40-60 meshes, LaNi 5 Powder passing through SiO 2 Cladding, LaNi 5 The powder size is 200-250 mesh.
The working temperature range of the heating and cooling integrated machine 7 is 100 ℃ to-20 ℃, and the working speed range is 8 ℃/min to 12 ℃/min.
The invention also provides a deuterium-tritium mixed gas supply method based on the deuterium-tritium mixed gas supply device, which comprises the following steps (all valves are in closed states before the method is executed):
(a) the air source bed 6 is cooled and kept at a constant temperature: the air source bed 6 is cooled from the room temperature to a first preset temperature by the heating and cooling integrated machine 7, and the constant temperature is kept for a certain time T1;
(b) inputting a deuterium-tritium mixed feed gas: starting a pneumatic valve I1 and a pneumatic valve II2, inputting mixed raw material gas with the deuterium-tritium ratio of m: n into a standard container through an external pipeline of the supply device, after the pressure of the standard container rises to a first preset pressure, closing the pneumatic valve I1, the pneumatic valve II2, and testing the initial concentration of the deuterium-tritium mixed raw material gas in the standard container by using a hydrogen isotope micro-chromatography 4; opening a pneumatic valve V5, after the pressure of the standard container is reduced to a second preset pressure, adjusting the temperature of the heating and cooling integrated machine 7, testing the ratio of the residual deuterium and tritium mixed raw material gas deuterium and tritium in the standard container by using a hydrogen isotope micro-chromatograph 4 until the ratio of the residual deuterium and tritium in the standard container is restored to m: n, and closing a pneumatic valve V5;
(c) the gas source bed 6 is heated and kept at a constant temperature: the heating and cooling integrated machine 7 is utilized to raise the temperature of the air source bed 6 from a first preset temperature to a second preset temperature, and the constant temperature is kept for a certain time T2;
(d) output of deuterium-tritium mixed gas: starting a pneumatic valve V5 and a pneumatic valve II2, after the pressure of the standard container is raised to a third preset pressure, adjusting the temperature of the heating and cooling integrated machine 7, and testing the deuterium-tritium ratio of the output gas by using a hydrogen isotope micro-chromatograph 4 until the deuterium-tritium ratio of the output gas reaches m: n; the pneumatic valve V5 is closed, the pneumatic valve I1 is opened to output the deuterium-tritium mixed gas, and the pneumatic valve I1 is closed after the pressure of the standard container is reduced to a fourth preset pressure.
Further, the first preset temperature is-15 ℃ to-10 ℃; the second preset temperature is 5-10 ℃.
Further, the first preset pressure is 70-75 kPa; the second preset pressure is 40-45 kPa; the third preset pressure is 70-75 kPa; the fourth preset pressure is 10-15 kPa.
Further, the first preset time is 10-15 min; the second preset time is 10-15 min.
Example 1
In this embodiment, the supply device includes an air source bed 6, a heating and cooling integrated machine 7, a standard container 3, a hydrogen isotope on-line micro-chromatography 4, and a vacuum unit 9. The connection relationship is that the air source bed 6 is connected with the heating and cooling integrated machine 7 through a heat conduction oil pipeline; the air source bed 6 is connected with the standard container 3 through a pneumatic valve II2 and a pneumatic valve V5; the standard container 3 is connected with the hydrogen isotope on-line micro-chromatograph 4 through a sample introduction pipeline; the standard container 3 and the vacuum unit 9 are connected through a pneumatic valve II2 and a pneumatic valve VIII 8.
The gas source bed 6 is a metal hydride chemical bed, and the filling material component is LaNi 5 -SiO 2 A composite material. Wherein, LaNi 5 -SiO 2 The particle size of the composite material is 40-60 meshes, LaNi 5 Powder passing through SiO 2 Cladding, LaNi 5 Powder is bigThe size is 200-250 meshes. The working temperature range of the heating and cooling integrated machine 7 is 100 ℃ to-20 ℃, and the working speed range is 8 ℃/min to 12 ℃/min.
In this embodiment, the method for supplying the deuterium-tritium mixture includes the following steps (all valves are in a closed state before the method is performed):
(a) the air source bed 6 is cooled and kept at a constant temperature: the air source bed 6 is cooled to-10 ℃ from room temperature by the heating and cooling integrated machine 7, and is kept at the constant temperature for 10min
(b) Inputting a deuterium-tritium mixed feed gas: opening a pneumatic valve I1 and a pneumatic valve II2, inputting mixed raw material gas with the deuterium-tritium ratio of 1: 1 into a standard container through an external pipeline of the supply device, after the pressure of the standard container rises to 75kPa, closing the pneumatic valve I1 and the pneumatic valve II2, and measuring the initial deuterium-tritium ratio of the deuterium-tritium mixed raw material gas in the standard container to be 1: 1 within 10 minutes by using a hydrogen isotope micro-chromatograph 4; opening a pneumatic valve V5, after the pressure of the standard container is reduced to 40kPa, measuring the ratio of the residual deuterium and tritium in the mixed gas of deuterium and tritium in the standard container within 10 minutes by a hydrogen isotope micro-chromatograph 4, and closing a pneumatic valve V5 after the ratio of the deuterium and tritium in the mixed gas of deuterium and tritium in the standard container is adjusted to be 1: 1 by the hydrogen isotope micro-chromatograph 4 after the test temperature is adjusted;
(c) the gas source bed 6 is heated and kept at a constant temperature: heating the air source bed 6 from-10 ℃ to 10 ℃ by using the heating and cooling integrated machine 7, and keeping the temperature for 10 min;
(d) output of deuterium-tritium mixed gas: starting a pneumatic valve V5, a pneumatic valve II2, after the pressure of a standard container is raised to 70kPa, closing a pneumatic valve V5, a pneumatic valve II2 and a hydrogen isotope micro-chromatograph 4, wherein the ratio of output gas deuterium to tritium is 11: 10 measured in 10 minutes, reducing the temperature of the heating and cooling integrated machine 7 from 10 ℃ to 9 ℃, and after the ratio of deuterium to tritium adjusted by the test temperature of the hydrogen isotope micro-chromatograph 4 reaches 1: 1, closing the pneumatic valve V5; the pneumatic valve I1 is opened to output the deuterium-tritium mixed gas, and the pneumatic valve I1 is closed when the pressure of the standard container is reduced to 15 kPa.
According to the research condition of adsorption isotherm, LaNi absorbs deuterium tritium gas 5 -SiO 2 The zero isotope effect appears at about-10 ℃, and LaNi is used for desorbing deuterium tritium gas 5 -SiO 2 The zero isotope effect appears around 10 ℃. Compared with the desorption temperature (100-400 ℃) of ZrCo, the preparation methodThe use temperature of the device is low (-10 ℃), so that the permeation loss of tritium at high temperature can be effectively reduced, and the safety protection pressure of tritium is relieved.
The invention utilizes LaNi 5 -SiO 2 The composite material adsorbs-desorbs the deuterium-tritium mixed gas, and LaNi is used for adsorbing-desorbing the deuterium-tritium mixed gas 5 The zero-hydrogen isotope effect is shown, so that the deuterium/tritium ratio cannot be changed along with the supply time, and the defect that the deuterium-tritium ratio fluctuates in the process of supplying the deuterium-tritium mixed gas is overcome. Hydrogen-absorbed pulverized LaNi 5 Through SiO 2 The LaNi is prepared after the coating by a sol-gel method 5 -SiO 2 The composite material avoids agglomeration and air resistance increase, and is favorable for maintaining the stability of the performance of the quick hydrogen absorption-desorption isotope.

Claims (8)

1. The supply equipment of the deuterium-tritium mixed gas is characterized by comprising a gas source bed (6), a heating and cooling integrated machine (7), a standard container (3), a hydrogen isotope online micro-chromatography (4) and a vacuum unit (9); the air source bed (6) is connected with the heating and cooling integrated machine (7) through a heat conduction oil pipeline; the air source bed (6) is connected with the standard container (3) through a pneumatic valve II (2) and a pneumatic valve V (5); the standard container (3) is connected with the hydrogen isotope on-line micro-chromatograph (4) through a sample introduction pipeline; the standard container (3) is connected with the vacuum unit (9) through a pneumatic valve II (2) and a pneumatic valve VIII (8); the standard container (3) is communicated with an external pipeline through a pneumatic valve II (2) and a pneumatic valve I (1).
2. The supply equipment of deuterium-tritium mixture gas as recited in claim 1, characterized in that the gas source bed (6) is a metal hydride chemical bed, and the packing material composition is LaNi5-SiO2 composite material.
3. The apparatus of claim 2, wherein the LaNi5-SiO2 composite material has a particle size of 40-60 mesh, the LaNi5 powder is coated with SiO2, and the LaNi5 powder has a size of 200-250 mesh.
4. The supply equipment of deuterium-tritium mixture gas as recited in claim 1, characterized in that the heating and cooling integrated machine (7) has a working temperature range of 100 ℃ to-20 ℃ and a working rate range of 8 ℃/min to 12 ℃/min.
5. A method of supplying a deuterium-tritium mixture gas based on the apparatus for supplying a deuterium-tritium mixture gas of any one of claims 1 to 4, the method including the steps of:
(a) the air source bed (6) is cooled and kept at a constant temperature: the air source bed (6) is cooled to a first preset temperature from room temperature by using the heating and cooling integrated machine (7), and the constant temperature is kept for a certain time T1;
(b) inputting a deuterium-tritium mixed raw material gas: opening a pneumatic valve I (1), a pneumatic valve II (2), inputting mixed raw material gas with a deuterium-tritium ratio of m: n into a standard container (3) through an external pipeline of the supply device, closing the pneumatic valve I (1), the pneumatic valve II (2) and a hydrogen isotope micro-chromatography (4) after the pressure of the standard container is raised to a first preset pressure, and testing the initial concentration of the deuterium-tritium mixed raw material gas in the standard container; opening a pneumatic valve V (5), a pneumatic valve II (2), absorbing the deuterium-tritium mixed raw material gas by a gas source bed (6), adjusting the temperature of a heating and cooling integrated machine (7) after the pressure of a standard container (3) is reduced to a second preset pressure, testing the deuterium-tritium ratio of the residual deuterium-tritium mixed raw material gas in the standard container by utilizing a hydrogen isotope micro-chromatography (4) until the deuterium-tritium ratio of the residual gas in the standard container is restored to m: n, closing the pneumatic valve V (5), and closing the pneumatic valve II (2);
(c) the gas source bed (6) is heated and kept at a constant temperature: the heating and cooling integrated machine (7) is used for heating the air source bed (6) from a first preset temperature to a second preset temperature, and the constant temperature is kept in a certain time T2;
(d) output of deuterium-tritium mixed gas: starting a pneumatic valve V (5), a pneumatic valve II (2), a gas source bed (6) to release the mixed raw material gas of deuterium and tritium, adjusting the temperature of a heating and cooling integrated machine (7) after the pressure of a standard container is raised to a third preset pressure, and testing the proportion of deuterium and tritium of output gas by using a hydrogen isotope micro-chromatograph (4) until the proportion of deuterium and tritium of the output gas is restored to m: n; and (3) closing the pneumatic valve V (5), opening the pneumatic valve I (1) to output the deuterium-tritium raw material mixed gas, and closing the pneumatic valve I (1) after the pressure of the standard container is reduced to a fourth preset pressure.
6. The method of claim 5, wherein the deuterium-tritium mixture is supplied by: the first preset temperature is-15 ℃ to-10 ℃; the second preset temperature is 5-10 ℃.
7. The method of claim 5, wherein the deuterium-tritium mixture is supplied by: the first preset pressure is 70-75 kPa; the second preset pressure is 40-45 kPa; the third preset pressure is 70-75 kPa; the fourth preset pressure is 10-15 kPa.
8. The method of claim 5, wherein the deuterium-tritium mixture is supplied by: the certain time T1 is 10-15 min; the certain time T2 is 10-15 min.
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