Radioactive solid waste treatment system

Abstract

The utility model relates to the technical field of radioactive waste treatment, in particular to a radioactive solid waste treatment system, which comprises a main conveying pipeline, a bypass conveying pipeline, a storage container, a conveying pump and a receiving container, the first inlet is communicated with the main conveying pipeline, an inlet of the conveying pump is communicated with the first outlet, an outlet of the conveying pump is communicated with the first inlet through a circulating pipeline, the receiving container is communicated with the outlet of the conveying pump and the bypass conveying pipeline, and the receiving container is communicated with the main conveying pipeline through a dewatering pipeline. The system is provided with the main conveying pipeline and the bypass conveying pipeline to prevent easy-to-deposit waste from blocking the storage container, the dewatering pipeline and the circulating pipeline are separately arranged, so that dewatering operation and medium conveying operation are performed at the same time, and radioactive solid waste conveying interruption caused by stopping of a conveying pump is avoided; the radioactive solid waste is deposited to block a transmission pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of radioactive waste treatment, in particular to a radioactive solid waste treatment system. Background Art

[0002] While nuclear fission generates huge amounts of energy, it also produces a large amount of radioactivity. This large amount of radioactivity will attach to the medium and form radioactive waste, which mainly includes three types: radioactive liquid waste, radioactive waste gas and radioactive solid waste.

[0003] Each unit is equipped with a radioactive solid waste treatment system to receive, store, and transport spent media such as spent resin, activated carbon, and zeolite from the chemical and volumetric control systems, spent fuel pool cooling system, and radioactive waste system. These media are hydraulically flushed to the radioactive solid waste treatment system's storage tanks for collection and storage. The radioactive solid waste in the storage tanks is hydraulically transferred to high-integrity containers (HICs) for further processing at the on-site waste treatment facility. However, this system still faces several operational issues: zeolite easily accumulates and clogs the storage tanks, forming compacted layers within them, rendering them inoperable. When the HIC reaches a high liquid level, it stops receiving water and begins dehydration. However, the HIC dehydration return line shares a common pipeline with the spent media circulation line, preventing simultaneous HIC dehydration and media transfer operations. This necessitates stopping the transfer pump, which causes solid waste to accumulate and clog the transfer pipeline, impacting the efficient transfer of radioactive solid waste. Therefore, a radioactive solid waste treatment system is urgently needed. Utility Model Content

[0004] The purpose of the utility model is to provide a radioactive solid waste treatment system to avoid solid waste deposition and blockage and improve the transportation efficiency of radioactive solid waste.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] Radioactive solid waste treatment system, including:

[0007] The main conveying pipeline and the bypass conveying pipeline are both used to convey waste media;

[0008] a storage container, wherein the storage container is provided with a first inlet and a first outlet, wherein the first inlet is in communication with the main delivery pipeline;

[0009] a delivery pump, wherein the inlet of the delivery pump is connected to the first outlet, and the outlet of the delivery pump is connected to the first inlet through a circulation pipeline;

[0010] A receiving container is connected to the outlet of the delivery pump and the bypass delivery pipeline, and the receiving container is connected to the main delivery pipeline through a dehydration pipeline.

[0011] Furthermore, the storage container is provided with a second inlet and a second outlet, and the radioactive solid waste treatment system also includes a mixing pump, the inlet of the mixing pump is connected to the second outlet through a first pipeline, and the outlet of the mixing pump is connected to the second inlet through a second pipeline.

[0012] Furthermore, a filter element is provided in the storage container, and the filter element is used to filter the waste medium flowing into the mixing pump.

[0013] Furthermore, an injection component is provided in the storage container, and the injection component includes a main pipe and a branch pipe that are interconnected. One end of the main pipe is connected to the second pipeline, and the other end is connected to the branch pipe. A nozzle is provided on the branch pipe, and the nozzle is arranged toward the bottom of the storage container.

[0014] Furthermore, a plurality of the nozzles are provided, and the plurality of nozzles are arranged at intervals along the extension direction of the branch pipe.

[0015] Furthermore, the radioactive solid waste treatment system further includes a damper, one end of which is connected to the gas source, and the other end of which is connected to the first pipeline.

[0016] Furthermore, the damper and the mixing pump are connected to the same air source.

[0017] Furthermore, the radioactive solid waste treatment system further comprises a flushing and dredging pipeline, one end of which is connected to the inlet of the delivery pump, and the other end of which is connected to the outlet of the delivery pump.

[0018] Furthermore, an emptying pipeline is provided at the bottom of the storage container, and the emptying pipeline is connected to the inlet of the delivery pump.

[0019] Furthermore, a first pneumatic valve is provided on the exhaust pipeline.

[0020] Beneficial effects of the utility model:

[0021] The utility model provides a radioactive solid waste treatment system, which includes a main conveying pipeline and a bypass conveying pipeline for conveying waste media, a storage container, a conveying pump, and a receiving container. The storage container is provided with a first inlet and a first outlet, the first inlet is connected to the main conveying pipeline, the inlet of the conveying pump is connected to the first outlet, the outlet of the conveying pump is connected to the first inlet via a circulation pipeline, the receiving container is connected to the outlet of the conveying pump and the bypass conveying pipeline, and the receiving container is connected to the main conveying pipeline via a dehydration pipeline. The system is provided with a main conveying pipeline and a bypass conveying pipeline to avoid clogging of the storage container by easily deposited waste. The dehydration pipeline and the circulation pipeline are provided separately, so that the dehydration operation and the medium transmission operation can be carried out simultaneously, avoiding the interruption of radioactive solid waste transmission caused by the stoppage of the conveying pump, which would cause the radioactive solid waste to deposit and block the transmission pipeline, thereby further improving the transportation efficiency of radioactive solid waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a radioactive solid waste treatment system provided by an embodiment of the present utility model;

[0023] Figure 2 It is a structural schematic diagram of the injection component provided by an embodiment of the utility model.

[0024] In the picture:

[0025] 1. Storage container; 11. First inlet; 12. First outlet; 13. Second inlet; 14. Second outlet; 15. Filter element; 16. Injection element; 161. Main pipe; 162. Branch pipe; 163. Nozzle; 2. Delivery pump; 3. Receiving container; 4. Mixing pump; 5. Damper; 6. Air filter;

[0026] 10. Main delivery pipeline; 20. Bypass delivery pipeline; 30. Circulation pipeline; 40. Dehydration pipeline; 50. First pipeline; 60. Second pipeline; 70. Flushing and dredging pipeline; 80. Drain pipeline;

[0027] 100, first pneumatic valve; 200, second pneumatic valve; 300, first isolation valve; 400, second isolation valve; 500, third isolation valve; 600, circulation isolation valve; 700, loading isolation valve; 800, dehydration isolation valve; 900, cleaning port isolation valve. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0032] It should also be noted that, in the description of this utility model, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0034] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0035] The following combination Figure 1-Figure 2 The technical solution of the utility model is further illustrated through specific implementation methods.

[0036] When a nuclear power plant processes radioactive solid waste, in order to prevent the radioactive solid waste from sedimentation and blockage and improve the transportation efficiency of the radioactive solid waste, an embodiment of the present invention provides a radioactive solid waste treatment system, which includes a main conveying pipeline 10 and a bypass conveying pipeline 20 for conveying waste media, a storage container 1, a conveying pump 2 and a receiving container 3. The storage container 1 is provided with a first inlet 11 and a first outlet 12. The first inlet 11 is connected to the main conveying pipeline 10, the inlet of the conveying pump 2 is connected to the first outlet 12, and the outlet of the conveying pump 2 is connected to the first inlet 11 through a circulation pipeline 30. The receiving container 3 is connected to the outlet of the conveying pump 2 and the bypass conveying pipeline 20. The receiving container 3 is connected to the main conveying pipeline 10 through a dehydration pipeline 40.

[0037] In detail, the radioactivity generated by nuclear fission is adsorbed by media such as resin, activated carbon and natural zeolite to form radioactive solid waste. In the treatment of radioactive solid waste, natural zeolite has low strength, high viscosity and is easy to deposit. It is directly transported to the receiving container 3 through the bypass conveying pipeline 20, avoiding the zeolite from clogging the first inlet 11 on the storage container 1. Other waste media are first transported to the storage container 1 through the main conveying pipeline 10 for collection and storage decay. When radioactive solid waste needs to be transferred and processed, first isolation valve 300 is opened, and the radioactive solid waste in storage container 1 is transferred to receiving container 3 via transfer pump 2. Once receiving container 3 reaches its maximum liquid level, filling isolation valve 700 is closed to stop receiving waste, and dehydration isolation valve 800 is opened for dehydration. Water in receiving container 3 is transferred via dehydration pipeline 40 to main transfer pipeline 10 and into storage container 1, providing a liquid medium for transferring the radioactive solid waste in storage container 1. Simultaneously, circulation isolation valve 600 is opened, and radioactive solid waste enters storage container 1 via circulation pipeline 30. Separate dehydration pipeline 40 and circulation pipeline 30 allow for simultaneous dehydration and medium transfer operations, enabling continuous transfer by transfer pump 2. This prevents interruptions in radioactive solid waste transfer caused by transfer pump 2 cessation, which could result in radioactive solid waste accumulation and clogging the transfer pipeline. When receiving container 3 is full, it is transported to the on-site waste treatment facility for centralized treatment, and a new receiving container 3 is used in the radioactive solid waste treatment system. The radioactive solid waste treatment system effectively avoids the sedimentation and blockage of radioactive solid waste and improves the transportation efficiency of radioactive solid waste.

[0038] Optionally, receiving container 3 utilizes a high-integrity container (HIC). HICs offer high reliability and performance, ensuring the safety and integrity of radioactive solid waste during storage, transportation, and disposal, while reducing radiation exposure to the environment and humans. HICs are currently available and will not be further described here.

[0039] To further prevent the radioactive solid waste from compacting in storage container 1, the radioactive solid waste treatment system also includes a mixing pump 4. Storage container 1 is provided with a second inlet 13 and a second outlet 14. The inlet of mixing pump 4 communicates with the second outlet 14 via a first pipeline 50, and the outlet of mixing pump 4 communicates with the second inlet 13 via a second pipeline 60. Before transferring and processing the radioactive solid waste, mixing pump 4 and second isolation valve 400 are first opened, allowing the liquid medium in storage container 1 to enter mixing pump 4 via the first pipeline 50. The liquid medium is then returned to storage container 1 via the second pipeline 60 after the third isolation valve 500 is opened. This allows the liquid medium flowing out of mixing pump 4 to fully mix with the radioactive solid waste in storage container 1, preventing compaction of the radioactive solid waste from clogging first outlet 12.

[0040] Furthermore, a filter element 15 is provided within storage container 1 to filter the waste medium flowing into mixing pump 4. Specifically, filter element 15 is positioned at the inlet of first pipeline 50, allowing mixing pump 4 to extract the liquid medium from storage container 1 and return it to storage container 1, achieving thorough mixing of the radioactive solid waste and the liquid medium. In this embodiment, filter element 15 is approximately 910 mm long, which increases the flow rate of the liquid medium. Furthermore, filter element 15 is positioned away from the bottom of storage container 1, preventing clogging of filter element 15 due to the dense concentration of liquid at the bottom of storage container 1.

[0041] Furthermore, if Figure 2 As shown, the storage container 1 is also provided with a spray element 16. The spray element 16 is disposed at the outlet of the second pipeline 60 and is capable of spraying the liquid medium flowing out of the mixing pump 4 toward the radioactive solid waste within the storage container 1, thereby enhancing the mixing effect. Specifically, the spray element 16 comprises a main pipe 161 and a branch pipe 162, which are interconnected. One end of the main pipe 161 is connected to the second pipeline 60, and the other end is connected to the branch pipe 162. The branch pipe 162 is provided with a nozzle 163, which is positioned toward the bottom of the storage container 1. In this embodiment, two branch pipes 162 are provided. The two branch pipes 162 are arranged perpendicularly in the horizontal direction, while the main pipe 161 is arranged in the vertical direction. The main pipe 161 and the two branch pipes 162 are mutually perpendicular. A nozzle 163 is provided at each end of each branch pipe 162. The liquid medium flows from the main pipe 161 to the branch pipe 162, and then is sprayed by the nozzle 163 toward the radioactive solid waste, thereby achieving uniform mixing of the liquid medium and the radioactive solid waste.

[0042] Optionally, a plurality of nozzles 163 are provided, and the plurality of nozzles 163 are spaced apart along the extension direction of the branch pipe 162 . The plurality of nozzles 163 can increase the flow rate of the liquid medium and enhance the mixing effect.

[0043] Furthermore, the second pipeline 60 is connected to the wastewater treatment system. When the liquid level in the storage container 1 is high, the isolation valve on the pipeline between the wastewater treatment system and the second pipeline 60 is opened, and part of the liquid medium flowing out of the mixing pump 4 flows to the wastewater treatment system, thereby ensuring the normal operation of the system.

[0044] The radioactive solid waste treatment system also includes a damper 5 , one end of which is connected to the air source and the other end to the end of the first pipeline 50 near the mixing pump 4. The damper 5 reduces pipeline vibration and noise, improving system safety and maintaining a stable flow rate. The damper 5 is conventional and will not be described in detail here. Optionally, the mixing pump 4 and the damper 5 can be connected to the same compressed air equipment and utilize the same air source, thereby improving the operational stability of the mixing pump 4.

[0045] In this embodiment, an air filter 6 is provided on the air supply pipeline connecting the compressed air equipment with the mixing pump 4 and the damper 5, which can filter the compressed air flowing into the mixing pump 4 and the damper 5, further improving the stability of the operation of the mixing pump 4.

[0046] Furthermore, the radioactive solid waste treatment system also includes a flushing and unblocking pipeline 70. One end of the flushing and unblocking pipeline 70 is connected to the inlet of the delivery pump 2, providing flushing water while the radioactive solid waste is being transported, thereby increasing the reliability of the transport. The other end of the flushing and unblocking pipeline 70 is connected to the outlet of the delivery pump 2. After the radioactive solid waste is transported, the isolation valve on the end of the flushing and unblocking pipeline 70 connected to the outlet of the delivery pump 2 is opened to flush the transmission pipeline and prevent the radioactive solid waste from accumulating and clogging the transmission pipeline. Optionally, the isolation valve on the end of the flushing and unblocking pipeline 70 connected to the outlet of the delivery pump 2 is a second pneumatic valve 200. The use of a pneumatically controlled valve enables remote control of the flushing of the transmission pipeline, thereby improving the system's remote flushing capabilities. In this embodiment, the pipeline flushing uses desalted water, which can absorb waste impurities such as suspended matter in the transmission pipeline, preventing waste accumulation in the transmission pipeline.

[0047] To clear easily clogged areas in the transmission pipeline, a purge port is provided on the pipeline connecting the delivery pump 2 and the storage container 1. This port allows waste to be cleared from the pipeline. Furthermore, a purge port isolation valve 900 is provided at the purge port to prevent the release of radioactive media during the dredging process, ensuring operator safety.

[0048] Furthermore, a drain line 80 is provided at the bottom of the storage container 1. This drain line 80 communicates with the inlet of the delivery pump 2 and is used to drain all radioactive solid waste from the storage container 1. A first pneumatic valve 100 is provided on the drain line 80, which allows for remote control of the emptying function of the storage container 1. Furthermore, the first pneumatic valve 100, which is provided on the connection line between the delivery pump 2 and the storage container 1, can also control the flushing function of the transmission line, eliminating the risk of occupational exposure to operators.

[0049] In this embodiment, the radioactive solid waste treatment system is provided with two storage containers 1, both of which are connected to the main delivery pipeline 10 and the delivery pump 2, ensuring storage space for a large amount of radioactive solid waste and improving the stability of system operation.

[0050] In order to prevent sedimentation and clogging during the transmission of radioactive solid waste, the proportion of small activated carbon particles in the adsorption medium is reduced, the strength of the small activated carbon particles is increased, and clogging of the injection member 16 and the filter member 15 in the storage container 1 is avoided.

[0051] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Radioactive solid waste treatment system, characterized in that: include: The main conveying pipeline (10) and the bypass conveying pipeline (20) are both used to convey the waste medium; A storage container (1), wherein the storage container (1) is provided with a first inlet (11) and a first outlet (12), and the first inlet (11) is in communication with the main delivery pipeline (10); a delivery pump (2), wherein the inlet of the delivery pump (2) is in communication with the first outlet (12), and the outlet of the delivery pump (2) is in communication with the first inlet (11) via a circulation line (30); A receiving container (3) is connected to the outlet of the delivery pump (2) and the bypass delivery pipeline (20). The receiving container (3) is connected to the main delivery pipeline (10) through a dehydration pipeline (40).

2. The radioactive solid waste treatment system according to claim 1, characterized in that: The storage container (1) is further provided with a second inlet (13) and a second outlet (14). The radioactive solid waste treatment system further comprises a mixing pump (4). The inlet of the mixing pump (4) is communicated with the second outlet (14) via a first pipeline (50), and the outlet of the mixing pump (4) is communicated with the second inlet (13) via a second pipeline (60).

3. The radioactive solid waste treatment system according to claim 2, characterized in that: A filter element (15) is provided in the storage container (1), and the filter element (15) is used to filter the waste medium flowing into the mixing pump (4).

4. The radioactive solid waste treatment system according to claim 2, characterized in that: The storage container (1) is provided with an injection member (16), the injection member (16) comprising a main pipe (161) and a branch pipe (162) that are connected to each other, one end of the main pipe (161) being connected to the second pipeline (60), and the other end being connected to the branch pipe (162), a nozzle (163) being provided on the branch pipe (162), and the nozzle (163) being arranged toward the bottom of the storage container (1).

5. The radioactive solid waste treatment system according to claim 4, characterized in that: A plurality of the nozzles (163) are provided, and the plurality of nozzles (163) are arranged at intervals along the extending direction of the branch pipe (162).

6. The radioactive solid waste treatment system according to claim 2, characterized in that: The radioactive solid waste treatment system further comprises a damper (5), one end of the damper (5) being in communication with the gas source, and the other end of the damper (5) being in communication with the first pipeline (50).

7. The radioactive solid waste treatment system according to claim 6, characterized in that: The damper (5) and the mixing pump (4) are connected to the same gas source.

8. The radioactive solid waste treatment system according to claim 1, characterized in that: The radioactive solid waste treatment system further comprises a flushing and unblocking pipeline (70), one end of which is in communication with the inlet of the delivery pump (2), and the other end of which is in communication with the outlet of the delivery pump (2).

9. The radioactive solid waste treatment system according to claim 1, characterized in that: The bottom of the storage container (1) is provided with an emptying pipeline (80), and the emptying pipeline (80) is communicated with the inlet of the delivery pump (2).

10. The radioactive solid waste treatment system according to claim 9, characterized in that: The exhaust pipeline (80) is provided with a first pneumatic valve (100).

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