A low and non-radioactive waste resin cleaning and unloading device and a cleaning and unloading method

Abstract

The present application belongs to the technical field of nuclear power plant radioactive waste treatment, and particularly relates to a low-level and non-radioactive waste resin cleaning and control device and a cleaning and control method, which comprises a sampling funnel, a sampling valve, a valve A, a valve B, a valve C, a valve D, a valve E, a valve F, an adjusting door, a valve G, a valve H, a valve I, a valve J, a valve K, a valve L, a valve M, a waste resin transfer bed, a decanter, a mobile waste resin transfer tank, a conveying pump C, a sight window, a hose, an exhaust pipe, a liquid level meter, an overflow pipe, a mechanical filter and a plurality of pipelines. The present application realizes classified treatment of low-level waste resin and non-radioactive waste resin, avoids cross contamination of non-radioactive waste resin and low-level waste resin, reduces the amount of radioactive waste resin generated during the operation of a nuclear power plant, is conducive to the minimization of radioactive waste, and can be widely used in the field of nuclear power plant radioactive waste resin treatment and can also be applied in other industries with similar requirements.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of radioactive waste treatment of nuclear power plants, and particularly relates to a low-level and non-radioactive waste resin cleaning and control device and a cleaning and control method. BACKGROUND

[0002] Generally, ion exchange method is used to purify the primary circuit water and radioactive waste liquid of a nuclear power plant. If the ion exchange resin is not regenerated, it will be treated as radioactive waste. In the waste resin treatment, the waste resin is unloaded from the resin bed to a storage tank for temporary storage by water power, and then is transported to a waste resin treatment unit for safe treatment by a pump and other equipment. The waste resin generated during the operation of the nuclear power plant is classified and treated according to the radioactivity level. The medium-level radioactive waste resin and the low-level radioactive waste resin are collected, stored and treated. The medium-level radioactive resin generated by the nuclear power plant in the past is collected through a pipeline and temporarily stored in a medium-level tank. After a certain period of storage, the resin is transported to a radioactive waste resin treatment unit for treatment by a delivery pump A. All waste resins with a radioactivity level lower than the medium-level radioactive waste resin are collected through a pipeline and temporarily stored in a low-level tank. After sampling and analysis, if the radioactivity level meets the national cleaning and control level, the waste resin is transported to a cleaning and control unit for treatment as non-radioactive waste resin by a delivery pump B. Otherwise, the waste resin is transported to a radioactive waste resin treatment unit for treatment by the delivery pump B.

[0003] In the actual operation of the nuclear power plant, the medium-level radioactive waste resin generated in the control area enters the medium-level tank, and the waste resin with a low radioactivity level and possibly contaminated by radioactivity enters the low-level tank. However, in actual operation, a large amount of waste resin only has the possibility of being contaminated by radioactivity, and rarely contains radioactivity. If this kind of waste resin is treated as radioactive waste resin, it does not meet the national principle of minimizing radioactive waste, and is also a waste of national resources, which is contrary to the concept of low-carbon environmental protection. Therefore, this kind of waste resin should be directly cleaned and controlled, and treated as conventional non-radioactive waste. However, according to the existing waste resin classification and treatment process of the nuclear power plant, the low-level waste resin and the non-radioactive waste cleaning and control resin enter the low-level tank, and there is a cross-contamination between the waste resin to be cleaned and controlled and the low-level waste resin, which increases the radioactive waste and does not meet the principles of classification and minimization of radioactive waste in China.

[0004] Therefore, it is necessary to design a device for classifying and treating low-level waste resin and non-radioactive waste resin and cleaning and controlling the waste resin of the nuclear power plant, so as to improve the technical problem that the low-level waste resin and the non-radioactive waste resin of the nuclear power plant are cross-contaminated and cannot be classified and treated in the prior art. SUMMARY

[0005] The application provides a low-level and non-radioactive waste resin cleaning and control device and a cleaning and control method, and aims to solve the technical problem that all waste resins with a radioactivity level lower than that of medium-level radioactive waste are stored in a low-level radioactive waste tank, which is prone to cross contamination of low-level and non-radioactive waste resins, and causes an increase in radioactive waste and does not meet the principle of radioactive waste classification and minimization in China.

[0006] The technical scheme of the application is as follows:

[0007] A low-level and non-radioactive waste resin cleaning and control device comprises the following components:

[0008] A sampling funnel, a sampling valve, valve A, valve B, valve C, valve D, valve E, valve F, an adjusting door, valve G, valve H, valve I, valve J, valve K, valve L, valve M, a waste resin transfer bed, a decanter, a mobile waste resin transfer tank, a conveying pump C, a sight window, a hose, an exhaust pipe, a liquid level meter, an overflow pipe, a mechanical filter, and a plurality of pipelines.

[0009] The top of the waste resin transfer bed is respectively provided with valve B, a liquid level meter, an exhaust pipe, a mechanical filter, and an overflow pipe.

[0010] The bottom of the waste resin transfer bed is respectively connected with valve I, valve J, and valve K through pipelines; and the waste resin transfer bed is also connected with the inlet of the conveying pump C through a pipeline.

[0011] Valve E is arranged on the pipeline at the inlet of the conveying pump C; the outlet of the conveying pump C is connected with the decanter through a pipeline, and valve F, the sight window, and valve G are sequentially arranged on the pipeline connecting the outlet of the conveying pump C with the decanter.

[0012] The lower part of the decanter is connected with the mobile waste resin transfer tank through a hose; and valve M is arranged between the hose and the decanter.

[0013] The upper end of the overflow pipe is connected with the top of the waste resin transfer bed, and the lower end of the overflow pipe is connected with a waste water collection system; and the lower end of the overflow pipe is also connected with the lower part of the sampling funnel through a hose.

[0014] Valve B is also connected with one end of valve D through a pipeline, and the other end of valve D is connected with a low-level waste resin collection main pipe; and valve C and valve A are arranged on the low-level waste resin collection main pipe.

[0015] The top of the waste resin transfer bed is also connected with the sampling valve through a pipeline.

[0016] A water seal is arranged on the waste water collection system, and the water seal has an overall S-shaped elbow structure, which is used for preventing gas in the waste liquid collection system from entering the device and adding sealing water through the sampling funnel.

[0017] The valve B is further connected with the valve H and the regulating door in sequence through pipelines; the temporary to-be-cleaned waste resin is stored in the waste resin transfer bed,

[0018] The inlet end of the exhaust pipe is connected with the top of the waste resin transfer bed, and the outlet end of the exhaust pipe is connected with the sampling funnel for collecting the water in the exhaust pipe;

[0019] The valve L is further connected with the valve K through a pipeline; the valve K and the valve L are connected to the desalted water pipeline through pipelines;

[0020] The valve J is further connected to the compressed air pipeline through a pipeline; the conveying pump C is used for conveying the waste resin in the waste resin transfer bed;

[0021] The sampling valve is used for sampling the material in the waste resin transfer bed;

[0022] The mobile waste resin transfer tank is used for receiving the cleaned and controlled resin from the decanter;

[0023] A cleaning and control method of the low-level and non-radioactive waste resin cleaning and control device, comprising the following steps:

[0024] Step one: when the nuclear power plant unloads the non-radioactive waste resin, the sampling valve, the valve A, the valve E, the valve H, the valve I, the valve J, the valve K and the valve L are closed, the valve B, the valve C and the valve D are opened, and the waste resin is unloaded to the waste resin transfer bed through hydraulic conveying; when the waste liquid in the waste resin transfer bed is too much, it enters the waste liquid collection system through the overflow pipe;

[0025] The amount of medium in the waste resin transfer bed is observed by the liquid level meter, and the volume of the waste resin transfer bed received at a time is 50% of the volume; the exhaust pipe is communicated with the room environment to ensure that the waste resin transfer bed is under normal pressure, and the outlet end is connected with the sampling funnel for collecting the water in the exhaust pipe;

[0026] Step two: when the waste resin in the waste resin transfer bed is received, the proportion of the waste resin and the water in the waste resin transfer bed is adjusted through the valve I and the valve K; the waste resin and the water are adjusted at a volume ratio of 1:1; after the proportion of the waste resin and the water is adjusted, the valve J is opened for compressed air stirring, and the valve J is closed after 2 to 8 minutes;

[0027] Step three: after the compressed air stirring is completed, the sampling valve, the valve A, the valve C, the valve D, the valve G, the valve I, the valve J, the valve K and the valve L are closed, the valve B, the valve E, the valve F, the regulating door and the valve H are opened, the conveying pump C is started, and after being stable, the sampling valve 2 is used for sampling, and the pump is stopped after the sampling is completed; the sample is analyzed for radioactivity;

[0028] Step four: if the sample analysis result in step three does not meet the cleaning control requirements, open valve J13 for compressed air stirring, and close the valve after 2 to 8 minutes; after stirring, close the sampling valve, valve B, valve C, valve G, valve I, valve J, valve K and valve L, open valve A, valve D valve E, valve F, regulating door, valve H, and start the transfer pump C to transfer the waste resin from the waste resin transfer bed to the low-level tank;

[0029] If the sample analysis result in step three meets the cleaning control requirements, open valve J for compressed air stirring, and close the valve after minutes; after stirring, close the sampling valve, valve A, valve C, valve D, valve G, valve M0, valve I, valve J, valve K and valve L, open valve B, valve E, valve F, regulating door, valve H, start the transfer pump C, and open valve G, valve M after stabilization, operate the decanter, and adjust the opening degree of the regulating door to make the flow into the decanter meet the decanter flow requirement; the waste resin and water are centrifugally separated and dewatered in the decanter, and the dewatered waste resin enters the waste resin movable transfer device; at the same time, the content of the waste resin in the pipeline is observed through the sight window, and the system is stopped when only a small amount of waste resin passes by visual observation; the waste resin movable transfer device moves to the control area, that is, the waste resin cleaning control operation is completed.

[0030] Advantages of the present application:

[0031] The low-level waste resin cleaning control device for nuclear power plants designed in the present application realizes low-level waste resin receiving, sampling, conveying, dewatering and transfer; the waste resin receiving and temporary storage are realized through the waste resin transfer bed; desalted water is designed in the device, enters from the bottom of the waste resin transfer bed through valve K, and realizes the adjustment of the proportion of waste resin and water in the waste resin transfer bed;

[0032] Compressed air is designed in the device, enters from the bottom of the waste resin transfer bed through valve J, and realizes the conveying and stirring of waste resin in the waste resin transfer bed; a liquid level meter is designed at the top of the waste resin transfer bed, and continuous measurement of the liquid level is realized; an exhaust pipe designed at the top of the waste resin transfer bed plays a breathing exhaust function, and realizes the effect that the pressure in the waste resin transfer bed is equal to the external pressure;

[0033] The low-level waste resin cleaning control device for nuclear power plants designed in the present application realizes the classified treatment of low-level waste resin and non-radioactive waste resin, avoids the cross contamination of non-radioactive waste resin and low-level waste resin, reduces the amount of radioactive waste resin generated in the operation of nuclear power plants, is conducive to the minimization of radioactive waste, is safe and convenient to operate, is easy and reliable to use, and can be widely used in the field of radioactive waste resin treatment of nuclear power plants, and can also be applied in other industries with similar requirements. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1The nuclear power plant low-level waste resin cleaning and control device is designed for the present application;

[0035] Wherein: 1-sampling funnel, 2-sampling valve, 3-valve A, 4-valve B, 5-valve C, 6-valve D, 7-valve E, 8-valve F, 9-regulating door, 10-valve G, 11-valve H, 12-valve I, 13-valve J, 14-valve K, 15-valve L, 16-valve M, 17-waste resin transfer bed, 18-decanter, 19-mobile waste resin transfer tank, 20-conveying pump C, 21-viewing window, 22-hose, 23-exhaust pipe, 24-liquid level meter, 25-overflow pipe, 26-mechanical filter, 27-water seal DETAILED DESCRIPTION

[0036] At present, the horizontal radioactive waste resin of most nuclear power plants in China is temporarily stored in the intermediate storage tank, and the low-level waste resin is also stored in the low-level storage tank. The low-level waste resin mainly comes from the low-level waste liquid treatment system and the waste liquid treatment system that may be contaminated by radioactivity. Among them: the waste resin for treating low-level radioactive waste liquid has low radioactivity, but it is still higher than the clean control level of radioactive waste in China, and should be managed as radioactive waste; the waste resin generated by the system for treating waste liquid that may be contaminated by radioactivity usually does not contain radioactivity and should be cleaned and controlled. However, due to the current problem of mixed and cross contamination of low-level waste resin and controllable waste resin in nuclear power plants, it is not conducive to the clean control of non-radioactive waste resin, and the mixing of controllable non-radioactive waste resin into low-level waste resin leads to the increase of the amount of radioactive waste generated by nuclear power plants, which is not conducive to waste minimization.

[0037] In order to realize the classified treatment of low-level waste resin and non-radioactive waste resin, reduce the amount of radioactive waste generated by nuclear power plants, and solve the problems of non-radioactive waste resin control and radioactive waste resin classified treatment, the present application designs a low-level and non-radioactive waste resin cleaning and control device and a cleaning and control method.

[0038] The low-level and non-radioactive waste resin cleaning and control device and the cleaning and control method of the present application will be described in detail below in combination with the drawings and examples.

[0039] A low-level and non-radioactive waste resin cleaning and control device, comprising:

[0040] The sampling funnel 1, the sampling valve 2, the valve A 3, the valve B 4, the valve C 5, the valve D 6, the valve E 7, the valve F 8, the regulating door 9, the valve G 10, the valve H 11, the valve I 12, the valve J 13, the valve K 14, the valve L 15, the valve M 16, the waste resin transfer bed 17, the decanter 18, the mobile waste resin transfer tank 19, the conveying pump C 20, the viewing window 21, the hose 22, the exhaust pipe 23, the liquid level meter 24, the overflow pipe 25, the mechanical filter 26, and a plurality of pipelines;

[0041] Valve A3 is installed downstream of the straight pipe of the low-level waste resin collecting manifold to the waste resin intermediate bed 17, for controlling whether the waste resin flows to the low-level waste tank or the waste resin intermediate bed 17;

[0042] Valve B4 is used to control whether the medium in the pipeline enters the waste resin intermediate bed 17;

[0043] Valve C5 is always open, and is closed when the medium of the waste resin intermediate bed 17 is transported to the low-level waste tank;

[0044] Valve D6 is always open, and is closed when the medium of the waste resin intermediate bed 17 is circulated or transported to the decanter 18;

[0045] Regulating door 9 is used to control the flow when the medium of the waste resin intermediate bed 17 is circulated; valve G10 is always closed, and is opened when the medium of the waste resin intermediate bed 17 is transported to the decanter 18;

[0046] The top of the waste resin intermediate bed 17 is respectively provided with valve B4, liquid level meter 24, exhaust pipe 23, mechanical filter 26 and overflow pipe 25;

[0047] The bottom of the waste resin intermediate bed 17 is respectively connected with valve I12, valve J13 and valve K14 through pipelines; the waste resin intermediate bed 17 is also connected with the inlet of transport pump C20 through a pipeline;

[0048] Valve J13 is always closed, and is opened when the waste resin intermediate bed 17 needs compressed air to enter from the bottom of the waste resin intermediate bed 17, so as to realize the stirring of the waste resin and water in the waste resin intermediate bed 17;

[0049] Valve K14 is always closed, and is opened when the waste resin intermediate bed 17 needs desalted water to enter from the bottom of the waste resin intermediate bed 17, so as to realize the adjustment of the proportion of the waste resin and water in the waste resin intermediate bed 17;

[0050] Valve L15 is always closed, and is opened when the pipeline downstream of the transport pump C20 needs to be flushed;

[0051] Valve E7 is arranged on the pipeline at the inlet of the transport pump C20; the outlet of the transport pump C20 is connected with the decanter 18 through a pipeline, and valve F8, sight window 21 and valve G10 are arranged in sequence on the pipeline connecting the outlet of the transport pump C20 with the decanter 18;

[0052] The lower part of the decanter 18 is connected with the mobile waste resin transfer tank 19 through the hose 22, and a valve M16 is arranged between the hose 22 and the decanter 18; the valve M16 is normally closed and is opened when the waste resin in the decanter 18 is transported to the mobile waste resin transfer tank 19; the decanter 18 is used for centrifugal separation of waste resin and water, and the waste resin can be transported to the mobile waste resin transfer tank 19 through the valve M16 and the hose 22;

[0053] The upper end of the overflow pipe 25 is connected with the top of the waste resin transfer bed 17, and the lower end of the overflow pipe 25 is connected with the waste water collection system; the lower end of the overflow pipe 25 is also connected with the lower part of the sampling funnel 1 through a pipeline;

[0054] The valve B4 is also connected with one end of the valve D6 through a pipeline, and the other end of the valve D6 is connected with the low-level waste resin collection main pipe; the low-level waste resin collection main pipe is respectively provided with the valve C5 and the valve A3;

[0055] The top of the waste resin transfer bed 17 is also connected with the sampling valve 2 through a pipeline;

[0056] The waste water collection system is provided with a water seal 27; the water seal 27 is an S-shaped elbow structure as a whole, which is used for preventing gas in the waste liquid collection system from entering the device, and the sealing water is filled through the sampling funnel 1;

[0057] The valve B4 and the valve D6 are also connected with the valve H11 and the regulating door 9 in sequence through pipelines; the waste resin transfer bed 17 stores the temporarily cleaned waste resin to be cleaned;

[0058] The inlet end of the exhaust pipe 23 is connected with the top of the waste resin transfer bed 17, and the outlet end of the exhaust pipe 23 is connected with the sampling funnel 1, which is used for collecting the exhaust pipe hydrophobic;

[0059] The peep window 21 and the valve G10 are also connected with the valve L15 through a pipeline; the valve K14 and the valve L15 are connected to the desalted water pipeline through pipelines;

[0060] The delivery pump C20 is used for delivering the waste resin in the waste resin transfer bed 17;

[0061] The peep window 21 is used for observing the content of the waste resin in the output medium in the waste resin transfer bed 17;

[0062] The valve J13 is also connected to the compressed air pipeline through a pipeline; the delivery pump C20 is used for delivering the waste resin in the waste resin transfer bed 17; the valve J13 is normally closed, and when the waste resin transfer bed 17 needs compressed air, the compressed air enters from the bottom of the waste resin transfer bed 17 through the valve J13, so as to realize delivery and stirring of the waste resin in the waste resin transfer bed 17;

[0063] The sampling valve 2 is used to sample the medium in the waste resin transfer bed 17.

[0064] The mobile waste resin transfer tank 19 is used to receive clean waste resin from the decanter 18.

[0065] The valve I12 is normally closed, used to empty the waste resin transfer bed 17 of residual waste water by gravity.

[0066] The exhaust pipe 23 functions as a breathing exhaust, equalizing the pressure in the waste resin transfer bed 17 with the outside environment.

[0067] The overflow pipe 25 is used to overflow excess water to the waste liquid treatment system when the waste resin transfer bed 17 receives waste resin.

[0068] The mechanical filter 26 is used to filter waste resin particles in the overflow water, preventing waste resin from entering the waste liquid collection system.

[0069] The sampling valve 2 realizes sampling of the medium from the waste resin transfer bed 17.

[0070] The sampling funnel 1 is used to receive water from the exhaust pipe and the sampling valve, preventing the water from contaminating the equipment room floor.

[0071] The delivery pump C20 realizes the delivery of waste resin in the waste resin transfer bed 17.

[0072] A cleaning and control method for a low and non-radioactive waste resin cleaning and control device as described above, comprising the following steps:

[0073] Step one: when the nuclear power plant unloads non-radioactive waste resin, close the sampling valve 2, valve A3, valve E7, valve H11, valve I12, valve J13, valve K14 and valve L15, open valve B4, valve C5 and valve D6, and unload the waste resin to the waste resin transfer bed 17 by hydraulic delivery, when the waste resin transfer bed 17 has excess waste liquid, overflow through the overflow pipe 25 into the waste liquid collection system.

[0074] The amount of medium in the waste resin transfer bed 17 is observed by the liquid level gauge 24, and the single receiving volume of the waste resin transfer bed 17 is about 50% of its volume; the waste resin transfer bed volume can be designed according to the single receiving volume, for example, the single receiving waste resin volume is 2m 3 , then the volume of the waste resin transfer bed (17) should be ≥4m 3 .

[0075] The exhaust pipe 23 is connected to the room environment, ensuring that the waste resin transfer bed 17 is at normal pressure, and its outlet end is connected to the sampling funnel 1, used to collect the exhaust pipe drain.

[0076] Step two: when the waste resin receiving in the waste resin transfer bed 17 is completed, the proportion of waste resin and water in the waste resin transfer bed 17 is adjusted by the water drainage and water filling of the valve I12 and the valve K14; the waste resin and water are adjusted at a volume ratio of about 1:1, after the proportion of waste resin and water is adjusted, the valve J13 is opened for compressed air stirring, and after 2 to 8 minutes, the valve J13 is closed.

[0077] Step three: after the compressed air stirring is completed, the sampling valve 2, the valve A3, the valve C5, the valve D6, the valve G10, the valve I12, the valve J13, the valve K14 and the valve L15 are closed, the valve B4, the valve E7, the valve F8, the adjusting door 9 and the valve H11 are opened, the conveying pump C20 is started, after being stable, the sampling is taken through the sampling valve 2, and after the sampling is completed, the pump is stopped; the sample is analyzed.

[0078] Step four: if the sample analysis result in step three does not meet the cleaning control requirements, the valve J13 is opened for compressed air stirring, and after 2 to 8 minutes, the valve 13 is closed; after the stirring is completed, the sampling valve 2, the valve B4, the valve C5, the valve G10, the valve I12, the valve J13, the valve K14 and the valve L15 are closed, the valve A3, the valve D6, the valve E7, the valve F8, the adjusting door 9 and the valve H11 are opened, and the waste resin is conveyed from the waste resin transfer bed 17 to the low-level tank by the conveying pump C20.

[0079] If the sample analysis result in step three meets the cleaning control requirements, the valve J13 is opened for compressed air stirring, and after 2 to 8 minutes, the valve J13 is closed; after the stirring is completed, the sampling valve 2, the valve A3, the valve C5, the valve D6, the valve G10, the valve I12, the valve J13, the valve K14 and the valve L15 are closed, the valve B4, the valve E7, the valve F8, the adjusting door 9 and the valve H11 are opened, the conveying pump C20 is started, the valve G10 and the valve M16 are opened after being stable, the decanter 18 is started, the opening degree of the adjusting door 9 is adjusted, the flow into the decanter 18 meets the decanter flow requirement, the waste resin and water are centrifuged and dewatered in the decanter 18, the dewatered waste resin enters the waste resin movable transfer device 19, and meanwhile, the content of the waste resin in the pipeline is observed through the sight window 21, when only a small amount of waste resin passes through, the system is stopped, and the waste resin movable transfer device 19 moves to the control area, that is, the waste resin cleaning control operation is completed.

[0080] The radioactive waste resin cleaning control device of the application realizes the classified treatment of low-level waste resin and non-waste resin, avoids the non-waste resin and low-level waste resin, reduces the generation amount of radioactive waste resin in the operation of the nuclear power station, is beneficial to the minimization of radioactive waste, is safe and convenient to operate, and is therefore very practical.

[0081] The above detailed description of the embodiments of the present application is not intended to limit the present application to the above examples, and various changes can be made by those skilled in the art within the scope of knowledge of the present application without departing from the spirit of the present application.

Claims

1. A low-level and non-radioactive waste resin cleaning and control device, characterized in that include: Sampling funnel (1), sampling valve (2), valve A (3), valve B (4), valve C (5), valve D (6), valve E (7), valve F (8), regulating gate (9), valve G (10), valve H (11), valve I (12), valve J (13), valve K (14), valve L (15), valve M (16), waste resin transfer bed (17), decanter (18), mobile waste resin transfer tank (19), delivery pump C (20), peep window (21), hose (22), exhaust pipe (23), liquid level gauge (24), overflow pipe (25), mechanical filter (26), and several pipelines; The top of the waste resin transfer bed (17) is respectively provided with a valve B (4), a liquid level gauge (24), an exhaust pipe (23), a mechanical filter (26) and an overflow pipe (25); The bottom of the waste resin transfer bed (17) is connected to valve I (12), valve J (13) and valve K (14) through pipelines; the waste resin transfer bed (17) is also connected to the inlet of the delivery pump C (20) through a pipeline; A valve E (7) is provided on the pipeline at the inlet of the delivery pump C (20); the outlet of the delivery pump C (20) is connected to the decanter (18) through a pipeline, and a valve F (8), a peep window (21) and a valve G (10) are provided on the pipeline connecting the outlet of the delivery pump C (20) and the decanter (18) in sequence; The lower portion of the decanter (18) is connected to a mobile waste resin transfer tank (19) via a hose (22); a valve M (16) is also provided between the hose (22) and the decanter (18); The upper end of the overflow pipe (25) is connected to the top of the waste resin transfer bed (17), and the lower end of the overflow pipe (25) is connected to the wastewater collection system; the lower end of the overflow pipe (25) is also connected to the lower part of the sampling funnel (1) through a hose; The valve B (4) is also connected to one end of the valve D (6) through a pipeline, and the other end of the valve D (6) is connected to the low-level waste resin collection main pipe, on which the low-level waste resin collection main pipe is respectively provided with valve C (5) and valve A (3); the top of the waste resin transfer bed (17) is also connected to a sampling valve (2) through a pipeline.

2. The low-level and non-radioactive waste resin cleaning and control device according to claim 1, characterized in that: The wastewater collection system is provided with a water seal (27), which is an S-shaped elbow structure as a whole and is used to prevent gas from the wastewater collection system from entering the device. Sealing water is added through the sampling funnel (1).

3. The low-level and non-radioactive waste resin cleaning and control device according to claim 2, characterized in that: The valve B (4) and the valve D (6) are connected in sequence to a valve H (11) and a regulating gate (9) through pipelines; the waste resin transfer bed (17) stores waste resin to be temporarily cleaned and released.

4. The low-level and non-radioactive waste resin cleaning and control device according to claim 3, characterized in that: The inlet end of the exhaust pipe (23) is connected to the top of the waste resin transfer bed (17), and the outlet end of the exhaust pipe (23) is connected to the sampling funnel (1) for collecting exhaust pipe hydrophobicity.

5. The low-level and non-radioactive waste resin cleaning and control device according to claim 4, characterized in that: A valve L (15) is also connected between the peep window (21) and the valve G (10) via a pipeline; the valve K (14) and the valve L (15) are both connected to the desalted water pipeline via pipelines.

6. The low-level and non-radioactive waste resin cleaning and control device according to claim 5, characterized in that: The valve J (13) is also connected to a compressed air pipeline through a pipeline; the delivery pump C (20) is used to deliver the waste resin in the waste resin transfer bed (17).

7. The low-level and non-radioactive waste resin cleaning and control device according to claim 6, characterized in that: The sampling valve (2) is used to sample the material in the waste resin transfer bed (17); and the mobile waste resin transfer tank (19) is used to receive the cleaned and decontaminated resin from the decanter (18).

8. A cleaning and control method for the low-level and non-radioactive waste resin cleaning and control device according to any one of claims 1 to 7, characterized in that The steps include: Step 1: When the nuclear power plant unloads non-radioactive waste resin, the sampling valve (2), valve A (3), valve E (7), valve H (11), valve I (12), valve J (13), valve K (14) and valve L (15) are closed, and valve B (4), valve C (5) and valve D (6) are opened. The waste resin is unloaded to the waste resin transfer bed (17) through hydraulic conveying, and the excess waste liquid in the waste resin transfer bed (17) enters the waste liquid collection system through the overflow pipe (25); The amount of medium in the waste resin transfer bed (17) is observed by a liquid level meter (24), and the volume received by the waste resin transfer bed (17) at a single time is 50% of its volume; the exhaust pipe (23) is connected to the room environment to ensure that the waste resin transfer bed (17) is at normal pressure, and its outlet end is connected to the sampling funnel (1) for collecting the exhaust pipe water; Step 2: After the waste resin in the waste resin transfer bed (17) is completely received, the waste resin and water ratio in the waste resin transfer bed (17) is adjusted by draining and filling water through valve I (12) and valve K (14); the waste resin and water are adjusted to a volume ratio of 1:

1. After the waste resin and water ratio is adjusted, valve J (13) is opened to perform compressed air stirring, and the stirring is continued for 2 to 8 minutes, after which valve J (13) is closed. Step 3: After the compressed air stirring is completed, close the sampling valve (2), valve A (3), valve C (5), valve D (6), valve G (10), valve I (12), valve J (13), valve K (14) and valve L (15), open valve B (4), valve E (7), valve F (8), regulating gate (9), valve H (11), start the delivery pump C (20), wait for it to stabilize, take a sample through the sampling valve (2), and stop the pump after the sampling is completed; perform radioactivity analysis on the sample; Step 4: If the sample analysis results in step 3 do not meet the requirements for cleaning and release, open valve J (13) to stir with compressed air for 2 to 8 minutes and then close valve J (13); after stirring is completed, close sampling valve (2), valve B (4), valve C (5), valve G (10), valve I (12), valve J (13), valve K (14) and valve L (15), open valve A (3), valve D (6), valve E (7), valve F (8), regulating gate (9), valve H (11), and start transfer pump C (20) to transfer waste resin from waste resin transfer bed (17) to low-pressure tank; If the sample analysis results in step 3 meet the requirements for cleaning and release, open valve J (13) to stir with compressed air for 2 to 8 minutes and then close valve J (13); after stirring is completed, close sampling valve (2), valve A (3), valve C (5), valve D (6), valve G (10), valve M (16), valve I (12), valve J (13), valve K (14) and valve L (15), open valve B (4), valve E (7), valve F (8), regulating gate (9), valve H (11), start delivery pump C (20 ), after stabilization, open valve G (10) and valve M (16), put the decanter (18) into operation, adjust the opening of the regulating gate (9) so that the flow rate entering the decanter (18) meets the decanter flow rate requirement; the waste resin and water are centrifugally separated and dehydrated in the decanter (18), and the dehydrated waste resin enters the mobile waste resin transfer tank (19); at the same time, observe the content of the waste resin in the pipeline through the peep window (21), and when only a small amount of waste resin is visually observed to pass through, stop the system; the mobile waste resin transfer tank (19) is moved to the control area, and the waste resin cleaning and control operation is completed.

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