A mariculture tail water treatment device

Abstract

The present application belongs to the technical field of aquaculture tail water treatment, and discloses a seawater aquaculture tail water treatment device. The existing tail water treatment device can make oxygen dissolve in water through stirring and pressurizing, thereby facilitating the decomposition of organic matter by microorganisms in activated sludge. The tail water needs to be statically deposited, but the prior art does not have a related structure. The technical scheme of the present application comprises a stirring tank, the bottom surface of the stirring tank is fixedly provided with supporting legs, the top of the stirring tank is provided with a feed pipe and is in communication, a filter device is arranged in the stirring tank, the present application is provided with a static tank and a piston plate, the air pressure at the top of the static tank can give the piston plate a downward force, thereby making the oxygen in the air further dissolve in water, and the pressure can make the tail water in the static tank quickly settle down, improve the speed of static stratification, and the pressurized air can be discharged from the aeration device. Under the action of the stirring device, the aeration effect is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of aquaculture tail water treatment, and relates to the manufacture of special equipment for environmental protection for treating water pollution, in particular to a seawater aquaculture tail water treatment device. BACKGROUND

[0002] The aquaculture tail water contains a large amount of feces of aquaculture organisms and un-ingested feed. The discharge of the aquaculture tail water into the environment endangers the surrounding ecology. The treatment of the aquaculture tail water mainly exists in the closed cycle water aquaculture mode. The core of the process is the transamination based on the biological contact oxidation method. Nitrate bacteria convert ammonia nitrogen and nitrite nitrogen into nitrate nitrogen under aerobic conditions. The efficiency of water treatment is extremely related to the material and properties of the nitration bacteria attachment base and the species and density of the attached bacteria.

[0003] In the prior art, a seawater aquaculture tail water treatment device is disclosed in Chinese Patent No. CN117886459B. In this prior art, oxygen can be dissolved in water through stirring and pressurization, which is beneficial to the decomposition of organic matter by microorganisms in the activated sludge. The tail water needs to be statically precipitated. However, this prior art does not have related structures, and use is inconvenient. SUMMARY

[0004] In order to solve the above-mentioned problems in the prior art, the purpose of the present application is to provide a seawater aquaculture tail water treatment device. The seawater aquaculture tail water treatment device is provided with a static tank and a piston plate. Through the air pressure at the top of the static tank, a downward force can be applied to the piston plate. The oxygen in the air is further dissolved in the water. The pressure can make the tail water in the static tank quickly settle down, improve the speed of static stratification, and finally the pressurized air can be discharged from the aeration device. Under the action of the stirring device, the aeration effect is improved, and the treatment effect of the tail water is enhanced.

[0005] The technical solution adopted by the seawater aquaculture tail water treatment device to solve its technical problems is as follows:

[0006] The application provides a mariculture tail water treatment device, which comprises a stirring box, a support leg is fixedly installed on the bottom surface of the stirring box, a feeding pipe is arranged on the top of the stirring box and communicates with the stirring box, a filtering device is arranged in the stirring box, a stirring device is arranged in the stirring box, a standing box is fixedly installed on one side of the stirring box, a discharge structure is arranged on one side of the standing box, a piston plate is arranged in the standing box, a connecting hole is formed in the piston plate, a one-way valve is fixedly installed on the top of the connecting hole, a blocking plate is arranged below the connecting hole, a guide structure is arranged between the piston plate and the blocking plate, a floating block is fixedly installed on the bottom surface of the blocking plate, an air inlet device is fixedly installed on the top surface of the standing box, an aeration device is arranged at the bottom of the stirring box, the top of the standing box and the aeration device are connected through a connecting pipe, a pressure regulating valve is arranged on the connecting pipe, an air outlet pipe is fixedly installed on the top of the other side of the stirring box, and a water pumping device is arranged between the bottom of the standing box and the bottom of the stirring box.

[0007] Further, the filtering device comprises a sealing plate and a filtering box, filtering holes are uniformly arranged on the bottom surface of the filtering box, the top surface of the filtering box is open, the filtering box is arranged on the top of the stirring box and penetrates through the stirring box, the sealing plate is installed on the top surface of the stirring box through a threaded structure, and the feeding pipe penetrates through the sealing plate and is sealingly and fixedly connected.

[0008] Further, the stirring device comprises a stirring motor, a gear box with an open top surface, a first rotating shaft and a plurality of stirring plates, the gear box is fixedly installed on the bottom surface of the stirring box, the stirring motor is fixedly installed on the bottom surface of the gear box, the output shaft of the stirring motor penetrates through the gear box and is rotationally connected, the lower end of the first rotating shaft is fixedly connected with the output shaft of the stirring motor, the first rotating shaft penetrates through the bottom surface of the stirring box and is sealingly and rotationally connected, and the stirring plates are fixedly installed on the outer circumferential upper portions of the first rotating shaft.

[0009] Further, the stirring device further comprises a plurality of second rotating shafts, a driving gear and a plurality of driven gears, the second rotating shafts are uniformly distributed around the first rotating shaft, the second rotating shafts penetrate through the bottom surface of the stirring box and are sealingly and rotationally connected, the stirring plates on the first rotating shaft and the second rotating shafts are arranged in an up-down staggered mode, the driving gear is fixedly installed on the first rotating shaft, the driven gears are fixedly installed on the lower ends of the corresponding second rotating shafts, and the driven gears are all in mesh with the driving gear.

[0010] Further, the aeration device comprises an annular pipeline, the annular pipeline is fixedly installed on the inner wall bottom surface of the stirring box, a plurality of uniformly distributed microporous aerators are fixedly installed on the top surface of the annular pipeline, and the annular pipeline is connected with the top of the standing box through a communicating pipe and communicates with the top of the standing box.

[0011] Further, the water pumping device comprises a water pumping pipe and a water pumping pump, two ends of the water pumping pipe are fixedly connected with the bottom of the standing tank and the bottom of the stirring tank and are communicated with each other, the water pumping pump is fixedly installed on the bottom surface of the standing tank, the water inlet and outlet end of the water pumping pump is installed on the water pumping pipe, a check valve is fixedly installed on one end of the water pumping pipe in the standing tank, and a stop valve is fixedly installed on the water pumping pipe.

[0012] Further, the air inlet device comprises an air inlet pump, and the output end of the air inlet pump is fixedly connected with the top surface of the standing tank and is communicated with the top surface.

[0013] Further, the discharging structure comprises an L-shaped water drainage pipe, a water drainage pump, an adjusting motor, a foreign matter discharging port and a sealing door, the horizontal part of the water drainage pipe penetrates through the standing tank and is sealingly and rotatably connected, the water drainage pump and the adjusting motor are both installed on the outer periphery of the standing tank through a mounting frame, the end of the transverse part of the water drainage pipe is sealingly and rotatably connected with the water inlet end of the water drainage pump, a gear transmission structure is arranged between the output shaft of the adjusting motor and the outer periphery of the transverse part of the water drainage pipe, the foreign matter discharging port is arranged on the bottom of one side of the standing tank, and the sealing door is installed on the foreign matter discharging port through a bolt structure.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] 1. This invention provides an example of a marine aquaculture wastewater treatment device. Wastewater, activated sludge (using liquid, aerobic activated sludge), and a coagulant are added to a mixing tank via a feed pipe. A filtration device filters large particles from the wastewater. A mixing device agitates the wastewater. An air intake device draws outside air into a settling tank (an oxygen tank can also be connected for better results, but at a higher cost). A pressure regulating valve lowers the air pressure in the settling tank, allowing air to enter an aeration device via a connecting pipe. The aeration device then enters the mixing tank, where the aeration device dissolves oxygen into the wastewater, accelerating the decomposition of organic matter by microorganisms in the activated sludge and the chemical reaction between the flocculant and chemicals in the wastewater. After mixing, a pumping device draws the wastewater from the mixing tank into the settling tank. The wastewater entering the settling tank causes air to move upwards along the connecting hole. When the wastewater and... After the float contacts the water, it can drive the blocking plate to move upward and block the connection hole. The air pressure in the settling tank is increased by the pressure regulating valve, and the air inlet device fills the settling tank with gas, which can give the piston plate a downward pressure. This can then give the air remaining at the top of the effluent a downward force, allowing the oxygen in the air to further dissolve into the effluent. The pressurized gas that escapes along the pressure regulating valve can enter the aeration device along the connecting pipe, increasing the aeration effect. After settling, the stratified effluent is discharged through the discharge structure. Compared with the prior art, this invention is equipped with a settling tank and a piston plate. The air pressure at the top of the settling tank can give the piston plate a downward force, which can further dissolve the oxygen in the air into the water. This pressure can also make the effluent in the settling tank settle quickly, increasing the speed of settling and stratification. Finally, the pressurized air can be discharged from the aeration device, and under the action of the stirring device, the aeration effect is improved, thereby enhancing the treatment effect of the effluent.

[0016] 2. The marine aquaculture wastewater treatment device of the present invention can seal the top of the mixing tank through the sealing plate, filter large particles in the wastewater through the filter box, and install and disassemble the filter plate through the sealing plate, thereby cleaning the filter plate, which is convenient to use.

[0017] 3. In an example of the present invention, a marine aquaculture wastewater treatment device is provided. The user connects the stirring motor to a power source and supplies power. The output shaft of the stirring motor can drive the first rotating shaft to rotate, and the first rotating shaft can drive the stirring plate to rotate, thereby stirring the wastewater to flow and improving the aeration effect.

[0018] 4、The seawater breeding tail water treatment device of the application, the first rotating shaft can drive each second rotating shaft to rotate through the driving gear and the driven gear, the first rotating shaft and the second rotating shaft can drive the stirring plate to rotate, and then the tail water is stirred, the staggered stirring plates can give the tail water between them a shearing force, and then the oxygen in the air can be dissolved in the water, and then the decomposition of the pollutants by the microorganisms is improved.

[0019] 5、The seawater breeding tail water treatment device of the application, the self-closing hole structure is arranged in the microporous aerator, the tail water can be prevented from entering the annular pipeline, and in addition, the microporous aerator can discharge air bubbles with a diameter of 1-3 mm, and the oxygen utilization rate in the air is improved.

[0020] 6、The seawater breeding tail water treatment device of the application, the stop valve and the water pump on the water suction pipe are opened in sequence, the water pump can suck the tail water in the stirring box into the standing box along the water collecting pipe, and the check valve can prevent the tail water from flowing back, the water suction device is simple in structure and convenient to use.

[0021] 7、The seawater breeding tail water treatment device of the application, the air pump is opened, and the air pump can fill the air in the standing box, the air inlet device is simple in structure and convenient to use.

[0022] 8、The seawater breeding tail water treatment device of the application, the user opens the adjusting motor, the output shaft of the adjusting motor can drive the drain pipe to rotate through the gear transmission structure, so that the position of the end of the vertical part of the drain pipe can be adjusted, the drain pump is opened, and then the upper liquid of the tail water after standing and layering can be discharged, after the upper liquid is discharged, the sealing door is opened, and then the lower precipitate can be discharged through the impurity discharge port, the discharge structure can adjust the water inlet end of the drain pipe according to the standing and layering position, and the liquid and the precipitate are discharged respectively. BRIEF DESCRIPTION OF DRAWINGS

[0023] Other characteristics, objects and advantages of the application will become more apparent from the following detailed description of non-restrictive embodiments, made with reference to the attached drawings:

[0024] Figure 1 The figure is a structural schematic view of the application.

[0025] In the figure: 1, stirring box; 2, feed pipe; 3, standing box; 4, piston plate; 5, connecting hole; 6, blocking plate; 7, floating block; 8, exhaust pipe; 9, sealing plate; 10, filter box; 11, stirring motor; 12, gear box; 13, first rotating shaft; 14, second rotating shaft; 15, stirring plate; 16, annular pipeline; 17, microporous aerator; 18, water suction pipe; 19, water pump; 20, air inlet pump; 21, drain pipe; 22, drain pump; 23, adjusting motor; 24, impurity discharge port; 25, sealing door. DETAILED DESCRIPTION

[0026] The application will be further described below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related application, and are not a limitation on the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for ease of description.

[0027] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0028] As Figure 1The device is shown, a mariculture tail water treatment device, including stirring box 1, the bottom surface of stirring box 1 is fixedly installed with support leg, the top of stirring box 1 is provided with feed pipe 2 and intercommunication, stirring box 1 is provided with filter device, stirring box 1 is provided with stirring device, one side of stirring box 1 is fixedly installed with static box 3, one side of static box 3 is provided with discharge structure, static box 3 is provided with piston plate 4, connecting hole 5 is formed in piston plate 4, one-way valve is fixedly installed at the top of connecting hole 5, the flow direction of one-way valve is from bottom to top, the lower portion of connecting hole 5 is provided with baffle plate 6, guiding structure is arranged between baffle plate 6 and piston plate 4, guiding structure includes guide ring and guide rod, guide ring is fixedly installed in connecting hole through connecting rod, the top surface of baffle plate 6 is fixedly connected with the lower end of guide rod, the upper end of guide rod is fixedly installed with limit block, connecting hole 5 and baffle plate 6 are both tapered structure, baffle plate 6 is convenient to enter connecting hole 5, the bottom surface of baffle plate 6 is fixedly installed with float 7, the top surface of static box 3 is fixedly installed with air inlet device, air inlet device can pass air into static box 3, the bottom of stirring box 1 is provided with aeration device, the top of static box 3 and aeration device are communicated through connecting pipe, connecting pipe penetrates the top surface of static box 3 and is sealingly and fixedly connected, pressure regulating valve is arranged on connecting pipe, the air pressure of the top of static box 3 can be controlled through pressure regulating valve, pressure sensor is fixedly installed on the inner wall top surface of static box 3, pressure sensor can detect the air pressure of the upper portion of static box 3, the top of the other side of stirring box 1 is fixedly installed with exhaust pipe 8, stop valve can use electric control valve, can be electrically controlled, more convenient to use, the bottom of static box 3 and the bottom of stirring box 1 are provided with water pumping device.The tail water, activated sludge (selecting liquid, aerobic activated sludge) and coagulant are added into the stirring box 1 along the feeding pipe 2, the filtering device can filter the large particles in the tail water, the stirring device can stir the tail water, the air outside is sucked into the static box 3 through the air inlet device (an oxygen tank can also be connected, the effect is better, but the cost is high), the air pressure in the static box 3 is adjusted to be low through the pressure regulating valve, so that the air enters the aeration device along the connecting pipe, the air enters the stirring box 1 through the aeration device, the stirring device can make the oxygen in the air dissolve into the tail water, which can accelerate the decomposition of the microorganisms in the activated sludge to the organic matter in the tail water and the chemical reaction of the coagulant and the chemical in the tail water, after stirring, the tail water in the stirring box 1 is pumped into the static box 3 through the water pumping device, the tail water entering the static box 3 can make the air in the static box 3 move upwards along the connecting hole 5, when the tail water contacts the float 7, the blocking plate 6 can be driven to move upwards and block the connecting hole 5, the air pressure in the static box 3 is adjusted to be high through the pressure regulating valve, the air inlet device fills the gas into the static box 3, which can give the piston plate 4 a downward pressure, and further give the residual air at the top of the tail water a downward force, so that the oxygen in the air further dissolves into the tail water, the pressurized gas running out along the pressure regulating valve can enter the aeration device along the connecting pipe, increasing the aeration effect, after static, the layered tail water is discharged through the discharge structure, compared with the prior art, the static box 3 and the piston plate 4 are arranged, through the air pressure at the top of the static box 3, the piston plate 4 is given a downward force, and further the oxygen in the air is further dissolved in water, and the pressure can make the static box 3 quickly settle down, improving the speed of static layering, finally, the pressurized air is discharged from the aeration device, under the action of the stirring device, the aeration effect is improved, and the treatment effect of the tail water is enhanced.

[0029] As shown in Figure 1 Further preferably, the filtering device comprises a sealing plate 9 and a filtering box 10, the bottom surface of the sealing plate 9 is fixedly provided with a sealing gasket, the bottom surface of the filtering box 10 is provided with uniformly distributed filtering holes, the top surface of the filtering box 10 is open, the filtering box 10 is arranged at the top of the stirring box 1 and penetrates through the stirring box 1, a clasp ring is fixedly arranged at the top of the outer periphery of the filtering box 10, a clamping groove is arranged on the penetrating groove of the stirring box 1, and the clasp ring can be clamped in the clamping groove, thereby supporting the filtering box 10, a horizontal rod is fixedly arranged in the filtering box 10, thereby providing a force point for the user, and facilitating the taking out and placing of the filtering box 10, the sealing plate 9 is arranged on the top surface of the stirring box 1 through a threaded structure, the feeding pipe 2 penetrates through the sealing plate 9 and is sealingly and fixedly connected, and the feeding pipe 2 is a flexible pipe. The top of the stirring box 1 is sealed through the sealing plate 9, the large particles in the tail water are filtered through the filtering box 10, and the filtering plate 10 can be installed and removed through the sealing plate 9, thereby cleaning the filtering plate 10, and the use is convenient.

[0030] As Figure 1 shown in the further preferred, the stirring device comprises a stirring motor 11, a top opening gear box 12, a first rotating shaft 13 and a plurality of stirring plates 15, the gear box 12 is fixedly installed on the bottom surface of the stirring box 1, the stirring motor 11 is fixedly installed on the bottom surface of the gear box 12, the output shaft of the stirring motor 11 penetrates the gear box 12 and is rotationally connected, the lower end of the first rotating shaft 13 is fixedly connected with the output shaft of the stirring motor 11, and the specific fixed connection manner is to be connected through a shaft coupling, the first rotating shaft 13 penetrates the bottom surface of the stirring box 1 and is sealingly rotationally connected, and the specific connection manner is to be connected through a sealing bearing, and the stirring plates 15 are respectively fixedly installed on the outer circumferential upper portion of the first rotating shaft 13. The user connects the power supply to the stirring motor 11 and supplies power, the output shaft of the stirring motor 11 can drive the first rotating shaft 13 to rotate, the first rotating shaft 13 can drive the stirring plates 15 to rotate, thereby stirring the tail water to flow, and thereby improving the aeration effect.

[0031] As Figure 1 shown in the further preferred, the stirring device further comprises a plurality of second rotating shafts 14, a driving gear and a plurality of driven gears, the second rotating shafts 14 are uniformly distributed around the first rotating shaft 13, the second rotating shafts 14 penetrate the bottom surface of the stirring box 1 and are sealingly rotationally connected, and the specific connection manner is to be connected through a sealing bearing, the stirring plates 15 on the first rotating shaft 13 and the second rotating shafts 14 are arranged in an up-down staggered manner, the driving gear is fixedly installed on the first rotating shaft 13, the driven gears are respectively fixedly installed on the lower ends of the corresponding second rotating shafts 14, and the driven gears are all engaged with the driving gear. The first rotating shaft 13 can drive each of the second rotating shafts 14 to rotate through the driving gear and the driven gears, the first rotating shaft 13 and the second rotating shafts 14 can drive the stirring plates 15 to rotate, thereby stirring the tail water, the stirring plates 15 arranged in the up-down staggered manner can give a shearing force to the tail water between them, thereby enabling the oxygen in the air to dissolve in the water, and thereby improving the decomposition of pollutants by microorganisms.

[0032] As Figure 1 shown in the further preferred, the aeration device comprises an annular pipeline 16, the annular pipeline 16 is fixedly installed on the inner wall bottom surface of the stirring box 1, and the top surface of the annular pipeline 16 is respectively fixedly installed with uniformly distributed microporous aerators 17, the aeration device is provided with two annular pipelines 16, one large and one small, the two annular pipelines 16 are sleeved and connected through a communication pipe, and the annular pipeline 16 is connected with the top of the static tank 3 through a communication pipe and communicates with each other. The microporous aerator 17 is provided with a self-closing hole structure, which can prevent the tail water from entering the annular pipeline 16, and the microporous aerator 17 can discharge air bubbles of 1-3 mm in size, thereby improving the utilization rate of oxygen in the air.

[0033] As Figure 1As shown, in a further preferred embodiment, the pumping device includes a pumping pipe 18 and a pumping pump 19. The pumping pump 19 is a self-priming pump, which allows air to enter during pumping. Both ends of the pumping pipe 18 are fixedly connected to the bottom of the settling tank 3 and the bottom of the mixing tank 1, respectively, and are interconnected. The pumping pump 19 is fixedly installed on the bottom surface of the settling tank 3. The inlet and outlet ends of the pumping pump 19 are installed on the pumping pipe 18. The pumping pipe 18 is interrupted and fixedly connected to the inlet and outlet ends of the pumping pump 19. A check valve is fixedly installed at one end of the pumping pipe 18 inside the settling tank 3, and a shut-off valve is fixedly installed on the pumping pipe 18. The shut-off valve can be an electrically controlled valve, allowing for electric control and greater convenience. By sequentially opening the shut-off valve on the pumping pipe 18 and the pumping pump 19, the pumping pump 19 can pump the tailwater from the mixing tank 1 into the settling tank 3 along the receiving pipe 18. The check valve prevents the tailwater from flowing back. This pumping device has a simple structure and is easy to use.

[0034] like Figure 1 As shown, in a further preferred embodiment, the air intake device includes an air intake pump 20. The output end of the air intake pump 20 is fixedly connected to and communicates with the top surface of the settling box 3, and the input end of the air intake pump 20 is connected to an existing air filter through a pipe. When the air pump 20 is turned on, it can fill the settling box 3 with outside air. This air intake device has a simple structure and is easy to use.

[0035] like Figure 1 As shown, in a further preferred embodiment, the discharge structure includes an L-shaped drain pipe 21, a drain pump 22, an adjusting motor 23, a waste discharge port 24, and a sealing door 25. The horizontal portion of the drain pipe 21 passes through the settling box 3 and is rotatably and sealed. The drain pump 22 and the adjusting motor 23 are both mounted on the outer periphery of the settling box 3 via mounting brackets. The end of the horizontal portion of the drain pipe 21 is rotatably and sealed to the inlet end of the drain pump 22. A gear transmission structure is provided between the output shaft of the adjusting motor 23 and the outer periphery of the horizontal portion of the drain pipe 21. The mounting bracket is a shell structure, which can protect the gear transmission structure. The drain end of the drain pump 22 passes through the mounting bracket. The adjusting motor 23 is a servo motor and is controlled by a servo controller to facilitate the control of the angle of the drain pipe 21. The waste discharge port 24 is opened at the bottom of one side of the settling box 3. The sealing door 25 is installed at the waste discharge port 24 via bolts. The user turns on the regulating motor 23, and the output shaft of the regulating motor 23 can drive the drain pipe 21 to rotate through the gear transmission structure, thereby adjusting the position of the vertical end of the drain pipe 21. The drain pump 22 is turned on, and the upper liquid after the tailwater has settled and separated can be discharged. After the upper liquid is discharged, the sealing door 25 can be opened, and the lower sediment can be discharged through the impurity discharge port 24. This discharge structure can adjust the water inlet end of the drain pipe 21 according to the position of settling and separating, so that the liquid and sediment are discharged separately.

[0036] The above description is merely the preferred embodiments of the present application and the technical principles used. It should be understood by those skilled in the art that the scope of the application involved in the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by any combinations of the above technical features or equivalent features without departing from the inventive concept. For example, the above features can be replaced with the technical features disclosed in the present application (but not limited to) having similar functions to form technical solutions.

[0037] In addition to the technical features described in the specification, the remaining technical features are known to those skilled in the art. In order to highlight the innovative features of the present application, the remaining technical features will not be described here.

Claims

1. A marine aquaculture wastewater treatment device, comprising a mixing tank (1), wherein a support leg is fixedly installed on the bottom surface of the mixing tank (1), a feed pipe (2) is provided at the top of the mixing tank (1) and interconnected with it, and a filter device is provided inside the mixing tank (1), characterized in that, A stirring device is installed inside the mixing tank (1). A settling tank (3) is fixedly installed on one side of the mixing tank (1). A discharge structure is provided on one side of the settling tank (3). A piston plate (4) is installed inside the settling tank (3). A connection hole (5) is opened on the piston plate (4). A one-way valve is fixedly installed on the top of the connection hole (5). A block plate (6) is installed below the connection hole (5). A guide structure is provided between the block plate (6) and the piston plate (4). A float (7) is fixedly installed on the bottom surface of the block plate (6). An air inlet device is fixedly installed on the top surface of the settling tank (3). An aeration device is provided at the bottom of the mixing tank (1). The top of the settling tank (3) is connected to the aeration device. The devices are connected by a connecting pipe, and a pressure regulating valve is provided on the connecting pipe. An exhaust pipe (8) is fixedly installed on the top of the other side of the mixing tank (1). A water pumping device is provided between the bottom of the settling box (3) and the bottom of the mixing tank (1). The filter device includes a sealing plate (9) and a filter box (10). The bottom surface of the filter box (10) is provided with evenly distributed filter holes. The top surface of the filter box (10) is open. The filter box (10) is located on the top of the mixing tank (1) and penetrates the mixing tank (1). The sealing plate (9) is installed on the top surface of the mixing tank (1) through a threaded structure. The feed pipe (2) penetrates the sealing plate (9) and is sealed and fixedly connected.

2. The marine aquaculture wastewater treatment device according to claim 1, characterized in that, The stirring device includes a stirring motor (11), a gearbox (12) with an open top surface, a first rotating shaft (13), and several stirring plates (15). The gearbox (12) is fixedly installed on the bottom surface of the stirring box (1), the stirring motor (11) is fixedly installed on the bottom surface of the gearbox (12), the output shaft of the stirring motor (11) passes through the gearbox (12) and is rotatably connected, the lower end of the first rotating shaft (13) is fixedly connected to the output shaft of the stirring motor (11), the first rotating shaft (13) passes through the bottom surface of the stirring box (1) and is rotatably connected in a sealed manner, and the stirring plates (15) are respectively fixedly installed on the upper part of the outer periphery of the first rotating shaft (13).

3. The marine aquaculture wastewater treatment device according to claim 2, characterized in that, The stirring device also includes several second rotating shafts (14), a driving gear, and several driven gears. The second rotating shafts (14) are evenly distributed around the first rotating shaft (13). The second rotating shafts (14) pass through the bottom surface of the stirring box (1) and are sealed and rotatably connected. The stirring plates (15) on the first rotating shaft (13) and the second rotating shaft (14) are staggered vertically. The driving gear is fixedly installed on the first rotating shaft (13), and the driven gears are fixedly installed on the lower end of the corresponding second rotating shafts (14). The driven gears mesh with the driving gears.

4. The marine aquaculture wastewater treatment device according to claim 1, characterized in that, The aeration device includes an annular pipe (16), which is fixedly installed on the bottom inner wall of the mixing tank (1). The top surface of the annular pipe (16) is fixedly installed with uniformly distributed microporous aerators (17). The annular pipe (16) is connected to the top of the settling box (3) through a connecting pipe and communicates with it.

5. The marine aquaculture wastewater treatment device according to claim 1, characterized in that, The pumping device includes a pumping pipe (18) and a pumping pump (19). The two ends of the pumping pipe (18) are fixedly connected to the bottom of the settling box (3) and the bottom of the mixing box (1) and communicate with each other. The pumping pump (19) is fixedly installed on the bottom surface of the settling box (3). The inlet and outlet ends of the pumping pump (19) are installed on the pumping pipe (18). A check valve is fixedly installed at one end of the pumping pipe (18) inside the settling box (3). A shut-off valve is fixedly installed on the pumping pipe (18).

6. The marine aquaculture wastewater treatment device according to claim 1, characterized in that, The air intake device includes an air intake pump (20), the output end of which is fixedly connected to and communicates with the top surface of the settling box (3).

7. The marine aquaculture wastewater treatment device according to claim 1, characterized in that, The discharge structure includes an L-shaped drain pipe (21), a drain pump (22), an regulating motor (23), a waste discharge port (24), and a sealing door (25). The horizontal part of the drain pipe (21) passes through the settling box (3) and is sealed and rotatably connected. The drain pump (22) and the regulating motor (23) are both installed on the outer periphery of the settling box (3) by a mounting bracket. The end of the horizontal part of the drain pipe (21) is sealed and rotatably connected to the water inlet end of the drain pump (22). A gear transmission structure is provided between the output shaft of the regulating motor (23) and the outer periphery of the horizontal part of the drain pipe (21). The waste discharge port (24) is opened at the bottom of one side of the settling box (3). The sealing door (25) is installed at the waste discharge port (24) by a bolt structure.

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