CN109036610B - Device and method for removing polymorphic tritium in tail gas of molten salt reactor - Google Patents
Device and method for removing polymorphic tritium in tail gas of molten salt reactor Download PDFInfo
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Abstract
The invention relates to a removing device for polymorphic tritium in tail gas of a molten salt reactor, which comprises an equipment group for removing the polymorphic tritium, wherein the equipment group comprises a fluoride adsorption bed group for adsorbing tritium fluoride in the tail gas of the molten salt reactor to discharge first tail gas; the reduction bed group is used for reducing the oxidation atmosphere in the first tail gas and reducing tritium in different forms into gaseous tritium so as to discharge a second tail gas; an alloy tritium storage group used for adsorbing tritium in the second tail gas and storing most of tritium in a metal hydride form so as to discharge a third tail gas; the catalytic oxidation bed group is used for oxidizing residual tritium in the third tail gas to form tritium water so as to discharge a fourth tail gas; a tritium-water adsorption bed group for adsorbing tritium water in the fourth tail gas to discharge a final product; and a gas circulating pump for providing power to form a gas circulating system. The invention also provides a method for removing polymorphic tritium in the tail gas of the molten salt reactor. The device and the method effectively solve the problem of removing tritium with different forms in the tail gas environment of the molten salt reactor.
Description
Technical Field
The invention belongs to the technical field of nuclear waste treatment, and particularly relates to a device and a method for removing polymorphic tritium in tail gas of a molten salt reactor.
Background
Tritium is the smallest radioactive nuclide in nature, the decay mode is β decay, the half-life period is 12.33 years, the detention time of tritium in the atmospheric and water body transmission process is long, the generated radioactive influence is not limited to the vicinity of the emission region, but can be distributed to the global range, tritium is a radioactive nuclide with a weak β radiator, and can not generate external irradiation damage to human bodies, however, because of the long decay period and the high isotope exchange rate and oxidation rate, the radioactive nuclide can cause internal irradiation damage to tissues and organs after being inhaled by the human bodies, and therefore the emission of tritium in the environment needs to be controlled.
Tritium is one of key nuclides which affect the environment in the normal operation state of a nuclear power plant, and in order to reduce the discharge of tritium to the environment, the recovery and removal of tritium become necessary preconditions.
Tritium generated in the molten salt reactor is carried out through inert gas mainly in a primary loop pipeline. In order to meet the requirements of tritium treatment, recovery and removal of a molten salt reactor, a polymorphic tritium removal device and a polymorphic tritium removal method under the condition of tail gas of the molten salt reactor need to be provided.
Disclosure of Invention
In order to solve the problem of removing polymorphic tritium in the tail gas of the molten salt reactor, the invention provides a device and a method for removing polymorphic tritium in the tail gas of the molten salt reactor.
The invention provides a removing device for polymorphic tritium in tail gas of a molten salt reactor, which comprises a tail gas inlet, an exhaust port and an equipment group positioned between the tail gas inlet and the exhaust port and used for removing the polymorphic tritium, wherein the equipment group comprises a fluoride adsorption bed group used for adsorbing tritium fluoride in the tail gas of the molten salt reactor so as to exhaust first tail gas; the reduction bed group is used for reducing the oxidation atmosphere in the first tail gas and reducing tritium in different forms into gaseous tritium so as to discharge a second tail gas; an alloy tritium storage group used for adsorbing tritium in the second tail gas and storing most of tritium in a metal hydride form so as to discharge a third tail gas; the catalytic oxidation bed group is used for oxidizing residual tritium in the third tail gas to form tritium water so as to discharge a fourth tail gas; a tritium-water adsorption bed group for adsorbing tritium water in the fourth tail gas to discharge a final product; and the gas circulating pump provides power for the fluoride adsorption bed group, the reduction bed group, the alloy tritium storage group, the catalytic oxidation bed group and the tritium water adsorption bed group and forms a gas circulating system with the fluoride adsorption bed group, the reduction bed group, the alloy tritium storage group, the catalytic oxidation bed group and the tritium water adsorption bed group.
Thus, the tail gas of the molten salt reactor is introduced into the removing device from the tail gas inlet, tritium fluoride in the tail gas of the molten salt reactor is removed through the fluoride adsorption bed, and a first gas is discharged; then, the first gas enters a reduction bed, the oxidation atmosphere in the first tail gas is removed, meanwhile, water tritium and methane tritium are converted into gaseous tritium, and a second tail gas is discharged; then, introducing the second tail gas into an alloy tritium storage bed, and storing most tritium in a metal hydride form to discharge a third tail gas; then, introducing the third tail gas into a catalytic oxidation bed, oxidizing residual tritium in the atmosphere into tritium water, and discharging fourth tail gas; then the fourth tail gas enters a tritium water adsorption bed to adsorb and remove tritium water in the fourth tail gas, so that the treatment efficiency of tritium is further improved, and the aims of recovering and removing polymorphic tritium are fulfilled.
Preferably, the fluoride adsorption bed group, the reduction bed group, the alloy tritium storage group, the catalytic oxidation bed group and the tritium water adsorption bed group comprise common equipment and standby equipment which are connected in parallel; all the common devices are sequentially connected in series to form a passage between a tail gas inlet and an exhaust port; the standby equipment is connected with a gas circulation pump to form the gas circulation system.
Preferably, the standby equipment of the fluoride adsorption bed group is connected with a gas circulating pump through a first check valve and a second check valve to form a first gas circulating system, the standby equipment of the reduction bed group and the alloy tritium storage bed group is connected with the gas circulating pump through a third check valve and a fourth check valve to form a second gas circulating system, and the standby equipment of the catalytic oxidation bed group and the tritium water adsorption bed group is connected with the gas circulating pump through a fifth check valve and a sixth check valve to form a third gas circulating system.
Preferably, the gas circulation system comprises a pressure monitoring device and a polymorphic tritium monitoring device for monitoring the treatment efficiency and stability of the fluoride adsorption bed group, the reduction bed group, the alloy tritium storage group, the catalytic oxidation bed group and the tritium water adsorption bed group.
Preferably, the adsorbent filled in the fluoride adsorption bed group is alumina or activated carbon.
Preferably, the reducing agent filled in the reducing bed group is a Zr-based alloy, a Mg-based alloy, or an Al-based alloy. The reduction bed set is provided with a first heating device for heating the reducing agent to the operating temperature.
Preferably, the tritium storage alloy filled in the alloy tritium storage bed group is Zr2Fe alloy, sponge Ti or sponge Zr. The alloy tritium storage bed group is provided with a second heating device and is used for heating the tritium storage alloy to the running temperature.
Preferably, the catalytic oxidant filled in the catalytic oxidation bed group is copper oxide particles or noble metal Pt. The catalytic oxidation bed group is provided with a third heating device for heating the catalytic oxidation agent to the operating temperature
Preferably, the adsorbent filled in the tritium-water adsorption bed is a molecular sieve.
The invention also provides a method for removing polymorphic tritium in the tail gas of the molten salt reactor by using the removing device.
In a word, the device and the method for removing the polymorphic tritium from the tail gas of the molten salt reactor effectively solve the problems of treatment, recovery and removal of tritium in different forms in the tail gas environment of the molten salt reactor.
Drawings
FIG. 1 is a schematic diagram of a polymorphic tritium removal apparatus provided in accordance with a preferred embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described in detail below with reference to specific embodiments thereof, but the following examples are only for understanding the present invention and do not limit the present invention, the examples of the present invention and features thereof may be combined with each other, and the present invention may be implemented in various different ways as defined and covered by the claims.
The device for removing polymorphic tritium in tail gas of the molten salt reactor comprises a tail gas inlet 1, a booster pump 2, a buffer tank group 3, a device group 4 for removing polymorphic tritium fluoride and an exhaust port 5, wherein the tail gas of the molten salt reactor enters the removing device through the tail gas inlet 1, passes through the booster pump 2, the buffer tank group 3 and the device group 4 and then is discharged from the removing device through the exhaust port 5. The tail gas of the molten salt reactor comprises tritium fluoride and HTO and CH with different forms3And T. In this embodiment, the apparatus set 4 includes a fluoride adsorbent bed set 41, a fluoride adsorbent bed set, and a fluoride adsorbent bed set,A reduction bed group 42, an alloy tritium storage group 43, a catalytic oxidation bed group 44 and a tritium water adsorption bed group 45. In addition, the equipment group 4 further includes a gas circulation pump 46, the gas circulation pump 46 is a diaphragm compressor, and provides power for the fluoride adsorption bed group 41, the reduction bed group 42, the alloy tritium storage group 43, the catalytic oxidation bed group 44, and the tritium water adsorption bed group 45, and forms a gas circulation system with the fluoride adsorption bed group 41, the reduction bed group 42, the alloy tritium storage group 43, the catalytic oxidation bed group 44, and the tritium water adsorption bed group 45 when necessary.
The fluoride adsorption bed group 41 is used for adsorbing and removing tritium fluoride in the tail gas of the molten salt reactor and discharging the first tail gas. The adsorbent packed by the fluoride adsorbent bed group 41 in this embodiment is alumina, it being understood that the adsorbent may also be activated carbon.
The fluoride adsorption bed group 41 further includes a first fluoride adsorption bed 411 as a common facility and a second fluoride adsorption bed 412 as a spare facility connected in parallel; wherein, the inlet and outlet of the first fluoride adsorption bed 411 are respectively provided with a first valve V11 and a second valve V12, and the inlet and outlet of the second fluoride adsorption bed 412 are respectively provided with a third valve V11 'and a fourth valve V12'. The inlet and outlet of the fluoride adsorption bed group 41 are also respectively provided with a fifth valve V11 'and a sixth valve V12' to connect with the gas circulation pump 46, and the fifth valve V11 'and the sixth valve V12' are respectively a first check valve and a second check valve to prevent gas from flowing backwards. So that the second fluoride adsorption bed 412 can constitute a first gas circulation system with the gas circulation pump 46. Under normal operating conditions, the first valve V11 and the second valve V12 are opened, and the third valve V11', the fourth valve V12', the fifth valve V11", and the sixth valve V12" are closed, so that the molten salt stack tail gas enters the first fluoride-adsorbing bed 411 and then passes to the downstream reducing bed group 42.
In addition, a pressure monitoring device 6 and a polymorphic tritium monitoring device 7 are arranged at the outlet of the fluoride adsorption bed group 41 to monitor the treatment efficiency and stability of the fluoride adsorption bed group 41.
When the pressure monitoring device 6 and the polymorphic tritium monitoring device 7 show that the first fluoride adsorption bed 411 has low adsorption or catalytic efficiency or is invalid, the standby state is started, namely the first valve V11 and the second valve V12 are closed, and the third valve V11', the fourth valve V12', the fifth valve V11 'and the sixth valve V12' are opened, so that the tail gas of the molten salt reactor enters the first gas circulation system. And the gas is led to the downstream reduction bed group 42 only after the pressure monitoring equipment 6 and the polymorphic tritium monitoring equipment 7 display that the treatment effect of the detected gas meets the requirement again.
The reduction bed group 42 is used to remove the oxidizing atmosphere in the first off-gas, while tritium (HTO and CH) is present in different forms3T) after being converted into gaseous tritium, discharging a second tail gas through a gas circuit; in the present embodiment, the reducing agent filled in the reduction bed group 42 is a Zr-based alloy (for example, a zrnnfe alloy). It is to be understood that Mg-based alloys or Al-based alloys may also be filled. The reduction bed unit 42 includes a first heating device to heat the reduction bed unit 42 to a temperature required for the operation of the reducing agent.
The reducing bed group 42 is similar to the fluoride adsorbing bed group 41, and includes a first reducing bed 421 as a common facility and a second reducing bed 422 as a spare facility in parallel; wherein, the inlet and outlet of the first reducing bed 421 are respectively provided with a seventh valve V21 and an eighth valve V22, and the inlet and outlet of the second reducing bed 422 are respectively provided with a ninth valve V21 'and a tenth valve V22'. The inlet of the reduction bed group 42 is also provided with a fifteenth valve V21' connected with the gas circulation pump 46. The fifteenth valve V21 "is a third check valve to prevent gas backflow.
The alloy tritium storage group 43 is used for adsorbing and storing residual tritium in the second tail gas, most tritium is stored in a metal hydride form, toxicity generated by processing tritium into tritium water is avoided, and the third tail gas is discharged. In the implementation, the tritium storage alloy filled in the alloy tritium storage bed group is Zr2An Fe alloy. It should be understood that the filler may also be sponge Ti or sponge Zr. The alloy tritium storage group 43 comprises a second heating device to heat the alloy tritium storage group 43 to the temperature required by the operation of the filler.
The alloy tritium storage group 43 is similar to the fluoride adsorption bed group 41 and comprises a first alloy tritium storage device 431 serving as common equipment and a second alloy tritium storage device 432 serving as standby equipment which are connected in parallel; wherein, the inlet and outlet of the first alloy tritium storage 431 are respectively provided with an eleventh valve V31 and a twelfth valve V32, and the inlet and outlet of the second alloy tritium storage 432 are respectively provided with a thirteenth valve V31 'and a fourteenth valve V32'. The outlet of the alloy tritium storage group 43 is also provided with a sixteenth valve V22' connected with the gas circulation pump 46. The sixteenth valve V22 "is a fourth check valve for preventing reverse flow of gas.
Through the fifteenth valve V21 ″ and the sixteenth valve V22 ″, the second reduction bed 422, the second alloy tritium storage 432, and the gas circulation pump 46 may constitute a second gas circulation system.
In a normal state, the seventh valve V21, the eighth valve V22, the eleventh valve V31, and the twelfth valve V32 are opened, and the ninth valve V21', the tenth valve V22', the thirteenth valve V31', the fourteenth valve V32', the fifteenth valve V21", and the sixteenth valve V22" are closed, so that the first exhaust gas enters the first reduction bed 421 to make different forms of tritium (HTO and CH) in the first exhaust gas3T) is converted into gaseous tritium to form a second tail gas, the second tail gas is led to the first alloy tritium storage device 431, the residual tritium is adsorbed and stored, most tritium is stored in the form of metal hydride to form a third tail gas, and then the third tail gas is led to the downstream catalytic oxidation bed group 44.
Pressure monitoring equipment 6 and polymorphic tritium monitoring equipment 7 are arranged at the outlets of the reduction bed group 42 and the alloy tritium storage group 43 so as to monitor the treatment efficiency and stability of the reduction bed group 42 and the alloy tritium storage group 43.
When the pressure monitoring device 6 and the polymorphic tritium monitoring device 7 show that the first reduction bed 421 or the first alloy tritium storage device 431 has low adsorption or catalytic efficiency or is ineffective, the standby state is started, that is, the seventh valve V21, the eighth valve V22, the eleventh valve V31 and the twelfth valve V32 are closed, and the ninth valve V21 'and the tenth valve V22', the thirteenth valve V31 'and the fourteenth valve V32', the fifteenth valve V21 "and the sixteenth valve V22" are opened, so that the first exhaust gas enters the second gas circulation system. And the downstream catalytic oxidation bed group 44 is accessed only when the pressure monitoring equipment 6 and the polymorphic tritium monitoring equipment 7 display that the treatment effect of the detected gas meets the requirement again.
The catalytic oxidation bed set 44 is used for oxidizing the residual tritium in the third tail gas into tritium water to form a fourth tail gas. The catalytic oxidation bed set 44 also serves as a safety device for tritium removal equipment after the alloy tritium storage device fails. The catalytic oxidation bed assembly 44 includes a third heating means to heat the catalytic oxidation bed assembly 44 to a temperature required for operation of the catalytic oxidant and to maintain the temperature steady. In this embodiment, the catalytic oxidation bed assembly 44 is packed with catalytic oxidation agent that is copper oxide particles. It should be understood that the catalytic oxidant may also be a noble metal Pt.
Catalytic oxidation bed train 44 also includes a first catalytic oxidation bed 441 as a conventional means and a second catalytic oxidation bed 442 as a backup means. Wherein, the inlet and outlet of the first catalytic oxidation bed 441 are respectively provided with a seventeenth valve V41 and an eighteenth valve V42, and the inlet and outlet of the second catalytic oxidation bed 432 are respectively provided with a nineteenth valve V41 'and a twentieth valve V42'. The inlet of the catalytic oxidation bed unit 44 is also provided with a twenty-fifth valve V41 "to connect with the gas circulation pump 46.
The tritium water adsorption bed set 45 is used for further adsorbing and removing tritium water formed by the catalytic oxidation bed set 44 to form a final product, so that the treatment efficiency of tail gas is further improved, and the purpose of recovering and removing polymorphic tritium is achieved. In this embodiment, the adsorbent filled in the tritium-water adsorption bed set 45 is a molecular sieve.
The tritium-water adsorption bed group 45 also comprises a first tritium-water adsorption bed 451 as a common device and a second tritium-water adsorption bed 452 as a standby device which are connected in parallel; wherein, the inlet and outlet of the first tritium water adsorption bed 451 are respectively provided with a twenty-first valve V51 and a twenty-second valve V52, and the inlet and outlet of the second tritium water adsorption bed 452 are respectively provided with a twenty-third valve V51 'and a twenty-fourth valve V52'. The outlet of the tritium water adsorption bed group 45 is provided with a twenty-sixth valve V52' which is connected with the gas circulating pump 46.
The twenty-fifth valve V41 ″ and the twenty-sixth valve V52 ″ allow the second catalytic oxidation bed 442, the second tritium-water adsorption bed 452, and the gas circulation pump 46 to constitute a third gas circulation system.
Under a normal state, a seventeenth valve V41, an eighteenth valve V42, a twenty-first valve V51 and a twentieth valve V52 are opened, a nineteenth valve V41', a twentieth valve V42', a twenty-third valve V51', a twenty-fourth valve V52', a twenty-fifth valve V41 'and a twenty-sixth valve V52' are closed, so that the third tail gas enters a catalytic oxidation bed group 44 to oxidize residual tritium in the third tail gas into tritium water to form fourth tail gas, and the fourth tail gas then enters a tritium water adsorption bed group 45 to further adsorb the tritium water and remove the tritium water to form a final product.
Pressure monitoring equipment 6 and polymorphic tritium monitoring equipment 7 are arranged at the outlets of the catalytic oxidation bed group 44 and the tritium-water adsorption bed group 45 so as to monitor the treatment efficiency and stability of the catalytic oxidation bed group 44 and the tritium-water adsorption bed group 45.
When the pressure monitoring device 6 and the polymorphic tritium monitoring device 7 show that the first catalytic oxidation bed 441 or the first tritium-water adsorption bed 451 has low adsorption or catalytic efficiency or is ineffective, the standby state is started, i.e., the seventeenth valve V41, the eighteenth valve V42, the twenty-first valve V51 and the twentieth valve V52 are closed, and the nineteenth valve V41', the twentieth valve V42', the thirteenth valve V51', the twenty-fourth valve V52', the twenty-fifth valve V41 "and the twenty-sixth valve V52" are opened, so that the third exhaust gas enters the third gas circulation system. And only when the pressure monitoring equipment 6 and the polymorphic tritium monitoring equipment 7 display that the treatment effect of the detected gas meets the requirement again, the final product is led to the downstream exhaust port 5.
In addition, the removing device is provided with a first buffer tank 31 behind the booster pump 2, and the outlet of the first buffer tank 31 is provided with an inlet valve V1 and a flow monitoring device which is used for monitoring the tail gas flow of the molten salt reactor at the outlet of the first buffer tank 31; a second buffer tank 32 is arranged at the outlet of the alloy tritium storage group 43; the outlet of the tritium water adsorption bed group 45 is also provided with a third buffer tank 33 to buffer the final product, and an outlet valve V2 is provided at the outlet of the third buffer tank 33 to discharge the final product from the removal device.
The invention also provides a method for removing polymorphic tritium under the condition of the tail gas of the molten salt reactor, which comprises the following steps:
and S1, starting the booster pump 2, introducing high-purity argon from the tail gas inlet 1, so as to clean the whole removing device, starting the first heating device, the second heating device and the third heating device of the reduction bed group 42, the alloy tritium storage bed group 43 and the catalytic oxidation bed group 44 to reach the temperature required by the operation of the equipment group, and keeping the temperature stable.
S2, feeding the molten salt reactor tail gas into a removing device from a tail gas inlet 1 (in this embodiment, the concentrations of tritium fluoride, gaseous tritium, water tritium and methane tritium in the molten salt reactor tail gas are respectively 10ppm), opening an inlet valve V1, a first valve V11, a second valve V12, a seventh valve V21, an eighth valve V22, a thirteenth valve V31, a fourteenth valve V32, a seventeenth valve V41, an eighteenth valve V42, a twenty-first valve V51, a twenty-second valve V52 and an outlet valve V2, and operating a first fluoride adsorption bed 411, a first reduction bed, a first alloy tritium storage device 431, a first catalytic oxidation bed 441 and a first tritium water adsorption bed 451; detecting the removal effect of the removal device on the tail gas of the molten salt reactor through each pressure monitoring device 6 and the polymorphic tritium monitoring device 7; wherein, the treatment efficiency of the first fluoride adsorption bed 411 to tritium fluoride is higher than 90%, the conversion efficiency of the first reduction bed 421 to tritium water and methane tritium is higher than 99%, the adsorption efficiency of the first alloy tritium storage 431 to gaseous tritium is higher than 99.9%, the treatment efficiency of the first catalytic oxidation bed 441 to gaseous tritium is higher than 95%, and the adsorption efficiency of the first tritium adsorption bed 451 to tritium water is higher than 99%.
Therefore, the treatment efficiency of the removing device on polymorphic tritium is higher than 90%, most of water tritium and methane tritium can be adsorbed in a safer solid storage mode, and the final product of the tail gas of the molten salt reactor after tritium is removed by the removing device is discharged from the exhaust port 5.
S3, if the pressure monitoring device 6 and the polymorphic tritium monitoring device 7 show that the operation efficiency of the first fluoride adsorption bed 411 is low, the first valve V11 is closed, the second valve V12 simultaneously opens the third valve V11', the fourth valve V12', the fifth valve V11' and the sixth valve V12', a gas circulation system is adopted, so that the tail gas circulates through the second fluoride adsorption bed 412 and does not flow into the rear-end processing device any more, the rear-end processing effect is prevented from being influenced, when the gas processing effect to be detected meets the requirement again, the seventh valve V21 and the eighth valve V22 are opened, the fifth valve V11' and the sixth valve V12 are closed, and the system device starts to operate normally again.
It should be understood that the first reduction bed 421, the first alloy tritium storage 431, the first catalytic oxidation bed 441 or the first tritium-water adsorption bed 451 can be switched by valves when the efficiency is reduced or fails, so that the system equipment can start to operate normally again.
The above embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and various changes may be made in the above embodiments of the present invention. All simple and equivalent changes and modifications made according to the claims and the content of the specification of the present invention fall within the scope of the claims of the present invention. The invention has not been described in detail in order to avoid obscuring the invention.
Claims (9)
1. The utility model provides a remove device that is arranged in polymorphic tritium of molten salt reactor tail gas, includes tail gas import and gas vent, its characterized in that still includes the equipment group that is used for polymorphic tritium to get rid of that is located between tail gas import and the gas vent, and this equipment group includes:
the fluoride adsorption bed group is used for adsorbing tritium fluoride in the tail gas of the molten salt reactor to discharge a first tail gas;
the reduction bed group is used for reducing the oxidation atmosphere in the first tail gas and reducing tritium in different forms into gaseous tritium so as to discharge a second tail gas;
an alloy tritium storage group used for adsorbing tritium in the second tail gas and storing most of tritium in a metal hydride form so as to discharge a third tail gas;
the catalytic oxidation bed group is used for oxidizing residual tritium in the third tail gas to form tritium water so as to discharge a fourth tail gas;
a tritium-water adsorption bed group for adsorbing tritium water in the fourth tail gas to discharge a final product; and
the gas circulating pump provides power for the fluoride adsorption bed group, the reduction bed group, the alloy tritium storage group, the catalytic oxidation bed group and the tritium water adsorption bed group and forms a gas circulating system with the fluoride adsorption bed group, the reduction bed group, the alloy tritium storage group, the catalytic oxidation bed group and the tritium water adsorption bed group;
wherein the fluoride adsorption bed group, the reduction bed group, the alloy tritium storage group, the catalytic oxidation bed group and the tritium water adsorption bed group comprise common equipment and standby equipment which are connected in parallel; all the common devices are sequentially connected in series to form a passage between a tail gas inlet and an exhaust port; the standby equipment is connected with a gas circulation pump to form the gas circulation system.
2. The removing device according to claim 1, wherein the spare devices of the fluoride adsorption bed group are connected to a gas circulation pump through first and second check valves to form a first gas circulation system, the spare devices of the reduction bed group and the alloy tritium storage bed group are connected to the gas circulation pump through third and fourth check valves to form a second gas circulation system, and the spare devices of the catalytic oxidation bed group and the tritium water adsorption bed group are connected to the gas circulation pump through fifth and sixth check valves to form a third gas circulation system.
3. The abatement apparatus of claim 1, wherein the gas circulation system comprises a pressure monitoring device and a polymorphic tritium monitoring device for monitoring the treatment efficiency and stability of the fluoride adsorption bed group, the reduction bed group, the alloy tritium storage group, the catalytic oxidation bed group, and the tritium water adsorption bed group.
4. The removal device of claim 1, wherein the adsorbent packed by the fluoride adsorbent bed group is alumina or activated carbon.
5. The removing apparatus according to claim 1, wherein the reducing agent filled in the reducing bed group is a Zr-based alloy, a Mg-based alloy, or an Al-based alloy, and the reducing bed group has a first heating means for heating the reducing agent to an operating temperature.
6. The removal device according to claim 1, wherein the tritium storage alloy filled in the alloy tritium storage bed group is Zr2The alloy tritium storage bed group is provided with a second heating device and is used for heating the tritium storage alloy to the running temperature.
7. The removing apparatus according to claim 1, wherein the catalytic oxidation bed set is filled with a catalytic oxidizing agent of copper oxide particles or noble metal Pt, and the catalytic oxidation bed set has a third heating means for heating the catalytic oxidizing agent to an operating temperature.
8. The removal device of claim 1, wherein the adsorbent packed by the tritium-water adsorption bed is a molecular sieve.
9. A method of removing polymorphic tritium from a molten salt stack tail gas using the removal apparatus of any of claims 1 to 8.
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