CN112037958B - High-concentration tritium water treatment device - Google Patents
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- CN112037958B CN112037958B CN202010943964.5A CN202010943964A CN112037958B CN 112037958 B CN112037958 B CN 112037958B CN 202010943964 A CN202010943964 A CN 202010943964A CN 112037958 B CN112037958 B CN 112037958B
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Abstract
The invention discloses a high-concentration tritium water treatment device which comprises a water vapor generation unit, a membrane reaction unit, a hydrogen storage unit and a tail gas treatment unit which are sequentially connected. The first-stage reactor adopts valence-variable oxide load (TiO) 2 ，CeO 2 ，ZrO 2 ) The Pt catalyst changes the reaction course of hydrogen-water isotope exchange from the molecular level and improves the reaction rate(ii) a Charging lithium-based CO in the second stage reactor 2 The adsorbent, removing the product, further promotes chemical equilibrium to the right. The invention realizes the improvement of the chemical reaction rate, the reduction of side reactions, the removal of products to promote the chemical equilibrium movement, the improvement of the tritium removal factor of the tritium water treatment process and the high-efficiency recovery of tritium, and can be applied to fusion devices and other places generating high-concentration tritium water.
Description
Technical Field
The invention belongs to the field of radioactive waste treatment, and particularly relates to a high-concentration tritium water treatment device.
Background
During operation of the fusion device, certain normal operation conditions such as first wall cleaning and certain abnormal working conditions such as air leakage of a combustion chamber or tritium leakage in a glove box can generate a certain amount of high-concentration tritium water. Since high concentration tritium water can generate self-radiation decomposition, explosive HT and O can be formed by decomposition in storage 2 With mixed gases, there is a risk of overpressure and tritium water is generally converted to tritium gas for storage in a safe manner. One of the commonly used methods is based on a palladium membrane reactor, tritium in tritium water is displaced by chemical reaction, tritium gas is obtained through selective separation of the palladium membrane, and the treatment of the tritium water and the tritium recovery are completed.
Two possible chemical reactions are currently disclosed based on palladium membrane reactors, one being the hydrogen isotope exchange reaction: t is 2 O+H 2 →H 2 O+T 2 . The reaction principle is that hydrogen is used for exchanging T in tritium water to obtain T 2 Or HT, using the selective separation characteristics of palladium membranes 2 Transferring to the other side of the palladium film to complete the treatment of tritium water and the recovery of tritium. The other is a water-gas shift reaction: t is 2 O+CO→CO 2 +T 2 The reaction principle is that a certain amount of CO is introduced to displace T of tritiated water, and the T is separated by utilizing the selective separation characteristic of a palladium membrane 2 Transferring to the other side of the palladium film to complete the treatment of tritium water and the recovery of tritium.
The method for treating tritium water by the hydrogen isotope exchange membrane module is limited by chemical thermodynamics, when the gas-liquid ratio is 1: 1, the maximum tritium removal factor is 11, when the gas-liquid ratio is 1: 2, the maximum tritium removal factor is 18, and a part of tritium (9.1% or 5.5%) is still not recovered. The equilibrium constant of the water-vapor transformation reaction is higher, and the maximum tritium removal factor can reach 123.5 when the gas-liquid ratio is 1: 1 based on the membrane module treatment process. However, when high-concentration tritium and CO coexist, a small amount of organic matters containing tritium aldehyde or carboxylic acid and the like can be generated, tritium is solidified by the by-products in a form of a solidified phase, and recovery of tritium is not facilitated, and experiments are not carried out by using high-concentration tritium water in the related researches of the reaction, so that beta decay of tritium is ignored, and when the concentration of tritium is higher, complex radiation reaction can be initiated by the beta decay of tritium. In addition, the catalyst used in such tritiated water treatment process is generally a conventional carrier such as diatomaceous earth, Al 2 O 3 The supported Pt catalyst has lower catalytic performance. In conclusion, the tritium removal factor of the hydrogen isotope exchange reaction is not high, complex radiation side reactions can be generated when the water-gas shift reaction is used for treating high-concentration tritium water, and the performance of the catalyst is low, so that the existing membrane reaction process is not suitable for high-efficiency treatment of the high-concentration tritium water.
Disclosure of Invention
In order to solve the problems, the invention provides a device for treating high-concentration tritium water.
The invention specifically adopts the following technical scheme:
the high-concentration tritium water treatment device comprises a water vapor generation unit, a membrane reaction unit, a hydrogen storage unit and a tail gas treatment unit which are sequentially connected, wherein the water vapor generation unit comprises a gas carrying cylinder, a flow meter I, a tritium water tank, a constant flow pump and a water vapor generator, the gas carrying cylinder is connected with the water vapor generator through the flow meter I, and the tritium water tank is connected with the water vapor generator through the constant flow pump; the membrane reaction unit comprises a primary palladium membrane reactor and a secondary palladium membrane reactor, wherein the primary palladium membrane reactor and the secondary palladium membrane reactor are both provided with catalyst filling areas, a tritium water concentration detection branch is arranged between the two stages of palladium membrane reactors, the permeation side of the primary palladium membrane reactor is provided with a pure hydrogen inlet, the pure hydrogen inlet is connected with a flowmeter II, the raw material side of the secondary palladium membrane reactor is provided with a carbon monoxide inlet, and the carbon monoxide inlet is connected with a flowmeter III; the tail gas end at the raw material side of the primary palladium membrane reactor is connected to the gas inlet end at the raw material side of the secondary palladium membrane reactor through a valve V-4, and the tail gas end at the raw material side of the secondary palladium membrane reactor is connected with a tail gas treatment unit; the permeation sides of the two-stage palladium membrane reactor are both connected with a hydrogen storage unit; the primary palladium membrane reactor is provided with a constant temperature area, and a metal catalyst loaded by a variable valence oxide is filled outside a membrane tube of the constant temperature area; the primary palladium membrane reactor comprises a thermocouple insertion opening I, a pure hydrogen inlet, a hydrogen isotope gas outlet I, a tritium water vapor inlet and a tail gas outlet I, and is filled with a catalyst I; the second-stage palladium membrane reactor comprises a thermocouple insertion opening II, a purge gas inlet, a hydrogen isotope gas outlet II, tritium water vapor, a carbon monoxide gas inlet and a tail gas outlet II, and is filled with a catalyst II and an adsorbent.
Further, the primary palladium membrane reactor is provided with a constant temperature area, and a metal catalyst loaded with a variable valence oxide is filled outside a membrane tube of the constant temperature area of the primary palladium membrane reactor; the secondary palladium membrane reactor is provided with a constant temperature area, and a load type metal catalyst and a CO2 adsorbent are filled outside a membrane tube of the constant temperature area of the secondary palladium membrane reactor.
Further, the valence-variable oxide is TiO 2 、CeO 2 Or ZrO 2 The metal catalyst is any one of Pt, Pd and Ni-based catalysts.
Further, the ratio of the supported metal catalyst to the adsorbent in the secondary palladium membrane reactor is 2: 1-4: 1.
Further, said CO 2 The adsorbent is lithium orthosilicate, and the supported metal catalyst is a Pt-based catalyst supported by alumina or silica.
Further, the tritium water concentration detection branch comprises: a bubbler, a dryer I and an ionization chamber I.
Further, the hydrogen storage unit comprises a first hydrogen storage unit connected with the permeation side of the first-stage palladium membrane reactor and a second hydrogen storage unit connected with the permeation side of the second-stage palladium membrane reactor, wherein the first hydrogen storage unit comprises a buffer tank I, a booster pump I and a hydrogen storage bed I, and the second hydrogen storage unit comprises a buffer tank II, a booster pump II and a hydrogen storage bed II.
Further, the tail gas treatment unit comprises a condenser and a dryer II.
The invention adopts the hydrogen isotope exchange membrane reactor and the water-vapor shift reactor to operate in series, the concentration of tritium water is reduced by one order of magnitude by the first-stage reactor, the radiation chemical side reaction caused by tritium beta decay in the second-stage water-vapor shift reactor is avoided, and the second-stage reactor is used as a device for treating tail gas of the first-stage reactor, so that the tritium removal factor can be further improved.
Meanwhile, the invention adopts variable valence oxide load (TiO) 2 ，CeO 2 ，ZrO 2 ) The Pt catalyst changes the hydrogen water isotope exchange reaction process from the molecular level, and improves the reaction rate; charging the second stage reactor with lithium-based CO 2 The adsorbent, removing the product, further promotes chemical equilibrium to the right.
The invention realizes the improvement of the chemical reaction rate, the reduction of side reactions, the removal of products to promote the chemical equilibrium movement, the improvement of the tritium removal factor of the tritium water treatment process and the high-efficiency recovery of tritium, and can be applied to fusion devices and other places generating high-concentration tritium water.
Drawings
FIG. 1 is a schematic view of a high tritium water treatment apparatus according to the present invention;
FIG. 2 is a schematic catalyst packing diagram for a primary palladium membrane reactor;
FIG. 3 is a schematic catalyst packing diagram for a two-stage palladium membrane reactor;
in the figure, 1, a gas carrying bottle 2, a flow meter I3, a tritium water tank 4, a constant flow pump 5, a water generator 6, a flow meter II 7, a primary palladium membrane reactor 8, a flow meter IV 9, an ionization chamber II 10, a pressure sensor I11, a buffer tank I12, a booster pump I13, a hydrogen storage bed I14, a bubbler 15, a dryer I16, an ionization chamber I17, a flow meter III 18, a secondary palladium membrane reactor 19, a condenser 20, a dryer II 21, a flow meter V22, an ionization chamber III 23, a pressure sensor II24, a buffer tank II25, a booster pump II26, a hydrogen storage bed II 7.1, a thermocouple insertion port I7-2, a pure hydrogen inlet 7-3, a hydrogen isotope gas outlet I7-4, a tritium water vapor inlet 7-5, a tail gas outlet I7-6, a catalyst I18.1, a thermocouple insertion port II 18-2, a scavenging gas inlet 18 3, a hydrogen isotope gas outlet II 18-4, a tritium water vapor-carbon monoxide gas inlet 18-5, a tail gas outlet II18-6, a catalyst II 18-7 and an adsorbent.
Detailed Description
The high-concentration tritium water treatment device comprises a water vapor generation unit, a membrane reaction unit, a hydrogen storage unit and a tail gas treatment unit which are sequentially connected, as shown in figure 1, wherein the water vapor generation unit comprises a gas carrying bottle 1, a flowmeter I2, a tritium water tank 3, a constant flow pump 4 and a water generator 5, wherein the gas carrying bottle 1 is connected with the water generator 5 through a flowmeter I2, and the tritium water tank 3 is connected with the water generator 5 through the constant flow pump 4; the membrane reaction unit comprises a primary palladium membrane reactor 7 and a secondary palladium membrane reactor 18, wherein the primary palladium membrane reactor 7 and the secondary palladium membrane reactor 18 are both provided with catalyst filling areas, a tritium water concentration detection branch is arranged between the two-stage palladium membrane reactors, a pure hydrogen inlet is arranged on the permeation side of the primary palladium membrane reactor 7, a flowmeter II6 is connected through the pure hydrogen inlet, the hydrogen flow is controlled through a flowmeter II6, a carbon monoxide inlet is arranged on the raw material side of the secondary palladium membrane reactor 18, a flowmeter III17 is connected through the carbon monoxide inlet, and the carbon monoxide flow is controlled through a flowmeter III 17; the tail gas end at the raw material side of the primary palladium membrane reactor 7 is connected to the inlet end at the raw material side of the secondary palladium membrane reactor 18 through a valve V-4, and the tail gas end at the raw material side of the secondary palladium membrane reactor 18 is connected with a tail gas treatment unit; and the permeation sides of the two-stage palladium membrane reactor are both connected with a hydrogen storage unit. Specifically, as shown in fig. 2, the primary palladium membrane reactor comprises a thermocouple insertion port I7-1, a pure hydrogen inlet 7-2, a hydrogen isotope gas outlet I7-3, a tritium vapor inlet 7-4, and an exhaust gas outlet I7-5, and is filled with a catalyst I7-6; as shown in FIG. 3, the secondary palladium membrane reactor comprises a thermocouple insertion port II18-1, a purge gas inlet 18-2, a hydrogen isotope gas outlet II18-3, a tritium vapor-carbon monoxide gas inlet 18-4 and a tail gas outlet II18-5, and is filled with a catalyst II18-6 and an adsorbent 18-7.
Specifically, the device has the working procedures as follows: tritium water with the concentration of C1 and the flow rate of V1 enters a primary palladium membrane reactor 7, after hydrogen water isotope exchange, the concentration of the tritium water is C2, the flow rate of V1 enters a secondary palladium membrane reactor 18, the concentration of the treated tritium water is C2, and the flow rate of the treated tritium water is V2. The tritium removal factor is defined as the ratio of the tritium content in tritium water to be treated to the tritium content in treated tritium water, so that the tritium removal factor of the primary palladium membrane reactor 7 is C1/C2, the tritium removal factor of the secondary palladium membrane reactor 18 is V1/V2, and the total tritium removal factor of the two-stage palladium membrane reactor is C1V1/C2V 2. The method comprises the steps of obtaining C1 through sampling and measuring of a tritium water tank 3, obtaining C2 through sampling and measuring of a bubbler 14 in a tritium water concentration detection branch circuit between two stages of palladium membrane reactors, obtaining V1 through measuring of a constant flow pump 4 with a meter, and obtaining V2 through conversion of tritium water amount collected by a condenser 19 in unit time.
The design of the device can also realize tritium balance, most tritium in high-concentration tritium water permeates through the two-stage palladium membrane reactor and enters the hydrogen storage unit, and the rest tritium enters the condenser 19. The amount of tritium of the raw material provided by the tritium water tank 3 is C1V1, the amount of residual tritium collected by the condenser 19 is C2V2, the amount of tritium stored in the hydrogen storage bed I13 is C3V3, the amount of tritium stored in the hydrogen storage bed II26 is C4V4, wherein C3 and C4 are respectively measured by an ionization chamber II9 and an ionization chamber III22, and V3 and V4 are respectively measured by a flowmeter IV8 and a flowmeter V21. Based on material conservation, C1V1 ═ C2V2+ C3V3+ C4V 4. From the difference between the left and right of the equation, the amount of tritium retained and leaked by the high tritium water treatment apparatus of the present invention can be calculated.
Furthermore, the primary palladium membrane reactor 7 is provided with a constant temperature area, and the outer side of a membrane tube of the constant temperature area of the primary palladium membrane reactor is filled with variable valence oxide loadThe metal catalyst changes the hydrogen water isotope exchange reaction course from the molecular layer to improve the reaction rate. The second-stage palladium membrane reactor 18 is provided with a constant temperature area, and the outer side of a membrane tube of the constant temperature area of the second-stage palladium membrane reactor is filled with a loaded metal catalyst and CO 2 An adsorbent.
Further, the valence-variable oxide filled outside the membrane tube of the constant temperature area of the primary palladium membrane reactor is TiO 2 、CeO 2 Or ZrO 2 The metal catalyst is any one of Pt, Pd and Ni-based catalysts.
Further, the ratio of the supported metal catalyst to the adsorbent in the secondary palladium membrane reactor is 2: 1-4: 1.
Further, said CO 2 The adsorbent is lithium orthosilicate, and the supported metal catalyst is a Pt-based catalyst supported by alumina or silica.
The effect of the catalyst and the adsorbent of the invention is as follows: water molecules participate in chemical reactions, and dissociation of water is the most difficult step, so that the catalyst design starts from lowering the dissociation energy barrier of the water molecules, and the activity of the catalyst can be effectively improved. As is well known in the art, a variable valence oxide such as CeO 2 ，TiO 2 The surface is easy to generate oxygen vacancy, so that an active site can be provided for dissociation of water molecules, and therefore, the Pt catalyst taking the valence-variable oxide as the carrier can remarkably improve the chemical reaction rate in which the water molecules participate. The invention uses Pt/CeO 2 For example, the hydrogen water isotope exchange reaction introduced into the primary palladium membrane reactor is obviously different from the common diatomite-supported noble metal-supported catalyst, so that the reaction rate can be effectively improved, and the tritium removal factor can be increased. For the water-vapor transformation reaction of the secondary palladium membrane reactor, Li is adopted 4 SiO 4 As an adsorbent, its function is to absorb CO 2 Removal of the product, according to le chatelier's principle, can drive the reaction to the right, increasing the equilibrium conversion.
Further, the tritium water concentration detection branch comprises: bubbler 14, dryer I15, ionization chamber I16.
Further, the hydrogen storage unit comprises a first hydrogen storage unit connected with the permeation side of the primary palladium membrane reactor 7 and a second hydrogen storage unit connected with the permeation side of the secondary palladium membrane reactor 18, wherein the first hydrogen storage unit comprises a buffer tank I11, a booster pump I12 and a hydrogen storage bed I13, and the second hydrogen storage unit comprises a buffer tank II24, a booster pump II25 and a hydrogen storage bed II 26.
Further, the tail gas treatment unit comprises a condenser 19 and a dryer II 20.
The invention has the beneficial effects that:
(1) a two-stage series treatment process;
(2) introduction of CO in water-gas shift process 2 In-situ removal of product CO by adsorbent 2 (Li 4 SiO 4 )；
(3) Pt, Pd, Ni based catalyst supported by specific carrier (variable valence oxide).
The specific operation flow of the device of the invention is described as follows: converting high-concentration tritium water to be treated into water vapor through a water vapor generator 5, and feeding the water vapor and carrier gas helium gas into a tritium vapor inlet at the raw material side of a primary palladium membrane reactor 7 according to a certain proportion, wherein the raw material side pressure is usually controlled at 100-500 kPa; hydrogen enters a pure hydrogen inlet at the permeation side of the primary palladium membrane reactor 7, and the pressure is usually controlled to be 1-10 kPa; hydrogen permeates to the raw material side through the primary palladium membrane reactor 7 and carries out hydrogen water isotope exchange reaction with tritium-containing water vapor on the surface of the catalyst: HTO + H 2 ＝H 2 O + HT, controlling the reaction temperature at 200-400 ℃, and enabling the generated hydrogen isotope gas to permeate to the permeation side through the primary palladium membrane reactor 7 and enter a hydrogen storage bed I13; the water vapor after the tritium removal treatment by the primary palladium membrane reactor 7 continuously enters the secondary palladium membrane reactor 18, and simultaneously, a certain amount of CO is added, so that a water-vapor transformation reaction occurs on the surface of the catalyst: q 2 O+CO＝Q 2 +CO 2 The generated hydrogen isotope gas permeates to the permeation side of the secondary palladium membrane reactor 18 and enters a hydrogen storage bed II26, the tail gas is collected by a condenser 19, the residual tritium amount is measured, and the total tritium removal factor can be calculated. The gas passing through dryer II20 may be vented to the environment.
The device comprises a two-stage palladium membrane reactor, a first-stage palladium membrane reactor 7, a second-stage palladium membrane reactor 7, a third-stage palladium membrane reactor 7, a fourth-stage palladium membrane reactor 7, a fifth-stage palladium membrane reactor and a fifth-stage palladium membrane reactor, wherein the permeation sides of the two-stage palladium membrane reactor are respectively provided with an ionization chamber for measuring the tritium concentration in a hydrogen isotope simple substance, and the tail gas end of the first-stage palladium membrane reactor 7 is provided with a tritium water concentration detection branch for measuring the tail gas simple substance tritium and tritium water concentration of the first-stage palladium membrane reactor 7 and independently calculating a first-stage tritium removal factor.
Example 1
In the embodiment, the tritium water treatment device is adopted to treat tritium water, and a specific two-stage combined treatment mode is adopted, wherein the first-stage palladium membrane reactor is filled with a catalyst Pt/CeO 2 The second-stage palladium membrane reactor is mixed with and filled with catalyst Pt/Al 2 O 3 And the adsorbent Li 4 SiO 4 . The concentration C1 is 10 10 Introducing the gasified Bq/L tritiated water into the primary palladium membrane reactor at the flow V1 of 10L/h, and obtaining the tritiated water concentration C2 of 6.8 multiplied by 10 after the treatment of the primary palladium membrane reactor through the measurement of a tritiated water concentration detection branch 8 Bq/L, continuously introducing the tritium water into a secondary palladium membrane reactor for treatment, wherein the flow V2 of the residual tritium water after treatment is 0.02L/h. Through the data, the tritium removal factor of the primary palladium membrane reactor (7) is calculated to be 15, the tritium removal factor of the secondary palladium membrane reactor (18) is calculated to be 500, and the total tritium removal factor is calculated to be 7500.
This example additionally provides a control experiment in which a two-stage palladium membrane reactor was loaded with the catalyst Pt/Al 2 O 3 Absence of Li 4 SiO 4 The adsorbent and other experimental conditions were not changed. C1 is 10 10 Bq/L, V1 is 10L/h, C2 is 2.5X 10 9 Bq/L, V2 is 0.05L/h. Through the data, the tritium removal factor of the primary palladium membrane reactor (7) is calculated to be 4, the tritium removal factor of the secondary palladium membrane reactor (18) is calculated to be 200, and the total tritium removal factor is calculated to be 800.
As can be seen from the comparison of the two experiments, for the first-stage palladium membrane reactor, Pt/CeO 2 The tritium removal factor obtained by the catalyst is 15 which is obviously larger than Pt/Al 2 O 3 Tritium removal factor 4 obtained by the catalyst; for the catalyst Pt/Al of the second-stage palladium membrane reactor 2 O 3 And the adsorbent Li 4 SiO 4 The tritium removal factor obtained by mixed loading is 500, which is obviously larger than the tritium removal factor 200 obtained without an adsorbent.
Therefore, the tritium removal factor for tritium water treatment can be obviously improved by the two-stage series treatment mode. In addition, the first-level hydrogen water isotope exchange reactor can reduce the concentration of the tritium water serving as the raw material by one order of magnitude and then is introduced into the second-level water vapor exchange reactor, and the radiation chemistry theory shows that the tritium concentration can be reduced, and the complex side reaction caused by the beta decay of tritium can be reduced.
Claims (8)
1. The high-concentration tritium water treatment device is characterized by comprising a water vapor generation unit, a membrane reaction unit, a hydrogen storage unit and a tail gas treatment unit which are sequentially connected, wherein the water vapor generation unit comprises a gas carrying bottle (1), a flowmeter I (2), a tritium water tank (3), a constant flow pump (4) and a water vapor generator (5), the gas carrying bottle (1) is connected with the water vapor generator (5) through the flowmeter I (2), and the tritium water tank (3) is connected with the water vapor generator (5) through the constant flow pump (4); the membrane reaction unit comprises a primary palladium membrane reactor (7) and a secondary palladium membrane reactor (18), wherein the primary palladium membrane reactor (7) and the secondary palladium membrane reactor (18) are both provided with catalyst loading areas, a tritium water concentration detection branch is arranged between the two stages of palladium membrane reactors, a pure hydrogen inlet is arranged on the permeation side of the primary palladium membrane reactor (7), a flowmeter II (6) is connected through the pure hydrogen inlet, a carbon monoxide inlet is arranged on the raw material side of the secondary palladium membrane reactor (18), and a flowmeter III (17) is connected through the carbon monoxide inlet, wherein the tail gas end on the raw material side of the primary palladium membrane reactor (7) is connected to the inlet end on the raw material side of the secondary palladium membrane reactor (18) through a valve V-4, and the tail gas end on the raw material side of the secondary palladium membrane reactor (18) is connected with a tail gas treatment unit; the permeation sides of the two-stage palladium membrane reactor are both connected with a hydrogen storage unit; the primary palladium membrane reactor comprises a thermocouple insertion port I (7-1), a pure hydrogen inlet (7-2), a hydrogen isotope gas outlet I (7-3), a tritium water vapor inlet (7-4) and a tail gas outlet I (7-5), and is filled with a catalyst I (7-6); the secondary palladium membrane reactor comprises a thermocouple insertion port II (18-1), a purge gas inlet (18-2), a hydrogen isotope gas outlet II (18-3), a tritium steam-carbon monoxide gas inlet (18-4) and a tail gas outlet II (18-5), and is filled with a catalyst II (18-6) and an adsorbent (18-7).
2. The high tritium water treatment device according to claim 1, characterized in that the catalyst i (7-6) in the catalyst loading zone of the primary palladium membrane reactor (7) is a metal catalyst loaded with a variable valence oxide, and a constant temperature zone is provided in the length range of the membrane tube in the catalyst loading zone of the primary palladium membrane reactor (7); the catalyst II (18-6) and the adsorbent (18-7) in the catalyst filling area of the secondary palladium membrane reactor (18) are respectively a supported metal catalyst and CO 2 The length range of the membrane tube in the catalyst loading area of the secondary palladium membrane reactor (18) is also provided with a constant temperature area.
3. The apparatus of claim 2, wherein the valence transition oxide is any one of TiO2, CeO2, or ZrO2, and the metal catalyst is any one of Pt, Pd, and Ni-based catalysts.
4. The apparatus of claim 2, wherein the supported metal catalyst and CO in the secondary palladium membrane reactor (18) are present in combination 2 The adsorbent ratio is 2: 1-4: 1.
5. The high concentration tritium water treatment device according to claim 2, wherein the CO2 adsorbent is lithium orthosilicate and the supported metal catalyst is alumina or silica supported Pt-based catalyst.
6. The high concentration tritium water treatment device as claimed in claim 1, wherein the tritium water concentration detection branch comprises: a bubbler (14), a dryer I (15) and an ionization chamber I (16).
7. The apparatus for treating high concentration tritium water according to claim 1, wherein the hydrogen storage unit comprises a first hydrogen storage unit connected with the permeation side of the primary palladium membrane reactor (7) and a second hydrogen storage unit connected with the permeation side of the secondary palladium membrane reactor (18), wherein the first hydrogen storage unit comprises a buffer tank I (11), a booster pump I (12) and a hydrogen storage bed I (13), and the second hydrogen storage unit comprises a buffer tank II (24), a booster pump II (25) and a hydrogen storage bed II (26).
8. The apparatus for treating high tritium concentration water according to claim 1, wherein the tail gas treatment unit comprises a condenser (19) and a dryer II (20).
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| CN202010943964.5A CN112037958B (en) | 2020-09-09 | 2020-09-09 | High-concentration tritium water treatment device |
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