Leiocassis longirostris breeding tail water purification device

Abstract

The invention relates to the technical field of leiocassis longirostris breeding, and particularly discloses a leiocassis longirostris breeding tail water purification device which comprises a main tank body, a first filter tank, an aeration tank, a second filter tank, a filter residue tank and a circulating tank are sequentially arranged in the main tank body, the first filter tank is separated from the aeration tank through a first filter plate, and the second filter tank is communicated with the circulating tank through a single channel. The aeration tank and the second filter tank are separated through an overflow weir, an aeration mechanism is arranged in the aeration tank, a plurality of second filter plates are obliquely arranged in the second filter tank, filter membranes are arranged on the second filter plates, a cleaning mechanism is arranged above the filter residue tank, and filter residues on the filter membranes are cleaned through the cleaning mechanism; the filter residue tank is communicated with the second filter tank through a plurality of rectangular grooves corresponding to the tail end of the second filter plate; impurities with different particle sizes in aquaculture tail water can be intercepted step by step, the purification precision of the tail water is remarkably improved, and the water quality requirement of circulating aquaculture is met.

Description

Technical Field

[0001] The invention relates to the technical field of long-snouted catfish breeding, and more particularly to a long-snouted catfish breeding tail water purification device. Background Art

[0002] Longnose catfish is an important freshwater economic fish in my country. Its tender meat and nutritious properties have led to a growing aquaculture industry. However, with the promotion of intensive, high-density aquaculture, the development of longnose catfish aquaculture tailwater purification technology has become an urgent need in the industry.

[0003] Patent No. CN114772865A is a method for purifying the tail water of aquaculture of long-snouted catfish. The following scheme is proposed, including a long-snouted catfish aquaculture tail water purification system, including a box body, the interior of which is installed with a horizontal partition, a drainage plate fixed to one end of the top of the partition, a groove opened at the other end of the top of the partition, a blocking mechanism arranged inside the groove and movably connected to the partition, a discharge hole arranged at the end of the groove away from the drainage plate, and a breeding control mechanism arranged between the groove and the drainage plate and connected to the box body. The inner wall of the box is provided with a guide channel for adjusting the state of the breeding control mechanism. The present invention can purify the aquaculture tail water, realize the recycling of aquaculture tail water, quickly purify the aquaculture water, and at the same time simulate the natural growth environment of long-snouted catfish, improve the growth environment of long-snouted catfish, and improve the growth and breeding efficiency of long-snouted catfish.

[0004] However, in actual applications, the filtration effect of the long-snouted catfish aquaculture tailwater purification system in the existing technology is not ideal, and it is difficult to efficiently remove various impurities and pollutants in the tailwater. The water quality stability after purification is poor, and it can have an adverse effect on the growth of long-snouted catfish when recycled. The degree of automation of the device is not high, and a lot of manual operation is required for cleaning, maintenance and other work, which increases the aquaculture cost and manpower burden. For this reason, we propose a long-snouted catfish aquaculture tailwater purification device. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a long-snout catfish aquaculture tail water purification device to solve the problems existing in the above-mentioned background technology.

[0006] The present invention provides the following technical solution: a long-snouted catfish aquaculture tail water purification device, comprising a main tank body, wherein a first filter tank, an aeration tank, a second filter tank, a filter residue tank and a circulation tank are sequentially arranged inside the main tank body, the first filter tank and the aeration tank are separated by a first filter plate, the second filter tank and the circulation tank are connected through a single channel, the aeration tank and the second filter tank are separated by an overflow weir, an aeration mechanism is arranged in the aeration tank, a plurality of second filter plates are obliquely arranged in the second filter tank, a filter membrane is arranged on the second filter plate, a cleaning mechanism is arranged above the filter residue tank, filter residue on the plurality of filter membranes is cleaned by the cleaning mechanism, the filter residue tank and the second filter tank are connected by a plurality of rectangular grooves at the ends corresponding to the second filter plates, a closing mechanism is arranged in the filter residue tank, the rectangular grooves are opened and closed by the closing mechanism, and the filter residue is cleaned into the filter residue tank in cooperation with the cleaning mechanism.

[0007] The cleaning mechanism includes several scrapers, two first linkage rods, two support plates, a reciprocating assembly and a driving assembly. The several scrapers are respectively located on the upper side of the corresponding filter membranes, and the several scrapers are fixedly connected between the two first linkage rods. The support plates are symmetrically fixed at the edge of the main pool body. The two support plates are fixedly connected to the first slide rail on the side close to each other. Slide seats are provided on the two first slide rails. The two first linkage rods slide through the support plates and extend upward. The reciprocating assembly is controlled by the driving assembly to drive the first linkage rod to move back and forth synchronously, so as to control the scraper to scrape off the filter residue.

[0008] Furthermore, the reciprocating components are provided with two groups, which are respectively arranged on corresponding support plates. Each group of reciprocating components includes a synchronous wheel and a synchronous belt. There are two synchronous wheels, which are both rotatably connected to the side of the support plate. The synchronous wheel close to the filter residue pool is lower in height. The synchronous belt drive is connected between the two synchronous wheels, and the upper end of the first linkage rod is rotatably installed on the side of the synchronous belt.

[0009] Furthermore, the drive assembly includes a first servo motor, a first gear, a second gear and a linkage shaft. The first servo motor is fixedly connected to the side of one of the support plates, and its output end is fixedly connected to one of the synchronous wheels. The linkage shaft is rotatably connected between the two support plates, and its two ends are fixedly connected to the second gear. Two first gears are provided, which are respectively fixedly connected to another symmetrical synchronous wheel, and the adjacent first gears are meshed with the second gears.

[0010] Furthermore, the closing mechanism includes an electric push rod, two second slide rails, a second linkage rod and a baffle. The electric push rod and the two second slide rails are fixedly connected to the upper side of the filter residue pool. The second linkage rod is fixedly connected to the output end of the electric push rod. The surfaces of the two second slide rails are slidably connected to the sleeves. The second linkage rod is fixedly connected between the two sleeves. Several baffles are provided, which are respectively engaged in the corresponding rectangular grooves. The bottoms of the two sleeves are fixedly connected to the third linkage rod. Several baffles are fixedly connected to the third linkage rod through reinforcement.

[0011] Furthermore, the aeration mechanism includes a blower, a first air pipe and a second air pipe. The blower is arranged outside the main tank body, the second air pipe is installed at the bottom of the aeration tank, the first air pipe is connected between the blower and the second air pipe, and several aeration heads are installed on the upper side of the second air pipe.

[0012] Furthermore, the pore diameter of the first filter plate is 1-2 mm, which is used for preliminary filtration of larger particle impurities in the tail water. The filter membrane adopts a composite ultrafiltration membrane with a pore size of 0.01-0.1 μm, which can effectively filter fine particles, colloids and some microorganisms in the tail water.

[0013] Furthermore, a sewage discharge mechanism is provided at the bottom of the first filter tank and the filter residue tank, and each group of the sewage discharge mechanism includes a bottom trough, a second servo motor and a screw conveyor. The bottom trough is provided at the bottom of the first filter tank and the filter residue tank, and the screw conveyor is rotatably connected to the bottom trough. The second servo motor is fixedly installed on the outside of the bottom trough, and its output end is fixedly connected to the screw conveyor, which is used to drive the screw conveyor to rotate and discharge the filter residue.

[0014] Furthermore, a plurality of water sensors are installed in the main pool body to monitor the water quality parameters of each pool body, and a plurality of drainage plates are installed on the upper side of the overflow weir.

[0015] Technical effects and advantages of the present invention: 1. This invention utilizes a multi-stage purification structure consisting of a first filter tank, an aeration tank, a second filter tank, and a circulation tank, combined with a graded filtration design using a first filter plate and filter membrane. This facilitates the progressive interception of impurities of varying particle sizes in aquaculture tailwater, significantly improving tailwater purification accuracy and meeting the water quality requirements of recirculating aquaculture. Furthermore, the coordinated coordination of the cleaning mechanism and the sealing mechanism, with the scraper of the cleaning mechanism directional scraping away filter residue along the inclined surface of the filter membrane, facilitates the precise removal of filter residue into the filter residue tank without affecting the filtration process, preventing filter membrane clogging, maintaining stable filtration efficiency, and reducing the labor cost of manual cleaning.

[0016] 2. This invention utilizes a one-way scraping blade to push the filter residue trapped on the membrane surface toward the end of the second filter plate, preventing the residue from scattering or remaining due to upward scraping, and ensuring that there are no blind spots on the membrane surface. Furthermore, the membrane is made of high-precision material, and the one-way, tightly fitting scraping method maintains uniform contact pressure, reducing physical damage to the membrane and extending its service life. The one-way scraping method also avoids reverse disturbances on the membrane surface during the scraping process, preventing trapped pollutants from re-entering the tailwater. This ensures that the filtration effect of the second filter tank is not disturbed by the cleaning operation, ensuring the stability of the tailwater purification efficiency.

[0017] 3. This invention incorporates an aeration mechanism and a sewage discharge mechanism, which facilitates increasing the dissolved oxygen content in the water. This promotes microbial degradation of organic pollutants in the tailwater, enhancing the biological purification effect and synergizing with physical filtration to further reduce tailwater pollutant concentrations. A second servo motor drives the screw conveyor to automatically discharge filter residue, while water sensors monitor the water quality parameters of each tank in real time. This facilitates automated filter residue removal and water quality monitoring, reduces manual intervention, ensures stable operation of the device, and provides accurate water quality data support for tailwater recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a side structural schematic diagram of the present invention; Figure 3 It is a cross-sectional view of the overall structure of the present invention; Figure 4 A schematic diagram of the cleaning mechanism of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of the structure at A; Figure 6 is a schematic diagram of the second filter plate of the present invention; Figure 7 Schematic diagram of the closing mechanism of the present invention.

[0019] The accompanying drawings are marked as follows: 1. Main tank body; 101. First filter tank; 102. Aeration tank; 103. Second filter tank; 104. Filter residue tank; 1041. Rectangular trough; 105. Circulation tank; 1051. Single channel; 2. First filter plate; 3. Aeration mechanism; 301. Blower; 302. First air pipe; 303. Second air pipe; 304. Aeration head; 4. Overflow weir; 401. Drain plate; 5. Second filter plate; 501. Filter membrane; 6. Cleaning mechanism; 601. Scraper; 602. First linkage rod; 603 , support plate; 604, first slide rail; 605, slide seat; 606, synchronous wheel; 607, synchronous belt; 608, first servo motor; 609, first gear; 6010, second gear; 6011, linkage shaft; 7, closing mechanism; 701, electric push rod; 702, second slide rail; 703, second linkage rod; 704, sleeve; 705, third linkage rod; 706, baffle; 707, reinforcement; 8, sewage discharge mechanism; 801, second servo motor; 802, screw conveyor; 9, water sensor. DETAILED DESCRIPTION

[0020] The technical solutions of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples. The long-snouted catfish aquaculture tail water purification device involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] Reference Figure 1-Figure 7 The present invention provides a long snout catfish aquaculture tail water purification device, comprising a main tank body 1, wherein a first filter tank 101, an aeration tank 102, a second filter tank 103, a filter residue tank 104 and a circulation tank 105 are sequentially arranged inside the main tank body 1, the first filter tank 101 and the aeration tank 102 are separated by a first filter plate 2, the second filter tank 103 and the circulation tank 105 are connected through a single channel 1051, the aeration tank 102 and the second filter tank 103 are separated by an overflow weir 4, an aeration mechanism 3 is arranged in the aeration tank 102, and the second filter tank 103 is connected to the circulation tank 105 through a single channel 1051. A number of second filter plates 5 are obliquely arranged in the filter tank 103, and filter membranes 501 are arranged on the second filter plates 5. A cleaning mechanism 6 is arranged above the filter residue tank 104, and the filter residue on the number of filter membranes 501 is cleaned by the cleaning mechanism 6. The filter residue tank 104 and the second filter tank 103 are connected by a number of rectangular grooves 1041 at the ends of the corresponding second filter plates 5. A closing mechanism 7 is arranged in the filter residue tank 104, and the rectangular grooves 1041 are opened and closed by the closing mechanism 7, and the filter residue is cleaned into the filter residue tank 104 in cooperation with the cleaning mechanism 6.

[0022] The cleaning mechanism 6 includes several scrapers 601, two first linkage rods 602, two support plates 603, a reciprocating assembly and a driving assembly. Several scrapers 601 are respectively located on the upper side of the corresponding filter membrane 501, and several scrapers 601 are fixedly connected between the two first linkage rods 602. The support plates 603 are symmetrically fixed at the edge of the main pool body 1. The two support plates 603 are fixedly connected to the first slide rail 604 on the side close to each other. Slide seats 605 are provided on the two first slide rails 604. The two first linkage rods 602 slide through the support plates 603 and extend upward. The reciprocating assembly is controlled by the driving assembly to drive the first linkage rod 602 to move back and forth synchronously, so as to control the scraper 601 to scrape off the filter residue.

[0023] In this embodiment, it should be specifically explained that: the first filter 101, the aeration tank 102, the second filter 103 and the filter residue tank 104 are adjacent to each other in sequence, and the second filter 103 is adjacent to the circulation tank 105. The tail water first enters the first filter 101. The first filter plate 2 not only plays a physical separation role, but also can perform preliminary filtration on the incoming aquaculture tail water, intercepting larger solid impurities in the tail water, such as leftover bait, fish feces particles, etc. The filtered tail water flows into the second filter 103 through the first filter plate 2; the tail water in the aeration tank 102 enters the second filter 103 by overflow, and the height of the overflow weir 4 determines the effective water level in the aeration tank 102. When the tail water accumulates in the aeration tank 102 to a level higher than the overflow weir 4, it will overflow along the overflow weir 4 into the second filter tank 103. This design can ensure that the tail water has sufficient residence time in the aeration tank 102, ensuring that the aeration mechanism 3 can fully function. The second filter plate 5 in the second filter tank 103 is set in an inclined state, and its inclination angle is preferably 30°-45°. The inclined design uses gravity to facilitate the filter residue retained on the surface of the filter membrane 501 to slide toward the end, and cooperate with the cleaning mechanism 6 to more efficiently remove the filter residue. The filter membrane 501 on the filter membrane 501 adopts high-precision filtering material, which can further remove fine suspended particles, colloids and other pollutants in the tail water. The single channel 1051 is responsible for connecting the second filter tank 103 and the circulation tank 105 The tail water after deep filtration in the second filter tank 103 enters the circulation tank through the single channel 1051. The water sensor 9 in the circulation tank monitors the water quality in real time. The tail water that meets the standards is transported back to the breeding system through the water pump for recycling; the filter residue tank 104 is used to collect the filter residue that slides from the end of the filter membrane 501. It is connected to the second filter tank 103 through the rectangular groove 1041, and the switch of the rectangular groove 1041 is controlled by the closing mechanism 7. When the cleaning mechanism 6 cleans the filter residue on the filter membrane 501, the closing mechanism 7 opens the rectangular groove 1041, and the filter residue enters the filter residue tank 104 along the inclined filter membrane 501 through the rectangular groove 1041. After cleaning, the rectangular groove 1041 is closed to prevent the tail water from flowing directly into the filter residue tank 104 without treatment.

[0024] The main difference between this embodiment and the prior art is that this embodiment adopts a collaborative design of multi-stage partition purification combined with automated cleaning and closed control, specifically: Accuracy of zoned purification: The first filter 101, the aeration tank 102, the second filter 103, the filter residue tank 104 and the circulation tank 105 are sequentially arranged inside the main tank body 1, and the single channel 1051 is clearly connected only to the second filter 103 and the circulation tank 105, forming a targeted tailwater purification path to avoid cross-interference of pollutants in each link; at the same time, the first filter plate 2 is used to separate the first filter 101 and the aeration tank 102 to achieve preliminary filtration, and the aeration tank 102 controls the tailwater overflow to the second filter 103 through the overflow weir 4 to ensure sufficient aeration reaction time.

[0025] The linkage between filtration and cleaning: the second filter plate 5 tiltedly arranged in the second filter tank 103 cooperates with the filter membrane 501 to achieve deep filtration. At the same time, the filter membrane 501 is cleaned in a targeted manner by the cleaning mechanism 6 above the filter residue tank 104. During the cleaning process, the closing mechanism 7 in the filter residue tank 104 controls the switch of the rectangular groove 1041, so that the filter residue falls accurately into the filter residue tank 104, which solves the problem of easy clogging of the filter component and incomplete cleaning of the filter residue in the prior art.

[0026] Automation of process control: Through the structural design and coordination of overflow control of each tank, cleaning mechanism drive, and closing mechanism linkage, manual intervention is reduced, purification efficiency and stability are improved. Compared with existing technologies, it can better adapt to the tail water purification needs of intensive aquaculture.

[0027] The above structure is the main structure of this embodiment, which solves the problems of low filtration efficiency, easy clogging of filter membrane, inconvenient cleaning of filter residue and poor coordination of various processing links in the purification process of long-snouted catfish breeding tail water. The basic frame of the main pool body 1, the wall masonry structure of each pool body, the conventional connection method of the pipeline, etc. are existing structures. The specific size parameters of these basic frames, the masonry materials of the walls, and the splicing process and connection method are not described in detail in this embodiment. In addition, the internal circuit structure and working principle of equipment such as the blower 301, the first servo motor 608, and the electric push rod 701 also belong to the existing technology. Therefore, this application does not make detailed limitations.

[0028] Reference Figure 3-Figure 6 , there are two groups of reciprocating components, which are respectively arranged on the corresponding support plates 603, each group of reciprocating components includes a synchronous wheel 606 and a synchronous belt 607, there are two synchronous wheels 606, both of which are rotatably connected to the side of the support plate 603, the synchronous wheel 606 close to the filter residue pool 104 is lower, the synchronous belt 607 is transmission-connected between the two synchronous wheels 606, and the upper end of the first linkage rod 602 is rotatably mounted on the side of the synchronous belt 607; the driving component includes a first servo motor 608, a first gear 609, a second gear 6010 and a linkage shaft 6011, the first servo motor 608 is fixedly connected to the side of one of the support plates 603, and its output end is fixedly connected to one of the synchronous wheels 606, the linkage shaft 6011 is rotatably connected between the two support plates 603, and its two ends are fixedly connected to the second gear 6010, there are two first gears 609, which are respectively fixedly connected to the other symmetrical synchronous wheel 606, and the adjacent first gears 609 are meshed with the second gears 6010.

[0029] In this embodiment, it should be specifically explained that the two groups of reciprocating components are matched one by one with the corresponding support plates 603 to ensure the synchronous operation stability of the cleaning mechanism 6 on both sides of the second filter tank 103. In each group of reciprocating components, the two synchronous wheels 606 are respectively close to the side edges of the corresponding support plates 603, and the height of the synchronous wheels close to the filter residue tank 104 side is slightly lower, forming an inclined transmission track, which is adapted to the inclination angle of the second filter plate 5. The synchronous belt 607 stably transmits the transmission to form a closed-loop transmission structure. The upper end of the first linkage rod 602 is installed on the side of the synchronous belt through a bearing. When the synchronous belt is running, it drives the first linkage rod 602 to move back and forth along the first slide rail 604 to ensure that the scraper 601 is always in close contact with the surface of the filter membrane 501 during the cleaning process. The synchronous belt 607 is driven, and the reciprocating movement forms a height difference, which can achieve the effect of one-way scraping. The one-way scraping continuously applies stable pressure to the side of the filter residue tank 104 along the inclined direction of the filter membrane 501 surface, cutting the surface of the filter membrane 501 The remaining filter residue is pushed to the end of the second filter plate 5 to avoid scattering or residue of the filter residue due to oblique scraping, ensuring that there is no dead corner on the filter membrane surface; and the filter membrane 501 is made of high-precision material. If oblique scraping is adopted, the contact angle and pressure between the scraper 601 and the filter membrane 501 will change, which may cause local wear or tear of the filter membrane; while the one-way close-fitting scraping method maintains uniform contact pressure, reduces physical damage to the filter membrane, and extends its service life; due to the synchronous wheel 606 close to the filter residue pool 104 The height is relatively low, and the one-way scraping utilizes the synergistic effect of gravity and mechanical force to make the filter residue slide smoothly along the inclined direction to the rectangular groove 1041, and finally enter the filter residue pool 104, avoiding the filter residue backflow to the cleaned area due to the oblique scraping, thereby ensuring the high efficiency of filter residue collection; the one-way scraping avoids reverse disturbance on the surface of the filter membrane 501 during the scraping process, preventing the intercepted pollutants from being re-mixed into the tail water, ensuring that the filtering effect of the second filter tank 103 is not disturbed by the cleaning operation, and ensuring the stability of the tail water purification efficiency.

[0030] The first servo motor 608 in the drive assembly provides power for the entire cleaning mechanism. The linkage shaft 6011 passes through the two support plates 603 horizontally and is rotatably connected thereto. The two ends are respectively fixed to the synchronous wheels 606 on both sides to ensure that the rotation speed of the synchronous wheels 606 on both sides is consistent; the two first gears 609 are respectively fixed at the axis of the other synchronous wheel 606 on both sides, and the second gear 6010 is engaged with the adjacent first gear 609 to form a gear transmission structure to ensure that the movement direction of the synchronous belts 607 on both sides is consistent, avoiding the first linkage rod 602 from offset or jamming during movement; the coordinated design of the reciprocating assembly and the drive assembly enables the two sets of reciprocating structures to achieve synchronous transmission, ensuring that the scraper 601 is evenly stressed during the cleaning process, which not only improves the cleaning efficiency of the filter membrane 501, but also reduces mechanical wear and extends the service life of the equipment.

[0031] Reference Figure 3 and Figure 7 The closing mechanism 7 includes an electric push rod 701, two second slide rails 702, a second linkage rod 703 and a baffle 706. The electric push rod 701 and the two second slide rails 702 are fixedly connected to the upper side of the filter residue pool 104. The second linkage rod 703 is fixedly connected to the output end of the electric push rod 701. The surfaces of the two second slide rails 702 are slidably connected to the sliding sleeves 704. The second linkage rod 703 is fixedly connected between the two sliding sleeves 704. A number of baffles 706 are provided, which are respectively engaged in the corresponding rectangular grooves 1041. The bottoms of the two sliding sleeves 704 are fixedly connected to the third linkage rod 705. Several baffles 706 are fixedly connected to the third linkage rod 705 through reinforcement members 707.

[0032] When the second lever 702 is engaged with the second lever 704, the lever 702 is engaged with the second lever 704 and the second lever 704 engages with the lever 704, thereby ensuring the stability of the movement trajectory. 41 flows back to the second filter tank 103; the inner walls of the two sliding sleeves 704 are smooth and the sliding resistance is small. The third linkage rod 705 fixed at the bottom firmly connects the several baffles 706 with the third linkage rod 705 to ensure that the baffles move synchronously with the sliding sleeve; when the cleaning mechanism 6 starts to clean the filter membrane 501, the extended end of the electric push rod 701 pushes the second linkage rod 703 to move away from the second filter tank 103, driving the sliding sleeve 704 to slide along the second slide rail 702, and then the baffle 706 is driven to move by the third linkage rod 705, so that the baffle 706 is disengaged from the rectangular groove 1041, opening 1401 to allow the filter residue to enter the filter residue tank 104; after cleaning is completed, the extended end of the electric push rod returns to its original position, driving the baffle 706 to reset and engage in the rectangular groove 1041 to achieve closure. The whole process responds quickly and forms a linkage with the cleaning mechanism 6.

[0033] Reference Figure 2-Figure 3 The aeration mechanism 3 includes a blower 301, a first air pipe 302 and a second air pipe 303. The blower 301 is arranged outside the main tank body 1, and the second air pipe 303 is installed at the bottom of the aeration tank 102. The first air pipe 302 is connected between the blower 301 and the second air pipe 303. Several aeration heads 304 are installed on the upper side of the second air pipe 303.

[0034] In this embodiment, it should be specifically explained that: the blower 301 uses a Roots blower or a centrifugal blower, and its power is determined according to the volume of the aeration tank 102 and the required air supply to ensure that a sufficient amount of air can be stably provided. The first air pipe 302 uses a corrosion-resistant PVC pipe or a stainless steel pipe, one end of which is sealed and connected to the air outlet of the blower 301, and the other end passes through the side wall of the main tank body 1 and extends to the inside of the aeration tank 102, and is used to transport the air generated by the blower 301 into the aeration tank 102. The second air pipe 303 is horizontally installed at the bottom of the aeration tank 102 and is fixed to the bottom of the tank by a bracket. The number of the second air pipes 303 is set according to the width of the aeration tank, usually 2-4, and is distributed parallel to each other. Adjacent second air pipes 303 are installed horizontally at the bottom of the aeration tank 102 and are fixed to the bottom of the tank by a bracket. The spacing between the tubes 303 is uniform, ensuring that the aeration range covers the entire bottom of the aeration tank. The aeration heads 304, which use microporous aeration disks or aeration membranes, are evenly installed on the upper side of the second air pipe 303 and are distributed in a matrix pattern in the aeration tank 102. The aeration heads 304 disperse air into tiny bubbles, increasing the contact area between air and water, improving the oxygen dissolution efficiency, and ensuring that the dissolved oxygen content of the water in the aeration tank 102 meets the needs of microorganisms to degrade pollutants, thereby improving the tailwater purification effect. The first air pipe 302 and the second air pipe 303 are sealed with a three-way joint to ensure no leakage during gas transportation. Water-resistant and corrosion-resistant materials are selected to adapt to the water environment of aquaculture tailwater and extend the service life.

[0035] Reference Figure 3 The pore diameter of the first filter plate 2 is 1-2 mm, which is used to preliminarily filter larger particle impurities in the tail water. The filter membrane 501 adopts a composite ultrafiltration membrane with a pore size of 0.01-0.1 μm, which can effectively filter fine particles, colloids and some microorganisms in the tail water.

[0036] In this embodiment, it is necessary to specifically explain that: the pore diameter of the first filter plate 2 is set to 1-2 mm, which is specifically adapted to the larger particle impurities commonly found in the tail water of long-snout catfish farming, such as leftover bait debris, fish feces lumps, etc., and the initial filtration is achieved through physical interception, and impurities with a particle size greater than 1 mm are intercepted to prevent them from entering the subsequent aeration tank 102 and causing blockage of the aeration head 304 or affecting the activity of microorganisms. At the same time, the load is reduced for subsequent deep filtration. The pore size of the filter membrane 501 is precisely controlled at 0.01-0.1 μm. This pore size range effectively intercepts the fine particles and colloidal substances remaining in the tail water after preliminary filtration, such as protein colloids, humus colloids and some The filter membrane 501 can separate microorganisms, further reduce the concentration of suspended solids and microbial content in the tail water, so that the tail water purification accuracy meets the needs of recirculating aquaculture; the first filter plate 2 and the filter membrane 501 form a graded filtration system of coarse filtration + fine filtration, which ensures the progressiveness of filtration efficiency and avoids the clogging problem caused by excessive load of a single filter component. It cooperates with the biodegradation effect of the aeration tank 102 to significantly improve the tail water purification effect; the filter membrane 501 is made of a composite material that is resistant to pollution and aging, such as PVDF composite membrane, which can withstand the erosion of organic matter, ammonia nitrogen and other components in the aquaculture tail water. With the regular cleaning of the cleaning mechanism 6, it can maintain stable filtration performance and extend the service life.

[0037] Reference Figure 1 and Figure 3 A sewage discharge mechanism 8 is provided at the bottom of the first filter tank 101 and the filter residue tank 104. Each sewage discharge mechanism 8 includes a bottom trough, a second servo motor 801 and a screw conveyor 802. The bottom trough is provided at the bottom of the first filter tank 101 and the filter residue tank 104. The screw conveyor 802 is rotatably connected to the bottom trough. The second servo motor 801 is fixedly installed outside the bottom trough, and its output end is fixedly connected to the screw conveyor 802, which is used to drive the screw conveyor 802 to rotate and discharge the filter residue.

[0038] In this embodiment, it should be specifically explained that: the bottom trough and the bottom of the first filter tank 101 and the filter residue tank 104 form an integrated cavity to temporarily store the filter residue separated during the filtration process, such as metal debris and solid particles in the hydraulic oil. The inner wall of the bottom trough adopts an inclined design, which can guide the filter residue to gather at the position of the screw conveyor 802, prevent the filter residue from remaining in the corner, and ensure thorough cleaning. The screw conveyor 802 is rotatably connected to the bottom trough through a bearing, and its shape is adapted to the inner wall of the bottom trough. When the second servo motor 801 drives the screw conveyor 802 to rotate, the screw conveyor 802 pushes the filter residue in the bottom trough axially to the slag discharge port, or the scraper scrapes the filter residue to the slag discharge area through rotation, thereby realizing directional transportation of the filter residue, which is more efficient and more thorough than manual cleaning, and is particularly suitable for slag discharge needs in closed or narrow spaces.

[0039] Reference Figure 1Several water sensors 9 are installed in the main pool body 1 to monitor the water quality parameters of each pool body, and several guide plates 401 are installed on the upper side of the overflow weir 4.

[0040] In this embodiment, it should be specifically explained that the function of the water sensor 9 is to collect key water quality parameters of each pool in real time, including but not limited to pH, turbidity, temperature, pollutant concentration, etc. These sensors directly contact the liquid in the pool through probes or sensing elements, convert the physical or chemical properties of the water into electrical signals, and transmit them to the control system to realize dynamic monitoring of the water quality status; when the water quality parameters are monitored to exceed the preset threshold, the system automatically issues an alarm to prompt the operator to replace or process the liquid in time to avoid the normal operation of the actuator due to water quality deterioration. It is especially suitable for the protection of hydraulic systems that are sensitive to the cleanliness of the medium. The diversion plate 401 guides the tail water to flow in a dispersed manner to prevent the tail water from flowing in a concentrated manner.

[0041] Working principle of the present invention: The main problem solved by this embodiment is: by setting up a multi-stage filtration structure, cooperating with an automated cleaning mechanism, a sealing mechanism and a sewage discharge mechanism, the problems of the long-snout catfish aquaculture tail water purification device in the prior art, such as unsatisfactory filtration effect, poor stability of purified water quality, easy clogging of the filter membrane, low degree of device automation, high aquaculture costs and manpower burden, are solved.

[0042] The specific steps are as follows: S1, preliminary filtration stage: The aquaculture tail water first enters the first filter tank 101, and the first filter plate 2 intercepts larger particles of impurities in the tail water, such as leftover bait and fish feces clumps. The tail water after preliminary filtration passes through the first filter plate 2 and flows into the aeration tank 102. At the same time, the sewage discharge mechanism 8 at the bottom of the first filter tank 101 is regularly started, and the second servo motor 801 drives the screw conveyor 802 to rotate and discharge the filter residue in the bottom tank; S2, aeration purification stage: The aeration mechanism 3 in the aeration tank 102 operates, and the blower 301 delivers air to the aeration head 304 through the first air pipe 302 and the second air pipe 303, generating a large number of bubbles that fully contact the tail water, promoting the activity of microorganisms in the water and degrading organic pollutants. The tail water stays in the aeration tank 102 until the water level is higher than the overflow weir 4, and then overflows along the guide plate 401 to the second filter tank 103; S3, deep filtration stage: The filter membrane 501 on the second filter plate 5 arranged obliquely in the second filter tank 103 uses a composite ultrafiltration membrane to further filter fine particles, colloids and some microorganisms. The purified tail water enters the circulation tank 105 through the single channel 1051 and is monitored in real time by the water sensor 9. The qualified water is circulated back to the aquaculture system; S4, cleaning and residue collection stage: When the residue on the surface of the filter membrane 501 accumulates to a certain extent, the cleaning mechanism 6 is started: the output end of the first servo motor 608 drives the synchronous wheel 606 fixed thereto to rotate, and the other synchronous wheel 606 is driven to rotate under the transmission action of the synchronous belt 607, and the synchronous wheel 606 on the other side is driven to rotate under the power transmission action of the first gear 609, the second gear 6010 and the linkage shaft 6011, and then the two first linkage rods 602 are driven to slide synchronously along 604, and the scraper 601 scrapes the residue along the inclined surface of the filter membrane 501 toward the residue pool 104. At the same time, the closing mechanism 7 operates in linkage, and the electric push rod 701 pulls the second linkage rod 703, so that the sliding sleeve 704 moves along the second slide rail 702, driving the baffle 706 to disengage from the rectangular groove 1041, and the residue enters the residue pool 104 through the rectangular groove 1041; S5, filter residue processing stage: After cleaning is completed, the cleaning mechanism 6 stops working, and the closing mechanism 7 is reset. The baffle 706 recloses the rectangular groove 1041, and the sewage discharge mechanism 8 at the bottom of the filter residue pool 104 is started to discharge the collected filter residue through the second servo motor 801 to avoid secondary pollution; S6, circulation monitoring stage: The water sensor 9 in the circulation pool 105 continuously monitors water quality parameters, and the tail water that meets the standards is transported back to the breeding pond through the water pump to achieve water resource recycling.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A tailwater purification device for aquaculture of long-snouted catfish, comprising a main pool (1), characterized in that: The main tank body (1) is provided with a first filter tank (101), an aeration tank (102), a second filter tank (103), a filter residue tank (104) and a circulation tank (105) in sequence. The first filter tank (101) and the aeration tank (102) are separated by a first filter plate (2). The second filter tank (103) and the circulation tank (105) are connected via a single channel (1051). The aeration tank (102) and the second filter tank (103) are separated by an overflow weir (4). An aeration mechanism (3) is provided in the aeration tank (102). An inclined filter is provided in the second filter tank (103). A plurality of second filter plates (5), filter membranes (501) are provided on the second filter plates (5), a cleaning mechanism (6) is provided above the filter residue pool (104), filter residues on the plurality of filter membranes (501) are cleaned by the cleaning mechanism (6), the filter residue pool (104) and the second filter pool (103) are connected via a plurality of rectangular slots (1041) at the ends of the corresponding second filter plates (5), a closing mechanism (7) is provided in the filter residue pool (104), the rectangular slots (1041) are opened and closed by the closing mechanism (7), and the filter residues are cleaned into the filter residue pool (104) in cooperation with the cleaning mechanism (6); The cleaning mechanism (6) comprises a plurality of scrapers (601), two first linkage rods (602), two support plates (603), a reciprocating assembly and a driving assembly. The plurality of scrapers (601) are respectively located on the upper side of the corresponding filter membrane (501). The plurality of scrapers (601) are fixedly connected between the two first linkage rods (602). The support plates (603) are symmetrically fixed at the edge of the main pool body (1). The two support plates (603) are fixedly connected to the first slide rail (604) on the side close to each other. The two first slide rails (604) are both provided with a slide seat (605). The two first linkage rods (602) respectively slide through the support plates (603) and extend upward. The reciprocating assembly is controlled by the driving assembly to drive the first linkage rod (602) to move back and forth synchronously, thereby controlling the scraper (601) to scrape off the filter residue.

2. The tail water purification device for aquaculture of catfish according to claim 1, characterized in that: Two groups of reciprocating components are provided, which are respectively arranged on corresponding support plates (603). Each group of reciprocating components includes a synchronous wheel (606) and a synchronous belt (607). Two synchronous wheels (606) are provided, which are both rotatably connected to the side of the support plate (603). The synchronous wheel (606) close to the filter residue tank (104) is lower in height. The synchronous belt (607) is transmission-connected between the two synchronous wheels (606). The upper end of the first linkage rod (602) is rotatably mounted on the side of the synchronous belt (607).

3. The long snout catfish aquaculture tail water purification device according to claim 2, characterized in that: The driving assembly comprises a first servo motor (608), a first gear (609), a second gear (6010) and a linkage shaft (6011). The first servo motor (608) is fixedly connected to the side of one of the support plates (603), and its output end is fixedly connected to one of the synchronous wheels (606). The linkage shaft (6011) is rotatably connected between the two support plates (603), and its two ends are fixedly connected to the second gear (6010). Two first gears (609) are provided, which are respectively fixedly connected to the other symmetrical synchronous wheels (606), and adjacent first gears (609) are meshed with second gears (6010).

4. The long snout catfish aquaculture tail water purification device according to claim 3, characterized in that: The closing mechanism (7) comprises an electric push rod (701), two second slide rails (702), a second linkage rod (703) and a baffle (706); the electric push rod (701) and the two second slide rails (702) are fixedly connected to the upper side of the filter residue tank (104); the second linkage rod (703) is fixedly connected to the output end of the electric push rod (701); the surfaces of the two second slide rails (702) are slidably connected to the sliding sleeves (704); the second linkage rod (703) is fixedly connected between the two sliding sleeves (704); a plurality of baffles (706) are provided, which are respectively engaged in corresponding rectangular grooves (1041); the bottoms of the two sliding sleeves (704) are fixedly connected to the third linkage rod (705); and the plurality of baffles (706) are fixedly connected to the third linkage rod (705) via a reinforcement member (707).

5. The long snout catfish aquaculture tail water purification device according to claim 1, characterized in that: The aeration mechanism (3) comprises a blower (301), a first air pipe (302) and a second air pipe (303); the blower (301) is arranged outside the main tank body (1); the second air pipe (303) is installed at the bottom of the aeration tank (102); the first air pipe (302) is connected between the blower (301) and the second air pipe (303); and a plurality of aeration heads (304) are installed on the upper side of the second air pipe (303).

6. The tail water purification device for aquaculture of catfish according to claim 5, characterized in that: The first filter plate (2) has a pore diameter of 1-2 mm and is used for preliminary filtering of larger particle impurities in the tail water. The filter membrane (501) adopts a composite ultrafiltration membrane with a pore diameter of 0.01-0.1 μm, which can effectively filter fine particles, colloids and some microorganisms in the tail water.

7. The tail water purification device for aquaculture of catfish according to claim 6, characterized in that: A sewage discharge mechanism (8) is provided at the bottom of each of the first filter tank (101) and the filter residue tank (104). Each set of the sewage discharge mechanism (8) comprises a bottom trough, a second servo motor (801) and a screw conveyor (802). The bottom trough is provided at the bottom of the first filter tank (101) and the filter residue tank (104). The screw conveyor (802) is rotatably connected to the bottom trough. The second servo motor (801) is fixedly installed outside the bottom trough, and its output end is fixedly connected to the screw conveyor (802) for driving the screw conveyor (802) to rotate and discharge the filter residue.

8. The tail water purification device for aquaculture of catfish according to claim 7, characterized in that: Several water sensors (9) are installed in the main pool body (1) to monitor the water quality parameters of each pool body, and several guide plates (401) are installed on the upper side of the overflow weir (4).

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