An aquaculture tail water treatment device

Abstract

The present invention discloses an aquaculture tail water treatment device, belonging to the technical field of tail water treatment. The bottom of the aquaculture pond is conical, provided with an adjustment hole penetrating the bottom. The sewage suction pipe in the pond is close to the bottom and extends upward, and is connected to the sewage discharge pipe on the side. There is a conical adjustment block and a lifting device between the adjustment hole and the sewage suction pipe, which can adjust the distance between the two, utilize the Bernoulli principle to change the suction force of the sewage suction pipe, and achieve layered cleaning. The water outlet of the sewage discharge pipe is connected to the first-level sedimentation tank through a downward-sloping diversion pipe, and a water-disturbing impeller is arranged at its water outlet to make the water flow rotate unidirectionally and avoid the accumulation of dirt. A biological filtration dam is arranged in the middle of the first-level sedimentation tank, and there is a filtration cavity in the dam, which can isolate dirt, purify water quality, improve the water body quality, and make it more suitable for the survival of aquaculture organisms or recycling. The overall structure of the device is reasonable, which can effectively treat the aquaculture tail water and maintain a good aquaculture environment.

Description

Technical Field

[0001] The present invention relates to the technical field of tail water treatment, in particular to a tail water treatment device for aquaculture. Background Art

[0002] In the process of the expansion and intensive development of aquaculture scale, the problem of aquaculture tail water becomes prominent. The utilization rate of feed feeding is limited, and the residual feed increases the organic matter and nutrient elements in the water body, leading to eutrophication; the excreta of cultured organisms contain nitrogen, phosphorus compounds, etc., which are converted into toxic substances under specific conditions and harm aquatic organisms; the residues of drugs remain in the water after use, destroying the microbial community and threatening human health; the bottom sediment releases harmful substances under conditions such as hypoxia, deteriorating the water body. Direct discharge of tail water into natural water bodies will cause water body eutrophication, algal blooms, ecological imbalance, and death of organisms, and will also pollute the soil and the surrounding environment. For aquaculture itself, poor tail water affects the growth and health of cultured organisms, and due to the tightening of environmental protection regulations, treating tail water has become a necessity for compliance operation. Therefore, there is an urgent need for aquaculture tail water treatment technology to promote the coordinated development of the industry and the environment.

[0003] During the process of aquaculture, residual feed, excreta of cultured organisms, and some colloidal substances settle to the bottom to form sediments, and the substances deposited at the bottom are often difficult to clean up. Summary of the Invention

[0004] The purpose to be achieved by the present invention is to provide a tail water treatment device for aquaculture, which solves the problem that during the process of aquaculture, residual feed, excreta of cultured organisms, and some colloidal substances settle to the bottom to form sediments, and the substances deposited at the bottom are often difficult to clean up.

[0005] To achieve the above purpose, the present invention adopts the following technical scheme: It includes a culture pond, a water supply pipe for supplying water into the culture pond, and a primary sedimentation tank connected to the culture pond. The primary sedimentation tank is lower than the culture pond. The bottom of the culture pond is of a conical structure, and a regulating hole penetrating the bottom of the culture pond is provided at the bottommost part of the culture pond. A sewage suction pipe is provided in the culture pond, which is close to the bottom of the culture pond and extends upward along the center of the bottom surface of the culture pond. The inside of the sewage suction pipe is a hollow structure that penetrates from the top to the bottom. A sewage discharge pipe extending outside the culture pond is connected to the side of the sewage suction pipe. A conical regulating block is provided between the regulating hole and the sewage suction pipe. A lifting device for pushing the conical regulating block to lift and adjust the distance between the conical regulating block and the bottom of the sewage suction pipe is provided at the bottom of the conical regulating block. A diversion pipe inclined downward and communicating with the primary sedimentation tank is provided at the water outlet of the sewage discharge pipe. A water disturbing impeller is provided at the water outlet of the diversion pipe. A biological filtration dam is provided in the middle of the primary sedimentation tank, and a filtration cavity is provided inside the biological filtration dam.

[0006] Further, the lifting device includes a support guide rail disposed in the adjustment hole and a support slide rod disposed in the support guide rail and connected to the bottom of the conical adjustment block. A lifting gear is provided on the support slide rod. Below the breeding pond, a driving gear meshing with the lifting gear and an adjustment rod for driving the driving gear to rotate are provided.

[0007] Further, a leak-proof cover is provided above the adjustment hole at the bottom of the breeding pond. The support slide rod passes through the leak-proof cover, and a flexible water-blocking cover is provided on the support slide rod between the leak-proof cover and the conical adjustment block.

[0008] Further, a plurality of circumferential grooves are provided along the radial direction of the bottom surface of the breeding pond, and an agitation mechanism is installed in the circumferential grooves to make the sludge at the bottom of the pond flow to the sludge discharge pipe. The agitation mechanism includes an elastic layer, an installation pipe, and communication air holes. Among them, the installation pipe is embedded in the circumferential groove. The top surface of the installation pipe is a plane, and a plurality of communication air holes are provided on the top surface of the installation pipe. The elastic layer covers the top surface of the installation pipe to form an air cavity. The air cavity communicates with all the communication air holes, and the air cavity is connected to an external air source.

[0009] Further, the installation pipe has an air inlet and an air outlet. The external air source is an agitation air pump connected to the air inlet, and an air outlet check valve is installed at the air outlet.

[0010] Further, the air outlet check valve includes a connecting pipe connected to the air outlet. A spring is provided in the connecting pipe, and a sealing piece is provided at the outer port of the connecting pipe. The sealing piece is connected to the spring.

[0011] Further, the biological filtration dam includes an outermost filter plate, a filter material supporting layer disposed in the filter plate, and a porous biological filter material layer disposed in the filter material supporting layer.

[0012] Further, the biological filtration dam further includes a single-hole membrane aeration pipe disposed in the porous biological filter material layer.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows;

[0014] 1. The bottom of the breeding pond is designed as a conical structure, aiming to enable various impurities, dirt, etc. generated in the pond to naturally gather towards the lowest point at the bottom under the action of gravity. The sewage suction pipe is close to the bottom of the breeding pond and extends upward along the center of the bottom surface. Its interior is a hollow structure that penetrates from the top to the bottom. Since it is close to the bottom and in the area where impurities are likely to gather, when there is water in the breeding pond and the water level difference exceeds the sewage discharge pipe, according to the overflow principle, during this process, the impurities deposited at the bottom of the breeding pond will approach the bottom opening of the sewage suction pipe along with the water flow, and then can be guided upward along the hollow channel inside the sewage suction pipe. The side of the sewage suction pipe is connected to the sewage discharge pipe extending outside the breeding pond. When the sewage suction pipe accumulates water flow containing impurities and dirt, these sewage can be discharged outside the breeding pond through the sewage discharge pipe, realizing the extraction and cleaning of the impurities and dirt deposited at the bottom of the breeding pond, so as to achieve the effect of cleaning the dirt in the breeding pond and maintaining a good breeding environment.

[0015] 2. There is an adjustment hole penetrating the bottom of the breeding pond at the bottommost part of the breeding pond. Through the adjustment hole, a conical adjustment block and a lifting device that can extend into the breeding pond can be provided at the bottom of the breeding pond. The conical adjustment block is aligned with the bottom of the sewage suction pipe. By adjusting the height of the conical adjustment block through the lifting device, the gap between the peripheral surface of the conical adjustment block and the bottom of the sewage suction pipe can be changed. Using Bernoulli's principle, the smaller the distance between the peripheral surface of the conical adjustment block and the bottom of the sewage suction pipe, that is, the smaller the channel distance for the water flow to flow into the sewage suction pipe, the faster the water flow velocity around the bottom of the sewage suction pipe, and thus the stronger the suction force formed at the bottom of the sewage suction pipe. On the contrary, when the distance between the peripheral surface of the conical adjustment block and the bottom of the sewage suction pipe becomes larger, the channel distance for the water flow to flow into the sewage suction pipe becomes smaller, and the water flow velocity becomes slower, resulting in a decrease in the suction force formed at the bottom of the sewage suction pipe. The adjustable suction force design can achieve step-by-step and layered cleaning. A smaller suction force can first suck away the relatively loose and easily driven dirt on the upper layer, avoiding the violent disturbance of the entire breeding pond water body caused by a one-time strong sewage suction, preventing the incompletely precipitated dirt from resuspending in the water and affecting the water clarity and the normal life of breeding organisms. As the cleaning process progresses, the dirt distribution at the bottom of the breeding pond gradually becomes loose. At this time, the suction force can be increased to further clean the bottom dirt with a large weight that cannot be sucked up by a small suction force. Such a gradual cleaning method can efficiently handle a large amount of dirt on the premise of ensuring the stability of the breeding environment.

[0016] 3. The primary sedimentation tank is used to completely separate the pollution from the water body. The water body with dirt discharged from the breeding pond is introduced into the primary sedimentation tank through a diversion pipe. There is a biological filtration dam in the middle of the primary sedimentation tank. The dirt is isolated in the primary sedimentation tank by the biological filtration dam, and the purified water will enter the filtration chamber through the biological filtration dam, thus realizing the fine purification of the water quality, significantly improving the water quality in a short time, effectively removing odors and colors, making the water body clearer and more transparent, and more suitable for the survival of breeding organisms or subsequent recycling.

[0017] 4. Meanwhile, a water-disturbing impeller is provided at the water outlet of the diversion pipe, which can disturb the water body so that the water flowing into the primary sedimentation tank flows in one direction, causing the water in the primary sedimentation tank to rotate continuously, avoiding the deposition of dirt at the water outlet of the diversion pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings:

[0019] Figure 1 is a schematic diagram of the overall structure of an aquaculture tail water treatment device of the present invention;

[0020] Figure 2 is a schematic diagram of the structure of the lifting device of the present invention;

[0021] Figure 3 is a schematic diagram of the structure of the conical adjusting block of the present invention;

[0022] Figure 4 of the present invention Figure 3 is an enlarged schematic diagram of part A in;

[0023] Figure 5 is a schematic diagram of the structure of the installation pipe and the elastic layer of the present invention;

[0024] Figure 6 is a schematic diagram of the structure of the biological filtration dam of the present invention;

[0025] Figure 7 is a top view of the aquaculture pond of the present invention.

[0026] In the figure: 1 aquaculture pond, 11 adjustment hole, 12 leak-proof cover, 13 circumferential groove, 2 water delivery pipe, 3 primary sedimentation tank, 31 diversion pipe, 4 sewage suction pipe, 5 sewage discharge pipe, 6 conical adjusting block, 71 support guide rail, 72 support slide rod, 73 lifting gear, 74 driving gear, 75 adjusting rod, 76 flexible water-blocking cover, 14 water-disturbing impeller, 8 agitating mechanism, 81 elastic layer, 82 installation pipe, 84 air cavity, 85 agitating air pump, 86 air outlet one-way valve, 861 spring, 862 sealing piece, 9 biological filtration dam, 91 filter plate, 92 filter material supporting layer, 93 porous biological filter material layer, 94 single-hole membrane aeration pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0028] The technical solution of the present invention will be described in detail below with specific embodiments. These specific embodiments can be combined or replaced according to actual situations, and the same or similar concepts or processes may not be described again in some embodiments.

[0029] Embodiment 1;

[0030] As Figures 1 to 7 shown, the present invention provides an aquaculture tail water treatment device, including a culture pond 1, a water supply pipe 2 for supplying water into the culture pond 1, and a primary sedimentation tank 3 connected to the culture pond 1. The primary sedimentation tank 3 is lower than the culture pond 1. The bottom of the culture pond 1 is a conical structure, and an adjustment hole 11 penetrating the bottom of the culture pond 1 is provided at the bottommost part of the culture pond 1. A sewage suction pipe 4 is provided in the culture pond 1 close to the bottom of the culture pond 1 and extending upward along the center of the bottom surface of the culture pond 1. The inside of the sewage suction pipe 4 is a hollow structure that penetrates from the top to the bottom. A sewage discharge pipe 5 extending outside the culture pond 1 is connected to the side of the sewage suction pipe 4. A conical adjustment block is provided between the adjustment hole 11 and the sewage suction pipe 4. A lifting device 7 for pushing the conical adjustment block 6 to lift and adjust the distance between the conical adjustment block 6 and the bottom of the sewage suction pipe 4 is provided at the bottom of the conical adjustment block 6. A guide pipe 31 that is inclined downward and communicates with the primary sedimentation tank 3 is provided at the water outlet of the sewage discharge pipe 5. A water disturbing impeller 14 is provided at the water outlet of the guide pipe 31. A biological filtration dam 9 is provided in the middle of the primary sedimentation tank 3, and a filtration chamber is provided inside the biological filtration dam 9.

[0031] The area below the culture pond 1 is designed to be hollowed out, and the bottom of the culture pond 1 is designed as a conical structure, aiming to enable various impurities, dirt, etc. generated in the pond to naturally gather at the lowest point at the bottom under the action of gravity. The sewage suction pipe 4 is close to the bottom of the culture pond 1 and extends upward along the center of the bottom surface. Its inside is a hollow structure that penetrates from the top to the bottom. Since it is close to the bottom and in the area where impurities are likely to gather, when there is water in the culture pond 1 and the water level difference exceeds the sewage discharge pipe 5, according to the overflow principle, during this process, the impurities deposited at the bottom of the culture pond 1 will approach the bottom opening of the sewage suction pipe 4 along with the water flow, and then can be guided upward along the hollow channel inside the sewage suction pipe 4. The sewage discharge pipe 5 connected to the side of the sewage suction pipe 4 extends outside the culture pond 1. When the sewage suction pipe 4 accumulates water flow containing impurities and dirt, these sewage can be discharged outside the culture pond 1 through the sewage discharge pipe 5, realizing the extraction and cleaning of the impurities and dirt deposited at the bottom of the culture pond 1, thereby achieving the effect of cleaning the dirt in the culture pond 1 and maintaining a good aquaculture environment.

[0032] At the bottom of the aquaculture pond 1, there is an adjustment hole 11 that penetrates the bottom of the aquaculture pond 1. Through the adjustment hole 11, a conical adjustment block 6 and a lifting device 7 that can extend into the aquaculture pond 1 can be provided at the bottom of the aquaculture pond 1. The maximum diameter of the conical adjustment block 6 is larger than the inner diameter of the sewage suction pipe 4, and the minimum diameter of the conical adjustment block 6 is one-third of the inner diameter of the sewage suction pipe 4. The conical adjustment block 6 is aligned with the bottom of the sewage suction pipe 4. By adjusting the height of the conical adjustment block 6 through the lifting device 7, the gap between the circumferential surface of the conical adjustment block 6 and the bottom of the sewage suction pipe 4 can be changed. Using Bernoulli's principle, the smaller the reduction between the circumferential surface of the conical adjustment block 6 and the bottom of the sewage suction pipe 4, that is, the smaller the channel spacing for the water flow to flow into the inverted sewage suction pipe 4, the faster the water flow velocity around the bottom of the sewage suction pipe 4, thereby strengthening the suction force formed at the bottom of the sewage suction pipe 4. On the contrary, when the spacing between the circumferential surface of the conical adjustment block 6 and the bottom of the sewage suction pipe 4 becomes larger, the channel spacing for the water flow to flow into the sewage suction pipe 4 becomes smaller, and the water flow velocity becomes slower, resulting in a decrease in the suction force formed at the bottom of the sewage suction pipe 4. The adjustable suction force design can achieve step-by-step and layered cleaning. A smaller suction force can first suck away the relatively loose and easily driven dirt on the upper layer, avoiding the violent disturbance of the entire water body in the aquaculture pond 1 caused by a one-time strong sewage suction, preventing the incompletely precipitated dirt from resuspending in the water and affecting the water clarity and the normal life of aquaculture organisms. As the cleaning process progresses, the dirt distribution at the bottom of the aquaculture pond 1 gradually becomes loose. At this time, the suction force can be increased to further clean the dirt at the bottom layer with a large weight that cannot be sucked up by a small suction force. Such a step-by-step cleaning method can efficiently handle a large amount of dirt on the premise of ensuring the stability of the aquaculture environment.

[0033] The primary sedimentation tank 3 is used to completely separate the pollution from the water body. The water body with dirt discharged from the aquaculture pond 1 is introduced into the primary sedimentation tank 3 through the diversion pipe 31. There is a biological filtration dam 9 in the middle of the primary sedimentation tank 3. The dirt is isolated in the primary sedimentation tank 3 by the biological filtration dam 9, and the purified water will enter the filtration cavity through the biological filtration dam 9, thereby realizing the refined purification of the water quality, significantly improving the water quality in a short time, effectively removing odors and colors, making the water body clearer and more transparent, and more suitable for the survival of aquaculture organisms or subsequent recycling; at the same time, a water-disturbing impeller 14 is provided at the water outlet of the diversion pipe 31, which can disturb the water body so that the water flow entering the primary sedimentation tank 3 flows in one direction, making the water in the primary sedimentation tank 3 rotate continuously, avoiding the dirt from completing sedimentation at the water outlet of the diversion pipe 31.

[0034] The lifting device 7 includes a cylindrical support guide rail 71. Inside the support guide rail 71, there are slide rails and sliders. The support slide rod 72 is installed on the slider, enabling the support slide rod 72 to slide on the support guide rail 71. The top of the support slide rod 72 is fixedly supported at the bottom of the conical adjustment block 6. On the circumferential surface of the support slide rod 72, there is a lifting gear 73. At the same time, a gear installation groove is opened on the side surface of the support guide rail 71. Below the breeding pond 1, a driving gear 74 is installed through a bearing seat. The driving gear 74 meshes with the lifting gear 73 through the gear installation groove. A regulating rod 75 is connected to the driving gear 74. The regulating rod 75 extends from the bottom of the breeding pond 1 to the outside of the breeding pond 1. At the outermost end of the regulating rod 75, there is also a bearing seat fixed to the bottom surface, realizing that by rotating the regulating rod 75, the driving gear 74 rotates. The rotating driving gear 74 can drive the support slide rod 72 to rise and fall through meshing with the lifting gear 73, realizing that the distance between the conical adjustment block 6 and the bottom of the sewage suction pipe 4 can be adjusted outside the breeding pond 1, thereby changing the suction force of the overflow suction.

[0035] Above the adjustment hole 11 at the bottom of the breeding pond 1, there is a leak-proof cover 12. The support slide rod 72 passes through the leak-proof cover 12. Between the leak-proof cover 12 and the conical adjustment block 6 on the support slide rod 72, there is a flexible water-blocking cover 76. The leak-proof cover 12 is made of steel and is also conical in structure. There is an opening in the middle of the leak-proof cover 12 that fits the support slide rod 72. The support slide rod 72 passes through the leak-proof cover 12 and is connected to the conical adjustment block 6. The flexible water-blocking cover 76 is installed on the support slide rod 72 and is located on the conical adjustment block 6 and the leak-proof cover 12. The flexible water-blocking cover 76 covers the circumferential surface of the leak-proof cover 12 and can slide on the circumferential surface of the leak-proof cover 12. The flexible water-blocking cover 76 is located at the bottom of the breeding pond 1 and can keep fitting on the circumferential surface of the leak-proof cover 12 under the water pressure at the bottom of the breeding pond 1, effectively preventing water from leaking from the bottom of the breeding pond 1.

[0036] Embodiment 2;

[0037] In order to facilitate sludge discharge and enable the sludge to converge to the sludge discharge pipe, several circumferential grooves 13 are provided along the radial direction on the bottom surface of the aquaculture pond 1, and an agitating mechanism 8 is installed in the circumferential grooves 13 to make the sludge at the bottom of the pond flow towards the sludge discharge pipe. The agitating mechanism 8 includes an elastic layer 81, a mounting pipe 82, and communicating air holes. Among them, the mounting pipe 82 is embedded in the circumferential groove 13. The top surface of the mounting pipe 82 is a plane, and several communicating air holes are opened on the top surface of the mounting pipe 82. The elastic layer 81 covers the top surface of the mounting pipe 82 to form an air cavity 84. The air cavity 84 communicates with all the communicating air holes, and the air cavity 84 is connected to an external air source; the mounting pipe 82 and the elastic member are integrally formed. When the mounting pipe 82 is embedded in the circumferential groove 13, the plane of the mounting pipe 82 can just be parallel to the circumferential surface of the aquaculture pond 1, and the elastic layer 81 is located above the circumferential surface of the aquaculture pond 1, avoiding dirt from settling in the gap between the mounting pipe 82 and the circumferential groove 13. When the external air source intermittently inflates and deflates the elastic layer 81, the size of the elastic layer 81 changes intermittently. At this time, the sludge at the bottom of the pond can flow continuously, so that under the combined action of gravity and the agitating mechanism 8, it continuously converges towards the sludge discharge pipe.

[0038] The mounting pipe 82 has an air inlet and an air outlet. The external air source is an agitating air pump 85 connected to the air inlet, and the air outlet is equipped with an air outlet check valve 86; the agitating air pump 85 is connected to the air inlet of the mounting pipe 82 and intermittently supplies gas into the cavity formed by the mounting pipe 82 and the elastic layer 81, causing the elastic layer 81 to agitate. An air outlet check valve 86 is installed at the air outlet. When the agitating air pump 85 inputs intermittent gas, the air outlet check valve 86 also exhausts intermittently along with the input of the intermittent gas, avoiding the deterioration of the agitating effect after the cavity is filled with gas.

[0039] The air outlet check valve 86 includes a connecting pipe connected to the air outlet. A spring 861 is provided in the connecting pipe and a sealing piece 862 is provided at the outer port of the connecting pipe. The sealing piece 862 is connected to the spring 861; the elastic force of the spring 861 always keeps the sealing piece 862 sealing the outer port of the connecting pipe, avoiding too fast air leakage in the cavity and poor agitating effect.

[0040] The biological filtration dam 9 includes an outermost filtration filter plate 91, a filter media support layer 92 disposed within the filtration filter plate 91, and a porous biological filter media layer 93 disposed within the filter media support layer 92; it is made of stainless steel or high-strength engineering plastic and cast into a cylindrical frame as the outermost structure of the biological filtration dam 9. The filtration filter plate 91 plays a role in initially intercepting larger particulate contaminants, preventing them from directly impacting the internal filter media support layer 92 and porous biological filter media layer 93, and protecting the structural integrity of the internal filter materials. Its evenly distributed filter holes enable water to flow into the interior of the biological filtration dam 9 more evenly, avoiding the phenomenon of water flow short-circuiting, and ensuring that the entire biological filtration dam 9 can fully exert its filtration and purification functions; the filter media support layer 92 is made of gravel and ceramsite with certain strength and porosity, and its main function is to support the porous biological filter media layer 93, keeping it in a stable position and structure within the biological filtration dam 9, and preventing the filter media from shifting or accumulating unevenly under the action of water flow. It can evenly disperse the water flow pressure, enabling the water to flow evenly through the porous biological filter media layer 93 and improving the efficiency of filtration and biological purification; the porous biological filter media layer 93 uses common porous biological filter media such as volcanic rock, zeolite, and activated carbon. Its materials have characteristics such as a porous structure, a large specific surface area, a light texture, and being rich in various mineral elements. It can provide a large number of attachment sites for microorganisms, promote the reproduction and growth of microorganisms, and its mineral components can, to a certain extent, chemically react with harmful substances in water, playing a role in adsorbing and removing pollutants.

[0041] The biological filtration dam 9 further includes a single-hole membrane aeration pipe 94 disposed within the porous biological filter media layer 93; the single-hole membrane aeration pipe 94 disposed within the porous biological filter media layer 93 can increase the dissolved oxygen content in water by aerating the water. Sufficient dissolved oxygen is crucial for the growth and reproduction of microorganisms within the biological filtration dam 9. It can promote the metabolic activities of aerobic microorganisms, enabling them to decompose organic pollutants more efficiently.

[0042] The above content is part of the specific implementation manners of the present invention and does not limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An aquaculture tail water treatment device, comprising a culture pond, a water delivery pipe for delivering water into the culture pond, and a primary sedimentation tank connected to the culture pond, the primary sedimentation tank being lower than the culture pond, characterized in that, The bottom of the breeding pond is of a conical structure, and an adjustment hole penetrating the bottom of the breeding pond is provided at the bottommost part of the breeding pond. A sewage suction pipe is arranged in the breeding pond, which is close to the bottom of the breeding pond and extends upward along the center of the bottom surface of the breeding pond. The inside of the sewage suction pipe is a hollow structure that penetrates from the top to the bottom. A sewage discharge pipe extending out of the breeding pond is connected to the side of the sewage suction pipe. A conical adjustment block is arranged between the adjustment hole and the sewage suction pipe. A lifting device for pushing the conical adjustment block to lift and adjust the distance between the conical adjustment block and the bottom of the sewage suction pipe is provided at the bottom of the conical adjustment block. A diversion pipe with a downward inclination is provided at the water outlet of the sewage discharge pipe to communicate with the first-level sedimentation tank. A water-disturbing impeller is provided at the water outlet of the diversion pipe. A biological filtration dam is arranged in the middle of the first-level sedimentation tank, and a filtration cavity is provided inside the biological filtration dam.

2. The aquaculture tail water treatment device according to claim 1, characterized in that, The lifting device includes a support guide rail arranged in the adjustment hole and a support sliding rod arranged in the support guide rail and connected to the bottom of the conical adjustment block. A lifting gear is arranged on the support sliding rod. A driving gear meshing with the lifting gear and an adjustment rod for driving the driving gear to rotate are arranged below the breeding pond.

3. The aquaculture tail water treatment device according to claim 2, characterized in that, A leak-proof cover is arranged above the adjustment hole at the bottom of the breeding pond. The support sliding rod passes through the leak-proof cover, and a flexible water-blocking cover is arranged on the support sliding rod between the leak-proof cover and the conical adjustment block.

4. An aquaculture tail water treatment device according to claim 1, characterized in that, A plurality of circumferential grooves are arranged along the radial direction of the bottom surface of the breeding pond, and an agitation mechanism is installed in the circumferential grooves to make the sludge at the bottom of the pond flow towards the sludge discharge pipe. The agitation mechanism includes an elastic layer, an installation pipe, and communication air holes. Among them, the installation pipe is embedded in the circumferential groove. The top surface of the installation pipe is a flat surface, and a plurality of communication air holes are opened on the top surface of the installation pipe. The elastic layer is coated on the top surface of the installation pipe to form an air cavity. The air cavity communicates with all the communication air holes, and the air cavity is connected to an external air source.

5. An aquaculture tail water treatment device according to claim 4, characterized in that, The installation pipe has an air inlet and an air outlet. The external air source is an agitation air pump connected to the air inlet, and an air outlet check valve is installed at the air outlet.

6. An aquaculture tail water treatment device according to claim 5, characterized in that, The air outlet check valve includes a connecting pipe connected to the air outlet. A spring is arranged inside the connecting pipe, and a sealing piece is arranged at the outer port of the connecting pipe. The sealing piece is connected to the spring.

7. An aquaculture tail water treatment device according to claim 1, characterized in that, The biological filtration dam includes an outermost filter plate, a filter material supporting layer arranged inside the filter plate, and a porous biological filter material layer arranged inside the filter material supporting layer.

8. An aquaculture tail water treatment device according to claim 7, characterized in that, The biological filtration dam further includes a single-hole membrane aeration pipe arranged inside the porous biological filter material layer.

Images