Nuclear power plant cold source net bag automatic cleaning device and cleaning process thereof

Abstract

The invention belongs to the field of garbage cleaning, and provides a nuclear power plant cold source net bag automatic cleaning device which comprises a plurality of collecting net bags arranged in seawater, the wide opening of one end of each collecting net bag extends to the bottom of the ocean, a plurality of pile foundations are arranged close to the narrow opening of the other end of each collecting net bag, and suction pumps are installed on the upper surfaces of the pile foundations. A plurality of suction pipes are arranged on the outer surface of the suction pump side by side, a supporting net cover is clamped to the inner wall of a narrow opening of the collecting net bag, a supporting hose is installed between the suction pipes and the supporting net cover, and fastening devices capable of being quickly disassembled are arranged at the two ends of the supporting hose and used for connecting the suction pipes and the supporting net cover to the two ends of the supporting hose respectively. Through wide-mouth interception of the collecting net bag and active suction of the suction pump, marine litter and organisms in a cold source water taking area can be rapidly cleaned, blockage of pipelines and equipment of a cold source system is reduced, stable conveying of a cooling medium is guaranteed, and the operation safety of a nuclear power plant is improved.

Description

Technical Field

[0001] This invention belongs to the field of waste disposal, specifically an automatic cleaning device for cold source mesh bags in nuclear power plants and its cleaning process. Background Technology

[0002] The cooling source system in a nuclear power plant is a water-based system that provides cooling to the nuclear reactor and related equipment. Seawater is typically used as the cooling medium (e.g., in a circulating water system). Its working principle is as follows: seawater is pumped in, flows through heat exchangers to remove the heat generated by the nuclear equipment, and then the heated seawater is discharged back into the ocean. The cooling source system is a crucial component ensuring the safe and stable operation of a nuclear power plant. If the supply of the cooling medium is obstructed or the heat exchange efficiency decreases, it may lead to overheating of the equipment and even threaten nuclear safety.

[0003] Because seawater naturally contains a large number of marine organisms (such as small fish, shellfish, seaweed, jellyfish, etc.) and marine debris generated by human activities (such as plastic fragments, fishing net remnants, floating objects, etc.), when the cold source system draws seawater, these substances will enter the system along with the water flow. These substances will not only adhere to or entangle on the inner wall of the pipes and the surface of the heat exchanger tube bundle, causing the pipe diameter to shrink, the seawater flow rate to decrease, and the heat exchange efficiency to drop, but may even cause safety hazards such as water pump blockage and equipment damage. In addition, a large number of marine organisms will die during the extraction process due to water flow impact, compression and high temperature, which will disrupt the near-shore food chain, threaten the survival of endangered species, and have a serious impact on the marine ecological environment. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides an automatic cleaning device and cleaning process for the cold source net of a nuclear power plant, which solves the problem of marine organisms and marine debris being sucked in together when the cold source system draws seawater in the prior art.

[0005] An automatic cleaning device for cold source nets in nuclear power plants includes several collection nets set in seawater. One end of each collection net has a wide opening that extends to the seabed, and several pile foundations are set near the narrow opening of the other end of each collection net. A suction pump is installed on the upper surface of each pile foundation, and multiple suction pipes are arranged side by side on the outer surface of the suction pump. A support net cover is snapped into the inner wall of the narrow opening of each collection net, and a support hose is installed between the suction pipes and the support net cover.

[0006] Both ends of the support hose are equipped with quick-release fastening devices for connecting the suction tube and the support mesh cover to the two ends of the support hose, respectively.

[0007] An on-site collection box is installed at the external sewage outlet of the suction pump. Multiple suction pumps are also equipped with a main conveying pipe. One end of the main conveying pipe extends to the shore base and is connected to a shore base collection device for the separation of garbage and organisms and environmental protection treatment.

[0008] The outer surface of the pile foundation is also provided with an anchoring structure to stably support the pile foundation in seawater.

[0009] Preferably, the fastening device includes a connector, which is fixedly installed on both sides of the outer surface of the support hose. A first fastener and a second fastener are hinged to each other on the outer surface of the connector. A movable rod is rotatably installed on one side of the second fastener via a bearing. A limit clamp is provided on the outer surface of the movable rod. A limit groove is provided on one side of the first fastener at the position corresponding to the movable rod.

[0010] Preferably, the anchoring structure includes a plurality of No. 1 connecting ropes, which are respectively set at the four corners of the bottom end of the pile foundation, and one end of the No. 1 connecting rope extends to the seabed and is provided with a first anchor head.

[0011] Preferably, the upper surface of the collection net is provided with a plurality of hollow floats at intervals along its edge.

[0012] Preferably, a second anchor head is provided at the bottom of the wide opening of one end of the collection net, which extends to the seabed; a second connecting rope is installed at the top of the wide opening of one end of the collection net, which is positioned at the sea surface; and a third anchor head is provided at one end of the second connecting rope, which extends to the seabed.

[0013] Preferably, both the first fastener and the second fastener have a fixing groove on one side of their inner wall, and the connector is located inside the fixing groove, with the connector and the fixing groove engaging with each other.

[0014] A cleaning process for an automatic cleaning device for a cold source mesh bag in a nuclear power plant includes the following steps:

[0015] S1. Equipment Deployment: The wide end of the collection net is fixed to the seabed and sea surface via the second anchor head, the second connecting rope and the third anchor head. Hollow buoys are used to assist the wide end in unfolding. The foundation position of the fixed pile is fixed by the first connecting rope and the first anchor head. Then, the suction pipe, the support net cover and the support hose are connected by the first fastener and the second fastener to complete the equipment deployment.

[0016] S2. Garbage interception and collection: Seawater flows into the collection net, and marine debris and organisms are intercepted in the collection net. The suction pump is started, and the mixed garbage liquid in the collection net is sucked into the on-site collection box through the suction pipe and support hose for initial storage.

[0017] S3. Centralized transportation and treatment: The waste liquid extracted by multiple suction pumps is transported to the shore-based collection device through the main transportation pipe for separation of waste and organisms and environmental protection treatment;

[0018] S4. Equipment maintenance and inspection: The waste liquid extracted by multiple suction pumps is transported to the shore-based collection device through the main conveying pipe for separation of waste and organisms and environmental treatment.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This invention uses a wide-mouthed collection net for interception and a suction pump for active suction, which can quickly clean up marine debris and organisms in the cold source water intake area, reduce blockage of pipes and equipment in the cold source system, ensure stable delivery of cooling medium, and improve the operational safety of nuclear power plants. The number of collection nets, pile foundation layout and anchoring method can be adjusted according to the marine environment (such as water flow, depth, etc.) in the cold source water intake area of ​​nuclear power plants to adapt to different scenario requirements.

[0021] 2. This invention intercepts and collects marine life and garbage in a centralized manner, which facilitates the separation and release of living organisms in the later stage, reduces direct damage to the marine ecosystem, and protects the near-shore food chain and endangered species.

[0022] 3. This invention enables quick assembly and disassembly of the supporting hose, suction pipe, and supporting mesh cover through a fastening device. The anchoring structure is stable and easy to deploy. Daily maintenance and repair are efficient, reducing labor costs and operational risks. Attached Figure Description

[0023] Figure 1 This is a top view of the structure of the present invention;

[0024] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0025] Figure 3 This is a schematic diagram of the front structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the supporting mesh structure in this invention;

[0027] Figure 5 This is a schematic diagram of the connector structure in this invention;

[0028] Figure 6 This is a schematic diagram of the structure of fastener No. 1 and fastener No. 2 in this invention;

[0029] Figure 7 For the present invention Figure 1 A magnified schematic diagram of the structure of part A in the diagram;

[0030] Figure 8 This is a schematic diagram of the operation process of the present invention.

[0031] In the picture:

[0032] 1. Collection net; 2. Pile foundation; 3. Suction pump; 4. Suction pipe; 5. Support net cover; 6. Support hose; 7. Connector; 8. Fastener No. 1; 9. Fastener No. 2; 10. Fixing groove; 11. Movable rod; 12. Limiting clip; 13. Limiting slot; 14. First anchor head; 15. Connecting rope No. 1; 16. Hollow buoy; 17. On-site collection box; 18. Main delivery pipe; 19. Shore-based collection device; 20. Second anchor head; 21. Third anchor head; 22. Connecting rope No. 2. Detailed Implementation

[0033] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0034] As attached Figure 1 To be continued Figure 6 As shown:

[0035] Example 1: This invention provides an automatic cleaning device for cold source nets in nuclear power plants, including several collection nets 1 set in seawater. Multiple hollow floats 16 are arranged at intervals on the upper surface of the collection nets 1. A second anchor head 20 is set at the bottom of the wide opening of one end of the collection nets 1 extending to the seabed. A second connecting rope 22 is installed at the top of the wide opening of one end of the collection nets 1, which is placed on the sea surface. A third anchor head 21 is set at one end of the second connecting rope 22 extending to the seabed. A number of pile foundations 2 are set near the narrow opening of the other end of the collection nets 1. A suction pump 3 is installed on the upper surface of the pile foundations 2. Multiple suction pipes 4 are arranged side by side on the outer surface of the suction pump 3. A support net cover 5 is snapped into the inner wall of the narrow opening of the collection nets 1. A support hose 6 is installed between the suction pipes 4 and the support net cover 5.

[0036] Both ends of the support hose 6 are equipped with quick-release fastening devices for connecting the suction tube 4 and the support mesh cover 5 to the two ends of the support hose 6 respectively.

[0037] An on-site collection box 17 is installed at the external sewage outlet of the suction pump 3. Multiple suction pumps 3 are also equipped with a main conveying pipe 18. One end of the main conveying pipe 18 extends to the shore base and is connected to a shore base collection device 19 for the separation of garbage and organisms and environmental protection treatment.

[0038] The core function of the shore-based collection device 19 is to achieve centralized separation and treatment of mixed waste liquid, accurately distinguish marine debris, surviving marine organisms and seawater, avoid secondary pollution of the ocean by the debris and ensure the smooth release of surviving organisms to protect the marine ecological balance. At the same time, the separated marine debris is classified and recycled or harmlessly treated to meet environmental protection requirements. It can also receive mixed waste liquid transported by multiple suction pumps 3 through the main conveying pipe 18 to achieve centralized treatment, reduce the pressure of offshore operations, improve cleaning efficiency, and indirectly ensure the continuous and stable operation of the nuclear power plant's cold source system.

[0039] Its working principle is based on the core logic of physical graded separation and environmentally friendly disposal. First, mixed waste liquid from the sea is introduced through the main delivery pipe 18. An internal buffer chamber prevents liquid impact from causing biological death or waste accumulation and blockage. Then, a primary grid-type filter structure separates larger waste (such as fishing net debris and plastic fragments) and collects them in a dedicated recycling bin. The filtered liquid and small organisms enter the secondary treatment unit. Through a combination of low-flow-rate sedimentation and screening, the density difference between marine life and seawater causes surviving small organisms (such as small fish and juvenile shellfish) to sink to the bottom of the separation bin. Gentle water flow guides the organisms to avoid death due to compression or impact. After the separated seawater is tested for water quality, if it meets the standards, it is directly discharged back into the ocean; if it contains a small amount of impurities, it is simply filtered before being discharged. Finally, surviving marine life is guided to a suitable nearby sea area for release through a dedicated diversion channel. The remaining small debris (such as microplastics, broken seaweed, etc.) is collected in a sealed storage box and transported for regular treatment. This tiered treatment design achieves efficient cleaning while minimizing harm to marine life, taking into account both the safety of the nuclear power plant's cold source system and the protection of the marine ecosystem. Moreover, the centralized treatment mode greatly improves the convenience and environmental friendliness of the cleanup operation.

[0040] The outer surface of the pile foundation 2 is also provided with an anchoring structure to stably support the pile foundation 2 in the seawater.

[0041] As can be seen from the above, during use, the staff first plans the cleaning area of ​​the cold source water intake area, and determines the number and spacing of the collection nets 1 based on ocean depth, water flow, and other conditions. Next, the second anchor head 20 at the wide end of the collection net 1 is thrown into the seabed for fixation, the second connecting rope 22 is stretched, and the third anchor head 21 is fixed in a suitable position below the sea surface. Using the buoyancy of the hollow buoy 16, the wide end of the collection net 1 is fully extended to form a large interception area. Then, the pile foundation 2 is set up, one end of the first connecting rope 15 is tied to the bottom of the pile foundation 2, and the other end is connected to the first anchor head 14 and thrown into the seabed, so that the pile foundation 2 floats stably above the narrow opening of the collection net 1. Afterwards, the suction pipe 4, the support net cover 5, and the support hose 6 are connected by a fastening device: the connector 7 is aligned with the fixing groove 10 of the first fastener 8 and the second fastener 9, the fasteners are closed, and the movable rod 11 is rotated so that the limiting clip 12 is engaged with the limiting clip groove 13, completing the quick connection and ensuring a smooth suction path.

[0042] Example 2:

[0043] See attached document Figure 4 To be continued Figure 6The fastening device includes a connector 7, which is fixedly installed on both sides of the outer surface of the support hose 6. A first fastener 8 and a second fastener 9 are hinged to each other on the outer surface of the connector 7. A movable rod 11 is rotatably installed on one side of the second fastener 9 via a bearing. A limit clip 12 is provided on the outer surface of the movable rod 11. A limit slot 13 is opened on one side of the first fastener 8 at the position corresponding to the movable rod 11. A fixing groove 10 is opened on one side of the inner wall of both the first fastener 8 and the second fastener 9. The connector 7 is located inside the fixing groove 10, and the connector 7 and the fixing groove 10 are engaged with each other.

[0044] As shown above, when installing or replacing the support hose 6, the operator first aligns the connector 7 with the fixing grooves 10 of fastener 8 and fastener 9, and closes the two fasteners, allowing the connector 7 to embed into the fixing grooves 10. Next, the operator rotates the movable rod 11, causing the limiting clip 12 to rotate until it engages with the limiting slot 13 of fastener 8, completing the locking process. At this point, the support hose 6 is securely connected to the suction pipe 4 and the support mesh cover 5, ensuring it will not fall off during suction. When disassembly and maintenance are required, the operator rotates the movable rod 11 in the opposite direction, causing the limiting clip 12 to disengage from the limiting slot 13, allowing the fasteners to be opened and the components to be quickly separated, facilitating the cleaning of residual debris on the inner wall of the support hose 6 or troubleshooting.

[0045] Example 3:

[0046] Reference Figure 1 and Figure 2 The anchoring structure includes several No. 1 connecting ropes 15, which are respectively set at the four corners of the bottom end of the pile foundation 2. One end of the No. 1 connecting rope 15 extends to the seabed and is equipped with a first anchor head 14.

[0047] As can be seen from the above, when deploying the pile foundation 2, the workers will deploy and fix the first anchor head 14 to the predetermined position on the seabed by means of a ship or diving operation. Then, one end of the first connecting rope 15 is tied to the bottom corner of the pile foundation 2, and the other end is connected to the first anchor head 14. The gripping force of the first anchor head 14 is used to counteract the pulling force generated by the seawater flow and the operation of the suction pump 3, so that the pile foundation 2 can be stably stationed in the designated area, ensuring that the suction operation can be carried out continuously and effectively.

[0048] Example 4:

[0049] As attached Figure 7 As shown:

[0050] A cleaning process for an automatic cleaning device for a cold source mesh bag in a nuclear power plant includes the following steps:

[0051] S1. Device Deployment: The wide end of the collection net 1 is fixed to the seabed and sea surface via the second anchor head 20, the second connecting rope 22 and the third anchor head 21. Hollow buoys 16 are used to assist the wide end in unfolding. The position of the pile foundation 2 is fixed by the first connecting rope 15 and the first anchor head 14. Then, the suction pipe 4, the support net cover 5 and the support hose 6 are connected by the first fastener 8 and the second fastener 9 to complete the equipment deployment.

[0052] S2. Garbage interception and collection: Seawater flows into the collection net 1, and marine debris and organisms are intercepted in the collection net 1. The suction pump 3 is started, and the mixed garbage liquid in the collection net 1 is sucked into the on-site collection box 17 through the suction pipe 4 and the support hose 6 for initial storage.

[0053] S3. Centralized transportation and treatment: The garbage liquid extracted by multiple suction pumps 3 is transported to the shore-based collection device 19 through the main transportation pipe 18 for separation of garbage and organisms and environmental protection treatment.

[0054] S4. Equipment maintenance and inspection: The garbage liquid extracted by multiple suction pumps 3 is transported to the shore-based collection device 19 through the main conveying pipe 18 for separation of garbage and organisms and environmental protection treatment.

[0055] Working principle: The collection net 1, anchored at its wide end and supported by the buoyancy of the hollow buoy 16, opens in the cold source water intake area to intercept garbage and organisms in the seawater; the suction pump 3 generates negative pressure, which draws the garbage liquid from the net into the on-site collection tank 17 through the suction pipe 4 and the support hose 6, while the support net cover 5 ensures the stability of the net structure and improves the suction efficiency; the main delivery pipe 18 transports the garbage liquid from multiple suction pumps 3 to the shore, where the separation equipment realizes garbage recycling and organism release, reducing ecological impact; with the help of quick-release fastening devices and stable anchoring structures, the equipment is regularly inspected and cleaned to ensure long-term stable operation of the device and continuously protect the safety of the nuclear power plant's cold source system and the balance of the marine ecosystem.

[0056] The embodiments of the present invention are given for the purposes of illustration and description. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An automatic cleaning device for cold source nets in nuclear power plants, comprising a plurality of collection nets (1) disposed in seawater, characterized in that: The collection net (1) extends to the ocean floor at one wide end and is provided with several pile foundations (2) near the narrow opening at the other end of the collection net (1). A suction pump (3) is installed on the upper surface of the pile foundation (2). Multiple suction pipes (4) are arranged side by side on the outer surface of the suction pump (3). A support net cover (5) is snapped into the inner wall of the narrow opening of the collection net (1). A support hose (6) is installed between the suction pipes (4) and the support net cover (5). Both ends of the support hose (6) are provided with quick-release fastening devices for connecting the suction tube (4) and the support mesh cover (5) to the two ends of the support hose (6) respectively. The external sewage outlet of the suction pump (3) is equipped with an on-site collection box (17), and the external of the multiple suction pumps (3) is also equipped with a main conveying pipe (18). One end of the main conveying pipe (18) extends to the shore base and is connected to a shore base collection device (19) for the separation of garbage and organisms and environmental protection treatment. The outer surface of the pile foundation (2) is also provided with an anchoring structure for stably supporting the pile foundation (2) in seawater.

2. The automatic cleaning device for a nuclear power plant cold source mesh bag as described in claim 1, characterized in that: The fastening device includes a connector (7), which is fixedly installed on both sides of the outer surface of the support hose (6). The outer surface of the connector (7) is fitted with a first fastener (8) and a second fastener (9) that are hinged to each other. A movable rod (11) is rotatably mounted on one side of the second fastener (9) via a bearing. A limit stop (12) is provided on the outer surface of the movable rod (11). A limit stop groove (13) is provided on one side of the first fastener (8) at the position corresponding to the movable rod (11).

3. The automatic cleaning device for a nuclear power plant cold source mesh bag as described in claim 1, characterized in that: The anchoring structure includes several No. 1 connecting ropes (15), which are respectively set at the four corners of the bottom of the pile foundation (2). One end of the No. 1 connecting rope (15) extends to the seabed and is provided with a first anchor head (14).

4. The automatic cleaning device for a nuclear power plant cold source mesh bag as described in claim 1, characterized in that: The upper surface of the collection net (1) is provided with a number of hollow floats (16) spaced apart.

5. The automatic cleaning device for a nuclear power plant cold source mesh bag as described in claim 1, characterized in that: The collection net (1) has a wide opening at one end that extends to the seabed and is equipped with a second anchor head (20). The collection net (1) has a wide opening at one end that is placed at the sea surface and is equipped with a second connecting rope (22). The second connecting rope (22) has a wide opening at one end that extends to the seabed and is equipped with a third anchor head (21).

6. The automatic cleaning device for a nuclear power plant cold source mesh bag as described in claim 2, characterized in that: The first fastener (8) and the second fastener (9) each have a fixing groove (10) on one side of their inner wall. The connector (7) is located inside the fixing groove (10), and the connector (7) and the fixing groove (10) engage with each other.

7. A cleaning process for an automatic cleaning device for a nuclear power plant cold source mesh bag, applicable to the automatic cleaning device for a nuclear power plant cold source mesh bag as described in any one of claims 1-6, characterized in that: S1. Equipment deployment: The wide end of the collection net (1) is fixed to the seabed and sea surface by the second anchor (20), the second connecting rope (22) and the third anchor (21), and the hollow buoy (16) is used to assist the wide end to unfold; the position of the pile foundation (2) is fixed by the first connecting rope (15) and the first anchor (14), and the suction pipe (4), the support net cover (5) and the support hose (6) are connected by the first fastener (8) and the second fastener (9) to complete the equipment deployment; S2. Garbage interception and collection: Seawater flows into the collection net (1), marine garbage and organisms are intercepted in the collection net (1), the suction pump (3) is started, and the mixed garbage liquid in the collection net (1) is sucked into the on-site collection box (17) through the suction pipe (4) and the support hose (6) for initial storage; S3. Centralized transport and treatment: The garbage liquid extracted by multiple suction pumps (3) is transported to the shore-based collection device (19) through the main transport pipe (18) for separation of garbage and organisms and environmental protection treatment; S4. Equipment maintenance and inspection: The garbage liquid extracted by multiple suction pumps (3) is transported to the shore-based collection device (19) through the main conveying pipe (18) for separation of garbage and organisms and environmental protection treatment.

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