A radioactive waste resin dehydration metering feeding device

Abstract

The present invention relates to a radioactive waste resin dehydration metering feeding device, which belongs to the technical field of radioactive waste treatment. The device comprises a lead shielding sealed container, the upper end of which is connected to the upper and lower ends of a metering tank through a waste conveying pipeline and a free water conveying pipeline respectively; the upper end of the metering tank is also connected to the air inlet of a water ring vacuum pump through a vacuum pipeline, and under the negative pressure formed by the water ring vacuum pump, the waste resin and free water in the lead shielding sealed container are transported to the metering tank through the waste conveying pipeline; the upper end of the metering tank is connected to a compressed air pipeline, and the free water in the waste resin is filtered out by pressure under the pneumatic action of compressed air; the bottom of the metering tank is connected to a waste resin treatment system, and the dehydrated waste resin is transported to the waste resin treatment system under the pneumatic action of compressed air. The present invention can transport the waste resin to the metering tank, and after dehydration and metering, it is sent to a subsequent treatment device, which can solve the problem of waste resin transportation and metering feeding.

Description

Technical Field

[0001] The invention belongs to the technical field of radioactive waste treatment, and in particular relates to a radioactive waste resin dehydration metering feeding device. Background Art

[0002] The safe disposal of radioactive waste resin containing organic matter is one of the difficulties and hot spots in the current domestic radioactive waste management. Radioactive waste resin generated by nuclear facility operation is collected in waste resin storage tanks / tanks, and the waste resin usually contains a large amount of free water.

[0003] At present, China is conducting research on inorganic reduction technology and equipment for radioactive waste resin, including wet oxidation, supercritical water oxidation, steam reforming, etc. These treatment processes all involve retrieving the waste resin from the storage tank / tank and transporting it to the vicinity of the disposal device, and then dehydrating and metering the waste resin according to the feeding needs and transporting it to the treatment device. At present, there is no relevant waste resin dehydration metering feeding device in China. Summary of the invention

[0004] In order to solve the defects of the prior art, the purpose of the present invention is to provide a radioactive waste resin dehydration and metering device, through which the waste resin can be transported to a metering tank, and after dehydration and metering, it is sent to a subsequent processing device, which can solve the problem of waste resin transportation, metering and feeding.

[0005] In order to achieve the above purpose, a technical solution adopted by the present invention is:

[0006] A radioactive waste resin dehydration metering device, comprising a lead shielding sealed container for transporting waste resin, a metering tank and a water ring vacuum pump for providing negative pressure, wherein the upper end of the lead shielding sealed container is connected with a waste conveying pipeline and a free water conveying pipeline, the other end of the waste conveying pipeline is connected with the upper end of the metering tank, and the other end of the free water conveying pipeline is connected with the lower end of the metering tank;

[0007] The upper end of the metering tank is also connected to a vacuum pipeline, the other end of which is connected to the air inlet of the water ring vacuum pump, the water inlet and the exhaust port of the water ring vacuum pump are connected to a water tank, and under the negative pressure formed by the water ring vacuum pump, the waste resin and free water in the lead shielding sealed container are transported to the metering tank through the waste conveying pipeline;

[0008] The upper end of the metering tank is also connected to a compressed air pipeline, through which external compressed air enters the metering tank, and free water in the waste resin is filtered out by the pneumatic force of the compressed air, and the free water removed is transported to the lead shielding sealed container through the free water transport pipeline;

[0009] The bottom of the metering tank is communicated with a waste resin processing system, and the dehydrated waste resin is transported to the waste resin processing system under the pneumatic action of compressed air.

[0010] Furthermore, in the above-mentioned radioactive waste resin dehydration metering device, a weighing module is provided on the upper part of the metering tank for real-time monitoring of the weight of the metering tank, and judging the weight of the waste resin in the metering tank according to the change of the indication of the weighing module.

[0011] Furthermore, in the radioactive waste resin dehydration metering device as described above, valves are provided on the waste conveying pipeline near the upper end of the lead shielding sealed container and the upper end of the metering tank; valves are provided on the free water conveying pipeline near the upper end of the lead shielding sealed container and the lower end of the metering tank.

[0012] Furthermore, in the above-mentioned radioactive waste resin dehydration metering device, valves are provided on the vacuum pipeline near the upper end of the metering tank and near the air inlet of the water ring vacuum pump.

[0013] Furthermore, in the above-mentioned radioactive waste resin dehydration metering device, filter screens are provided at both ends of the free water delivery pipeline.

[0014] Furthermore, according to the radioactive waste resin dehydration metering device as described above, an aerosol filtration pipe is also provided at the upper end of the lead shielding sealed container, and a first filter is provided on the aerosol filtration pipe. The radioactive aerosol generated by the waste resin in the lead shielding sealed container is filtered through the first filter and then discharged into the air.

[0015] Furthermore, in the radioactive waste resin dehydration metering device as described above, a level meter is also provided at the upper end of the lead shielding sealed container, and a probe of the level meter is inserted into the lead shielding sealed container for real-time monitoring of the liquid level of the waste resin in the lead shielding sealed container.

[0016] Furthermore, in the above-mentioned radioactive waste resin dehydration metering device, an exhaust pipe is provided at the upper end of the water tank, and a second filter is provided on the exhaust pipe. The radioactive aerosol generated by the contaminated water in the water tank is filtered through the second filter and then discharged into the air.

[0017] Furthermore, in the above-mentioned radioactive waste resin dehydration metering device, the lower part of the water tank is connected to a waste liquid treatment system for discharging the contaminated water in the water tank after treating it to meet the regulations.

[0018] Furthermore, in the radioactive waste resin dehydration metering device as described above, a glass window is respectively provided on the aerosol filtration pipe, the waste conveying pipe and the free water conveying pipe at the upper end of the lead shielding sealed container, and the conveying conditions of the mixed suspended materials of the waste resin and free water in each pipe are observed through the glass window.

[0019] The radioactive waste resin dehydration metering device of the present invention has the following significant technical effects:

[0020] 1) The process and device provided by the present invention are not affected by the type of waste resin and the free water content, and can achieve rapid transportation, dehydration and accurate metering of radioactive waste resin.

[0021] 2) The device provided by the present invention can realize the rapid transportation, dehydration, metering and feeding of radioactive waste resin under closed conditions, can prevent radioactive leakage, and has good radiation protection function.

[0022] 3) The device provided by the present invention can be used in conjunction with a waste resin inorganic treatment system, and has obvious economy, safety and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a radioactive waste resin dehydration metering device provided in a specific embodiment of the present invention;

[0024] In the figure, 1-lead shielding sealed container; 2-filter screen; 3-first filter; 4-metering tank; 5-weighing module; 6-water ring vacuum pump; 7-water tank; 8-second filter; 9-level meter; 10-glass window. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with specific embodiments and the accompanying drawings.

[0026] Figure 1 The radioactive waste resin dehydration metering device provided in a specific embodiment of the present invention is shown. As can be seen from the figure, the device mainly includes a lead shielding sealed container 1, a metering tank 4 and a water ring vacuum pump 6 for transporting waste resin. The upper end of the lead shielding sealed container 1 is connected with a waste conveying pipeline and a free water conveying pipeline, the other end of the waste conveying pipeline is connected with the upper end of the metering tank 4, and the other end of the free water conveying pipeline is connected with the lower end of the metering tank 4; the upper end of the metering tank 4 is also connected with a vacuum pipeline, the other end of the vacuum pipeline is connected to the air inlet of the water ring vacuum pump 6, and the water inlet and exhaust port of the water ring vacuum pump 6 are connected to a water tank 7; the upper end of the metering tank 4 is also connected to a compressed air pipeline, and a valve V6 is provided on the compressed air pipeline. External compressed air enters the metering tank 4 through the compressed air pipeline, and the free water in the waste resin is filtered out by pressure, and the dehydrated waste resin is transported to the waste resin treatment system.

[0027] The water ring vacuum pump 6 forms negative pressure in each pipeline. Under the action of negative pressure, the waste resin and free water in the lead shielding sealed container 1 are transported to the metering tank 4 through the waste material conveying pipeline; the free water drained from the waste resin in the metering tank 4 is then transported to the lead shielding sealed container 1 through the free water conveying pipeline.

[0028] The metering tank 4 has a conical structure, and the bottom is connected to the valve V8 and the waste resin processing system. The dehydrated waste resin is transported to the waste resin processing system under the pneumatic action of compressed air.

[0029] A weighing module 5 is provided on the upper portion of the metering tank 4 for real-time monitoring of the weight of the metering tank 4 and determining the weight of the waste resin in the metering tank 4 according to changes in the indicated value.

[0030] A valve V2 is provided on the waste conveying pipeline near the upper end of the lead shielding sealed container 1, and a valve V4 is provided near the upper end of the metering tank 4; a valve V3 is provided on the free water conveying pipeline near the upper end of the lead shielding sealed container 1, and a valve V7 is provided near the lower end of the metering tank 4.

[0031] A valve V5 is provided on the vacuum pipeline near the upper end of the metering tank 4 , a valve V9 is provided near the air inlet of the water ring vacuum pump 6 , and a valve V10 is provided on the water inlet pipeline of the water ring vacuum pump 6 .

[0032] Filter screens 2 are provided at both ends of the free water delivery pipeline to intercept waste resin particles.

[0033] An aerosol filtration pipeline is also provided at the upper end of the lead shielding sealed container 1, on which a valve V1 and a first filter 3 are sequentially provided. The radioactive aerosol generated by the waste resin in the lead shielding sealed container 1 is filtered through the first filter 3 and then discharged into the air.

[0034] A material level meter 9 is also provided at the upper end of the lead shielding sealed container 1. The probe of the material level meter 9 is inserted into the lead shielding sealed container 1 for real-time monitoring of the liquid level of the waste resin in the lead shielding sealed container 1 and providing an alarm function.

[0035] An exhaust pipe is provided at the upper end of the water tank 7, on which a valve V11 and a second filter 8 are provided. The clean water in the water tank 7 will be contaminated by waste resin after being used for a period of time, and the radioactive aerosol generated by the contaminated water in the water tank 7 can be filtered by the second filter 8 and discharged into the air.

[0036] The upper and lower parts of the water tank 7 are connected to the waste liquid treatment system through two pipelines. A valve V12 is provided on the upper pipeline. When the liquid level in the water tank reaches a high level, the valve V12 is controlled to open to discharge excess water into the waste liquid treatment system. A valve V13 is provided on the lower pipeline to control the discharge of all polluted water in the water tank 7 into the waste liquid treatment system.

[0037] A glass window 10 is provided on the aerosol filtering pipe, the waste conveying pipe and the free water conveying pipe at the upper end of the lead shielding sealed container 1, through which the conveying conditions of the mixed suspended materials of the waste resin and free water in each pipe can be observed.

[0038] The process flow of using the above-mentioned radioactive waste resin dehydration metering device to carry out waste resin dehydration metering feeding is as follows:

[0039] 1) Waste resin transportation: under the action of negative pressure, the waste resin and free water in the lead shielding sealed container 1 are transported to the metering tank 4.

[0040] Specific implementation steps: Before the waste resin is retrieved, open valves v1, v2, v4, v5, v9 and v10, and close valves v3, v6, v7 and v8. Turn on the water ring vacuum pump 6 to form a negative pressure inside. When the negative pressure in the metering tank 4 reaches a certain value, the waste resin and free water in the lead shielding sealed container 1 are transported into the metering tank 4 through the pipeline and valves v2 and v4 under negative pressure. The transportation of the mixed suspended material of the waste resin and free water can be observed through the glass window 10. The weighing module 5 controls the delivery amount of the waste resin.

[0041] 2) Dehydration of waste resin: The free water entering the metering tank 4 is filtered out by compressed air.

[0042] Specific implementation steps: close valves v4 and v5, open valves v1, v3 and v7, and then intermittently open valve v6, and the free water in the metering tank 4 is discharged from valve v7 under the action of compressed air. When the weighing module indication is stable, close valve v6 and the dehydration process ends.

[0043] 3) Waste resin measurement: The waste resin is measured by weighing method.

[0044] Specific implementation steps: The weighing module 5 monitors the metering tank 4 in real time throughout the whole process, and determines the weight of the waste resin according to the change of the indicated value.

[0045] 4) Waste resin feeding: The dehydrated and metered waste resin is transported to the waste resin treatment system.

[0046] Specific implementation steps: close valves v4, v5 and v7, open valve v8, and then open valve v6, and the waste resin in the metering tank 4 is transported to the waste resin treatment system under the action of compressed air.

[0047] The radioactive waste resin dehydration metering device provided by the present invention uses a negative pressure hydraulic conveying method to convey the waste resin and free water from the transfer container to the metering container, and then uses compressed air to filter and leach the free water in the metering tank. The dehydrated waste resin is volume / mass measured and then sent to the waste resin treatment system. The process and device provided by the present invention are not affected by the type of waste resin and the free water content, and can achieve rapid transportation, dehydration and accurate metering of radioactive waste resin; because the rapid transportation, dehydration, metering and feeding of radioactive waste resin are achieved under closed conditions, radioactive leakage can be prevented, and it has good radiation protection function. The device provided by the present invention can be used in conjunction with the waste resin inorganic treatment system, and has obvious economy, safety and application prospects.

[0048] The above embodiments are merely illustrative of the present invention, and the present invention may also be implemented in other specific ways or other specific forms without departing from the gist or essential features of the present invention. Therefore, the described embodiments should be considered illustrative rather than restrictive in any respect. The scope of the present invention should be described by the appended claims, and any changes equivalent to the intent and scope of the claims should also be included within the scope of the present invention.

Claims

1. A radioactive waste resin dehydration metering device, characterized in that: The device comprises a lead shielding sealed container (1) for transporting waste resin, a metering tank (4) and a water ring vacuum pump (6) for providing negative pressure, wherein the upper end of the lead shielding sealed container (1) is connected to a waste conveying pipeline and a free water conveying pipeline, the other end of the waste conveying pipeline is connected to the upper end of the metering tank (4), and the other end of the free water conveying pipeline is connected to the lower end of the metering tank (4); The upper end of the metering tank (4) is also connected to a vacuum pipeline, the other end of which is connected to the air inlet of the water ring vacuum pump (6), the water inlet and the exhaust port of the water ring vacuum pump (6) are connected to a water tank (7), and under the negative pressure formed by the water ring vacuum pump (6), the waste resin and free water in the lead shielding sealed container (1) are transported to the metering tank (4) through the waste transport pipeline; The upper end of the metering tank (4) is also connected to a compressed air pipeline, through which external compressed air enters the metering tank (4), and under the action of the compressed air, free water in the waste resin is filtered out by pressure, and the filtered free water is transported to the lead shielding sealed container (1) through the free water transport pipeline; The bottom of the metering tank (4) is connected to a waste resin processing system, and the dehydrated waste resin is transported to the waste resin processing system under the pneumatic action of compressed air.

2. The radioactive waste resin dehydration metering device according to claim 1, characterized in that: A weighing module (5) is arranged on the upper part of the metering tank (4) for monitoring the weight of the metering tank (4) in real time and judging the weight of the waste resin in the metering tank (4) according to the change of the indication value of the weighing module (5).

3. The radioactive waste resin dehydration metering device according to claim 2, characterized in that: Valves are provided on the waste conveying pipeline near the upper end of the lead shielding sealed container (1) and the upper end of the metering tank (4); valves are provided on the free water conveying pipeline near the upper end of the lead shielding sealed container (1) and the lower end of the metering tank (4).

4. The radioactive waste resin dehydration metering device according to claim 3, characterized in that: Valves are provided on the vacuum pipeline near the upper end of the metering tank (4) and near the air inlet of the water ring vacuum pump (6).

5. The radioactive waste resin dehydration metering device according to any one of claims 1 to 4, characterized in that: Filter screens (2) are provided at both ends of the free water delivery pipeline.

6. The radioactive waste resin dehydration metering device according to claim 1, characterized in that: An aerosol filter pipe is also provided at the upper end of the lead shielding sealed container (1), and a first filter (3) is provided on the aerosol filter pipe. The radioactive aerosol generated by the waste resin in the lead shielding sealed container (1) is filtered through the first filter (3) and then discharged into the air in compliance with regulations.

7. The radioactive waste resin dehydration metering device according to claim 6, characterized in that: A material level meter (9) is also provided at the upper end of the lead shielding sealed container (1), and a probe of the material level meter (9) is inserted into the lead shielding sealed container (1) for real-time monitoring of the liquid level of the waste resin in the lead shielding sealed container (1).

8. The radioactive waste resin dehydration metering device according to claim 7, characterized in that: An exhaust pipe is provided at the upper end of the water tank (7), and a second filter (8) is provided on the exhaust pipe. The radioactive aerosol generated by the contaminated water in the water tank (7) is filtered through the second filter (8) and then discharged into the air in compliance with regulations.

9. The radioactive waste resin dehydration metering device according to claim 8, characterized in that: The lower part of the water tank (7) is connected to a waste liquid treatment system for treating the polluted water in the water tank (7) and discharging it after it meets the regulations.

10. The radioactive waste resin dehydration metering device according to any one of claims 6 to 9, characterized in that: A glass window (10) is provided on each of the aerosol filtration pipeline, the waste material conveying pipeline and the free water conveying pipeline at the upper end of the lead shielding sealed container (1), and the conveying conditions of the mixed suspended materials of the waste resin and free water in each pipeline can be observed through the glass window (10).

Images