Alkali solution-based absorption device for reducing c-14 emissions in high-temperature reactor

Abstract

Disclosed in the present invention is an alkali solution-based absorption device for reducing C-14 emissions in a high-temperature reactor. The device comprises: a tank assembly, comprising an absorption tank, a tank cover, and a spraying pipe; a stirring assembly, arranged inside the tank assembly and comprising a limiting pipe, a movable plug, and a lifting / lowering ring; and a filtering assembly, uniformly arranged around the stirring assembly and comprising a filter pipe and a serial ring. By means of cooperation among the tank assembly, the stirring assembly, and the filtering assembly, the device accelerates the reaction rate and the reaction extent of waste gas while improving the collection extent and the collection efficiency of precipitates generated by the reaction.

Description

An alkaline solution absorption device for reducing C-14 emissions from high-temperature reactors Technical Field

[0001] The invention relates to the technical field of nuclear engineering radioactive waste treatment, in particular to an alkaline solution absorption device for reducing the emission of C-14 from a high-temperature reactor. Background Art

[0002] The final safety analysis of the domestic high-temperature gas-cooled reactor demonstration project pointed out that the annual emission of C-14 to the environment from the operation of the two reactors is 2.0×10 11 Bq / a, of which 1.84×10 11 Bq / a (92% of the total) is discharged through the regeneration tail gas of the helium purification system, with a volume of about 34m 3 According to the environmental impact assessment report for the demonstration project, C-14 is the radionuclide that contributes the most to the radiation dose to the public surrounding the high-temperature reactor unit, accounting for 75% of the effective individual dose. Therefore, reducing C-14 emissions from the high-temperature reactor can effectively reduce the radiation dose to the public.

[0003] The regenerated tail gas has a small volume and can collect the CO2 in it through alkaline solution absorption, convert it into solid treatment, and reduce its emission to the environment through the gaseous route. The reduction can reach 95% of the original gaseous release. When treating the tail gas, it is necessary to fully mix the waste gas and solution in the absorption tank, and it is also necessary to ensure that there is enough Ba(OH)2 in the absorption liquid. The general alkaline solution absorption device does not use a stirring device when dissolving the waste gas, and the generated precipitate is also collected after it falls to the bottom of the absorption tank. This may cause the waste gas reaction to be insufficient and the precipitate collection efficiency is low.

[0004] Summary of the Invention

[0005] In view of the above problems existing in the existing alkali solution absorption device, the present invention is proposed.

[0006] Therefore, the problem to be solved by the present invention is how to accelerate the reaction speed and degree of the exhaust gas and the degree and efficiency of the precipitation collection.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: an alkaline solution absorption device for reducing the emission of C-14 from a high-temperature reactor, comprising a tank assembly, a stirring assembly and a filtering assembly.

[0008] As a preferred solution of the alkaline solution absorption device for reducing the emission of C-14 from high-temperature reactors according to the present invention, the tank assembly comprises an absorption tank, a tank cover and a nozzle, wherein the tank cover is arranged on the top of the absorption tank, and the nozzle is arranged on the bottom side of the absorption tank;

[0009] A stirring assembly is provided inside the tank assembly and includes a limiting tube, a movable plug, and a lifting ring. The movable plug is provided at the center of the tank cover. One end of the limiting tube passes through the center of the bottom surface of the absorption tank, and the other end cooperates with the movable plug. The lifting ring is sleeved on the outside of the limiting tube.

[0010] The filter assembly is evenly arranged around the periphery of the stirring assembly and comprises a filter tube and a connecting ring. The connecting ring is arranged on the top of the lifting ring, and the filter tube is evenly arranged around the periphery of the limiting tube.

[0011] As a preferred solution of the alkaline solution absorption device for reducing the emission of C-14 from high-temperature reactors according to the present invention, the tank assembly further comprises a spray ring and a nozzle, the spray ring being arranged at one end of the nozzle located in the absorption tank, the spray ring being concentric with the absorption tank, the nozzle being evenly arranged around the top of the spray ring, the spray ring being hollow, and the nozzle being connected to the nozzle pipe, the spray ring and the nozzle.

[0012] As a preferred solution of the alkaline solution absorption device for reducing the emission of high-temperature reactor C-14 as described in the present invention, wherein: the absorption tank is provided with an air inlet, a slag outlet and a limiting hole, the air inlet is arranged at the bottom of the side of the absorption tank, the nozzle and the air inlet are matched, the limiting hole is arranged at the center of the bottom surface of the absorption tank, the limiting tube passes through the limiting hole, the slag outlet is evenly arranged around the limiting hole, and the bottom of the filter tube and the slag outlet correspond one to one.

[0013] As a preferred embodiment of the alkaline solution absorption device for reducing the emission of high-temperature reactor C-14 according to the present invention, the stirring assembly further comprises a spring member, the spring member comprising a spring, a top fixed plate and a bottom movable plate, the top fixed plate being arranged slightly above the middle of the limiting tube, the bottom movable plate being arranged slightly below the middle of the limiting tube, the spring being arranged between the top fixed plate and the bottom movable plate, and the spring being sleeved on the outside of the limiting tube;

[0014] The spring component also includes a bottom limiting ring, which has two parts and is arranged at the bottom and top of the side of the bottom movable plate. The lifting ring is arranged between the two bottom limiting rings, and the connecting ring is arranged at the top of the bottom limiting ring.

[0015] As a preferred solution of the alkaline solution absorption device for reducing the emission of C-14 from high-temperature reactors as described in the present invention, wherein: the limiting tube is provided with a long gas outlet hole and a limiting groove, the long gas outlet hole and the limiting tube are coaxial, the long gas outlet hole is arranged from the middle to the top of the limiting tube, the limiting groove runs through the middle to the bottom of the limiting tube, and the top of the limiting groove intersects with the bottom of the long gas outlet hole.

[0016] As a preferred solution of the alkaline solution absorption device for reducing the emission of C-14 from high-temperature reactors described in the present invention, the stirring assembly further comprises fan blades and a limit plate, the fan blades are evenly arranged around the side of the lifting ring, the limit plate is arranged at the middle top of the lifting ring, and the limit plate cooperates with the limit groove.

[0017] As a preferred solution of the alkaline solution absorption device for reducing the emission of high-temperature reactor C-14 according to the present invention, the filter assembly further includes a limiting column and a limiting frame, the limiting frame is arranged in the middle of the filter tube, and the limiting column is arranged at the top of the limiting frame.

[0018] As a preferred solution of the alkaline solution absorption device for reducing the emission of C-14 from high-temperature reactors according to the present invention, the filter tube is provided with a slanted top and a scraping groove, the slanted top is provided at the top of the filter tube, the scraping groove is provided on the side of the filter tube, the top of the scraping groove is connected to the lowest point of the slanted top, and the bottom of the scraping groove is in contact with the limit frame.

[0019] As a preferred solution of the alkaline solution absorption device for reducing the emission of high-temperature reactor C-14 according to the present invention, the filter assembly further includes a connecting rod and a scraper ring, one end of the connecting rod is evenly arranged around the side of the connecting ring, the other end of the connecting rod is fixedly connected to the scraper ring, the limiting column passes through the center of the scraper ring, and the outer side of the scraper ring cooperates with the inner wall of the filter tube.

[0020] As a preferred solution of the alkaline solution absorption device for reducing the emission of C-14 from high-temperature reactors according to the present invention, wherein:

[0021] An air outlet is provided at the center of the tank cover, and the movable plug is matched with the air outlet.

[0022] The beneficial effects of the present invention are as follows: with the cooperation of the tank assembly, the stirring assembly and the filtering assembly, the device can accelerate the speed and degree of the exhaust gas reaction, and at the same time accelerate the degree and efficiency of the collection of the precipitate generated by the reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive efforts. Among them:

[0024] Figure 1 is the overall structural diagram of the alkali solution absorption device for reducing the emission of high-temperature reactor C-14.

[0025] Figure 2 is a structural diagram of the stirring assembly of the alkali solution absorption device for reducing the emission of high-temperature reactor C-14.

[0026] Figure 3 is a structural diagram of the tank assembly of the alkali solution absorption device for reducing the emission of high-temperature reactor C-14.

[0027] Figure 4 is a cross-sectional view of part of the stirring assembly of the alkali solution absorption device for reducing the emission of high-temperature reactor C-14.

[0028] Figure 5 is a structural diagram of the limit tube of the alkali solution absorption device for reducing the emission of high-temperature reactor C-14.

[0029] Figure 6 is a structural diagram of the filter assembly of the alkali solution absorption device for reducing the emission of high-temperature reactor C-14. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0033] Example 1

[0034] 1 to 6 , a first embodiment of the present invention is shown, which provides an alkaline solution absorption device for reducing emissions from a high-temperature reactor C-14. The alkaline solution absorption device for reducing emissions from a high-temperature reactor C-14 includes a tank assembly 100 , a stirring assembly 200 , and a filter assembly 300 .

[0035] The tank assembly 100 is used to hold the reaction solution and other components;

[0036] The stirring assembly 200 is used to allow the exhaust gas and the solution to react more fully and to dissolve the added reaction powder more quickly;

[0037] The filter assembly 300 is used to filter and collect the generated precipitate.

[0038] Specifically, the tank assembly 100 includes an absorption tank 101 , a tank cover 102 and a nozzle 103 . The tank cover 102 is disposed on the top of the absorption tank 101 , and the nozzle 103 is disposed on the bottom side of the absorption tank 101 .

[0039] The absorption tank 101 and the tank cover 102 form a closed space, and the nozzle 103 is inserted into the absorption tank 101 from the side to input the exhaust gas.

[0040] The stirring assembly 200 is arranged inside the tank body assembly 100, and includes a limiting tube 201, a movable plug 202 and a lifting ring 204. The movable plug 202 is arranged at the center of the tank cover 102. One end of the limiting tube 201 passes through the center of the bottom surface of the absorption tank 101, and the other end cooperates with the movable plug 202. The lifting ring 204 is sleeved on the outside of the limiting tube 201.

[0041] The top of the limiting pipe 201 is connected to the tank cover 102 and is used to discharge the waste gas after the reaction. The bottom passes through the absorption tank 101 and is connected to the external power component.

[0042] The movable plug 202 connects the limiting tube 201 and the tank cover 102, ensuring sealing while not hindering the rotation of the limiting tube 201;

[0043] The lifting ring 204 is used to adjust the positions of some parts of the stirring assembly 200.

[0044] The filter assembly 300 is evenly arranged around the stirring assembly 200 and includes a filter tube 301 and a link 304 . The link 304 is arranged on the top of the lifting ring 204 , and the filter tube 301 is evenly arranged around the limiting tube 201 .

[0045] The filter tube 301 absorbs and collects the generated precipitate when the solution in the absorption tank 101 rotates, preventing the precipitate from falling to the bottom and then being collected, thereby speeding up the speed and efficiency of precipitate collection;

[0046] The chain 304 cooperates with the filter tube 301 and other filter components 300 to accelerate the collection of sediment.

[0047] Specifically, the tank assembly 100 also includes a spray ring 104 and a nozzle 105. The spray ring 104 is arranged at one end of the nozzle 103 in the absorption tank 101. The spray ring 104 and the absorption tank 101 are concentric. The nozzle 105 is evenly arranged around the top of the spray ring 104. The spray ring 104 is hollow, and the nozzle 103, the spray ring 104 and the nozzle 105 are connected.

[0048] The bottom of the nozzle 105 is connected to the spray ring 104. The middle side of the nozzle 105 is evenly surrounded by lateral openings. The spray ring 104 is used to guide the exhaust gas, and the nozzle 105 is used to evenly output the exhaust gas input into the absorption tank 101, so that the solution and the exhaust gas can react more fully.

[0049] Specifically, the absorption tank 101 is provided with an air inlet H1, a slag outlet H2 and a limiting hole H3. The air inlet H1 is arranged at the bottom of the side of the absorption tank 101, the nozzle 103 and the air inlet H1 cooperate, the limiting hole H3 is arranged at the center of the bottom surface of the absorption tank 101, the limiting tube 201 passes through the limiting hole H3, the slag outlet H2 is evenly arranged around the limiting hole H3, and the bottom of the filter tube 301 corresponds to the slag outlet H2 one by one.

[0050] The air inlet H1 is used to receive waste gas, the slag outlet H2 is used to collect sediment, and the limiting hole H3 is used to place the limiting tube 201.

[0051] Specifically, the stirring assembly 200 further includes a spring member 203, which includes a spring 203a, a top fixed plate 203b, and a bottom movable plate 203c. The top fixed plate 203b is disposed slightly above the middle of the limiting tube 201, and the bottom movable plate 203c is disposed slightly below the middle of the limiting tube 201. The spring 203a is disposed between the top fixed plate 203b and the bottom movable plate 203c, and the spring 203a is sleeved on the outside of the limiting tube 201.

[0052] The spring member 203 further includes a bottom limiting ring 203d. The bottom limiting ring 203d has two parts, which are arranged at the bottom and top of the side of the bottom movable plate 203c. The lifting ring 204 is arranged between the two bottom limiting rings 203d, and the connecting ring 304 is arranged at the top of the bottom limiting ring 203d.

[0053] The spring element 203 is used to passively adjust the lifting and lowering of other parts of the stirring assembly 200 .

[0054] Specifically, the limiting tube 201 is provided with a long air outlet hole H5 and a limiting groove K1. The long air outlet hole H5 and the limiting tube 201 are coaxial. The long air outlet hole H5 is set from the middle to the top of the limiting tube 201. The limiting groove K1 runs through the middle to the bottom of the limiting tube 201. The top of the limiting groove K1 intersects with the bottom of the long air outlet hole H5.

[0055] The long air outlet hole H5 is used to protrude above the liquid level of the absorption tank 101 to discharge the waste gas after the reaction. The limiting groove K1 cooperates with the spring component 203 to adjust the lifting and lowering of other parts of the stirring assembly 200.

[0056] Specifically, the stirring assembly 200 further includes blades 205 and a limiting plate 206. The blades 205 are evenly arranged around the side of the lifting ring 204. The limiting plate 206 is arranged at the middle top of the lifting ring 204. The limiting plate 206 cooperates with the limiting groove K1.

[0057] The fan blades 205 stir the solution by rotating, accelerating the gas reaction and the dissolution of the powder; the limit plate 206 cooperates with the lifting ring 204 to allow the fan blades 205 to rise and fall under the action of the spring 203a and gravity; the limit plate 206 cooperates with the limit groove K1, and when the fan blades 205 rise to the top of the limit groove K1, the air outlet long hole H5 is blocked to prevent the exhaust gas from being discharged due to insufficient reaction when there are too few reactants in the solution.

[0058] Specifically, the filter assembly 300 further includes a limiting post 302 and a limiting frame 303 . The limiting frame 303 is disposed in the middle of the filter tube 301 , and the limiting post 302 is disposed on the top of the limiting frame 303 .

[0059] Specifically, the filter tube 301 is provided with a slanted top X1 and a scraping groove K2. The slanted top X1 is arranged at the top of the filter tube 301, and the scraping groove K2 is arranged on the side of the filter tube 301. The top of the scraping groove K2 is connected to the lowest point of the slanted top X1, and the bottom of the scraping groove K2 is in contact with the limiting frame 303.

[0060] Specifically, the filter assembly 300 also includes a connecting rod 305 and a scraper ring 306. One end of the connecting rod 305 is evenly arranged around the side of the connecting ring 304, and the other end of the connecting rod 305 is fixedly connected to the scraper ring 306. The limiting column 302 passes through the center of the scraper ring 306, and the outer side of the scraper ring 306 is matched with the inner wall of the filter tube 301.

[0061] The limiting column 302 and the limiting frame 303 are used to limit the displacement of the scraper ring 306. The scraper ring 306 is used to scrape off the sediment collected on the inner wall of the filter tube 301 and collect the sediment from the slag outlet H2.

[0062] Specifically, an air outlet H4 is provided at the center of the tank cover 102, and the movable plug 202 cooperates with the air outlet H4.

[0063] The two ends of the movable plug 202 are connected to each other, and are used to maintain the sealing of the connection between the absorption tank 101 and the limiting pipe 201, while not affecting the emission of waste gas after the reaction.

[0064] An external motor is provided on the outside of the bottom of the absorption tank 101 , and a solution component analysis device is provided inside. A feeding device that penetrates the tank cover 102 is also provided on the outside of the tank cover 102 .

[0065] During use, the absorption tank 101 is filled with the reaction solution, the tank cover 102 is closed, and the device is sealed. From a top view, the external motor drives the limiting tube 201 to rotate slowly counterclockwise. At this time, the fan blade 205 is kept in the middle position under the resistance of the solution and its own gravity. At the same time, the exhaust gas passes through the nozzle 103 and the spray ring 104, and is evenly sprayed into the solution from the nozzle 105. The filter tube 301 rotates and absorbs the generated precipitate.

[0066] When the reactant in the solution is insufficient, the reactant is added to the device through the feeding device, and the external motor is reversed at the same time to make the limiting tube 201 rotate slowly clockwise.

[0067] At this time, the fan blade 205 will slowly fall to the bottom of the device under the resistance of the solution and its own gravity, and the link 304 will be driven to the bottom by the bottom limit ring 203d, causing the scraper ring 306 to be brought down by the connecting rod 305. The scraper ring 306 cleans the inner wall of the filter tube 301 and the outer wall of the limit column 302, and scrapes off the adsorbed precipitate to the slag outlet H2.

[0068] Example 2

[0069] 1 to 6 , a second embodiment of the present invention is shown, which is based on the previous embodiment.

[0070] The alkali solution absorption device also includes a waste gas storage tank, a pressure reducing valve, an external motor, a feeding device, a solution component analysis device, etc. The tank assembly 100, the stirring assembly 200 and the filtering assembly 300 together constitute a reaction chamber.

[0071] When using:

[0072] Pour Ba(OH)2 solution into the absorption tank 101;

[0073] The helium-purified regenerated waste gas stored in the waste gas storage tank is decompressed to 0.12-0.15 MPa through a pressure reducing valve and then transferred to the absorption tank 101 through the nozzle 103 at a flow rate of 10-15 L / min;

[0074] The waste gas reacts with the Ba(OH)2 solution in the absorption tank 101 through the spray ring 104 and the nozzle 105 to generate BaCO3 precipitation;

[0075] The remaining gas after being absorbed by the solution is discharged from the top of the tank cover 102 through the top of the limit pipe 201 and the movable plug 202 to the factory exhaust system;

[0076] To improve the absorption rate, the overall absorption device uses two series-connected reaction chambers; each cylindrical reaction chamber has a volume of 100L, an internal diameter of about 50cm, and a height of about 60cm; when working, the internal solution is about 60L;

[0077] When the solution component analysis device monitors that the concentration of Ba(OH)2 solution is lower than 2%, Ba(OH)2 can be added to the absorption tank 101 through the feeding device;

[0078] Change the direction of the external motor and accelerate it to allow Ba(OH)2 to dissolve quickly and allow the adsorbed precipitate to be collected through the slag outlet H2;

[0079] Ba(OH)2 powder addition rate is 100-150 g / min;

[0080] The working temperature of the Ba(OH)2 solution in the absorption device is 30-40°C;

[0081] Each treatment of regeneration waste gas is 20-30m 3 Waste gas, mainly helium, CO2 accounts for 5%, and the amount of CO2 that needs to be collected and converted into precipitation each time is no more than 1.5m 3 ;

[0082] After each batch of exhaust gas is treated, about 10 kg of BaCO3 precipitate is formed in the reaction chamber, which is discharged through the slag outlet H2 at the bottom of the filter tube 301 and then filtered and dried at a drying temperature of less than 200°C to form a dry BaCO3 solid.

[0083] The Ba(OH)2 solution after filtration to remove the precipitate can be reloaded into the absorption device to continue to be used for the treatment of the next batch of waste gas.

[0084] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A lye absorption device for reducing C-14 emissions from high-temperature reactors, characterized by: include, A tank assembly (100) comprises an absorption tank (101), a tank cover (102) and a nozzle (103), wherein the tank cover (102) is arranged on the top of the absorption tank (101), and the nozzle (103) is arranged on the bottom of the side of the absorption tank (101); a stirring assembly (200) disposed inside the tank assembly (100), comprising a position limiting tube (201), a movable plug (202) and a lifting ring (204); the movable plug (202) being disposed at the center of the tank cover (102); one end of the position limiting tube (201) passing through the center of the bottom surface of the absorption tank (101); and the other end cooperating with the movable plug (202); and the lifting ring (204) being sleeved on the outside of the position limiting tube (201); and The filter assembly (300) is evenly arranged around the stirring assembly (200), and comprises a filter tube (301) and a connecting ring (304). The connecting ring (304) is arranged on the top of the lifting ring (204), and the filter tube (301) is evenly arranged around the limiting tube (201).

2. The alkaline solution absorption device for reducing C-14 emissions from high-temperature reactors according to claim 1, characterized in that: The tank assembly (100) further includes a spray ring (104) and a nozzle (105). The spray ring (104) is arranged at one end of the nozzle (103) in the absorption tank (101). The spray ring (104) and the absorption tank (101) are concentric. The nozzle (105) is evenly arranged around the top of the spray ring (104). The spray ring (104) is hollow. The nozzle (103), the spray ring (104) and the nozzle (105) are connected.

3. The alkaline solution absorption device for reducing C-14 emissions from high-temperature reactors according to claim 2, characterized in that: The absorption tank (101) is provided with an air inlet (H1), a slag outlet (H2) and a limiting hole (H3); the air inlet (H1) is arranged at the bottom of the side of the absorption tank (101); the nozzle (103) and the air inlet (H1) cooperate; the limiting hole (H3) is arranged at the center of the bottom surface of the absorption tank (101); the limiting tube (201) passes through the limiting hole (H3); the slag outlet (H2) is evenly arranged around the limiting hole (H3); and the bottom of the filter tube (301) corresponds to the slag outlet (H2) one by one.

4. The alkaline solution absorption device for reducing C-14 emissions from high-temperature reactors according to claim 3, characterized in that: The stirring assembly (200) further comprises a spring member (203), the spring member (203) comprising a spring (203a), a top fixed plate (203b) and a bottom movable plate (203c), the top fixed plate (203b) being arranged at an upper middle portion of the position limiting tube (201), the bottom movable plate (203c) being arranged at a lower middle portion of the position limiting tube (201), the spring (203a) being arranged between the top fixed plate (203b) and the bottom movable plate (203c), and the spring (203a) being sleeved on the outside of the position limiting tube (201); The spring member (203) further comprises a bottom limiting ring (203d), wherein the bottom limiting ring (203d) comprises two parts and is arranged at the bottom and top of the side of the bottom movable plate (203c); the lifting ring (204) is arranged between the two bottom limiting rings (203d); and the connecting ring (304) is arranged at the top of the bottom limiting ring (203d).

5. The alkaline solution absorption device for reducing C-14 emissions from high-temperature reactors according to claim 4, characterized in that: The limiting tube (201) is provided with a long air outlet hole (H5) and a limiting groove (K1); the long air outlet hole (H5) and the limiting tube (201) are coaxial; the long air outlet hole (H5) is provided from the middle to the top of the limiting tube (201); the limiting groove (K1) passes through the middle to the bottom of the limiting tube (201); the top of the limiting groove (K1) and the bottom of the long air outlet hole (H5) intersect.

6. The alkaline solution absorption device for reducing C-14 emissions from high-temperature reactors according to claim 5, characterized in that: The stirring assembly (200) further comprises fan blades (205) and a limiting plate (206), wherein the fan blades (205) are evenly arranged around the side of the lifting ring (204), and the limiting plate (206) is arranged at the middle top of the lifting ring (204), and the limiting plate (206) cooperates with the limiting groove (K1).

7. The alkaline solution absorption device for reducing C-14 emissions from high-temperature reactors according to claim 5 or 6, characterized in that: The filter assembly (300) further comprises a limiting column (302) and a limiting frame (303), wherein the limiting frame (303) is arranged in the middle of the filter tube (301), and the limiting column (302) is arranged on the top of the limiting frame (303).

8. The alkaline solution absorption device for reducing C-14 emissions from high-temperature reactors according to claim 7, characterized in that: The filter tube (301) is provided with a sloping top (X1) and a scraping groove (K2), wherein the sloping top (X1) is provided at the top of the filter tube (301), and the scraping groove (K2) is provided at the side of the filter tube (301), the top of the scraping groove (K2) is connected to the lowest point of the sloping top (X1), and the bottom of the scraping groove (K2) is in contact with the limiting frame (303).

9. The alkaline solution absorption device for reducing C-14 emissions from high-temperature reactors according to claim 8, characterized in that: The filter assembly (300) further comprises a connecting rod (305) and a scraper ring (306), one end of the connecting rod (305) is evenly arranged around the side of the link (304), and the other end of the connecting rod (305) is fixedly connected to the scraper ring (306). The scraper ring (306) has the limiting column (302) passing through the center of the scraper ring (306), and the outer side of the scraper ring (306) is matched with the inner wall of the filter tube (301).

10. The alkaline solution absorption device for reducing C-14 emissions from high-temperature reactors according to claim 8 or 9, characterized in that: An air outlet hole (H4) is provided at the center of the tank cover (102), and the movable plug (202) cooperates with the air outlet hole (H4).

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