Variable phosphorus removal interception dam

Abstract

The present invention discloses a variable phosphorus removal interception dam, which belongs to the field of water treatment and comprises a box body, wherein two side walls are arranged on the top of the box body, and a water flow channel is formed between the two side walls; a plurality of filter dams are arranged in the water flow channel, and the plurality of filter dams are arranged in sequence and spaced along the water flow direction; a filter dam receiving tank corresponding to the filter dam is formed on the top of the box body between the two side walls; each filter dam is equipped with a lifting mechanism, and the lifting mechanism is used to drive the filter dam to rise and fall; in the present invention, the height of the filter dam can be adjusted according to the water level height of the water flow; the particle size gradient design of the phosphorus removal filler in the phosphorus removal reactor of the plurality of filter dams can increase the water flow velocity and the uniformity of the water flow distribution, thereby helping to improve the phosphorus removal rate; in the non-drainage period of aquaculture tail water, in order to protect the phosphorus removal filler in the phosphorus removal reactor of the filter dam, the lifting mechanism drives the filter dam to descend, so that the filter dam is completely located in the filter dam receiving tank, thereby preventing the phosphorus removal filler in the phosphorus removal reactor of the filter dam from being exposed to the sun.

Description

Technical Field

[0001] The present invention relates to the field of aquaculture tail water treatment, in particular to a variable phosphorus removal interception dam. Background Art

[0002] In the field of aquaculture effluent treatment, filter dams are a common water treatment facility. Traditional filter dams mostly adopt a fixed dam structure, filled with porous filtering and adsorption fillers such as gravel and volcanic rock, and use the fillers to filter and adsorb to reduce the concentration of suspended matter in the water, such as the filter dam in the "three pools and two dams" process.

[0003] Traditional filter dams have the following problems:

[0004] (1) The particle size of the filter dam filler is single, which easily leads to clogging of the filler on the water-facing side. The filler on the back water side is not effectively utilized and a gradient cannot be formed. The water flow cannot gradually contact and react with fillers of different particle sizes during the filtration process.

[0005] (2) The dam body has a fixed height and poor adaptability. Due to the fixed height of the dam body, when encountering aquaculture tailwater with different water levels, the filter dam height cannot be flexibly adjusted to adapt.

[0006] (3) Filling and maintenance of fillers are inconvenient; the existing filter dam’s filter material filling method is not convenient enough, and the entire filter dam needs to be disassembled to replace or add fillers, which increases maintenance workload and time costs.

[0007] (4) Lack of filter dam protection and cleaning measures; during the non-drainage period or dry season of aquaculture tail water, the filter dam is exposed to the outside for a long time, and the filler is easily affected by the natural environment and ages and fails; at the same time, a large amount of impurities will adhere to the surface of the filter dam after working for a period of time, resulting in reduced filtration performance. However, the existing technology lacks effective automated cleaning devices and methods, and most of the cleaning relies on manual cleaning, which is inefficient and untimely.

[0008] (5) Impact on flood discharge: Traditional fixed dams will have a certain blocking effect on water flow during flood discharge, reducing the water flow rate. During flood discharge, water needs to pass quickly, but the presence of filter dams will hinder the flow of flood water, resulting in an impact on the flood discharge rate, making it impossible to discharge excess water in time, and increasing the risk of flooding. Summary of the Invention

[0009] In order to solve the technical problems existing in the prior art, the present invention provides a variable phosphorus removal interception dam.

[0010] The technical solutions of the present invention are as follows:

[0011] Variable phosphorus removal interception dam, including:

[0012] A box body, wherein two side walls are provided on the top of the box body, and a water flow channel is formed between the two side walls;

[0013] There are multiple filter dams, which are arranged in the water flow channel and spaced apart in sequence along the water flow direction; a filter dam receiving groove corresponding to the filter dam is formed on the top of the box body between the two side walls;

[0014] A lifting mechanism is provided for each filter dam, and the lifting mechanism is used to drive the filter dam to rise and fall.

[0015] As a preferred embodiment of the present invention, the filter dam includes a frame and several dephosphorization reactors, and the several dephosphorization reactors are stacked in the frame; the dephosphorization reactors of the filter dam are modularly loaded, which is convenient and quick to install and is conducive to later replacement and maintenance.

[0016] As a preferred embodiment of the present invention, the multiple filter dams include a coarse filter layer dam, a filter layer dam and a fine filter layer dam arranged in sequence along the water flow direction. The phosphorus removal reactor of the coarse filter layer dam uses an irregularly shaped phosphorus removal filler with a particle size of 5-8 cm, the phosphorus removal reactor of the filter layer dam uses a spherical phosphorus removal filler with a particle size of 3-5 cm, and the phosphorus removal reactor of the fine filter layer dam uses a spherical phosphorus removal filler with a particle size of 1-3 cm; the particle size of the phosphorus removal filler in the phosphorus removal reactors of the multiple filter dams decreases gradually in the water flow direction. This gradient design can increase the water flow velocity and the uniformity of the water flow distribution, thereby helping to improve the phosphorus removal rate.

[0017] As a preferred embodiment of the present invention, fulcrum structures are respectively provided at both ends of the top of the frame, and a slide groove for accommodating the fulcrum structure is formed on the side wall, and the slide groove extends along the vertical direction of the side wall. A cavity is provided inside the box body, and the lifting mechanism is arranged in the cavity. The execution end of the lifting mechanism passes through the box body vertically upward and is located in the slide groove and connected to the fulcrum structure; the width consistency between the inlet and outlet of the water flow channel is ensured, the lifting mechanism drives the frame to rise and fall, and the dephosphorization reactors stacked in the frame rise and fall together with the frame.

[0018] As a preferred embodiment of the present invention, the width of the chute is smaller than the width of the filter dam, and the end of the filter dam is in contact with the side wall, so as to prevent a large amount of water from flowing through the chute and bypassing the filter dam.

[0019] As a preferred embodiment of the present invention, the lifting mechanism includes two hydraulic push rods or electric push rods that act synchronously, and a mechanical seal is provided at the place where the push rod body of the hydraulic push rod or electric push rod passes through the box body. The mechanical seal can prevent water from entering the internal cavity of the box body.

[0020] As a preferred embodiment of the present invention, a rubber seal is provided at the top opening of the filter dam containing tank; the rubber seal has a certain elasticity. When the filter dam is completely located in the filter dam containing tank, the rubber seal is in elastic contact with the top side of the filter dam. Under the action of the rubber seal, the interior of the filter dam containing tank is in a relatively closed state, preventing debris from entering the filter dam containing tank.

[0021] As a preferred embodiment of the present invention, a mud collecting trough is formed on the top of the box between two adjacent filter dams, and a 20° slope is provided on both sides of the mud collecting trough. The surface lining of the mud collecting trough is an ultra-high molecular weight polyethylene plate with a friction coefficient of less than 0.1; the sludge intercepted by the filter dam or the attachments washed off will be deposited in the mud collecting trough at the bottom of the filter dam, thereby avoiding the accumulation of sludge at the bottom of the filter dam and affecting the phosphorus removal effect of the filter dam; when the sludge accumulates excessively, it will also affect the function of the filter dam. Therefore, it is necessary to use a lifting mechanism to drive the filter dam to descend during the non-drainage stage of the aquaculture tail water (pollution source) so that the filter dam is completely located in the filter dam holding tank, and then use the discharged receiving water (purified water that has been strictly treated and meets the standards, river water, natural rainwater, etc.) to flush the mud collecting trough to flush away the sludge in the mud collecting trough, so as to achieve regular cleaning of the mud collecting trough.

[0022] After the filter dam has been working for a period of time for dephosphorization, some attachments will adhere to the surface of the filter dam, affecting the dephosphorization efficiency of the filter dam. Therefore, the filter dam needs to be cleaned regularly. Therefore, the present invention also includes a cleaning mechanism for cleaning the filter dam, the cleaning mechanism including a transmission box, a transmission shaft rotatably arranged inside the transmission box, and a motor for driving the transmission shaft to rotate arranged on the top of the transmission box; the two ends of the transmission shaft pass through the two ends of the transmission box respectively and are located outside the transmission box, and the two ends of the transmission shaft located outside the transmission box are respectively installed with travel gears, two racks are arranged between the two side walls, and the travel gears at both ends of the transmission shaft are respectively engaged with the two racks; at least two slide rails are arranged between the two side walls, and the bottom of the transmission box is slidably connected to the slide rails; the bottom of the transmission box is rotatably connected to a roller brush for brushing the side of the filter dam, and the top of the roller brush is located inside the transmission box and is connected to the transmission shaft through a bevel gear set.

[0023] In order to realize the automatic operation of the cleaning mechanism, the present invention provides liquid level sensors on both sides of each filter dam, and a liquid level sensor is shared between two adjacent filter dams; the liquid level sensors are communicatively connected to an external control system, and when the liquid level difference between the two adjacent liquid level sensors on both sides of the filter dam is greater than a preset value, the external control system controls the cleaning mechanism to start working and clean the filter dam.

[0024] The present invention is beneficial in that:

[0025] (1) The height of the filter dam can be adjusted according to the water level, and when discharging flood water, it will not hinder the flow of flood water and avoid affecting the discharge speed;

[0026] (2) The particle size of the phosphorus removal filler in the phosphorus removal reactor of multiple filter dams decreases gradually along the direction of water flow, which avoids the problem of filler clogging on the water-facing side of the filter dam and ineffective utilization of filler on the back-water side. During the filtration process, the water flow can gradually fully contact and react with fillers of different particle sizes. This filler particle size gradient design can increase the water flow velocity and the uniformity of water flow distribution, thereby helping to improve the phosphorus removal rate;

[0027] (3) During the non-drainage period of aquaculture tail water (pollution source), in order to protect the dephosphorization filler in the dephosphorization reactor of the filter dam, the lifting mechanism drives the filter dam down so that the filter dam is completely located in the filter dam holding tank, thereby preventing the dephosphorization filler in the dephosphorization reactor of the filter dam from being affected by the natural environment such as exposure to the sun and aging and failure;

[0028] (4) A cleaning mechanism is provided to automatically clean the filter dam in a timely manner, restore the flux of the filter dam, and ensure the phosphorus removal efficiency of the filter dam. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the filter dam after it is raised;

[0030] Figure 2 1 is a schematic cross-sectional view of the filter dam of the present invention;

[0031] Figure 3 1 is a longitudinal cross-sectional schematic diagram of the filter dam of the present invention;

[0032] Figure 4 This is a schematic diagram of the filter dam after it is lowered;

[0033] Figure 5 This is a schematic diagram of the present invention after the cleaning mechanism is installed;

[0034] Figure 6 This is a schematic diagram of the interior of the transmission box of the cleaning mechanism of the present invention;

[0035] Figure 7 yes Figure 6 A is an enlarged schematic diagram.

[0036] The meaning of the reference numerals in the figures:

[0037] 1- box, 2- filter dam, 3- slide, 4- hydraulic push rod, 5- mechanical seal;

[0038] 6- rubber seal, 7- mud collecting trough, 8- bevel gear set, 9- plane bearing, 10- side wall;

[0039] 11-driving gear, 12-driven gear, 13-transmission gear, 14-connecting piece, 15-bearing;

[0040] 16-travel gear, 17-rack, 18-slide rail, 19-universal ball;

[0041] 20- filter dam holding tank, 201- frame, 202- phosphorus removal reactor, 203- fulcrum structure;

[0042] 21-coarse filter layer dam, 22-filter layer dam, 23-fine filter layer dam;

[0043] 31-transmission box, 32-transmission shaft, 33-motor, 34-roller brush;

[0044] 40-Liquid level sensor;

[0045] 401-first liquid level sensor, 402-second liquid level sensor;

[0046] 403 - the third liquid level sensor, 404 - the fourth liquid level sensor. DETAILED DESCRIPTION

[0047] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] like Figure 1-4 As shown, this embodiment is a variable phosphorus removal filter dam, including a box body 1, two side walls 10 are arranged on the top of the box body 1, and a water flow channel is formed between the two side walls 10; three filter dams 2 are arranged in the water flow channel, and the three filter dams 2 are arranged in sequence along the water flow direction. Of course, in actual application, the number of filter dams 2 can be increased or decreased according to actual needs; a filter dam receiving groove 20 corresponding to the filter dam 2 is formed on the top of the box body 1 between the two side walls 10, that is, three filter dam receiving grooves 20 corresponding to the three filter dams 2 are formed on the top of the box body 1 between the two side walls 10; at the same time, each filter dam 2 is equipped with a lifting mechanism, which is used to drive the filter dam 2 to rise and fall, so that the height of the filter dam 2 can be adjusted according to the water level of the water flow.

[0049] In this embodiment, the filter dam 2 includes a frame 201 and four phosphorus removal reactors 202, and the four phosphorus removal reactors 202 are stacked in the frame 201; the phosphorus removal reactors 202 of the filter dam 2 are modularly loaded, and the installation is convenient and quick, which is conducive to later replacement and maintenance; the number of phosphorus removal reactors 202 in the filter dam 2 can be appropriately increased or decreased according to actual conditions.

[0050] In this embodiment, the three filter dams 2 include a coarse filter layer dam 21, a filter layer dam 22 and a fine filter layer dam 23, which are arranged in sequence along the water flow direction. The phosphorus removal reactor 202 of the coarse filter layer dam 21 uses irregular-shaped phosphorus removal fillers with a particle size of 6 cm, the phosphorus removal reactor 202 of the filter layer dam 22 uses spherical phosphorus removal fillers with a particle size of 3 cm, and the phosphorus removal reactor 202 of the fine filter layer dam 23 uses spherical phosphorus removal fillers with a particle size of 2 cm; the particle size of the phosphorus removal fillers in the phosphorus removal reactors 202 of the multiple filter dams 2 decreases gradually in the direction of water flow, avoiding the problem of clogging of the fillers on the water-facing side of the filter dam 2 and ineffective utilization of the fillers on the back water side. During the filtration process, the water flow can gradually contact and react with fillers of different particle sizes. This filler particle size gradient design can increase the water flow velocity and the uniformity of water flow distribution, thereby helping to improve the phosphorus removal rate.

[0051] During operation, the height of the filter dam 2 is adjusted according to the water level of the water flow, so that the filter dam 2 is appropriately higher than the water level of the water flow. The water flows through the coarse filter layer filter dam 21, the filter layer filter dam 22 and the fine filter layer filter dam 23 in sequence. The phosphorus removal fillers in the phosphorus removal reactor 202 of each filter dam 2 come into contact with the water flow and react to remove phosphorus in the water flow; during the non-drainage period of aquaculture tail water (pollution source), in order to protect the phosphorus removal fillers in the phosphorus removal reactor 202 of the filter dam 2, the lifting mechanism drives the filter dam 2 to descend, so that the filter dam 2 is completely located in the filter dam holding tank 20, to prevent the phosphorus removal fillers in the phosphorus removal reactor 202 of the filter dam 2 from being affected by the natural environment such as exposure to the sun and aging and failure; and when discharging flood water, it will not hinder the flow of flood water, so as to avoid affecting the flood discharge speed.

[0052] In another embodiment, the phosphorus removal reactor 202 of the coarse filter layer dam 21 uses an irregularly shaped phosphorus removal filler with a particle size of 7 cm, the phosphorus removal reactor 202 of the filter layer dam 22 uses a spherical phosphorus removal filler with a particle size of 4 cm, and the phosphorus removal reactor 202 of the fine filter layer dam 23 uses a spherical phosphorus removal filler with a particle size of 3 cm.

[0053] In another embodiment, the phosphorus removal reactor 202 of the coarse filter layer dam 21 uses an irregularly shaped phosphorus removal filler with a particle size of 8 cm, the phosphorus removal reactor 202 of the filter layer dam 22 uses a spherical phosphorus removal filler with a particle size of 5 cm, and the phosphorus removal reactor 202 of the fine filter layer dam 23 uses a spherical phosphorus removal filler with a particle size of 3 cm.

[0054] In another embodiment, the phosphorus removal reactor 202 of the coarse filter layer dam 21 uses an irregularly shaped phosphorus removal filler with a particle size of 5 cm, the phosphorus removal reactor 202 of the filter layer dam 22 uses a spherical phosphorus removal filler with a particle size of 3 cm, and the phosphorus removal reactor 202 of the fine filter layer dam 23 uses a spherical phosphorus removal filler with a particle size of 1 cm.

[0055] like Figure 1 and 2As shown, in this embodiment, support structures 203 are respectively provided at both ends of the top of the frame 201, and a chute 3 for accommodating the support structure 203 is formed on the side wall 10. The chute 3 extends in the vertical direction of the side wall 10, and the width of the chute 3 is smaller than the width of the filter dam 2. The end of the filter dam 2 is in contact with the side wall 10. When the filter dam 2 is raised or lowered, the end of the filter dam 2 is in sliding contact with the side wall 10, thereby preventing a large amount of water from flowing around the filter dam 2 through the chute 3; the box body 1 has a cavity inside, and the lifting mechanism is arranged in the cavity, and the execution end of the lifting mechanism passes through the box body 1 vertically upward and is located in the chute 3 and connected to the support structure 203; the width consistency between the inlet and outlet of the water flow channel is ensured, the lifting mechanism drives the frame 201 to rise and fall, and the dephosphorization reactor 202 stacked in the frame 201 rises and falls with the frame 201.

[0056] like Figure 2 As shown, in this embodiment, the lifting mechanism includes two hydraulic push rods 4 that act synchronously, and the push rod body of the hydraulic push rod 4 is provided with a mechanical seal 5 at the place where it passes through the box body 1. The provision of the mechanical seal 5 can prevent water from flowing into the internal cavity of the box body 1; in actual application, the lifting mechanism can also adopt two electric push rods that act synchronously, and the push rod body of the electric push rod is provided with a mechanical seal 5 at the place where it passes through the box body 1.

[0057] like Figure 3 As shown, in this embodiment, a rubber seal 6 is provided at the top opening of the filter dam containing tank 20; the rubber seal 6 has a certain elasticity. When the filter dam 2 is completely located in the filter dam containing tank 20, the rubber seal 6 elastically contacts the top side of the filter dam 2. Under the action of the rubber seal 6, the interior of the filter dam containing tank 20 is in a relatively closed state, preventing debris from entering the filter dam containing tank 20.

[0058] like Figure 4 As shown, in this embodiment, a sludge collecting trough 7 is formed on the top of the box body 1 between two adjacent filter dams 2. A 20° slope is provided on both sides of the sludge collecting trough 7. The surface lining of the sludge collecting trough 7 is an ultra-high molecular weight polyethylene plate with a friction coefficient of less than 0.1. The sludge intercepted by the filter dam 2 or the attachments cleaned off will be deposited in the sludge collecting trough 7 at the bottom of the filter dam 2, thereby preventing the sludge from accumulating at the bottom of the filter dam 2 and affecting the phosphorus removal effect of the filter dam 2. When the sludge accumulates excessively, it will also affect the function of the filter dam 2. Therefore, it is necessary to use a lifting mechanism to drive the filter dam 2 to descend during the non-drainage stage of the aquaculture tail water (pollution source) so that the filter dam 2 is completely located in the filter dam holding tank 20. Then, the discharged receiving water (purified water, river water, natural rainwater, etc. that has been strictly treated to meet the standards) is used to flush the sludge collecting trough 7 to flush away the sludge in the sludge collecting trough 7, thereby achieving regular cleaning of the sludge collecting trough 7.

[0059] After the filter dam 2 has been working for a period of time, some debris will adhere to the surface of the filter dam 2, affecting the efficiency of the filter dam 2 in removing phosphorus. Therefore, the filter dam 2 needs to be cleaned regularly. Therefore, this embodiment also includes a cleaning mechanism for cleaning the filter dam 2, such as Figure 5 and 6 As shown, the cleaning mechanism includes a transmission box 31, a transmission shaft 32 is rotatably arranged inside the transmission box 31, a motor 33 for driving the transmission shaft 32 to rotate is arranged on the top of the transmission box 31, and a protective cover is provided on the periphery of the motor 33; Figure 6 As shown, a driving gear 11 is installed on the output shaft of the motor 33, and a driven gear 12 is installed on the transmission shaft 32. A transmission gear 13 is provided between the driving gear 11 and the driven gear 12, and the transmission gear 13 is meshed with the driving gear 11 and the driven gear 12 at the same time. The transmission gear 13 is connected to the transmission box 31 through a connecting piece 14; both ends of the transmission shaft 32 pass through the two ends of the transmission box 31 and are located outside the transmission box 31. The transmission shaft 32 and the end of the transmission box 31 are rotatably connected by bearings 15. Traveling gears 16 are respectively installed at both ends of the transmission shaft 32 located outside the transmission box 31, and two racks 17 are provided between the two side walls 10. The traveling gears 16 at both ends of the transmission shaft 32 are meshed with the two racks 17 respectively; two slide rails 18 are provided between the two side walls 10. Of course, the number of slide rails 18 can be appropriately increased according to actual conditions; the bottom of the transmission box 31 is slidably connected to the slide rails 18, as shown Figure 6 and 7 As shown, an inverted T-shaped groove is formed on the slide rail 18, and a universal ball 19 slides in the inverted T-shaped groove. The universal ball 19 is connected to the bottom of the transmission box 31, and the universal ball 19 provides a sliding support for the transmission box 31. At the same time, the universal ball 19 cooperates with the inverted T-shaped groove on the slide rail 18 to provide a movement limit for the transmission box 31; the bottom of the transmission box 31 is rotatably connected to a roller brush 34 for brushing the side of the filter dam 2, and the top of the roller brush 34 is located inside the transmission box 31 and is connected to the transmission shaft 32 through the bevel gear set 8; Figure 6 As shown, the top of the roller brush 34 passes through the bottom of the transmission box 31 and is rotatably connected to the transmission box 31 through a plane bearing 9. One of the bevel gears of the bevel gear set 8 is installed on the top of the roller brush 34, and the other bevel gear of the bevel gear set 8 is installed on the transmission shaft 32. The two bevel gears are engaged. When the transmission shaft 32 rotates, the transmission shaft 32 drives the roller brush 34 to rotate through the bevel gear set 8, thereby realizing that the roller brush 34 brushes the filter dam 2.

[0060] like Figure 6 As shown, in this embodiment, there are six roller brushes 34 in total, with two roller brushes 34 forming a group. Each group of roller brushes 34 corresponds to one filter dam 2 , and the two roller brushes 34 in each group of roller brushes 34 brush both sides of the filter dam 2 respectively.

[0061] In order to realize the automatic operation of the cleaning mechanism, in this embodiment, liquid level sensors 40 are respectively provided on both sides of each filter dam 2, and one liquid level sensor 40 is shared between two adjacent filter dams 2. The liquid level sensor 40 is communicated with the external control system. When the two adjacent liquid level sensors 40 detect that the liquid level difference on both sides of the filter dam 2 is greater than a preset value, the external control system controls the cleaning mechanism to start working and clean the filter dam 2, thereby realizing timely automatic cleaning of the filter dam 2.

[0062] like Figure 4 As shown, in this embodiment, a first liquid level sensor 401, a second liquid level sensor 402, a third liquid level sensor 403 and a fourth liquid level sensor 404 are sequentially arranged according to the direction of water flow; wherein the first liquid level sensor 401 and the second liquid level sensor 402 are used to detect the liquid level difference on both sides of the coarse filter layer filter dam 21, the second liquid level sensor 402 and the third liquid level sensor 403 are used to detect the liquid level difference on both sides of the filter layer filter dam 22, and the third liquid level sensor 403 and the fourth liquid level sensor 404 are used to detect the liquid level on both sides of the fine filter layer filter dam 23. difference; when the liquid level difference ΔH on both sides of one of the filter dams 2 is ≥15cm, the external control system controls the cleaning mechanism to start working, the motor 33 drives the transmission shaft 32 to rotate, and the traveling gears 16 at both ends of the transmission shaft 32 roll along the rack 17 to realize the lateral movement of the cleaning mechanism. At the same time, the transmission shaft 32 drives the roller brush 34 to rotate, and the roller brush 34 brushes the filter dam 2; during each cleaning process, the cleaning mechanism moves back and forth three times horizontally, thereby ensuring the cleaning effect of the filter dam 2, restoring the flux of the filter dam 2, and ensuring the phosphorus removal efficiency of the filter dam 2.

[0063] In the description of the present invention, it should be understood that the terms "transverse", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention; in addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0064] In the description of the present invention, it should be noted that: unless otherwise clearly stipulated and limited, the terms "installation", "connection", "setting" and "formation" should be understood in a broad sense; for example: it can be a fixed connection, setting, or a detachable connection, setting, or an integrated structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two components; for those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0065] In the description of the present invention, reference to terms such as "embodiment", "implementation method" or "practical application" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment are included in at least one embodiment or example of the present invention; the schematic expressions of the above terms do not necessarily refer to the same embodiment or example, and the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the scope of protection of the present invention.

Claims

1. Variable phosphorus removal interception dam, characterized in that: include: A box body, wherein two side walls are provided on the top of the box body, and a water flow channel is formed between the two side walls; A plurality of filter dams are provided, the plurality of filter dams being arranged in the water flow channel and spaced in sequence along the water flow direction; the plurality of filter dams comprising a coarse filter layer dam, a filter layer dam, and a fine filter layer dam spaced in sequence along the water flow direction; the phosphorus removal reactor of the coarse filter layer dam uses an irregularly shaped phosphorus removal filler with a particle size of 5-8 cm, the phosphorus removal reactor of the filter layer dam uses a spherical phosphorus removal filler with a particle size of 3-5 cm, and the phosphorus removal reactor of the fine filter layer dam uses a spherical phosphorus removal filler with a particle size of 1-3 cm; A filter dam receiving tank corresponding to the filter dam is formed on the top of the box body between the two side walls; the filter dam includes a frame and a plurality of phosphorus removal reactors, and the plurality of phosphorus removal reactors are stacked in the frame; a sludge collecting tank is formed on the top of the box body between two adjacent filter dams, and a 20° slope is provided on both sides of the sludge collecting tank, and the surface lining of the sludge collecting tank is an ultra-high molecular weight polyethylene plate with a friction coefficient of less than 0.1; the sludge intercepted by the filter dam or the attachments washed off will be deposited in the filter dam sludge collecting tank, thereby preventing the sludge from accumulating at the bottom of the filter dam and affecting the phosphorus removal effect of the filter dam; when the sludge accumulates excessively, the function of the filter dam will also be affected. Therefore, it is necessary to use a lifting mechanism to drive the filter dam down during the non-drainage stage of the aquaculture tail water so that the filter dam is completely located in the filter dam receiving tank, and then use the discharged receiving water to flush the sludge collecting tank to flush away the sludge in the sludge collecting tank, so as to achieve regular cleaning of the sludge collecting tank; Each filter dam is equipped with a lifting mechanism, which is used to drive the filter dam up and down. The height of the filter dam can be adjusted according to the water level, and when discharging flood water, it will not hinder the flow of flood water, avoiding affecting the discharge speed. During the non-drainage period of aquaculture tail water, in order to protect the dephosphorization filler in the dephosphorization reactor of the filter dam, the lifting mechanism drives the filter dam down, so that the filter dam is completely located in the filter dam holding tank, thereby preventing the dephosphorization filler in the dephosphorization reactor of the filter dam from being exposed to the natural environment and aging and failure. The cleaning mechanism further comprises a transmission box, a transmission shaft is rotatably arranged inside the transmission box, and a motor for driving the transmission shaft to rotate is arranged on the top of the transmission box; both ends of the transmission shaft pass through both ends of the transmission box respectively and are located outside the transmission box, and travel gears are respectively installed at both ends of the transmission shaft located outside the transmission box, two racks are arranged between the two side walls, and the travel gears at both ends of the transmission shaft are respectively engaged with the two racks; at least two slide rails are arranged between the two side walls, and the bottom of the transmission box is slidably connected to the slide rails; the bottom of the transmission box is rotatably connected to a roller brush for scrubbing the side of the filter dam, and the top end of the roller brush is located inside the transmission box and is connected to the transmission shaft through a bevel gear set.

2. The variable phosphorus removal interception dam according to claim 1, characterized in that: A fulcrum structure is respectively provided at both ends of the top of the frame, and a slide groove for accommodating the fulcrum structure is formed on the side wall. The slide groove extends in the vertical direction of the side wall. A cavity is provided inside the box body, and the lifting mechanism is arranged in the cavity. The execution end of the lifting mechanism passes vertically upward through the box body and is located in the slide groove and connected to the fulcrum structure.

3. The variable phosphorus removal interception dam according to claim 2, characterized in that: The width of the chute is smaller than the width of the filter dam, and the end of the filter dam is in contact with the side wall.

4. The variable phosphorus removal interception dam according to claim 2, characterized in that: The lifting mechanism comprises two hydraulic push rods or electric push rods that act synchronously, and a mechanical seal is provided at the place where the push rod bodies of the hydraulic push rods or electric push rods pass through the box body.

5. The variable phosphorus removal interception dam according to claim 1, characterized in that: A rubber seal is provided at the top opening of the filter dam containing tank.

6. The variable phosphorus removal interception dam according to claim 1, characterized in that: Liquid level sensors are provided on both sides of each filter dam, and one liquid level sensor is shared between two adjacent filter dams. The liquid level sensors are in communication with an external control system. When the liquid level difference between the two adjacent liquid level sensors on both sides of the filter dam is greater than a preset value, the external control system controls the cleaning mechanism to start cleaning the filter dam.

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