A sediment separation system for aquaculture

Abstract

The present application relates to the field of aquaculture, and discloses a kind of for aquaculture bottom mud sedimentation separation system, including for carrying out aquaculture pond main body or tail water storage, and the cleaning bottom device for being set in the inner bottom of pond main body, cleaning bottom device is used to the bottom wall of pond main body is scraped bottom;Jacket cavity is provided at the outside of pond main body, filter main body is provided in jacket cavity, and sewage cavity and backwater chamber are provided at the bottom of jacket cavity, and at least one controllable opening and closing sewage outlet is provided on sewage cavity, and filter water outlet is provided on backwater chamber, and filter water outlet is connected with the water outlet end of filter main body;Pumping device and pump-out device are provided on the side wall of pond main body, and pump-out device is used to pump the water in pond main body to jacket cavity, and pumping device is connected with backwater chamber, for pumping the water in backwater chamber to pond main body. Improve the circulation and reuse of water body in aquaculture, and make the bottom mud treatment of aquaculture more optimized.

Description

Technical Field

[0001] This invention relates to the field of aquaculture technology, specifically to a sedimentation and separation system for aquaculture bottom sediment. Background Technology

[0002] In aquaculture systems, the accumulation and treatment of bottom sediment is one of the core issues affecting water quality management and aquaculture efficiency. Existing sediment treatment methods mostly rely on multi-stage sedimentation tanks for step-by-step separation, using gravity settling to gradually separate sediment particles of different sizes. However, this model has significant drawbacks: First, multi-tank series separation requires a large land area and incurs high construction and maintenance costs; second, the step-by-step sedimentation process relies on natural settling, resulting in low separation efficiency and difficulty in adapting to the large sediment loads generated by high-density aquaculture. More significantly, existing sedimentation tanks generally lack automated sludge removal devices. The accumulated sludge at the bottom of the tanks requires periodic shutdowns and manual or mechanical removal, which is not only cumbersome and labor-intensive but can also lead to secondary pollution and interruptions in the aquaculture cycle. Furthermore, the system's return water design has bottlenecks. The treated supernatant is easily disturbed during the return flow, carrying residual suspended solids and affecting water quality stability. Simultaneously, the water resource recycling rate is low, failing to meet the water-saving requirements of green aquaculture.

[0003] In summary, existing sediment treatment technologies have significant shortcomings in terms of system integration, automation, and water circulation efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a sedimentation and separation system for aquaculture bottom sediment, in order to solve the technical problems of existing bottom sediment treatment technologies, which have obvious shortcomings in terms of system integration, automation and water circulation efficiency.

[0005] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: A sedimentation and separation system for aquaculture bottom sediment includes a main body of a water tank for storing aquaculture wastewater or tailwater, and a bottom cleaning device disposed at the bottom of the main body of the water tank, the bottom cleaning device being used to scrape the bottom wall of the main body of the water tank. A jacketed cavity is provided on the outside of the main body of the water tank. A filter body is provided inside the jacketed cavity. A sewage discharge cavity and a return water cavity are provided at the bottom of the jacketed cavity. The sewage discharge cavity is provided with at least one sewage outlet that can be controlled to open and close. A water filter is provided on the return water cavity. The water filter is connected to the water outlet of the filter body. A pumping device and a pumping device are provided on the side wall of the main body of the water tank. The pumping device is used to pump water from the main body of the water tank to the jacket cavity. The pumping device is connected to the return water cavity and is used to pump water from the return water cavity to the main body of the water tank.

[0006] As a preferred embodiment of the present invention, the jacket cavity includes an arc-shaped cavity, and the pumping device is provided on one end sidewall of the arc-shaped cavity. The pumping device has multiple water inlets, and the multiple water inlets are arranged on the sidewall of the water tank body along the axial direction of the water tank body. The top of the arc-shaped cavity is open to form an arc-shaped opening. The filter body is disposed inside the arc-shaped cavity, the filter body cooperates with the arc-shaped cavity, and a buffer cavity is formed between the end of the filter body and the inner wall of the arc-shaped cavity near the pumping device. The drain outlet is provided at the bottom of the buffer chamber.

[0007] In a preferred embodiment of the present invention, a mesh plate is provided in the buffer cavity, and an opening and closing valve plate installed on the drain outlet is provided at the bottom of the mesh plate. A first driving part is connected to the top of the mesh plate. The first driving part is used to drive the mesh plate closer to the filter body and simultaneously drive the opening and closing valve plate to open the drain outlet.

[0008] As a preferred embodiment of the present invention, the bottom cleaning device includes an inclined scraper and a second driving part that drives the scraper to scrape the bottom wall of the pool body. The scraper includes a wedge-shaped panel. One side of the wedge-shaped panel forms a scraping edge that contacts the bottom surface of the main body of the pool. The other side has guide ridges arranged at equal intervals along the length of the wedge-shaped panel. The second driving part is located inside the bottom wall of the main body of the pool, and the output shaft of the second driving part is connected to the end of the wedge-shaped panel. The second driving part drives the wedge-shaped panel to rotate circumferentially to scrape the bottom wall of the main body of the pool.

[0009] In a preferred embodiment of the present invention, a guide plate is inclinedly provided on the rear side of the scraper rotation direction, and the inclination direction of the guide plate is opposite to the inclination direction of the scraper, and the end of the guide plate is connected to the second driving part. The distance of the guide plate along the radial direction of the main body of the pool is less than the radius of the main body of the pool.

[0010] As a preferred embodiment of the present invention, an inner tube is provided inside the wedge plate body along the length direction of the wedge plate body, and a nozzle is provided on the guide ridge, the nozzle communicating with the inner tube. A sliding seat is mounted on the output shaft of the second drive unit, and the sliding seat rotates synchronously with the output shaft. The sliding seat is provided with a supply chamber that connects to the inner tube. The supply chamber is connected to an external material supply source, and the material supplied by the material supply source includes flocculant.

[0011] In a preferred embodiment of the present invention, the filter body includes a fixed section and a deformable section. The outer side of the fixed section is connected to the inner wall of the arc-shaped cavity through a frame, and one side of the deformable section is connected to the fixed section. The filter outlet is located on the bottom wall of the arc-shaped cavity at the bottom of the fixed section.

[0012] As a preferred embodiment of the present invention, the diameter of the filter holes in the filter body gradually decreases in the direction near the filter outlet.

[0013] In a preferred embodiment of the present invention, the portion of the sewage discharge chamber away from the sewage discharge outlet is provided with a discharge outlet, and the discharge outlet is connected to a secondary sedimentation tank.

[0014] Compared with the prior art, the present invention has the following advantages: This invention integrates an aquaculture pond or wastewater treatment pond with a sedimentation separation pond by setting up water filtration and sedimentation separation at the bottom of the pond. A bottom cleaning device is installed in the pond to scrape the bottom, so that the sediment in the pond can be pumped, transferred, filtered and separated. The filtered return water can then enter the pond for repeated circulation, avoiding the need for multiple sedimentation ponds for natural settling in general pond sediment treatment, and improving the efficiency of water quality management in aquaculture. Attached Figure Description

[0015] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] Figure 1 This is a partial structural diagram of an embodiment of the present invention; Figure 2 This is a schematic diagram of the overall external structure of an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the bottom cleaning device of the present invention installed inside the main body of the water tank according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the scraper structure according to an embodiment of the present invention.

[0017] The labels in the diagram represent the following: 1-Water tank body; 2-Bottom cleaning device; 21-Scraper; 22-Second drive unit; 23-Scraper edge; 24-Guide ridge; 25-Guide plate; 26-Inner pipe; 27-Sliding seat; 3-Jacket cavity; 31-Arc-shaped cavity; 32-Arc-shaped opening; 33-Buffer cavity; 34-Grid plate; 35-First drive unit; 4-Pumping device; 5-Sewage discharge cavity; 51-Sewage outlet; 53-Outlet; 54-Secondary sedimentation tank; 6-Filter body; 61-Fixed section; 62-Deformable section; 63-Frame; 7-Return water cavity; 71-Filter port; 8-Pumping device. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1 to 4 As shown, the present invention provides a sedimentation and separation system for aquaculture bottom sediment, including a water tank body 1 for storing aquaculture wastewater or tailwater, and a bottom cleaning device 2 disposed at the bottom of the water tank body 1, the bottom cleaning device 2 being used to scrape the bottom wall of the water tank body 1.

[0020] A jacketed cavity 3 is provided on the outside of the main body 1 of the water tank. A filter body 6 is provided inside the jacketed cavity 3. A sewage discharge cavity 5 and a return water cavity 7 are provided at the bottom of the jacketed cavity 3. The sewage discharge cavity 5 is provided with at least one sewage outlet 51 that can be controlled to open and close. A water filter 71 is provided on the return water cavity 7. The water filter 71 is connected to the water outlet of the filter body 6.

[0021] A pumping device 8 and a pumping device 4 are provided on the side wall of the main body 1 of the water tank. The pumping device is used to pump water from the main body 1 of the water tank to the jacket cavity 3. The pumping device 8 is connected to the return water cavity 7 and is used to pump water from the return water cavity 7 back into the main body 1 of the water tank.

[0022] This invention integrates the aquaculture pond or wastewater treatment pond (i.e., the main body of the pond 1) with a sedimentation separation pond by setting up water filtration and sedimentation separation at the bottom of the pond. The sewage discharge chamber 5 and the return water chamber 7 are set at the bottom of the main body of the pond 1 in a ring shape. A bottom cleaning device is set in the main body of the pond to scrape the bottom of the pond. Of course, in this embodiment, the main body of the pond 1 can be a cylindrical structure, so that the sediment in the pond can be pumped, transferred, filtered and separated. The filtered return water can be returned to the pond for repeated circulation, avoiding the need for multiple sedimentation tanks for natural settling in general pond sediment treatment, thus improving the efficiency of water quality management in aquaculture.

[0023] This embodiment provides a specific implementation of the jacketed cavity 3: It includes an arc-shaped cavity 31, and a pumping device 4 is provided on one end side wall of the arc-shaped cavity 31. The pumping device 4 has multiple water inlets, which are arranged along the axial direction of the water tank body 1 on the side wall of the water tank body 1. The top of the arc-shaped cavity 31 is open to form an arc-shaped opening 32.

[0024] A filter body 6 is disposed inside the arc-shaped cavity 31. The filter body 6 cooperates with the arc-shaped cavity 31, and a buffer cavity 33 is formed between the end of the filter body 6 and the inner wall of the arc-shaped cavity 31 near the pumping device 4. A drain port 51 is disposed at the bottom of the buffer cavity 33.

[0025] The problem to be solved in this embodiment also includes that the filter body 6 needs to be cleaned and replaced after filtering for a period of time. For this purpose, a mesh plate 34 is provided in the buffer chamber 33. The bottom of the mesh plate 34 is provided with an opening and closing valve plate installed on the drain port 51. The top of the mesh plate 34 is connected to a first driving part 35. The first driving part 35 is used to drive the mesh plate 34 to approach the filter body 6 and simultaneously drive the opening and closing valve plate to open the drain port 51.

[0026] That is, after the filter body 6 has been working for a period of time, the filter body 6 has reached the full load state. At this time, a lot of bottom mud is adsorbed on the filter body 6. Then the pumping device 4 will stop pumping water. The first driving part 35 will drive the grid plate 34 to move towards the filter body 6 and compress the filter body 6, so that the bottom mud in the filter body 6 overflows into the buffer chamber 33. The buffer chamber 33 is not a chamber with a fixed volume.

[0027] In this embodiment, the first drive unit 35 can be a hydraulic cylinder or a linear motor. Its purpose is to drive the mesh plate 34 to press against the filter body 6 in a vertical state. In this embodiment, no further design is made for the force-bearing structure of the mesh plate 34.

[0028] To clearly explain the working principle of the bottom cleaning device 2, the bottom cleaning device 2 specifically includes an inclined scraper 21 and a second drive unit 22 that drives the scraper 21 to scrape the bottom wall of the pool body 1.

[0029] This embodiment provides a specific example of a scraper 21: The system includes a wedge panel, one side of which forms a scraping edge 23 that contacts the bottom surface of the main body of the pool, and the other side of which has guide ribs 24 evenly spaced along the length of the wedge panel. The second drive unit 22 is located inside the bottom wall of the main body of the pool, and the output shaft of the second drive unit 22 is connected to the end of the wedge panel. The second drive unit 22 drives the wedge panel to rotate circumferentially to scrape the bottom wall of the main body of the pool.

[0030] A guide plate 25 is inclined on the rear side of the scraper 21 in the direction of rotation, and the inclination direction of the guide plate 25 is opposite to that of the scraper 21. The end of the guide plate 25 is connected to the second drive unit 22. When the second drive unit 22 drives the scraper 21 to rotate in a circle, the mixture of bottom mud and water will be guided by the scraping edge 23 of the wedge plate body to flow along the surface of the scraper 21 and further divided by the guide rib 24. That is, the bottom mud and water scraped by the scraper 21 will flow between the two guide ribs 24. After the bottom mud and water cross the guide rib 24, they will flow towards the bottom wall of the pool body 1 and then flow towards the angled area formed by the guide plate 25 and the bottom wall of the pool body 1.

[0031] In this embodiment, the tilt angle of the guide plate 25 from the center of the pool body 1 toward the side wall of the pool body 1 is increased, further optimizing the vertical upward swirling flow generated between the end of the guide plate 25 and the side of the pool body 1.

[0032] The guide plate 25 can generate resistance to the water body. The function of the guide plate 25 is to guide the mixed fluid to the inner wall of the pool body 1, so that it can be absorbed and pumped out by the pumping device 4 located on the side wall of the pool body 1. The purpose of the guide plate 25 being shorter than the radius of the pool body 1 is to form an upward vortex between the end of the guide plate 25 and the inner wall of the pool body 1. In this way, the water mixed with the bottom sediment can diffuse into the interior of the pool body 1 as much as possible and be pumped out by the pumping device 4 as quickly as possible, that is, to guide the liquid of the bottom sediment to the side of the pool body 1.

[0033] In the above process, the radial distance of the guide plate 25 along the main body 1 of the pool is less than the radius of the main body 1 of the pool. Therefore, the second drive unit 22 is specifically a servo motor, which is connected to the end of the scraper 21 through a reducer.

[0034] An inner tube 26 is provided inside the wedge plate body along the length of the wedge plate body. Specifically, it is a hollow cylindrical straight tube. One end of the inner tube 26 is connected to and communicates with the sliding seat 27. A nozzle is provided on the guide ridge 24, and the nozzle communicates with the inner tube 26.

[0035] In this embodiment, for the installation and connection of the wedge panel, a sliding seat 27 is fitted on the output shaft of the second drive unit 22. The sliding seat 27 is specifically a rotary water connector structure, which is used to supply water to the inner tube 26. Part of the sliding seat 27 rotates synchronously with the output shaft. A supply chamber connected to the inner tube 26 is provided inside the sliding seat 27. The supply chamber is connected to an external material supply source. The material supplied by the material supply source includes flocculant. In this way, the flocculant can be sprayed out through the inner tube 26 and the nozzle, and mixed with the bottom mud and water between the two guide ridges 24, so as to fully combine with the bottom mud.

[0036] Furthermore, this embodiment provides a specific implementation of the filter body 6: It includes a fixed section 61 and a deformable section 62. The outer side of the fixed section 61 is connected to the inner wall of the arc-shaped cavity 31 through the frame 63, and one side of the deformable section 62 is connected to the fixed section 61.

[0037] The filter outlet 71 is located on the bottom wall of the arc-shaped cavity 31 at the bottom of the fixed section 61.

[0038] In the direction near the filter outlet 71, the diameter of the filter holes in the filter body 6 gradually decreases. The filter hole diameter of the fixed section 61 remains consistent and the shape is relatively fixed, which can ensure the stability of the water flow between the filter body 6 and the filter outlet 71. The purpose of the deformable section 62 is to be able to be compressed and to recover its deformed state.

[0039] When the water carrying bottom sediment in the buffer chamber 33 is filtered by the deformable section 62, the large pore size of the filter allows the bottom sediment to be adsorbed by the deformable section 62, while the water filtered by the fixed section 61 does not affect the flow of the water to the filter outlet 71 within a certain period of time.

[0040] When the deformation section 62 is squeezed by the grid plate 34, the bottom mud adsorbed by the deformation section 62 can be discharged. If the filter pore size of the deformation section 62 is small, the bottom mud will accumulate on the end surface of the deformation section 62 facing the buffer chamber 33. After squeezing, the filter pores are blocked, making it difficult to squeeze out the adsorbed bottom mud, which is easy to accumulate inside the deformation section 62.

[0041] The reason why the deformable section 62 is not fixed in the arc-shaped cavity 31 is that it can be squeezed and deformed by the grid plate 34. During the squeezing process, the deformable section 62 can also squeeze against the inner wall of the arc-shaped cavity 31, resisting further squeezing by the grid plate 34 and limiting further deformation of the deformable section 62. The bottom mud adsorbed in the deformable section 62 is transferred from the grid plate 34 into the buffer cavity 33 and then falls into the sewage outlet 51.

[0042] Furthermore, in this embodiment, the filter body 6 can be disassembled as a whole after being squeezed through the arc-shaped opening, avoiding the drawback of the existing method that requires the water in the filter chamber to be completely drained before the filter body can be replaced.

[0043] In this embodiment, a secondary sedimentation tank 54, which is an annular groove with a diameter larger than that of the sewage discharge chamber 5, can be built outside the sewage discharge chamber 5. The secondary sedimentation tank 54 is embedded in the soil and covered with a cover plate for easy cleaning later.

[0044] By setting an outlet 53 in the part of the sewage discharge chamber 5 away from the sewage outlet 51, and connecting the outlet 53 to a secondary sedimentation tank 54, the sediment in the sewage discharge chamber 5 is put into the secondary sedimentation tank 54. The secondary sedimentation tank 54 is similar to an extension of the sewage discharge chamber 5, which makes it easier for staff to monitor the quality of bottom sediment separation.

[0045] Of course, in this embodiment, the water that has naturally settled and stratified in the bottom mud after separation in the secondary sedimentation tank 54 can also be transferred to the return water chamber 7 for further separation of bottom mud and reuse of return water.

[0046] Meanwhile, the integration of the sewage discharge chamber 5 and the secondary sedimentation tank 54 with the main body of the water tank in this embodiment can avoid occupying a large amount of land area.

[0047] To further explain, the pumping device 4 and pumping device 8 in this embodiment are specifically vertical pumps with multiple suction ports and multiple outlet ports, which can be distributed along the axial direction of the main body of the water tank 1.

[0048] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. Those skilled in the art can make various modifications or equivalent substitutions to this application within the scope and nature of this application, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A sedimentation and separation system for aquaculture bottom sediment, characterized in that, It includes a main body (1) of a water tank for aquaculture or wastewater storage, and a bottom cleaning device (2) installed at the bottom of the main body (1) for scraping the bottom wall of the main body (1). A jacketed cavity (3) is provided on the outside of the main body (1) of the water tank. A filter body (6) is provided inside the jacketed cavity (3). A sewage discharge cavity (5) and a return water cavity (7) are provided at the bottom of the jacketed cavity (3). At least one sewage discharge port (51) that can be controlled to open and close is provided on the sewage discharge cavity (5). A water filter port (71) is provided on the return water cavity (7). The water filter port (71) is connected to the water outlet of the filter body (6). A pumping device (8) and a pumping device (4) are provided on the side wall of the main body (1) of the water tank. The pumping device is used to pump water from the main body (1) of the water tank to the jacket cavity (3). The pumping device (8) is connected to the return water cavity (7) and is used to pump water from the return water cavity (7) to the main body (1) of the water tank. The jacket cavity (3) includes an arc-shaped cavity (31), and the pumping device (4) is provided on one end side wall of the arc-shaped cavity (31). The pumping device (4) has multiple inlets, and the multiple inlets are arranged on the side wall of the water tank body (1) along the axial direction of the water tank body (1). The top of the arc-shaped cavity (31) is open to form an arc-shaped opening (32). The filter body (6) is disposed inside the arc-shaped cavity (31), the filter body (6) cooperates with the arc-shaped cavity (31), and a buffer cavity (33) is formed between the end of the filter body (6) and the inner wall of the arc-shaped cavity (31) near the pumping device (4). The drain outlet (51) is provided at the bottom of the buffer chamber (33); A mesh plate (34) is provided in the buffer chamber (33). The bottom of the mesh plate (34) is provided with an opening and closing valve plate installed on the drain port (51). The top of the mesh plate (34) is connected to a first driving part (35). The first driving part (35) is used to drive the mesh plate (34) to approach the filter body (6) and simultaneously drive the opening and closing valve plate to open the drain port (51).

2. The sedimentation and separation system for aquaculture bottom sediment according to claim 1, characterized in that, The bottom cleaning device (2) includes an inclined scraper (21) and a second drive unit (22) that drives the scraper (21) to scrape the bottom wall of the pool body (1). The scraper (21) includes a wedge plate body. One side of the wedge plate body is configured to contact the scraping edge (23) of the bottom surface of the pool body. The other side is arranged with guide ridges (24) at equal intervals along the length direction of the wedge plate body. The second drive unit (22) is located inside the bottom wall of the pool body (1). The output shaft of the second drive unit (22) is connected to the end of the wedge plate body. The second drive unit (22) drives the wedge plate body to rotate circumferentially to scrape the bottom wall of the pool body (1).

3. The sedimentation and separation system for aquaculture bottom sediment according to claim 2, characterized in that, A guide plate (25) is inclinedly provided on the rear side of the scraper (21) in the rotation direction, and the inclination direction of the guide plate (25) is opposite to the inclination direction of the scraper (21). The end of the guide plate (25) is connected to the second drive unit (22). The guide plate (25) is located at a distance from the radial side of the main body of the pool (1) that is less than the radius of the main body of the pool (1).

4. A sedimentation and separation system for aquaculture bottom sediment according to claim 2, characterized in that, An inner tube (26) is provided inside the wedge plate body along the length direction of the wedge plate body, and a nozzle is provided on the guide ridge (24), the nozzle being connected to the inner tube (26). A sliding seat (27) is mounted on the output shaft of the second drive unit (22), and the sliding seat (27) rotates synchronously with the output shaft. A supply chamber connected to the inner tube (26) is provided inside the sliding seat (27). The supply chamber is connected to an external material supply source. The material supplied by the material supply source includes flocculant.

5. A sedimentation and separation system for aquaculture bottom sediment according to claim 1, characterized in that, The filter body (6) includes a fixed section (61) and a deformable section (62). The outer side of the fixed section (61) is connected to the inner wall of the arc-shaped cavity (31) through a frame (63), and one side of the deformable section (62) is connected to the fixed section (61). The filter port (71) is located on the bottom wall of the arc-shaped cavity (31) at the bottom of the fixed section (61).

6. A sedimentation and separation system for aquaculture bottom sediment according to claim 5, characterized in that, In the direction near the water inlet (71), the diameter of the filter holes in the filter body (6) gradually decreases.

7. A sedimentation and separation system for aquaculture bottom sediment according to claim 1, characterized in that, The sewage discharge chamber (5) is provided with a discharge outlet (53) on the part away from the sewage outlet (51), and the discharge outlet (53) is connected to a secondary sedimentation tank (54).

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