Automatic cleaning and filtering device for breeding tail water

Abstract

The utility model discloses an automatic cleaning and filtering device for breeding tail water, which is characterized in that a water inlet weir is arranged on one side of a box body, a water outlet structure is arranged on one side opposite to the water inlet weir, a first gate and a second gate are arranged in the box body, and at least three filtering cavities are separated between the first gate and the second gate by partition plates; filter screens are arranged on the middle lower portions of the partition plates between the adjacent filter cavities, brush assemblies capable of automatically moving up and down along the filter screens to brush the filter screens are arranged on the two sides of each filter screen, a drain outlet is formed in the bottom face of each filter cavity, and each drain outlet is provided with a plug assembly capable of being automatically opened. And the drain outlet is connected with a drain pipe. The device is simple in structure and easy to use and maintain, automatic cleaning and automatic filtering operation of the filtering device can be realized, and the management and protection cost is greatly reduced. The filtering effect and reliability of the floating objects in the breeding tail water are remarkably improved, and standardized construction and standardized management of a breeding tail water treatment project are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of breeding tail water treatment, and specifically to an automatic cleaning and filtering device for breeding tail water. BACKGROUND

[0002] Whether it is factory fish farming or pond breeding, there are a large number of suspended fish manure and feed in the breeding tail water, which pollutes the environment and consumes a large amount of water. Recycling of treated water is a problem that needs to be solved urgently. The current general technology for treating aquaculture tail water in China is the "three-pool two-dam" process. Suspended solids in the breeding tail water are intercepted and filtered through the filter dam between the sedimentation tank, aeration tank and ecological purification tank. The filter dam is a filter structure built on the isolation dam with perforated bricks, and filter material is arranged in the filter structure. The filter material commonly used in the filter dam is porous material such as volcanic rock and ceramic particles. The main problems are that the filtering precision is not enough, it is easy to block, and it is difficult to clean.

[0003] Cleaning the filter material is labor-intensive and cannot be mechanized and automated, which causes difficulties in treating tail water in the aquaculture industry. There is an urgent need for a filter device with high filtering precision, automatic cleaning operation, reliable performance, and easy use and maintenance. SUMMARY

[0004] The utility model aims at providing an automatic cleaning and filtering device for breeding tail water, which can automatically clean and discharge pollutants after filtering the breeding tail water.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an automatic cleaning and filtering device for breeding tail water, comprising a box body, characterized in that: a water inlet weir is arranged on one side of the box body, and a water outlet structure is arranged on the side opposite to the water inlet weir; a first gate and a second gate are arranged respectively near the water inlet side and the water outlet side in the box body; at least three filter cavities are arranged in the box body through a partition plate between the first gate and the second gate; a filter screen is arranged in the middle and lower part of the partition plate between adjacent filter cavities; tail water enters the next filter cavity through the filter screen; a brush assembly for brushing the filter screen is arranged on both sides of each filter screen and can move up and down along the filter screen automatically; a blowdown port is arranged on the bottom surface of each filter cavity; a plug assembly that can be automatically opened is arranged on each blowdown port; and the blowdown port is connected to a blowdown pipe.

[0006] In the above-mentioned scheme: the first gate and the second gate are respectively controlled to open and close by a cylinder installed on the top surface of the box body. The gate can be automatically opened and closed by the cylinder.

[0007] In the above solution: the brush assembly includes a brush mounting bracket, which includes a crossbeam. Vertical mounting frames are respectively provided on both sides of the filter screen under the crossbeam, extending through the top plate of the housing into the housing body. Brushes are mounted on the vertical mounting frames, with each side of the filter screen in contact with a corresponding brush. The brush mounting bracket is controlled by a brush cylinder to move up and down along the filter screen. When contaminants accumulate on the filter screen, affecting filtration and causing the water level in the downstream filtration chamber to drop, the brush cylinder controls the up and down movement along the filter screen to clean the debris.

[0008] In the above solution: the plug assembly includes a plug body that matches the drain outlet, a vertical rod connected to the plug body, and the vertical rod passes through the top surface of the housing and is connected to the plug control cylinder. This enables the plug to open and close automatically.

[0009] In the above scheme: all vertical rods are connected to a horizontal frame, which is connected to the plug control cylinder.

[0010] In the above scheme: a spring cover is set on the top surface of the box corresponding to the vertical rod, the top end of the vertical rod passes through the spring cover, a spring is sleeved on the vertical rod located inside the spring cover, the top end of the spring contacts the top surface of the spring cover, and a baffle with a diameter larger than the vertical rod is set on the vertical rod corresponding to the lower end of the spring.

[0011] In the above scheme: the housing is divided into four filter chambers by partitions, and level transmitters are installed in the first and third filter chambers. The level transmitters provide information on the liquid levels in the front and rear filter chambers, thereby enabling automatic control of cleaning or filtration.

[0012] Beneficial effects: This device has a simple structure and is easy to use and maintain. It allows for PLC program control of the equipment's operating status, enabling automatic cleaning and filtration, significantly reducing maintenance costs. It also significantly improves the filtration efficiency and reliability of floating debris in aquaculture wastewater. Furthermore, it can be factory-produced, achieving equipment standardization and facilitating the standardized construction and management of aquaculture wastewater treatment projects. Attached Figure Description

[0013] Figure 1 This is a top view of the present invention.

[0014] Figure 2 for Figure 1 AA sectional view.

[0015] Figure 3 for Figure 1 BB cross-sectional view.

[0016] Figure 4 for Figure 2 CC section view.

[0017] Figure 5 is a D-D cross-sectional view of the device. Figure 2

[0018] Figure 6 is an A-view of the device. Figure 2

[0019] Figure 7 is an installation diagram of the device.

[0020] Figure 8 is an E-E cross-sectional view of the device. Figure 7

[0021] Figure 9 is a schematic diagram of the installation of the drain pipe. DETAILED DESCRIPTION

[0022] The present application will be further described below in conjunction with the accompanying drawings and examples.

[0023] As shown in the drawings, the automatic cleaning and filtering device for aquaculture tail water comprises a box body 1, a water inlet weir 101 is arranged on one side of the box body 1, and a water outlet structure 102 is arranged on the side opposite to the water inlet weir 101. The water outlet structure 102 can also be a water outlet weir. Figures 1-6 A first gate 2 and a second gate 3 are arranged in the box body 1 near the water inlet side and the water outlet side respectively, and at least three filtering cavities are separated by a partition plate 103 in the box body 1 between the first gate 2 and the second gate 3. There are four filtering cavities in the drawings. A liquid level transmitter 9 is installed in the first and third filtering cavities. The first gate 2 and the second gate 3 are respectively controlled to open and close by a cylinder 6 installed on the top surface of the pool body. As shown in the drawings, the cylinder 6 is installed on the top surface of the box body through a cylinder installation support. The top surface of the box body is provided with perforations for the first gate and the second gate to pass through.

[0024] The middle and lower parts of the partition plate 103 between adjacent filtering cavities are provided with filter screens 4, and the tail water enters the next filtering cavity through the filter screens 4. A brush assembly for brushing the filter screen, which can automatically move up and down along the filter screen 4, is arranged on both sides of each filter screen 4. A drain port is arranged on the bottom surface of each filtering cavity, and a plug assembly capable of being automatically opened is arranged on each drain port. The drain port is connected to a drain pipe 5.

[0025]

[0026] ​​​​The brush assembly includes a brush mounting bracket 7, which includes a crossbeam 701. Vertical mounting frames 702 are respectively provided on both sides of the filter screen on the lower side of the crossbeam 701. The lower ends of the vertical mounting frames 702 extend through the top plate of the tank body 1. Brushes 703 are installed on the lower ends of the vertical mounting frames corresponding to the filter screens. Each filter screen has brushes 703 in contact with its corresponding side. Specifically, the vertical mounting frame 702 located between two filter screens has brushes on both sides corresponding to the filter screens on either side. That is, brushes are provided on both sides of the middle vertical mounting frame 702. The brush mounting bracket is controlled by a brush cylinder 704 to move up and down along the filter screen. When the brush assembly is not working, it is located above the filter screen (upper position). Specifically, the brush cylinder 704 is connected to the crossbeam 701 and controls all brushes to move up and down simultaneously. The brush cylinder 704 is mounted on the top surface of the housing via a cylinder bracket.

[0027] The plug assembly includes a plug body 8 that matches the drain port. A vertical rod 801 is connected to the plug body 8, and the vertical rod 801 passes through the top surface of the housing and is connected to the plug control cylinder 802. The drain port is normally closed. When drainage is required, the plug assembly moves the plug body 8 upward, and the drain port opens.

[0028] Preferably, the top ends of all vertical rods 801 are connected to a horizontal frame 806, which is connected to a plug control cylinder 802. A spring cover 803 is installed on the top surface of the housing corresponding to the vertical rods. The top ends of all vertical rods pass through the spring covers, and a spring 804 is fitted inside the spring cover. The top end of the spring 804 contacts the top surface of the spring cover 803. A baffle 805 with a diameter larger than the vertical rod is installed on the vertical rod corresponding to the lower end of the spring. When the plug moves upward, the baffle 805 compresses the spring. After drainage, the spring assists the plug in returning to its original position, while also helping to ensure that the plug keeps the drainage port normally closed.

[0029] When designed for factory farming, a sedimentation tank is installed at the front of the tank. The sedimentation tank is connected to this filtration device through an inlet weir 101. Water from the sedimentation tank enters the tank, is filtered, exits from the tank, and then enters the subsequent aeration tank, etc.

[0030] When used in large-pond aquaculture, modifications are made to the existing three-pond, two-dam process, such as... Figures 7-9 Our filtration devices can be installed on the dam 10 between the sedimentation tank, aeration tank, and ecological purification tank. The sewage pipe 5 is located inside the dam 10 and exits from within it. When the sedimentation tank, aeration tank, or ecological purification tank is large or the water volume to be treated is large, multiple filtration devices can be installed on the dam. The water from the filtration device's outlet structure enters the subsequent aeration tank or ecological purification tank, replacing the original filtration structure on the dam.

[0031] In actual work, the liquid level transmitter detects the liquid level of the first filter cavity and the third filter cavity in real time, and after comparison, when the liquid level difference of the liquid level transmitter is less than the set value, the first gate and the second gate are opened, the plug assembly is closed, and the brush assembly returns to the upper position. The filter device enters the normal filtering state, and the breeding tail water enters the water inlet weir from the sedimentation tank, and then flows into the air tank after being filtered by the three-layer filter screen. The suspended solids in the tail water are intercepted and adhered to the filter screen. With the progress of filtration, the suspended solids adhered to the filter screen gradually increase, the filtration efficiency gradually decreases, and the tail water passing capacity gradually decreases, so the liquid level difference between the front and rear of the filter screen gradually increases. When the liquid level difference between the front and rear of the two liquid level transmitters is greater than or equal to the set value, the filter device enters the cleaning state, the first gate is opened, the second gate is closed, the plug assembly is closed, and the brush assembly reciprocates up and down. The suspended solids adhered to the filter screen are brushed off, the water passing capacity of the filter screen gradually recovers, the liquid levels before and after the filter screen gradually reach a consistent value, and both are at a high liquid level. When the liquid level difference between the front and rear of the two liquid level transmitters is approximately 0, and both are at a high liquid level, the blowdown program is started. At this time, the working state of each device terminal is: the first gate and the second gate are closed, the plug assembly is opened, and the brush assembly stops reciprocating up and down and stops at the upper position. With the progress of the blowdown process, the liquid levels of the first filter cavity and the second filter cavity decrease simultaneously, the liquid level difference between the front and rear of the two liquid level transmitters is approximately 0, and both are at a low liquid level. When the filtration program is started, each device terminal is in the reset state: the first gate and the second gate are opened, the plug assembly is closed, and the brush assembly returns to the upper position to continue the filtering work. The above control process can be automatically controlled by a PLC controller.

[0032] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An automatic cleaning and filtration device for aquaculture wastewater, comprising a housing, characterized in that: A water inlet weir is provided on one side of the tank, and a water outlet structure is provided on the opposite side. A first gate and a second gate are respectively provided in the tank near the water inlet and the water outlet. At least three filter chambers are separated in the tank between the first gate and the second gate by a partition. A filter screen is provided in the lower middle part of the partition between adjacent filter chambers. The tailwater enters the next filter chamber through the filter screen. Each filter screen is provided with a brush assembly on both sides that can automatically move up and down along the filter screen to clean it. A drain port is provided on the bottom surface of each filter chamber. Each drain port is equipped with a plug assembly that can automatically open. The drain port is connected to a drain pipe.

2. The automatic cleaning and filtration device for aquaculture wastewater according to claim 1, characterized in that: The first gate and the second gate are respectively controlled to open and close by cylinders installed on the top surface of the housing.

3. The automatic cleaning and filtration device for aquaculture wastewater according to claim 1 or 2, characterized in that: The brush assembly includes a brush mounting bracket, which includes a crossbeam. Vertical mounting frames are respectively provided on both sides of the filter screen on the lower side of the crossbeam. The vertical mounting frames extend through the top plate of the housing and into the housing. Brushes are respectively installed on the vertical mounting frames. Each filter screen has a corresponding brush in contact with both sides. The brush mounting bracket moves up and down along the filter screen under the control of a brush cylinder.

4. The automatic cleaning and filtration device for aquaculture wastewater according to claim 3, characterized in that: The plug assembly includes a plug body that matches the drain outlet, a vertical rod connected to the plug body, and the vertical rod passes through the top surface of the housing and is connected to the plug control cylinder.

5. The automatic cleaning and filtration device for aquaculture wastewater according to claim 4, characterized in that: All vertical rods are connected to a horizontal frame, which is connected to a plug control cylinder.

6. The automatic cleaning and filtration device for aquaculture wastewater according to claim 5, characterized in that: A spring cover is provided on the top surface of the box corresponding to the vertical rod. The top end of the vertical rod passes through the spring cover, and a spring is placed inside the spring cover. The top end of the spring contacts the top surface of the spring cover. A baffle with a diameter larger than the vertical rod is provided on the vertical rod at the position corresponding to the lower end of the spring.

7. The automatic cleaning and filtration device for aquaculture wastewater according to claim 1, characterized in that: The box is divided into four filter chambers by partitions, and level transmitters are installed in the first and third filter chambers.

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