Efficient and energy-saving aquaculture tail water land-based circulating purification treatment system

Abstract

The utility model discloses an efficient and energy-saving aquaculture tail water land-based circulating purification treatment system which comprises a floating object and silt separation device, a nano ozone bubble oxidation sterilization device, a nitrogen and phosphorus removal separation device, a microbiological treatment device, a sedimentation tank and a pipeline. The floating object and silt separation device comprises an outer barrel, an inner container barrel, an inner barrel cover, a support, an aeration device, a first water inlet pipe, a first water outlet pipe, a first waste discharge pipe, a second waste discharge pipe, a first collection cup and a base, the outer barrel is installed on the base, the inner container barrel is arranged in the outer barrel, and a precipitation cavity is formed between the bottom of the inner container barrel and a bottom plate of the outer barrel; an interlayer cavity is formed between the outer wall of the inner container barrel and the inner wall of the outer barrel and is communicated with the precipitation cavity; a flow guide hole is formed in the center of a bottom plate of the inner container barrel and communicates with the inner container barrel and the outer barrel. The first water inlet pipe horizontally penetrates through the outer barrel and extends into the inner container barrel in a beveling mode, and an aeration disc on the aeration device is arranged in the lower portion of the inner container barrel. Due to the adoption of the structure, the system realizes high efficiency and energy conservation.

Description

Technical Field

[0001] The utility model relates to the technical field of water circulation purification systems, in particular to a highly efficient and energy-saving land-based circulation purification treatment system for aquaculture tail water. Background Art

[0002] With the rapid development of my country's aquaculture industry, the recirculating water aquaculture model of ponds or land-based circular pools is a highly intensive new green ecological aquaculture model. The recirculating water aquaculture system is a process in which the tail water generated in the aquaculture pond is purified and treated through a series of sewage treatment equipment or devices and then recycled back for use. It mainly removes harmful pollutants such as silt, gravel, floating objects, residual bait and feces, ammonia nitrogen, phosphorus, nitrite nitrogen, etc. in the tail water, and purifies the tail water by physical filtration, sterilization and disinfection, oxygenation and dissolution, biological filtration and other treatment methods. After the purified water reaches the aquaculture water standard, it is transported back to the aquaculture pond. It not only solves the problems of water pollution and low utilization rate of water resources, and achieves energy conservation and environmental protection; it can also provide a stable, reliable, comfortable and high-quality living environment for aquaculture organisms.

[0003] Chinese utility model patent ZL202122205491.1, announcement number CN216687813U, the utility model discloses a land-based circular pond circulating aquaculture tailwater treatment system, including: a breeding pond, a filtering device, a solid-liquid separation tank, an anaerobic fermentation tank, a sedimentation tank, a submerged wetland pool, a microbial purification tank, a first-level filter dam, a second-level filter dam, a third-level filter dam and a reservoir. The bottom of the breeding pond is funnel-shaped, and the breeding pond is provided with a water inlet system and a drainage system. The drainage system includes a collection pipe for collecting middle and upper layer water and a bottom sewage pipe connected to the bottom end of the funnel. The water inlet end of the collection pipe is connected to In the middle of the breeding pond, the outlet end of the collecting pipe extends out of the breeding pond and is connected to the filtering equipment. The filtrate of the filtering equipment is connected to the sedimentation tank through a pipeline, and the filter residue of the filtering equipment is connected to the anaerobic fermentation tank through a pipeline; the bottom sewage pipe is connected to the solid-liquid separation tank, the solid sediment of the solid-liquid separation tank is connected to the anaerobic fermentation tank through a pipeline, and the supernatant of the solid-liquid separation tank is connected to the filtering equipment through a pipeline; the sedimentation tank, the first-level filter dam, the submerged wetland pool, the second-level filter dam, the microbial purification pool, the third-level filter dam and the reservoir are arranged in sequence according to the direction of water flow, and the supernatant of the reservoir is connected to the water inlet system of the breeding pond through a pipeline. The existing problems are: the functions of each pool or dam composed of the tailwater treatment system are relatively independent, the system integration is low, resulting in low tailwater purification efficiency and large energy resource consumption; at the same time, each pool or dam needs to be excavated on land, which will occupy a large area of ​​land resources, resulting in high overall cost of aquaculture and long construction period. Utility Model Content

[0004] The purpose of the utility model is to provide an efficient and energy-saving aquaculture sewage circulation purification treatment system to solve the problems raised in the above-mentioned background technology. The various devices of the system are centrally installed on land, and the various devices are connected and concentrated together through pipelines, which greatly saves land resources; the floating object and sediment separation device therein integrates the function of separating floating objects and sediment, and utilizes the structural setting of the water inlet pipe to make the tail water vortex flow in the inner tank, and cooperates with the aeration device and the collection cup to greatly improve the separation speed and filtering effect of floating objects; and the separation device also has the function of automatically collecting and discharging the sediment slurry.

[0005] Another purpose of the utility model is that the nano ozone bubble oxidation sterilization device in the system integrates a micro-nano bubble generator and an ultraviolet sterilization lamp, and utilizes high-transparency tiny bubbles to produce several times reflection of ultraviolet light, thereby greatly enhancing the sterilization effect; the micro-nano-level ozone bubbles accelerate the oxidation efficiency, so that the sterilization, disinfection and oxidation fading effects of the device are better.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A highly efficient and energy-saving land-based circulating purification treatment system for aquaculture tailwater includes a floating object and sediment separation device, a nano-ozone bubble oxidation sterilization device, a denitrification and phosphorus removal separation device, a microbial treatment device, a sedimentation tank and a pipeline. The tailwater in the aquaculture pond is pumped into the floating object and sediment separation device, which quickly separates the floating objects and sediment in the tailwater, and after filtering, it becomes Class I sewage and is transported to the nano-ozone bubble oxidation sterilization device through a pipeline; the nano-ozone bubble oxidation sterilization device generates micro-nano ozone bubbles and ultraviolet light to sterilize and disinfect Class I sewage, and after oxidation and fading, it becomes Class II sewage, and Class II sewage is transported to the denitrification and phosphorus removal separation device through a pipeline; the denitrification and phosphorus removal separation device is used to separate and collect ammonia nitrogen-containing floating objects and phosphorus-containing sediments in Class II sewage, and after filtering, it becomes Class III sewage and is transported to the microbial treatment device through a pipeline; the microbial treatment device decomposes the organic matter in Class III sewage through the metabolic activity of microorganisms, and after purification, it becomes a qualified aquaculture water body, and the aquaculture water body is discharged back to the aquaculture pond through a pipeline, forming an aquaculture tailwater circulating purification treatment system.

[0008] Specifically, the floating object and sediment separation device includes an outer barrel, an inner barrel, an inner barrel cover, a bracket, an aeration device, a first water inlet pipe, a first water outlet pipe, a first waste pipe, a second waste pipe, a first collecting cup and a base. The outer barrel is installed on the top surface of the base, and the inner barrel is centrally arranged in the outer barrel body through the bracket. A height difference is provided between the bottom of the inner barrel and the bottom plate of the outer barrel to form a sedimentation chamber, and an interlayer chamber is formed between the outer wall of the inner barrel and the inner wall of the outer barrel, and the interlayer chamber is connected with the sedimentation chamber; the bottom plate of the inner barrel is a funnel structure, and a diversion hole is provided in the center of the bottom plate of the inner barrel, and the diversion hole connects the inner barrel and the outer barrel;

[0009] The inner barrel cover is covered on the upper opening of the inner barrel to seal the inner barrel to form an inner barrel body; the first collecting cup is arranged at the top center of the inner barrel cover, and the cavity of the first collecting cup is connected with the cavity of the inner barrel cover; the pipe opening of the first row of waste pipes is arranged on the side of the first collecting cup; the second row of waste pipes is arranged on the bottom side wall of the outer barrel.

[0010] The first water inlet pipe horizontally passes through the outer barrel and extends into the inner barrel in an oblique manner, and the first water inlet pipe is connected to the cavity of the inner barrel. The tail water in the breeding pond is drawn into the inner barrel through the first water inlet pipe, and the tail water flows in the inner barrel in a vortex manner.

[0011] The aeration device includes an air pump, an air pipe, and an aeration plate arranged in the lower part of the inner barrel. The air pump is arranged on the outer barrel, and the air pipe connects the air pump and the aeration plate. When the air pump is working, air is delivered to the aeration plate, and the air is ejected from the fine holes on the aeration plate to generate a large number of bubbles. The bubbles adhere to the floating objects in the tail water, so that the floating objects quickly float to the top of the inner barrel and collect in the collection cup.

[0012] The tail water mixed with sediment flows into the sedimentation chamber of the outer barrel through the diversion hole. The vortex water flow in the sedimentation chamber slows down and gradually becomes still, and the sediment sinks rapidly. Under the centrifugal force of the water body, the sediment is pushed to the periphery of the bottom of the outer barrel, and the sediment slurry is discharged from the second row of waste pipes and input into the sedimentation tank through the pipeline.

[0013] Furthermore, in order to more conveniently collect sediment and discharge sediment slurry smoothly, a sediment collection seat is also included, the sediment collection seat is arranged at the bottom of the sedimentation chamber of the outer barrel, a spirally descending sliding surface is arranged on the top of the sediment collection seat, the sliding surface and the lower inner wall of the outer barrel form a slide groove, and the bottom notch of the slide groove is connected to the pipe opening of the second row of waste pipes.

[0014] The sediment collecting seat comprises a seat body, a column, a spiral plate and a baffle, wherein the column is arranged at the center of the top surface of the seat body, the spiral plate is spirally arranged on the column, and the baffle is longitudinally arranged with the column and connected to the radial plate edge of the spiral plate.

[0015] Furthermore, in order to improve the filtering effect of the collection cup for collecting floating objects and prevent the floating objects from being too large to block the pipeline. The first collection cup includes an outer cup barrel, an inner cup barrel, a collection cover and a top cover. The collection cover is arranged in the lower opening of the outer cup barrel, and a gap is arranged between the cover edge of the collection cover and the inner wall of the outer cup barrel. The inner cup barrel is vertically arranged at the center of the top surface of the collection cover. The barrel cavity of the inner cup barrel is connected with the cover cavity of the collection cover, and there is a gap between the top of the inner cup barrel and the inner side of the top cover. The tail water mixed with floating objects flows into the inner cup barrel after being collected by the collection cover, and then overflows from the upper opening of the inner cup barrel and enters the clamping cavity of the inner cup barrel of the outer cup barrel. Finally, the floating residue liquid flows out from the first row of waste pipes.

[0016] The nano ozone bubble oxidation sterilization device comprises a base, a round barrel, a second water inlet pipe, a second water outlet pipe, a third row of waste pipes, a micro-nano ozone bubble generator, a bubble sprayer, an air pipe and an ultraviolet sterilization lamp. The round barrel is arranged on the top of the base, and the micro-nano ozone bubble generator is arranged inside the base body; the second water inlet pipe is arranged at the middle and lower part of the side of the round barrel, the second water outlet pipe is arranged at the upper part of the side of the round barrel, and the third row of waste pipes is arranged at the center of the bottom plate of the round barrel.

[0017] The bubble ejector extends downward from the center hole of the top plate of the drum and is suspended in the drum body. The bubble ejector is connected to the micro-nano ozone bubble generator through an air delivery pipe.

[0018] Three ultraviolet sterilization lamps extend downward from the top plate of the drum and are suspended in the drum body. The ultraviolet sterilization lamps are evenly arranged and surround the bubble ejector.

[0019] The bubble ejector inputs a large amount of highly transparent micro-nano ozone bubbles, which will reflect the ultraviolet light emitted by the ultraviolet germicidal lamp several times, greatly enhancing the sterilization and disinfection effect of the ultraviolet germicidal lamp. At the same time, ozone micro-nano bubbles have the characteristics of large specific surface area, long residence time, self-pressurized dissolution, high interfacial potential, free radical generation, and enhanced mass transfer efficiency. They can better contact with organic matter, bacteria, viruses and other harmful substances in sewage and decompose them, and quickly decolorize and deodorize. The micro-nano ozone bubble generator and ultraviolet germicidal lamp are installed in a small and fully enclosed drum, which realizes extremely strong sterilization and disinfection, oxidation and dissolution functions. The Class I sewage is treated by the nano ozone bubble oxidation sterilization device to become Class II sewage, which is discharged through the second outlet pipe and flows into the denitrification and dephosphorization separation device through the pipeline.

[0020] The denitrification and dephosphorization separation device comprises a tank body, a funnel collector, a second collection cup, an inner spray head, an outer spray ring, a third water inlet pipe, a third water outlet pipe, a fourth waste pipe, a fifth waste pipe and a spray assembly. The spray assembly is arranged at the upper part of the tank body cavity, the funnel collector is arranged at the middle part of the tank body cavity and is located below the spray assembly; the second collection cup is arranged at the top of the tank body, the third water inlet pipe is arranged at the upper part of the tank body and connected to the spray assembly, the third water outlet pipe is arranged on the lower side wall of the tank body and communicates with the tank body, the fourth waste pipe is arranged on the side of the second collection cup, and one end of the fifth waste pipe is connected to the bottom of the funnel collector and extends outward through the tank body.

[0021] The inner spray head is arranged in the inner cylinder of the second collection cup, and is used to clean the inner wall of the inner cylinder of the second collection cup. The outer spray ring is arranged between the inner cylinder and the outer cylinder of the second collection cup, and is used to clean the outer wall of the inner cylinder and the inner wall of the outer cylinder of the second collection cup.

[0022] The Class II sewage containing a large number of micro-nano bubbles enters from the third water inlet pipe and is sprayed in the tank body through the spraying assembly. The micro-nano bubbles release lighter floating objects containing ammonia nitrogen and float to the second collection cup for collection, and are discharged through the fourth waste pipe and transported to the sedimentation tank through the pipe; the dissolved phosphorus is dissolved by the ozone bubbles and converted into larger phosphorus-containing particle sediments, which are collected in the funnel collector, discharged through the fifth waste pipe, and transported to the sedimentation tank through the pipeline. The Class II sewage is treated by the separator for ammonia nitrogen and phosphorus removal, and becomes Class III sewage after filtration, and is discharged through the third outlet pipe and flows into the microbial treatment device through the pipeline.

[0023] The microbial treatment device performs microbial treatment on the Class III sewage to convert it into clean, standard-compliant aquaculture water, which is discharged back into the aquaculture pond through a pipeline, forming a land-based tailwater circulation purification treatment system.

[0024] The utility model discloses a land-based circulation purification treatment system for aquaculture tail water with high efficiency and energy saving. Since the devices constituting the system are installed on land, the devices are connected together through pipelines according to the tail water purification treatment process, so that the overall land space occupied by the system is very small, which effectively saves land resources. Among them, an aeration plate is installed in the inner barrel of the floating object and sediment separation device, and the first water inlet pipe horizontally passes through the outer barrel and extends into the inner barrel in an oblique manner, so that the tail water enters the inner barrel from the first water inlet pipe and flows in the inner barrel in a vortex manner; the aeration plate is used to generate bubbles, and the bubbles adhere to the floating objects in the tail water, so that the floating objects quickly float to the top of the inner barrel and collect in the collection cup; at the same time, a sediment collection seat is set at the bottom of the outer barrel, and the slow and vortex flowing water body is used to generate appropriate centrifugal force, and the centrifugal force pushes the sediment to accumulate on the spiral sliding surface on the collection seat, which greatly improves the efficiency of separating floating objects and sediment in the tail water, and integrates the functions of separating floating objects and sediment in one device, achieving energy saving and efficiency improvement.

[0025] The nano-ozone bubble oxidation sterilization device in the utility model integrates a micro-nano ozone bubble generator and an ultraviolet sterilization lamp. While using highly transparent micro-nano bubbles to produce multiple reflections of the light of the ultraviolet lamp to improve the sterilization and disinfection effect, the ozone micro-nano bubbles also have the function of quickly oxidizing and dissolving organic matter in Class I sewage. The nano-ozone bubble oxidation sterilization device has extremely strong sterilization and disinfection, oxidation and dissolution functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is one of the three-dimensional diagrams of the present utility model.

[0027] Figure 2 It is the second stereogram of the utility model.

[0028] Figure 3 It is one of the three-dimensional diagrams of the floating object and sediment separation device of the utility model.

[0029] Figure 4 This is the second stereoscopic diagram of the floating object and sediment separation device of the utility model.

[0030] Figure 5 It is a cross-sectional view of the floating object and sediment separation device of the utility model.

[0031] Figure 6 It is a three-dimensional exploded view of the floating object and sediment separation device of the utility model.

[0032] Figure 7 It is a three-dimensional diagram of the sediment collecting seat of the utility model.

[0033] Figure 8 It is a three-dimensional diagram of the first collecting cup of the utility model.

[0034] Fig. 9 It is a stereoscopic diagram of the nano ozone bubble oxidation sterilization device of the utility model.

[0035] Fig.10 It is a cross-sectional view of the nano ozone bubble oxidation sterilization device of the utility model.

[0036] Fig.11 It is a stereoscopic diagram of the nanometer denitrification and dephosphorization separation device of the utility model.

[0037] Fig.12 It is a cross-sectional view of the nanometer denitrification and dephosphorization separation device of the utility model.

[0038] The following are marked in the figure: 11, floating matter and sediment separation device; 21, nano-ozone bubble oxidation sterilization device; 31, denitrification and phosphorus removal separation device; 41, microbial treatment device; 51, sedimentation tank; 111, outer barrel; 112, inner tank; 113, inner barrel cover; 114, bracket; 115, aeration device; 116, first water inlet pipe; 117, first water outlet pipe; 118, first waste pipe; 119, second waste pipe; 120, first collection cup; 121, base; 61, 61, sedimentation chamber; 61, interlayer chamber; 63, diversion hole; 1121, bottom plate; 1151, air pump 1151; 1152, air pipe; 1153, aeration plate; 1153a, plate rack; 1153b, jet ring; 122, sediment collection seat; 1 22a, sliding surface; 123, slide groove; 1221, seat body; 1222, column; 1223 spiral plate; 1224, baffle; 1201, outer cup tube; 1202, inner cup tube; 1203 collection cover; 1204, top cover; 211, base; 212, barrel; 213, second water inlet pipe; 214, second water outlet pipe; 215 third waste pipe; 216, micro-nano ozone bubble generator; 217, bubble ejector; 218, ultraviolet germicidal lamp; 311 tank body; 312, funnel collector; 313, second collection cup; 314, inner spray head; 315, outer spray ring; 316, third water inlet pipe; 317, third water outlet pipe; 318, fourth waste pipe; 319, fifth waste pipe; 320, spray assembly. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and technical effect of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. The described implementation method is only a part of the embodiment of the utility model, not all of the embodiments. In the utility model, terms such as "connection", "setting", "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a movable connection or a detachable connection; it can also be a mechanical connection or a circuit connection; it can be directly connected or indirectly connected through an intermediate medium. Unless otherwise clearly specified and limited, for ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances. The terms "front, back, left, right, top, and bottom" only describe the relative positions of the components in the drawings, and are not intended to be limitations of the utility model.

[0040] like Figure 1 and Figure 2As shown, a highly efficient and energy-saving land-based circulation purification treatment system for aquaculture tail water includes a floating object and sediment separation device 11, a nano-ozone bubble oxidation sterilization device 21, a denitrification and phosphorus removal separation device 31, a microbial treatment device 41, a sedimentation tank 51 and a pipeline. According to the water treatment process, the floating object and sediment separation device, the nano-ozone bubble oxidation sterilization device, the denitrification and phosphorus removal separation device, and the microbial treatment device are connected together in sequence using pipelines. The tail water in the aquaculture pond is pumped into the floating matter and sediment separation device 11, which quickly separates the floating matter and sediment in the tail water, and after filtering, it becomes Class I sewage and is transported to the nano-ozone bubble oxidation sterilization device 21 through a pipeline; the nano-ozone bubble oxidation sterilization device 21 uses ozone micro-nano bubbles and ultraviolet lamps to oxidize and dissolve the Class I sewage, sterilize and disinfect it, and decolorize the water body to turn it into Class II sewage, and the Class II sewage is transported to the denitrification and phosphorus removal separation device 31 through a pipeline; the denitrification and phosphorus removal separation device 31 is used to collect the Class II sewage to separate the floating matter containing ammonia nitrogen and the sediment containing phosphorus, and the Class II sewage is filtered to become Class III sewage and is transported to the microbial treatment device through a pipeline; the microbial treatment device 41 decomposes and purifies the organic matter in the Class III sewage through microbial metabolism and biological transformation to turn it into a qualified aquaculture water body, and the aquaculture water body is discharged back to the aquaculture pond through a pipeline, thereby forming an aquaculture tail water circulation purification treatment system. At the same time, the slag liquid, mud slurry and sediment waste liquid discharged from the floating material and sediment separation device, the nano-ozone bubble oxidation sterilization device and the denitrification and dephosphorization separation device are transported to the sedimentation tank 51 through pipelines for multi-stage series sedimentation and filtration.

[0041] Specifically, Figures 3 to 5 As shown, the floating object and sediment separation device 11 includes an outer barrel 111 with an upper opening, an inner barrel 112, an inner barrel cover 113, a bracket 114, an aeration device 115, a first water inlet pipe 116, a first water outlet pipe 117, a first waste pipe 118, a second waste pipe 119, a first collecting cup 120 and a base 121. The outer barrel 111 is installed on the top surface of the base 121, and the inner barrel 112 is centrally arranged in the outer barrel 111 through the bracket 114. A sedimentation chamber 61 is formed between the bottom of the inner barrel 112 and the bottom plate of the outer barrel 111, and an interlayer chamber 62 is formed between the outer wall of the inner barrel 112 and the inner wall of the outer barrel 111; the sedimentation chamber 61 and the interlayer chamber 62 are connected.

[0042] The bottom plate 1121 of the inner barrel is in the shape of an inverted cone, and a guide hole 63 is provided at the center of the bottom plate of the inner barrel 112 , and the guide hole 63 connects the cavity of the inner barrel 112 with the cavity of the outer barrel 111 .

[0043] The inner barrel cover 113 is in the shape of a circular cone, and the inner barrel cover 113 covers the opening of the inner liner barrel 112 to seal the inner liner barrel 112 to form an inner liner body.

[0044] The first collection cup 120 is arranged at the top center of the inner barrel cover 113, and the cavity of the first collection cup 120 is connected with the cavity of the inner barrel cover 112; the mouth of the first row of waste pipes 118 is arranged on the side of the first collection cup 120; the second row of waste pipes 119 is arranged on the bottom outer wall of the outer barrel.

[0045] The first water inlet pipe 116 horizontally passes through the outer barrel 111 and extends into the inner barrel 112 in an oblique manner. The first water inlet pipe 116 is connected to the cavity of the inner barrel 112.

[0046] The aeration device 115 includes an air pump 1151, an air pipe 1152 and an aeration plate 1153 arranged in the lower part of the inner barrel. The air pump 1151 is arranged on the outer wall of the outer barrel 111, one end of the air pipe 1152 is connected to the air outlet interface of the air pump 1151, and the other end of the air pipe 1152 extends into the inner barrel 112 and is connected to the aeration plate 1153. When the air pump 1151 is working, it delivers air to the aeration plate 1153, and the air is ejected from the fine holes on the aeration plate 1153 to generate a large number of bubbles.

[0047] The working principle of the floating object and sediment separation device 11 is as follows: the tail water enters the inner barrel 112 from the first water inlet pipe, and the tail water flows in the inner barrel 112 in a vortex manner. The upper water body in the inner barrel 112 flows faster, and the lower water body flows gradually slower. At the same time, the aeration device works, and the aeration disk 1153 generates a large number of bubbles. The bubbles adhere to the floating objects in the tail water, so that the floating objects quickly float to the water surface of the inner barrel cover, and the rotating water flow collects the floating objects into the collection cup 121; the floating object slag liquid is discharged from the first waste pipe 118 and input into the sedimentation tank 51 through the pipeline. The tail water mixed with silt flows into the sedimentation chamber 61 of the outer barrel 111 through the guide hole 63, the tail water in the sedimentation chamber 61 slowly swirls and gradually becomes still, the silt is deposited at the bottom of the outer barrel 111, and the silt slurry is discharged from the second row of waste pipes 119 and input into the sedimentation tank 51 through the pipeline; the tail water is separated and filtered to become Class I sewage, flows into the interlayer chamber 62, is discharged from the first outlet pipe 117, and is input into the nano ozone bubble oxidation sterilization device 12 through the pipeline. Since the mouth of the first water inlet pipe 116 is cut obliquely and extends into the middle of the inner barrel, the tail water flows in a vortex in the inner barrel, and with the cooperation of the bubbles generated by the aeration disk, the floating objects quickly float to the top of the inner barrel and gather together; at the same time, the tail water mixed with sediment enters the sedimentation chamber 61 in the outer barrel, and the flow rate of the tail water in the sedimentation chamber gradually slows down and tends to be calm. Under the action of the centrifugal force of the water body, the sediment is pushed to the bottom of the outer barrel 111, avoiding the accumulation of sediment in the bottom center of the outer barrel 111 due to the retention of water and causing the diversion hole to be blocked. The floating object and sediment separation device is built on land and combined with the aeration device to achieve an integrated overall structure, which greatly improves the separation efficiency of floating objects and sediment in the tail water and saves energy consumption, and the separation device occupies very little land space, effectively saving land resources.

[0048] Furthermore, in order to facilitate the collection of sediment, Figure 5 and Figure 7 As shown, it also includes a sediment collection seat 122, which is arranged in the bottom of the sedimentation chamber 61 of the outer barrel, and a spirally descending sliding surface 122a is provided on the top of the sediment collection seat 122. The sliding surface 122a and the inner wall of the outer barrel 111 form a slide groove 123, and the bottom notch of the slide groove 123 is connected to the pipe mouth of the second row of waste pipes.

[0049] Specifically, the sediment collection seat 122 includes a seat body 1221, a column 1222, a spiral plate 1223 and a baffle 1224. The column 1222 is arranged at the center of the top surface of the seat body 1221, the spiral plate 1223 is spirally arranged on the column 1222, and the baffle 1224 is longitudinally arranged on the column 1222 and connected to the radial plate edge of the spiral plate 1223.

[0050] The aeration plate 1153 includes a plate frame 1153a and air-injection rings 1153b distributed in a concentric circle shape.

[0051] The bracket 114 is in a circular shape, and a plurality of through holes are formed on the body of the bracket 114 .

[0052] like Figure 8 As shown, the first collecting cup 120 comprises an outer cup barrel 1201, an inner cup barrel 1202, a collecting cover 1203 and a top cover 1204. The collecting cover 1203 is arranged in the lower opening of the outer cup barrel 1201, and a gap 120a is arranged between the cover edge of the collecting cover and the inner wall of the outer cup barrel. The inner cup barrel 1202 is vertically arranged at the center of the top surface of the collecting cover 1203, and the barrel cavity of the inner cup barrel 1202 is connected with the cover cavity of the collecting cover. There is a gap 120b between the top of the inner cup barrel 1202 and the inner side of the top cover 1204. The tail water mixed with floating objects flows into the inner cup barrel 1202 after being collected by the collecting cover 1203, and then overflows from the upper opening of the inner cup barrel 1202, enters the inner cup barrel of the outer cup barrel, and finally the floating residue liquid flows out from the first row of waste pipes 118. The structure of the first collecting cup 120 effectively improves the effect of the first collecting cup in collecting and filtering floating objects.

[0053] like Fig. 9 and Fig.10As shown, the nano ozone bubble oxidation sterilization device 21 includes a base 211, a barrel 212, a second water inlet pipe 213, a second water outlet pipe 214, a third waste pipe 215, a micro-nano ozone bubble generator 216, a bubble ejector 217, an air pipe and an ultraviolet sterilization lamp 218. The barrel 212 is arranged on the top of the base 211, and the micro-nano ozone bubble generator 216 is arranged inside the base 211; the second water inlet pipe 213 is arranged on the barrel 212 and on the lower middle part of the side of the barrel 212; the second water outlet pipe 214 is arranged on the upper part of the side of the barrel 212; and the third waste pipe 215 is arranged at the center of the bottom plate of the barrel 212.

[0054] The bubble ejector 217 extends downward from the center hole of the top plate of the barrel 212 and is suspended inside the barrel 212 . The bubble ejector 217 is connected to the micro-nano ozone bubble generator 216 through an air pipe.

[0055] Three ultraviolet sterilization lamps 218 extend downward from the top plate of the barrel 212 and are suspended in the barrel 212 . The ultraviolet sterilization lamps 218 are evenly arranged and surround the bubble ejector 217 .

[0056] The working principle of the nano ozone bubble oxidation sterilization device 21 is as follows: the micro-nano ozone bubble generator 216 generates a large number of highly transparent micro-nano bubbles, which are input into the barrel 212 through the bubble ejector 217 to mix with the Class I sewage; the micro-nano bubbles reflect the ultraviolet light emitted by the ultraviolet germicidal lamp 218 several times, which greatly enhances the sterilization and disinfection effect of the ultraviolet germicidal lamp. At the same time, the ozone micro-nano bubbles have a high surface area and residence time, which can better contact with harmful substances such as organic matter, bacteria, viruses in the sewage and decompose them, and quickly decolorize and deodorize. The micro-nano ozone bubble generator and the ultraviolet germicidal lamp are installed in a small fully sealed barrel. While the highly transparent micro-nano bubbles reflect the light of the ultraviolet lamp multiple times to improve the sterilization and disinfection effect, the ozone micro-nano bubbles also have the function of quickly oxidizing and dissolving organic matter in the Class I sewage. The nano ozone bubble oxidation sterilization device 21 has extremely strong sterilization and disinfection, oxidation and dissolution functions, and its volume is small. The Class I sewage is treated by the nano-ozone bubble oxidation sterilization device 21 and becomes Class II sewage, which is discharged through the second outlet pipe 214 and flows into the denitrification and dephosphorization separation device 31 .

[0057] like Fig.11 and Fig.12As shown, the denitrification and dephosphorization separation device 31 includes a tank body 311, a funnel collector 312, a second collection cup 313, an inner spray head 314, an outer spray ring 315, a third water inlet pipe 316, a third water outlet pipe 317, a fourth waste pipe 318, a fifth waste pipe 319 and a spray assembly 320. The spray assembly 320 is arranged at the upper part of the cavity of the tank body 311, the funnel collector 312 is arranged in the middle part of the cavity of the tank body 311 and is located below the spray assembly 320; the second collection cup 313 is arranged on the top of the tank body 311, the third water inlet pipe 316 is arranged on the upper part of the tank body 311 and connected with the spray assembly 320, the third water outlet pipe 317 is arranged on the lower side wall of the tank body 311 and communicates with the tank body 311, the fourth waste pipe 318 is arranged on the side of the second collection cup 313, and one end of the fifth waste pipe 319 is connected to the bottom of the funnel collector 312 and extends outward through the tank body 311.

[0058] The inner spray head 314 is arranged in the inner cylinder of the second collection cup 313, and is used to clean the inner wall of the inner cylinder of the second collection cup 313. The outer spray ring 315 is arranged between the inner cylinder and the outer cylinder of the second collection cup 313, and is used to clean the outer wall of the inner cylinder and the inner wall of the outer cylinder of the second collection cup 313.

[0059] The working principle of the denitrification and dephosphorization separation device 31 is as follows: the Class II sewage containing a large number of micro-nano bubbles flows in from the third water inlet pipe 316, is sprayed in the tank body 311 through the spraying assembly 320, and the micro-nano bubbles release lighter floating objects containing ammonia nitrogen and float to the second collection cup for collection, and are discharged into the sedimentation tank 51 through the fourth waste pipe 318; the sediments with larger particles dissolved and bonded by the tiny bubbles sink into the funnel collector 312 for collection, and are discharged into the sedimentation tank 51 through the fifth waste pipe 319; the Class II sewage is denitrified, dephosphated, oxidized, separated and filtered by this separator to become Class III sewage, which is discharged through the third outlet pipe 317 and flows into the microbial treatment device 41.

[0060] The microbial treatment device 41 treats the Class III sewage to produce clean and up-to-standard aquaculture water, which is then discharged back into the aquaculture pond through a pipeline, forming a land-based tailwater circulation purification treatment system.

[0061] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A highly efficient and energy-saving land-based circulation purification treatment system for aquaculture tail water, characterized by: It includes a floating object and sediment separation device, a nano ozone bubble oxidation sterilization device, a denitrification and phosphorus removal separation device, a microbial treatment device, a sedimentation tank and a pipeline; the floating object and sediment separation device quickly separates the floating objects and sediment in the tail water to form a slag liquid, which is transported to the sedimentation tank through a pipeline, and the tail water is filtered to become Class I sewage, which is transported to the nano ozone bubble oxidation sterilization device through a pipeline; the nano ozone bubble oxidation sterilization device generates micro-nano ozone bubbles and ultraviolet light to sterilize and disinfect Class I sewage, and then oxidize and fade it to become Class II sewage, and the Class II sewage is transported to the denitrification and phosphorus removal separation device through a pipeline; the denitrification and phosphorus removal separation device is used to separate and collect ammonia nitrogen-containing floating objects and phosphorus-containing sediments in the Class II sewage, which are filtered to become Class III sewage, which are transported to the microbial treatment device through a pipeline; The microbial treatment device decomposes the organic matter in Class III sewage through microbial metabolic activities, and turns it into aquaculture water that meets the standards after treatment. The aquaculture water is then discharged back to the aquaculture pond through pipes, forming an aquaculture effluent recycling purification treatment system.

2. The land-based circulation purification treatment system for aquaculture tail water according to claim 1 is characterized in that: The floating object and sediment separation device comprises an outer barrel, an inner barrel, an inner barrel cover, a bracket, an aeration device, a first water inlet pipe, a first water outlet pipe, a first waste pipe, a second waste pipe, a first collecting cup and a base, wherein the outer barrel is mounted on the top surface of the base, the inner barrel is centrally arranged in the outer barrel body through the bracket, a height difference is provided between the bottom of the inner barrel and the bottom plate of the outer barrel to form a sedimentation chamber, an interlayer chamber is formed between the outer wall of the inner barrel and the inner wall of the outer barrel, and the interlayer chamber is connected with the sedimentation chamber; The bottom plate of the inner barrel is a funnel structure, and a diversion hole is provided in the center of the bottom plate of the inner barrel, and the diversion hole connects the inner barrel and the outer barrel; The inner barrel cover is covered on the upper opening of the inner barrel to seal the inner barrel to form an inner barrel body; the first collecting cup is arranged at the top center of the inner barrel cover, and the cavity of the first collecting cup is connected with the cavity of the inner barrel cover; the pipe opening of the first row of waste pipes is arranged on the side of the first collecting cup; the second row of waste pipes is arranged on the bottom side of the outer barrel; The first water inlet pipe horizontally passes through the outer barrel and extends into the inner barrel in an oblique manner, the first water inlet pipe is connected to the cavity of the inner barrel, and the tail water enters the inner barrel from the first water inlet pipe and flows in the inner barrel in a vortex manner; The aeration device includes an air pump, an air pipe and an aeration plate. The aeration plate is arranged in the lower part of the inner barrel, and the air pipe connects the air pump and the aeration plate. When the air pump is working, air is delivered to the aeration plate, and the air is ejected from the fine holes on the aeration plate to generate a large number of bubbles. The bubbles adhere to the floating objects in the tail water, so that the floating objects quickly float to the top of the inner barrel and flow into the collection cup.

3. The land-based circulation purification treatment system for aquaculture tail water according to claim 2 is characterized in that: It also includes a sediment collection seat, which is arranged at the bottom of the sedimentation chamber of the outer barrel. A spirally descending sliding surface is provided on the top of the sediment collection seat. The sliding surface and the lower inner wall of the outer barrel form a slide groove, and the bottom notch of the slide groove is connected to the pipe mouth of the second row of waste pipes.

4. The land-based circulation purification treatment system for aquaculture tail water according to claim 3 is characterized by: The sediment collecting seat comprises a seat body, a column, a spiral plate and a baffle, wherein the column is arranged at the center of the top surface of the seat body, the spiral plate is spirally arranged on the column, and the baffle is longitudinally arranged with the column and connected to the radial plate edge of the spiral plate.

5. The land-based circulation purification treatment system for aquaculture tail water according to claim 2 is characterized by: The aeration disc comprises a disc frame and air-jet rings distributed in the shape of concentric circles.

6. The land-based circulation purification treatment system for aquaculture tail water according to any one of claims 2 to 5, characterized in that: The first collecting cup comprises an outer cup barrel, an inner cup barrel, a collecting cover and a top cover, wherein the collecting cover is arranged in the lower opening of the outer cup barrel, a gap is arranged between the cover edge of the collecting cover and the inner wall of the outer cup barrel, the inner cup barrel is vertically arranged at the center of the top surface of the collecting cover, the barrel cavity of the inner cup barrel is connected with the cover cavity of the collecting cover, and a gap is arranged between the top of the inner cup barrel and the inner side of the top cover; the tail water mixed with floating objects is collected by the collecting cover and flows into the inner cup barrel and then overflows from the upper opening of the inner cup barrel and flows into the clamping cavity of the inner cup barrel of the outer cup barrel, and the floating objects are collected in the clamping cavity and discharged from the first row of waste pipes.

7. The land-based circulation purification treatment system for aquaculture tail water according to claim 2 is characterized by: The nano-ozone bubble oxidation sterilization device comprises a base, a round barrel, a second water inlet pipe, a second water outlet pipe, a third row of waste pipes, a micro-nano ozone bubble generator, a bubble sprayer, an air pipe and an ultraviolet sterilization lamp. The round barrel is arranged on the top of the base, and the micro-nano ozone bubble generator is arranged inside the base body; the second water inlet pipe is arranged in the middle and lower part of the side of the round barrel, the second water outlet pipe is arranged in the upper part of the side of the round barrel, and the third row of waste pipes is arranged in the center of the bottom plate of the round barrel; The bubble sprayer extends downward from the center hole of the top plate of the barrel and is suspended in the barrel body. The bubble sprayer is connected to the micro-nano ozone bubble generator through an air pipe. The ultraviolet sterilization lamp extends downward from the top plate of the barrel and is suspended in the barrel body.

8. The land-based circulation purification treatment system for aquaculture tail water according to claim 7 is characterized by: More than three ultraviolet germicidal lamps are evenly arranged around the bubble sprayer, and the length of the ultraviolet germicidal lamp is consistent with the length of the bubble sprayer.

9. The land-based circulation purification treatment system for aquaculture tail water according to claim 2 or 7, characterized in that: The denitrification and dephosphorization separation device includes a tank body, a funnel collector, a second collecting cup, a third water inlet pipe, a third water outlet pipe, a fourth waste pipe, a fifth waste pipe and a spraying assembly; the spraying assembly is arranged at the upper part of the tank body cavity, the funnel collector is arranged in the middle part of the tank body cavity and is located below the spraying assembly; the second collecting cup is arranged on the top of the tank body, the third water inlet pipe is arranged on the upper part of the tank body and connected with the spraying assembly, the third water outlet pipe is arranged on the lower side wall of the tank body and communicates with the tank body, the fourth waste pipe is arranged on the side of the second collecting cup, and one end of the fifth waste pipe is connected to the bottom of the funnel collector and extends outward through the tank body.

10. The land-based circulation purification treatment system for aquaculture tail water according to claim 9 is characterized in that: The denitrification and dephosphorization separation device also includes an inner spray head and an outer spray ring. The inner spray head is arranged in the inner cylinder of the second collecting cup, and the inner spray head is used to clean the inner wall of the inner cylinder of the second collecting cup; the outer spray ring is arranged between the inner cylinder and the outer cylinder of the second collecting cup, and is used to clean the outer wall of the inner cylinder and the inner wall of the outer cylinder of the second collecting cup.

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