Prawn fry raw water biofilter treatment device

Abstract

The invention relates to the technical field of water treatment, in particular to a prawn fry raw water biological filter treatment device. According to the technical scheme, the device comprises a pretreatment box, a disinfection box, an adjusting plate, a fine treatment box, a motor and a purification box, a screw is arranged at the output end of the motor, a nut in threaded installation with the screw is arranged at the upper end of the adjusting plate, the outer wall of the adjusting plate is sleeved with an air bag, an air pump is arranged at the upper end of the adjusting plate, and the air pump and the air bag are communicated and provided with an air supply pipe; a pressure relief valve is arranged in the air supply pipe, a disinfection box is arranged on one side of the lower portion of the fine treatment box, sealing gaskets are arranged on the inner wall of the fine treatment box and the outer wall of the purification box, overflow holes are formed in the side wall of the lower end of the purification box, and a filter material layer is arranged in the purification box. Through modular design, the efficiency and economical efficiency of prawn fry raw water treatment are remarkably improved, and the problems that a large-area biological filter cannot flexibly adjust the treatment capacity and is difficult to adapt to different scale requirements are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water treatment, and particularly relates to a biological filter device for treating raw water of prawn seedlings. BACKGROUND

[0002] The prawn seedling refers to the larval stage of prawn, which usually includes the development process from the nauplius, the zoea, the mysis to the postlarva. The quality of the seedling directly affects the success rate and economic benefits of prawn culture, so it needs to be cultivated in a high water quality environment. The raw water may contain suspended particles, ammonia nitrogen, nitrite, pathogenic microorganisms and organic matter. The raw water biological filter device removes harmful substances in the raw water through physical, chemical and biological effects, provides a clean and stable water quality environment, and ensures the healthy growth of prawn seedlings.

[0003] In the treatment of raw water of prawn seedlings, the traditional biological filter adopts a fixed large pool body design, which cannot adjust the internal space according to the flow. When the flow fluctuates, the pool body space utilization rate is low, and the filtration efficiency is unstable. When the flow is small, the use of a large space of a large pool body leads to time-consuming and labor-consuming cleaning and filter replacement, and the treatment capacity cannot be flexibly adjusted, so it is difficult to adapt to different scale requirements. Therefore, the technical personnel in the field provide a biological filter device for treating raw water of prawn seedlings to solve the problems in the background art. SUMMARY

[0004] The purpose of the present application is to provide a biological filter device for treating raw water of prawn seedlings to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a biological filter device for treating raw water of prawn seedlings, comprising a pretreatment box, a disinfection box, an adjusting plate, a fine treatment box, a motor and a purification tank, the fine treatment box is internally provided with purification tanks distributed at equal intervals, the fine treatment box is internally provided with an adjusting plate, the rear end of the fine treatment box is fixedly provided with a motor, the output end of the motor is provided with a screw rod, the upper end of the adjusting plate is provided with a nut screwed with the screw rod, the outer wall of the adjusting plate is sleeved with an air bag, the upper end of the adjusting plate is provided with an air pump, the air pump is in communication with the air bag and is provided with a gas delivery pipe, the gas delivery pipe is internally provided with a pressure relief valve, one side below the fine treatment box is provided with a disinfection box, the inner wall of the fine treatment box and the outer wall of the purification tank are both provided with a sealing gasket, the lower end edge wall of the purification tank is provided with an overflow hole, and the purification tank is internally provided with a filter layer.

[0006] Preferably, the upper end of the fine treatment box is provided with symmetrically distributed guide rods, the inner part of the adjusting plate is embedded and installed with symmetrically distributed sliding sleeves which are slidingly sleeved on the outer wall of the guide rods, the front end of the fine treatment box is provided with a bearing support, and one end of the screw rod is rotatably inserted into the inner part of the bearing support. The guide rods and the sliding sleeves ensure the stable movement of the adjusting plate, and the bearing support supports the rotation of the screw rod.

[0007] Preferably, the fine processing box is provided with equidistantly distributed delivery pipes controlled by sealing plugs at one end. The equidistantly distributed delivery pipes cooperate with the sealing plugs to facilitate uniform distribution of water flow.

[0008] Preferably, the fine processing box is provided with an aeration device at one end, which includes an aeration pump, an aeration pipe and a microporous aeration head embedded in the inner part of the lower end of the fine processing box. The aeration pump, the aeration pipe and the microporous aeration head provide uniform oxygen supply.

[0009] Preferably, the aeration pipe is made of PVC material, and the microporous aeration head has a pore diameter of 0.1 mm. The PVC material is corrosion-resistant, and the microporous aeration head has a pore diameter of 0.1 mm, which is high in oxygen utilization rate.

[0010] Preferably, the filter material layer includes a ceramsite layer and an activated carbon layer, which are filled in layers, with the ceramsite layer on top and the activated carbon layer on bottom, and are inoculated with nitrifying bacteria and denitrifying bacteria. The ceramsite layer and the activated carbon layer are filled in layers and inoculated with nitrifying bacteria and denitrifying bacteria, which efficiently removes suspended solids, organic matter and ammonia nitrogen, and provides stable water quality.

[0011] Preferably, the pre-treatment box is provided with a sedimentation tank inside, which is provided with a grid frame inside the upper end, and the grid frame is provided with a coarse filter screen inside, which has a pore diameter of 100-200 μm. The grid frame supports the coarse filter screen, and the holes inside the grid frame ensure the passage of water flow. The combination of the sedimentation tank and the coarse filter screen removes large particle suspended solids and silt, reduces the burden of the fine processing box and prolongs the service life of the filter material layer.

[0012] Preferably, the total height of the filter material layer is 1.5 m, the thickness of the ceramsite layer is 1 m, and the thickness of the activated carbon layer is 0.5 m. The total height of the filter material layer is 1.5 m, the ceramsite layer is 1 m, and the activated carbon layer is 0.5 m, which is reasonable in layering and optimizes the filtration efficiency to ensure uniform passage of water flow through the filter material layer.

[0013] Preferably, the pre-treatment box is provided with an overflow tank inside, and the pre-treatment box is communicated with the fine processing box through an overflow port. The inner wall of one side of the pre-treatment box is provided with a fine filter screen outside the overflow port, and the fine filter screen has a pore diameter of 1-5 μm. The overflow tank and the fine filter screen further filter small particles, improve water purity and reduce the pressure of subsequent treatment.

[0014] Preferably, the disinfection box is provided with an ultraviolet disinfection device inside, and the disinfection box is provided with a drain pipe at one end, which is provided with a water quality detector and a control valve inside. The ultraviolet disinfection device kills pathogenic microorganisms, and the water quality detector monitors water quality in real time to provide safe and clean effluent to meet the needs of prawn seedling cultivation.

[0015] The use method of the prawn seedling raw water biological filter treatment device comprises the following steps:

[0016] S1: before use, confirm that the pretreatment box, fine treatment box, disinfection box, motor, adjusting plate, purification box and other components are firmly installed, undamaged, check whether the connecting parts such as sealing gasket, conveying pipe and aeration device are sealed well, open the purification box, fill the filter material layer in order, the upper layer is a ceramic layer with a thickness of 1m, and the lower layer is an activated carbon layer with a thickness of 0.5m, uniformly inoculate nitrifying bacteria and denitrifying bacteria in the filter material layer, connect the raw water pipeline to the top of the grid frame in the pretreatment box, connect the drain pipe of the disinfection box to the breeding pond or water storage tank, connect the power supply, and check whether the motor, air pump, aeration pump, ultraviolet disinfection device and water quality detector are normally operated;

[0017] S2: raw water enters the pretreatment box, the raw water first removes large particle suspended solids through the coarse filter screen with a pore size of 100-200μm, the heavy particles such as sediment are settled to the bottom through the sedimentation tank, the pretreated water overflows to the overflow tank, the water in the overflow tank enters the fine treatment box through the overflow port, the fine filter screen with a pore size of 1-5μm outside the overflow port further filters small particles, the filter material layer (ceramic layer and activated carbon layer) in the purification tank adsorbs suspended solids and organic matter, and the nitrifying bacteria and denitrifying bacteria degrade ammonia nitrogen and nitrite, the aeration device is started, the aeration pump supplies oxygen to the filter material layer through the aeration pipe and the microporous aeration head with a pore size of 0.1mm, and the microbial metabolism is promoted;

[0018] S3: the motor is started, the screw rotation pushes the nut, drives the adjusting plate guided by the guide rod to reciprocate, the gas tank is inflated through the gas supply pipe, the gas tank on the outer wall of the adjusting plate is inflated and attached to the outer wall of the adjusting tank, so that the breeding water treated is prevented from entering the fine treatment box at the other end of the adjusting plate, the pressure relief valve is used for adjusting the gas pressure in the gas tank, so that the gas tank is deflated when the adjusting plate moves, the gas tank is prevented from being excessively rubbed against the inner wall of the fine treatment box when the adjusting plate moves, and then the movement of the adjusting plate is affected, the pressure relief valve adjusts the pressure of the gas tank to ensure the stability of the adjusting plate when the adjusting plate moves, the fine treated water enters the disinfection tank through the conveying pipe, the ultraviolet disinfection device is started, pathogenic microorganisms in the water are killed, the disinfected water is discharged through the drain pipe, the water quality detector monitors the water quality in real time, and the control valve adjusts the water discharge amount according to the water quality data.

[0019] Compared with the prior art, the prawn seedling raw water biological filter treatment device has the following beneficial effects:

[0020] The application is characterized in that the purification tank is modularly designed with ceramic pellets, zeolite, activated carbon and purification tank modules inoculated with nitrifying bacteria and denitrifying bacteria, the purification tank can be vertically stacked to adjust the height of the purification tank, and can be horizontally expanded or reduced in arrangement, the internal space of the fine treatment tank is adjusted by the adjusting plate, the treatment capacity can be flexibly adjusted according to the flow and treatment requirements, the filter material filling amount is optimized, the space utilization rate and the filtration efficiency are improved, the independent purification tank is convenient to disassemble, clean and replace the filter material, and the maintenance cost and time are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a front view of the application;

[0022] Figure 2 It is a top view of the application;

[0023] Figure 3 It is a side view of the fine treatment tank of the application;

[0024] Figure 4 It is a main sectional view of the fine treatment tank of the application;

[0025] Figure 5 It is a main sectional view of the pre-treatment tank of the application;

[0026] Figure 6 It is a main sectional view of the disinfection tank of the application;

[0027] Figure 7 It is a top view of the adjusting plate of the application;

[0028] Figure 8 It is a main sectional view of the purification tank of the application.

[0029] The drawings show that: 1, pre-treatment tank; 2, disinfection tank; 3, adjusting plate; 4, fine treatment tank; 5, motor; 6, conveying pipe; 7, overflow port; 8, air pump; 9, screw rod; 10, nut; 11, sliding sleeve; 12, guide rod; 13, bearing support; 14, air bag; 15, pressure relief valve; 16, air supply pipe; 17, coarse filter screen; 18, grid frame; 19, sedimentation tank; 20, overflow tank; 21, fine filter screen; 22, ultraviolet sterilizer; 23, drain pipe; 24, water quality detector; 25, control valve; 26, purification tank; 27, overflow hole; 28, aeration device. DETAILED DESCRIPTION

[0030] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the protection scope of the present application.

[0031] Please refer to Figures 1 to 8 The present application provides three embodiments:

[0032] Embodiment one:

[0033] A shrimp seedling raw water biological filter treatment device, comprising a pretreatment box 1, a disinfection box 2, an adjusting plate 3, a fine treatment box 4, a motor 5 and a purification tank 26, the fine treatment box 4 is internally provided with equidistantly distributed purification tanks 26, the fine treatment box 4 is internally provided with an adjusting plate 3, the rear end of the fine treatment box 4 is fixedly provided with a motor 5, the output end of the motor 5 is provided with a screw rod 9, the upper end of the adjusting plate 3 is provided with a nut 10 threadedly installed with the screw rod 9, the outer wall of the adjusting plate 3 is sleeved with an air bag 14, the upper end of the adjusting plate 3 is provided with an air pump 8, the air pump 8 is in communication with the air bag 14 and is provided with a gas delivery pipe 16, the gas delivery pipe 16 is internally provided with a pressure relief valve 15, the inner wall of the fine treatment box 4 and the outer wall of the purification tank 26 are both provided with sealing pads, the lower end edge wall of the purification tank 26 is provided with an overflow hole 27, and the inner portion of the purification tank 26 is provided with a filter material layer;

[0034] The upper end of the fine treatment box 4 is provided with symmetrically distributed guide rods 12, the inner portion of the adjusting plate 3 is embeddedly installed with symmetrically distributed sliding sleeves 11 which are slidingly sleeved with the outer wall of the guide rods 12, the front end of the fine treatment box 4 is provided with a bearing bracket 13, and one end of the screw rod 9 is rotatably inserted into the inner portion of the bearing bracket 13;

[0035] One end of the fine treatment box 4 is provided with equidistantly distributed conveying pipes 6 which are controlled to be opened and closed by sealing plugs;

[0036] One end of the fine treatment box 4 is provided with an aeration device 28, the aeration device 28 comprises an aeration pump 8, an aeration pipe and a microporous aeration head, and the microporous aeration head is embeddedly installed in the inner portion of the lower end of the fine treatment box 4;

[0037] The aeration pipe is made of PVC material, and the pore diameter of the microporous aeration head is 0.1 mm;

[0038] The filter material layer comprises a ceramsite layer and an activated carbon layer, the ceramsite layer and the activated carbon layer are filled in layers, the ceramsite layer is on the upper side and the activated carbon layer is on the lower side, and nitrifying bacteria and denitrifying bacteria are inoculated in the filter material layer;

[0039] The total height of the filter material layer is 1.5 m, the thickness of the ceramsite layer is 1 m, and the thickness of the activated carbon layer is 0.5 m;

[0040] It is worth mentioning that the fine treatment box 4 is a shrimp seed original water biological filter, and a water tank is arranged at the lower end of the treatment box to ensure that the purified water flows at the bottom of the fine treatment box 4.

[0041] In the process of using the fine treatment box 4, the motor 5 drives the screw rod 9 to rotate and drive the screw rod 9 to rotate. Because the adjusting plate 3 slides on the outer wall of the guide rod 12 through the sliding sleeve 11, the adjusting plate 3 is guided to slide, and the screw rod 9 pushes the nut 10. After the adjusting plate 3 is adjusted to the specified position, the treatment box filled with filter material is placed in the fine treatment box 4 at one end of the adjusting plate 3, and the treatment boxes are tightly pressed together and tightly attached to the outer wall of the fine treatment box 4 and the adjusting plate 3. At the same time, the air pump 8 operates, and the gas is sent to the inside of the air bag 14 through the gas sending pipe 16, so that the air bag 14 is inflated and attached to the outer wall of the fine treatment box 4, so that the treated water enters the other end of the adjusting plate 3. At the same time, the aeration device 28 is started, and oxygen is supplied to the filter material layer through the micro-porous aeration head. The purification tank 26 can be stacked vertically to improve the water treatment capacity. By adjusting the space of the fine treatment box 4 and the modular filter material filled treatment box, according to the breeding scale of the shrimp seed, the shrimp seed original water biological filter treatment device can efficiently and stably provide clean water quality to meet the demand of shrimp seed cultivation, and has the characteristics of flexible adjustment and easy maintenance.

[0042] Embodiment two:

[0043] The pre-treatment box 1, the disinfection box 2, the adjusting plate 3, the fine treatment box 4, the motor 5 and the purification tank 26 are provided. The fine treatment box 4 is internally provided with equidistantly distributed purification tanks 26. The fine treatment box 4 is internally provided with an adjusting plate 3. The fine treatment box 4 is fixedly provided with a motor 5 at the rear end. The output end of the motor 5 is provided with a screw rod 9. The upper end of the adjusting plate 3 is provided with a nut 10 which is threadedly installed with the screw rod 9. The outer wall of the adjusting plate 3 is sleeved with an air bag 14. The upper end of the adjusting plate 3 is provided with an air pump 8. The air pump 8 is in communication with the air bag 14 and is provided with a gas sending pipe 16. The inside of the gas sending pipe 16 is provided with a pressure relief valve 15. The inner wall of the fine treatment box 4 and the outer wall of the purification tank 26 are both provided with sealing pads. The lower end of the purification tank 26 is provided with an overflow hole 27. The inside of the purification tank 26 is provided with a filter material layer.

[0044] The upper end of the fine treatment box 4 is provided with symmetrically distributed guide rods 12. The inside of the adjusting plate 3 is embeddedly installed with symmetrically distributed sliding sleeves 11 which are slidingly sleeved on the outer wall of the guide rod 12. The front end of the fine treatment box 4 is provided with a bearing bracket 13. One end of the screw rod 9 is rotatably inserted into the inside of the bearing bracket 13.

[0045] The fine treatment box 4 is provided with equidistantly distributed delivery pipes 6 which are controlled to be opened and closed by sealing plugs.

[0046] The fine treatment box 4 is provided with an aeration device 28 at one end, the aeration device 28 comprising an aeration pump 8, an aeration pipe and a microporous aeration head, and the microporous aeration head is embeddedly installed inside the lower end of the fine treatment box 4;

[0047] The aeration pipe is made of PVC material, and the microporous aeration head has a pore diameter of 0.1 mm;

[0048] The filter material layer comprises a ceramsite layer and an activated carbon layer, and the ceramsite layer and the activated carbon layer are filled in layers, with the ceramsite layer on top and the activated carbon layer on bottom, and the filter material layer is inoculated with nitrifying bacteria and denitrifying bacteria;

[0049] The total height of the filter material layer is 1.5 m, the thickness of the ceramsite layer is 1 m, and the thickness of the activated carbon layer is 0.5 m;

[0050] It is worth mentioning that the fine treatment box 4 is a prawn seedling raw water biological filter, and a water tank is formed at the lower end of the treatment box to ensure that the purified water flows at the bottom of the fine treatment box 4;

[0051] During use of the fine treatment box 4, the motor 5 drives the screw rod 9 to rotate and drive the screw rod 9 to rotate, because the adjusting plate 3 is guided to slide on the outer wall of the guide rod 12 through the sliding sleeve 11, the adjusting plate 3 is guided to slide, the screw rod 9 realizes pushing of the nut 10, after the adjusting plate 3 is adjusted to a specified position, the treatment box filled with filter material is placed inside the fine treatment box 4 at one end of the adjusting plate 3, and the treatment boxes are tightly pressed together and tightly attached to the outer wall of the fine treatment box 4 and the adjusting plate 3, at the same time, the air pump 8 operates to transport gas into the air bag 14 through the air pipe 16, so that the air bag 14 is inflated and attached to the outer wall of the fine treatment box 4, avoiding the treated water from entering the other end of the adjusting plate 3, at the same time, the aeration device 28 is started to supply oxygen to the filter material layer through the microporous aeration head, and the purification box 26 can be vertically stacked and stacked to improve the water treatment capacity, by adjusting the space of the fine treatment box 4 and the modularly filled treatment boxes, according to the breeding scale of prawn seedlings, the prawn seedling raw water biological filter treatment device can efficiently and stably provide clean water quality to meet the needs of prawn seedling cultivation, and has the characteristics of flexible adjustment and easy maintenance.

[0052] The pre-treatment box 1 is provided with a sedimentation tank 19 inside, the sedimentation tank 19 is provided with a grid frame 18 inside the upper end, and the grid frame 18 is provided with a coarse filter screen 17 inside;

[0053] The pre-treatment box 1 is provided with an overflow tank 20 inside, the pre-treatment box 1 is communicated with the fine treatment box 4 through an overflow port 7, and the inner wall of one side of the pre-treatment box 1 is provided with a fine filter screen 21 located outside the overflow port 7, and the fine filter screen 21 has a pore diameter of 1-5 μm;

[0054] The raw water enters the grid frame 18 of the pretreatment box 1, and the raw water first passes through the coarse filter screen 17 with a pore size of 100-200 μm to remove large particles of suspended matter, passes through the sedimentation tank 19, and the heavy particles such as silt are settled to the bottom, and the pretreated water overflows to the overflow tank 20, and the fine filter screen 21 filters the small particles, and enters the fine treatment box 4 through the overflow port 7. In this process, the use of power equipment is avoided, and energy consumption is reduced. It is worth noting that a deslagging pipe is arranged inside the lower end of the pretreatment box 1 when the device is set, and the sediment is discharged.

[0055] Embodiment three:

[0056] The device comprises a pretreatment box 1, a disinfection box 2, an adjusting plate 3, a fine treatment box 4, a motor 5, and a purification box 26. The fine treatment box 4 is internally provided with the purification boxes 26 which are distributed at equal intervals. The fine treatment box 4 is internally provided with the adjusting plate 3. The rear end of the fine treatment box 4 is fixedly provided with the motor 5. The output end of the motor 5 is provided with a screw rod 9. The upper end of the adjusting plate 3 is provided with a nut 10 which is threadedly installed with the screw rod 9. The outer wall of the adjusting plate 3 is sleeved with an air bag 14. The upper end of the adjusting plate 3 is provided with an air pump 8. The air pump 8 is in communication with the air bag 14 and is provided with a gas delivery pipe 16. The gas delivery pipe 16 is internally provided with a pressure relief valve 15. The inner wall of the fine treatment box 4 and the outer wall of the purification box 26 are both provided with sealing pads. The lower end edge wall of the purification box 26 is provided with an overflow hole 27. The purification box 26 is internally provided with a filter material layer.

[0057] The upper end of the fine treatment box 4 is provided with symmetrically distributed guide rods 12. The adjusting plate 3 is internally embedded and installed with symmetrically distributed sliding sleeves 11 which are slidingly sleeved with the outer walls of the guide rods 12. The front end of the fine treatment box 4 is provided with a bearing bracket 13. One end of the screw rod 9 is rotatably inserted into the inner part of the bearing bracket 13.

[0058] One end of the fine treatment box 4 is provided with the delivery pipes 6 which are distributed at equal intervals and are controlled to be opened and closed by the sealing plugs.

[0059] One end of the fine treatment box 4 is provided with an aeration device 28. The aeration device 28 comprises an aeration pump 8, an aeration pipe, and a microporous aeration head. The microporous aeration head is embedded and installed in the inner part of the lower end of the fine treatment box 4.

[0060] The aeration pipe is made of PVC material. The pore size of the microporous aeration head is 0.1 mm.

[0061] The filter material layer comprises a ceramsite layer and an activated carbon layer. The ceramsite layer and the activated carbon layer are filled in layers. The ceramsite layer is on the upper side, and the activated carbon layer is on the lower side. The filter material layer is inoculated with nitrifying bacteria and denitrifying bacteria.

[0062] The total height of the filter material layer is 1.5 m. The thickness of the ceramsite layer is 1 m. The thickness of the activated carbon layer is 0.5 m.

[0063] It is worth mentioning that the fine treatment box 4 is a shrimp seed original water biological filter, and a water tank is arranged at the lower end of the treatment box to ensure that the purified water flows at the bottom of the fine treatment box 4.

[0064] In the process of using the fine treatment box 4, the motor 5 drives the screw rod 9 to rotate and drive the screw rod 9 to rotate. Because the adjusting plate 3 slides on the outer wall of the guide rod 12 through the sliding sleeve 11, the adjusting plate 3 is guided to slide, and the screw rod 9 pushes the nut 10. After the adjusting plate 3 is adjusted to the specified position, the treatment box filled with filter material is placed in the fine treatment box 4 at one end of the adjusting plate 3, and the treatment boxes are tightly pressed together and tightly attached to the outer wall of the fine treatment box 4 and the adjusting plate 3. At the same time, the air pump 8 operates, and the gas is sent to the inside of the air bag 14 through the gas sending pipe 16, so that the air bag 14 is inflated and attached to the outer wall of the fine treatment box 4, so that the water treated enters the other end of the adjusting plate 3. At the same time, the aeration device 28 is started, and oxygen is supplied to the filter material layer through the micro-porous aeration head. The purification tank 26 can be stacked vertically to improve the water treatment capacity. By adjusting the space of the fine treatment box 4 and the modular treatment box filled with filter material, according to the breeding scale of the shrimp seed, the shrimp seed original water biological filter treatment device can efficiently and stably provide clean water quality to meet the demand of shrimp seed cultivation, and has the characteristics of flexible adjustment and easy maintenance.

[0065] The pre-treatment box 1 is internally provided with a sedimentation tank 19, the upper end of the sedimentation tank 19 is internally provided with a grid frame 18, and the grid frame 18 is internally provided with a coarse filter screen 17 with a pore size of 100-200 μm.

[0066] The pre-treatment box 1 is internally provided with an overflow tank 20, and the pre-treatment box 1 is communicated with the fine treatment box 4 through an overflow port 7. The inner wall of the pre-treatment box 1 is provided with a fine filter screen 21 located outside the overflow port 7, and the fine filter screen 21 has a pore size of 1-5 μm.

[0067] The raw water enters the grid frame 18 of the pre-treatment box 1, and the raw water first removes large particles of suspended solids through the coarse filter screen 17 with a pore size of 100-200 μm. After passing through the sedimentation tank 19, the heavy particles such as mud and sand are settled at the bottom. The pre-treated water overflows to the overflow tank 20, and the fine filter screen 21 filters small particles. Through the overflow port 7, it enters the fine treatment box 4. In this process, the use of electrical equipment is avoided, and energy consumption is reduced. It is worth mentioning that a deslagging pipe is arranged inside the lower end of the pre-treatment box 1 when the device is arranged to discharge the sediment.

[0068] A disinfection box 2 is arranged at one side below the fine treatment box 4;

[0069] The disinfection box 2 is internally provided with a ultraviolet disinfection device 22, and the disinfection box 2 is provided with a drainage pipe 23 at one end. The inner wall of the drainage pipe 23 is provided with a water quality detector 24 and a control valve 25.

[0070] It is worth noting that the pre-treatment tank 1 needs to be cleaned regularly, the silt in the coarse filter screen 17 and the sedimentation tank 19 needs to be cleaned to prevent clogging, the fine filter screen 21 needs to be cleaned to ensure the filtering efficiency, the purification tank 26 needs to be cleaned, the water in the fine treatment tank 4 needs to be emptied, the purification tank 26 needs to be removed, the filter material layer needs to be cleaned, the ceramic and activated carbon need to be replaced if necessary, the aging of the sealing gasket needs to be checked and replaced in time, the aeration pipe and the micro-porous aeration head need to be checked regularly, the clogging needs to be cleaned, the operation state of the aeration pump 8 needs to be checked to ensure sufficient oxygen supply, the lamp tube of the ultraviolet sterilizer 22 needs to be cleaned regularly to ensure the disinfection effect, the water quality detector 24 and the control valve 25 need to be checked and the sensor accuracy needs to be calibrated;

[0071] The ultraviolet sterilizer 22 uses ultraviolet UV-C band with a wavelength of 200-280nm to destroy the DNA or RNA structure of microorganisms, so that they lose the ability to reproduce, thereby achieving the effect of sterilization and disinfection. The water in the disinfection tank 2 flows through the ultraviolet irradiation area, the ultraviolet lamp tube emits UV-C band ultraviolet light, the ultraviolet light penetrates the cell wall of microorganisms and destroys the nucleic acid structure, so that they cannot replicate and survive. The ultraviolet light inactivates bacteria, viruses, parasites and other pathogenic microorganisms, and is a pure physical disinfection method without introducing chemical substances to ensure water quality safety. The water flow can complete disinfection after passing through the ultraviolet area without the need for a residence time. It is effective against a variety of pathogenic microorganisms, including Vibrio, white spot virus and other common pathogens in shrimp farming. The water quality detector 24 monitors key parameters in water in real time through sensors. An electrochemical sensor is used to detect ammonia nitrogen content in water, an optical sensor is used to detect nitrite content, and a fluorescence sensor is used to detect dissolved oxygen content in water. Real-time data of water quality parameters are provided to ensure stable water quality. The control valve 25 is adjusted according to the detection data to optimize the water treatment process. An alarm is issued when the water quality is abnormal, and timely measures are taken. Traditional manual detection is low in efficiency and cannot reflect water quality changes in real time. Abnormal water quality is difficult to detect in time, which may cause the death of shrimp seedlings. Through the cooperative work of the ultraviolet sterilizer 22, the water quality detector 24 and the control valve 25, the disinfection tank 2 realizes efficient, intelligent and safe treatment of raw water for shrimp seedlings.

[0072] The use method of the shrimp seedling raw water biological filter treatment device is as follows:

[0073] S1: Before use, confirm that the pretreatment box 1, fine treatment box 4, disinfection box 2, motor 5, adjusting plate 3, purification box 26 and other components are firmly installed, undamaged, check whether the connecting parts such as sealing gasket, conveying pipe 6, aeration device 28 are sealed well, open the purification box 26, fill the filter material layer in order, the upper layer is the ceramic layer with a thickness of 1m, and the lower layer is the activated carbon layer with a thickness of 0.5m, inoculate nitrifying bacteria and denitrifying bacteria in the filter material layer, connect the raw water pipeline to the upper part of the grid frame 18 inside the pretreatment box 1, connect the drain pipe 23 of the disinfection box 2 to the breeding pond or water storage pond, connect the power supply, check whether the motor 5, air pump 8, aeration pump 8, ultraviolet sterilizer 22, water quality detector 24 and other equipment are normally operated;

[0074] S2: The raw water enters the pretreatment box 1, the raw water first removes large particle suspended solids through the coarse filter screen 17 with a pore size of 100-200μm, passes through the sedimentation tank 19, and the heavy particles such as mud and sand are settled to the bottom, the pretreated water overflows to the overflow tank 20, the water inside the overflow tank 20 enters the fine treatment box 4 through the overflow port 7, the fine filter screen 21 with a pore size of 1-5μm outside the overflow port 7 further filters the small particles, the filter material layer ceramic layer and activated carbon layer in the purification box 26 adsorb suspended solids and organic matter, and the nitrifying bacteria and denitrifying bacteria degrade ammonia nitrogen and nitrite, the aeration device 28 is started, the aeration pump 8 supplies oxygen to the filter material layer through the aeration pipe and the microporous aeration head with a pore size of 0.1mm, and the microbial metabolism is promoted;

[0075] S3: The motor 5 is started, the screw 9 rotates to push the nut 10, drives the adjusting plate 3 guided by the guide rod 12 to reciprocate, fills the air bag 14 through the air supply pipe 16, the air bag 14 on the outer wall of the adjusting plate 3 expands and is attached to the outer wall of the adjusting tank, avoids the breeding water treated from entering the fine treatment box 4 at the other end of the adjusting plate 3, the pressure relief valve 15 is used for adjusting the air pressure in the air bag 14, when the adjusting plate 3 moves, the air bag 14 is deflated, avoids the air bag 14 that is tightly attached to the inner wall of the fine treatment box 4 from being excessively rubbed when the adjusting plate 3 moves, and then affects the movement of the adjusting plate 3, the pressure relief valve 15 adjusts the pressure of the air bag 14 to ensure the stability of the adjusting plate 3 when moving, the water treated finely enters the disinfection box 2 through the conveying pipe 6, the ultraviolet sterilizer 22 is started, kills the pathogenic microorganisms in the water, the water after disinfection is discharged through the drain pipe 23, the water quality detector 24 monitors the water quality in real time, and the control valve 25 adjusts the water discharge according to the water quality data.

[0076] The above specific embodiments are only several preferred embodiments of the present application, based on the technical solutions of the present application and the related inspiration of the above embodiments, those skilled in the art can make various alternative improvements and combinations on the above specific embodiments.

[0077] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. The embodiments should therefore be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims with respect to the figures of the patent document.

Claims

1. A biological filter treatment device for raw water of shrimp seedlings, comprising a pretreatment tank (1), a disinfection tank (2), an adjustment plate (3), a fine treatment tank (4), a motor (5) and a purification tank (26), characterized in that: The fine treatment box (4) is provided with equidistantly distributed purification boxes (26), the fine treatment box (4) is provided with an adjustment plate (3), the rear end of the fine treatment box (4) is fixed with a motor (5), the output end of the motor (5) is provided with a screw (9), the upper end of the adjustment plate (3) is provided with a nut (10) threadedly mounted with the screw (9), the outer wall of the adjustment plate (3) is sleeved with an air bag (14), the upper end of the adjustment plate (3) is provided with an air pump (8), the air pump (8) is connected to the air bag (14) and is provided with an air supply pipe (16), the air supply pipe (16) is provided with a pressure relief valve (15), a disinfection box (2) is provided on one side below the fine treatment box (4), the inner wall of the fine treatment box (4) and the outer wall of the purification box (26) are both provided with sealing gaskets, the lower end side wall of the purification box (26) is provided with an overflow hole (27), and a filter material layer is provided inside the purification box (26).

2. The biological filter treatment device for raw water of shrimp seedlings according to claim 1, characterized in that: The upper end of the fine processing box (4) is provided with symmetrically distributed guide rods (12), and the adjusting plate (3) is embedded with a sliding sleeve (11) which is symmetrically distributed and slidably sleeved on the outer wall of the guide rod (12). The front end of the fine processing box (4) is provided with a bearing bracket (13), and one end of the screw rod (9) is rotatably inserted into the bearing bracket (13).

3. The biological filter treatment device for raw water of shrimp seedlings according to claim 1, characterized in that: One end of the fine processing box (4) is provided with equidistantly distributed delivery pipes (6) whose opening and closing are controlled by a sealing plug.

4. The biological filter treatment device for raw water of shrimp seedlings according to claim 1, characterized in that: An aeration device (28) is provided at one end of the fine treatment box (4), and the aeration device (28) includes an aeration pump (8), an aeration pipe and a microporous aeration head, and the microporous aeration head is embedded and installed inside the lower end of the fine treatment box (4).

5. The biological filter treatment device for raw water of shrimp seedlings according to claim 4, characterized in that: The aeration tube is made of PVC, and the aperture of the microporous aeration head is 0.1 mm.

6. The biological filter treatment device for raw water of shrimp seedlings according to claim 1, characterized in that: The filter material layer comprises a ceramsite layer and an activated carbon layer, which are filled in layers, with the ceramsite layer on the top and the activated carbon layer on the bottom. Nitrifying bacteria and denitrifying bacteria are inoculated in the filter material layer.

7. The biological filter treatment device for raw water of shrimp seedlings according to claim 1, characterized in that: A sedimentation tank (19) is provided inside the pretreatment box (1), a grid frame (18) is provided inside the upper end of the sedimentation tank (19), a coarse filter (17) is provided inside the grid frame (18), and the pore size of the coarse filter (17) is 100-200 μm.

8. The biological filter treatment device for raw water of shrimp seedlings according to claim 6, characterized in that: The total height of the filter material layer is 1.5m, the thickness of the ceramsite layer is 1m, and the thickness of the activated carbon layer is 0.5m.

9. The biological filter treatment device for raw water of shrimp seedlings according to claim 1, characterized in that: An overflow pool (20) is provided inside the pretreatment box (1), an overflow port (7) is connected between the pretreatment box (1) and the fine treatment box (4), and a fine filter (21) is provided on the inner wall of one side of the pretreatment box (1) and is located outside the overflow port (7), wherein the pore size of the fine filter (21) is 1-5 μm.

10. The biological filter treatment device for raw water of shrimp seedlings according to claim 1, characterized in that: An ultraviolet disinfector (22) is provided inside the disinfection box (2), a drain pipe (23) is provided at one end of the disinfection box (2), and a water quality detector (24) and a control valve (25) are provided inside the drain pipe (23); The steps for using the biological filter treatment device for raw water of shrimp seedlings are as follows: S1: Before use, confirm that the pretreatment box (1), fine treatment box (4), disinfection box (2), motor (5), adjustment plate (3), purification box (26) and other components are firmly installed and without damage, check whether the sealing gasket, delivery pipe (6), aeration device (28) and other joints are well sealed, open the purification box (26), fill the filter material layer in order, the upper layer is a ceramsite layer with a thickness of 1m, and the lower layer is an activated carbon layer with a thickness of 0.5m, and uniformly inoculate nitrifying bacteria and denitrifying bacteria in the filter material layer, connect the raw water pipeline to the top of the grid frame (18) inside the pretreatment box (1), connect the drainage pipe (23) of the disinfection box (2) to the breeding pond or water storage tank, turn on the power, and check whether the motor (5), air pump (8), aeration pump (8), ultraviolet disinfector (22), water quality detector (24) and other equipment are operating normally; S2: The raw water enters the pretreatment tank (1). The raw water first passes through a coarse filter (17) with a pore size of 100-200 μm to remove large suspended solids. After passing through a sedimentation tank (19), heavy particles such as silt settle to the bottom. The pretreated water overflows into the overflow tank (20). The water inside the overflow tank (20) enters the fine treatment tank (4) through the overflow port (7). The fine filter (21) with a pore size of 1-5 μm outside the overflow port (7) further filters tiny particles. The filter material layer (ceramsite layer and activated carbon layer) in the purification tank (26) adsorbs suspended solids and organic matter. At the same time, nitrifying bacteria and denitrifying bacteria degrade ammonia nitrogen and nitrite. The aeration device (28) is started. The aeration pump (8) supplies oxygen to the filter material layer through the aeration pipe and the microporous aeration head with a pore size of 0.1 mm to promote microbial metabolism. S3: Start the motor (5), the screw (9) rotates to push the nut (10), and drives the adjustment plate (3) guided by the guide rod (12) to move back and forth, and inflate the air bag (14) through the air supply pipe (16). The air bag (14) on the outer wall of the adjustment plate (3) expands and fits with the outer wall of the adjustment tank, preventing the treated aquaculture water from entering the fine treatment box (4) at the other end of the adjustment plate (3). The pressure relief valve (15) is used to adjust the air pressure in the air bag (14). When the adjustment plate (3) moves, the air bag (14) is emptied to prevent the adjustment plate (3) from When the airbag (14) is inflated and closely attached to the inner wall of the fine treatment box (4), excessive friction occurs, thereby affecting the movement of the adjustment plate (3). The pressure relief valve (15) adjusts the pressure of the airbag (14) to ensure the stability of the adjustment plate (3) when it moves. The finely treated water enters the disinfection box (2) through the delivery pipe (6). The ultraviolet disinfector (22) is started to kill pathogenic microorganisms in the water. The disinfected water is discharged through the drain pipe (23). The water quality detector (24) monitors the water quality of the outlet water in real time. The control valve (25) adjusts the discharge volume according to the water quality data.

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