Sewage treatment device for water conservancy project

Abstract

The invention relates to the technical field of sewage treatment, in particular to a sewage treatment device for hydraulic engineering. The device comprises a bearing seat arranged at the top of a treatment tank, and the bearing seat is rotationally connected with a main rod towards the axis in the treatment tank; the outer wall of the treatment tank is sleeved with an interlayer, and a separation cavity is defined by the inner wall of the interlayer and the outer wall of the treatment tank; along with the increase of sewage treatment time, the amount of aggregates generated on the inner side of the intercepting plate is gradually increased, and in a centrifugal force field generated by stirring of the stirring assembly, the larger the weight of the aggregates is, the easier the aggregates move in the direction away from the axis of the main rod. Meanwhile, under the driving of the paddles with different heights, the aggregate ascends along the inclined surface of the inner wall of the intercepting plate; therefore, the rising liquid drives a large aggregate reaching the height position of the fixed arm, and the large aggregate passes through the separation hole along with a small amount of sewage under the overflow action, reaches the separation cavity and falls to the cleaning hole, so that the aggregate is cleaned on the premise of continuously treating the sewage.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically, to a wastewater treatment device for water conservancy projects. Background Technology

[0002] Wastewater from water conservancy projects comes from a wide range of sources, including domestic sewage from surrounding residents, irrigation runoff from farmland, and may also be mixed with surface runoff during the flood season, oily wastewater from ships, and mechanical oil pollution from the maintenance of water conservancy facilities. It may even contain large suspended solids such as silt, dead branches, and fallen leaves. Current technologies typically involve adding flocculants to wastewater treatment ponds to cause impurities to form aggregates, which are then intercepted by filtration mechanisms, thereby purifying the wastewater.

[0003] For example, the invention patent with publication number CN119797546A discloses an industrial wastewater treatment device with a telescopic mechanism. The key technical points of the solution are: the industrial wastewater to be treated is purified through a treatment chamber; the telescopic feeding mechanism is used to store flocculant; the transfer mechanism is used to drive the telescopic feeding mechanism to move, so as to change the position of the telescopic feeding mechanism to spread flocculant; the stirring mechanism is used to stir the industrial wastewater flowing through the treatment chamber so that the flocculant and the industrial wastewater can be in full contact; and the filtration mechanism is used to intercept the flocculants generated by the wastewater.

[0004] Although the aforementioned industrial wastewater treatment device can intercept agglomerates formed by flocculants and impurities in wastewater through the filtration mechanism, the following problems still exist in the actual wastewater treatment process: Since the filter holes on the interceptor plate are distributed along the axial direction of the treatment chamber, the impact force of the water flow on the filter holes along the axial direction of the treatment chamber is not stable. As the agglomerates gradually increase, they are prone to clogging of the filter holes.

[0005] In view of this, we propose a sewage treatment device for water conservancy projects to improve the above-mentioned shortcomings. Summary of the Invention

[0006] This invention provides a wastewater treatment device for water conservancy projects, which solves the problem that agglomerates formed by flocculants and impurities easily clog the filtration mechanism.

[0007] To achieve the above objectives, the sewage treatment device for the water conservancy project includes a bearing seat installed at the top of the treatment tank, and a main rod is rotatably connected to the bearing seat at the center of the inside of the treatment tank. The outer wall of the treatment tank is fitted with a double layer, and the inner wall of the double layer and the outer wall of the treatment tank form a separation cavity. The upper part of the separation cavity is connected to the inside of the treatment tank, and the lower part of the separation cavity is connected to the outside. An interceptor plate is fitted on the outer wall of the main rod. The bottom of the interceptor plate is rotatably connected to the main rod. The outer wall of the interceptor plate is fixedly connected to the inner wall of the treatment tank. A stirring assembly is coaxially arranged between the main rod and the interceptor plate. A dosing assembly for adding flocculant is provided at the top of the treatment tank. The end of the stirring assembly away from the main rod is adapted to the shape of the inner sidewall of the interceptor plate. The inner and outer sides of the interceptor plate are connected radially along the treatment pool, and the radius of the interceptor plate gradually narrows from high to low. The stirring assembly is used to drive the agglomerates formed by the flocculant and impurities to rise along the inner sidewall of the interceptor plate and overflow into the separation chamber.

[0008] In the above technical solution, since the inner and outer sides of the interceptor plate are radially connected, the strong radial flow generated when the stirring component stirs the sewage at high speed can clear the connection between the inner and outer sides of the interceptor plate, preventing it from being blocked by agglomerates and affecting the sewage purification efficiency.

[0009] Based on this, a circular mounting plate is fixedly connected to the inner wall of the treatment tank, a guide rail is fixedly connected to the top of the circular mounting plate, a sliding seat is slidably connected to the top of the guide rail, and a drug storage chamber is provided on the side of the sliding seat near the axis of the treatment tank. The drug storage chamber is used to spread flocculant into the sewage.

[0010] Furthermore, multiple pulleys are rotatably connected inside the sliding seat, and the multiple pulleys respectively conform to the outer wall of the guide rail. The rotation of the pulleys is driven by a motor.

[0011] Furthermore, a limiting plate is provided between the sliding seat and the medicine storage cavity. The limiting plate is fixedly connected to the sliding seat, and the medicine storage cavity is slidably connected to the side of the limiting plate away from the sliding seat. The trajectory of the medicine storage cavity along the limiting plate is always parallel to the tangent of the position of the sliding seat on the guide rail.

[0012] With this design, the speed of the sliding seat can be changed by altering the motor speed during movement, thereby enabling the feeding of flocculant stored in the drug storage chamber.

[0013] In another technical solution, the stirring assembly includes multiple mounting seats that are coaxially and fixedly connected to the main rod. The mounting seats are spaced apart along the axial direction of the main rod, and multiple blades are fixedly connected to each mounting seat radially.

[0014] Along the top-to-bottom direction, the length of each blade gradually shortens to fit the shape of the inner wall of the interceptor plate. The angle between the blade and the horizontal plane is an acute angle, which is used to drive the agglomerates to rise along the inclined surface of the blade.

[0015] Based on the above, blades at different heights are staggered on the horizontal projection plane. Along the direction of blade rotation, the blades at the top are used to drive the aggregates lifted below them to continue upward.

[0016] This technical solution uses a series of paddles to drive the agglomerates upwards along the inner inclined surface of the interceptor plate until they overflow into the separation chamber due to the rising liquid level at the edge of the sewage. This achieves the separation of agglomerates in sewage without shutting down the entire device, thereby improving the sewage treatment efficiency.

[0017] In addition, the sidewall of the interceptor plate is provided with multiple filter holes along the radial direction to withstand the radial flow of the blades and to clear the inside of the filter holes. The top of the interceptor plate is fixedly connected to a fixed arm, and the outer wall of the fixed arm is fixedly connected to the inner wall of the treatment tank.

[0018] Next, the end of the blade away from the main rod is adapted to the inclined surface of the side wall of the interceptor plate, and the end of the blade away from the main rod is adjacent to the inner side wall of the interceptor plate.

[0019] The upper part of the treatment pool has multiple separation holes for connecting the treatment pool and the separation chamber, and the bottom of the interlayer has multiple cleaning holes for connecting the separation chamber and the outside.

[0020] As can be seen from the above scheme, the strong radial force generated when the impeller stirs the sewage at high speed will impact the agglomerates accumulated in the filter holes, thereby clearing the filter holes.

[0021] Based on the above description, the beneficial effects of the present invention compared with the prior art are as follows: 1. Because the filter holes are radially distributed along the interceptor plate, the strong radial force generated by the high-speed stirring of sewage by the impeller will impact the aggregates accumulated in the filter holes, thereby clearing the filter holes. 2. As the wastewater treatment time increases, the amount of agglomerates generated inside the interceptor plate gradually increases. In the centrifugal force field generated by the mixing component, the larger the agglomerate, the easier it is for it to move away from the main shaft axis. Simultaneously, driven by blades at different heights, the agglomerates rise along the inclined inner wall of the interceptor plate. Therefore, the rising liquid carries the larger agglomerates that have reached the height of the fixed arm. Through the overflow, the agglomerates follow a small amount of sewage through the separation hole into the separation chamber and fall to the cleaning hole, so as to clean the agglomerates while continuously treating sewage. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a perspective view of the overall structure of the present invention; Figure 2 This is a partial cross-sectional perspective view of the present invention; Figure 3 This is a side view of the overall process principle of the present invention; Figure 4 This is a three-dimensional structural view of the drug delivery component of the present invention; Figure 5 This is a three-dimensional structural view of the stirring assembly of the present invention; Figure 6 This is a top view of the stirring assembly of the present invention; Figure 7 This is a cross-sectional perspective view of the interceptor plate of the present invention; Figure 8 This is a side view illustrating the principle of the blade and interceptor plate of the present invention. Figure 9 This is a side view illustrating the principle of the interceptor plate, blades, and interlayer separation of aggregates according to the present invention.

[0023] The meanings of the labels in the diagram are as follows: 100. Treatment tank; 101. Wastewater inlet; 102. Clean water outlet; 103. Bearing housing; 110. Main rod; 120. Interception plate; 121. Filter hole; 122. Fixing arm; 130. Interlayer; 131. Separation hole; 132. Cleaning hole; 200. Agitator assembly; 210. Mounting base; 220. Paddle blades; 300. Dosing assembly; 310. Guide rail; 320. Sliding seat; 330. Pulley; 340. Limiting plate; 350. Drug storage chamber. Detailed Implementation

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In existing technologies, the filter holes on the interceptor plate are distributed along the axial direction of the treatment chamber. The impact force of the water flow on the filter holes along the axial direction of the treatment chamber is not stable. As the number of aggregates gradually increases, it is easy to cause blockage of the filter holes. Moreover, when the demand for wastewater treatment increases, such as when treating wastewater from water conservancy projects such as reservoirs and rivers, the treatment chamber needs to be cleaned every once in a while, especially to remove the aggregates that clog the filter holes, which leads to a decrease in the efficiency of wastewater purification.

[0026] Please see Figures 1-3 In order to solve the problems existing in the prior art, the purpose of the present invention is to provide a sewage treatment device for water conservancy projects. The treatment device includes a bearing seat 103 disposed on the top of the treatment tank 100, and a main rod 110 is rotatably connected to the bearing seat 103 at the axis inside the treatment tank 100. The outer wall of the treatment tank 100 is fitted with a sandwich layer 130. The inner wall of the sandwich layer 130 and the outer wall of the treatment tank 100 form a separation cavity. The upper part of the separation cavity is connected to the interior of the treatment tank 100, and the lower part of the separation cavity is connected to the outside. An interceptor plate 120 is fitted on the outer wall of the main rod 110. The bottom of the interceptor plate 120 is rotatably connected to the main rod 110. The outer wall of the interceptor plate 120 is fixedly connected to the inner wall of the treatment tank 100. A stirring assembly 200 is coaxially arranged between the main rod 110 and the interceptor plate 120. A dosing assembly 300 for adding flocculant is provided on the top of the treatment tank 100. The end of the stirring assembly 200 away from the main rod 110 is adapted to the shape of the inner wall of the interceptor plate 120. The inner and outer sides of the interceptor plate 120 are connected radially along the treatment tank 100, and the radius of the interceptor plate 120 gradually narrows from high to low. The stirring assembly 200 is used to drive the agglomerates formed by the flocculant and impurities to rise along the inner wall of the interceptor plate 120 and overflow into the separation chamber.

[0027] In practice, firstly, sewage from the water conservancy project is introduced into the treatment tank 100 through the sewage inlet 101 at the top of the treatment tank 100. Then, flocculant is introduced into the sewage in the treatment tank 100 through the dosing component 300. The flocculant combines with impurities in the sewage to form agglomerates. The agglomerates are intercepted by the interception plate 120, and the purified water passes through the interception plate 120 and flows out from the clean water outlet 102.

[0028] As the wastewater treatment time increases, the amount of agglomerates generated inside the interceptor plate 120 gradually increases. In the centrifugal force field generated by the stirring component 200, the larger the agglomerate's weight (i.e., the greater its density / mass ratio), the easier it is for it to move away from the axis of the main rod 110. Simultaneously, because the liquid level stirred by the stirring component 200 exhibits a phenomenon where the center is lower than the edges, the agglomerates located away from the main rod 110 gradually rise along the inner wall of the interceptor plate 120 and overflow into the separation chamber as the liquid level rises at the edges. This achieves automatic cleaning of the agglomerates generated inside the interceptor plate 120, avoiding the need to shut down the entire device to clean its filtration mechanism after each period of wastewater treatment, as is required in existing wastewater treatment systems. This is particularly suitable for treating large volumes of wastewater from water conservancy projects.

[0029] Moreover, since the inner and outer sides of the interceptor plate 120 are radially connected, the strong radial flow generated when the stirring component 200 stirs the sewage at high speed can clear the connection between the inner and outer sides of the interceptor plate 120, preventing it from being blocked by agglomerates and affecting the sewage purification efficiency.

[0030] For a better understanding of the above content, please refer to [link / reference]. Figure 4The process of dispensing flocculant using the dosing component 300 is disclosed. A circular mounting plate is fixedly connected to the inner wall of the treatment tank 100. A guide rail 310 is fixedly connected to the top of the circular mounting plate. A sliding seat 320 is slidably connected to the top of the guide rail 310. A storage chamber 350 is provided on the side of the sliding seat 320 near the axis of the treatment tank 100. The storage chamber 350 is used to spread flocculant into the sewage.

[0031] Furthermore, multiple pulleys 330 are rotatably connected inside the sliding seat 320. The multiple pulleys 330 respectively fit against the outer wall of the guide rail 310, and the rotation of the pulleys 330 is driven by a motor.

[0032] Furthermore, a limiting plate 340 is provided between the sliding seat 320 and the medicine storage cavity 350. The limiting plate 340 is fixedly connected to the sliding seat 320, and the medicine storage cavity 350 is slidably connected to the side of the limiting plate 340 away from the sliding seat 320. The trajectory of the medicine storage cavity 350 sliding along the limiting plate 340 is always parallel to the tangent of the position of the sliding seat 320 on the guide rail 310.

[0033] It should be noted that the shape of the guide rail 310 in this embodiment is set to be circular to adapt to the internal shape of the processing pool 100. In actual use, it can be changed according to the actual shape of the processing pool 100, for example, it can be set to be a rounded rectangle.

[0034] After the wastewater is introduced into the treatment tank 100, the power supply to the motor connected to the pulley 330 is turned on. The pulley 330 begins to rotate under the drive of the motor. Friction exists between the pulley 330 and the outer wall of the guide rail 310, and this friction is the driving force that drives the sliding seat 320 to rotate along the trajectory of the guide rail 310. Simultaneously, the storage chamber 350 moves along the trajectory of the guide rail 310 following the sliding seat 320. During this movement, the speed of the sliding seat 320 is changed by altering the motor speed, thereby discharging the flocculant stored in the storage chamber 350. For example, by braking or accelerating the sliding seat 320, the storage chamber 350 slides along the tangential direction of the sliding seat 320 under the action of inertial force, thus discharging the flocculant in the storage chamber 350 into the wastewater.

[0035] Next, as Figure 5 and Figure 6 As shown, the stirring assembly 200 includes a plurality of mounting seats 210 that are coaxially and fixedly connected to the main rod 110. The mounting seats 210 are spaced apart along the axial direction of the main rod 110, and a plurality of blades 220 are fixedly connected to each mounting seat 210 in the radial direction.

[0036] Along the top-to-bottom direction, the length of each blade 220 gradually shortens to fit the shape of the inner wall of the interceptor plate 120. The angle between the blade 220 and the horizontal plane is an acute angle, which is used to drive the agglomerates to rise along the inclined surface of the blade 220.

[0037] Based on the above, blades 220 at different heights are staggered on the horizontal projection plane. Along the rotation direction of the blades 220, the blades 220 located at the top are used to drive the aggregates lifted below them to continue upward.

[0038] In other words, when the main rod 110 is driven by the motor to rotate each blade 220, the inclined surface of the lowest blade 220, designated as the first drive blade, drives the agglomerates upward. Along the direction of rotation of the main rod 110, the inclined surface of the blade 220 located above and upstream of the first drive blade, designated as the second drive blade, takes over from the first drive blade and drives the lifted agglomerates to continue rising. In this way, one blade 220 after another drives the agglomerates to rise along the inner inclined surface of the interceptor plate 120 until, under the action of the rising liquid level at the edge of the sewage, they overflow into the separation chamber. This achieves the separation of agglomerates in sewage without shutting down the entire device, thereby improving the sewage treatment efficiency.

[0039] Based on the above explanation, the following will further combine... Figures 7-9 The preferred effect of the interceptor plate 120 in this embodiment is explained as follows: The sidewall of the interceptor plate 120 is provided with a plurality of filter holes 121 along the radial direction to withstand the radial flow of the blade 220 and to unclog the inside of the filter holes 121. The top of the interceptor plate 120 is fixedly connected to a fixing arm 122, and the outer wall of the fixing arm 122 is fixedly connected to the inner wall of the treatment pool 100.

[0040] Next, the end of the blade 220 away from the main rod 110 is adapted to the inclined surface of the side wall of the interceptor plate 120, and the end of the blade 220 away from the main rod 110 is adjacent to the inner side wall of the interceptor plate 120.

[0041] The upper part of the treatment tank 100 is provided with a plurality of separation holes 131 for connecting the treatment tank 100 and the separation chamber, and the bottom of the interlayer 130 is provided with a plurality of cleaning holes 132 for connecting the separation chamber and the outside.

[0042] It should be disclosed that, since the filter holes 121 are radially distributed along the interceptor plate 120, the strong radial force generated by the impeller 220 when stirring the sewage at high speed will have an impact force on the agglomerates accumulated in the filter holes 121, thereby clearing the filter holes 121.

[0043] In addition, when the blade 220 rotates at high speed, it will cause the sewage and the aggregates therein to move in a circular motion. At this time, the aggregates are subjected to two key forces: Centrifugal force: its direction is away from the 220° axis of the blade, and its calculation formula is F=m r, where m is the mass of the aggregate, ω is the angular velocity, and r is the radius of rotation. The larger the mass of the aggregate, the greater the centrifugal force, and the easier it is to overcome the viscous resistance of the wastewater and move towards the outer region away from the axis. Viscous resistance: directed towards the 220° axis of the impeller, generated by the friction between the wastewater and the aggregate, and related to the velocity and particle size of the aggregate.

[0044] Large agglomerates, whose centrifugal force is much greater than their viscous resistance, will migrate rapidly to the outside; while small flocs or impurities, whose centrifugal force is insufficient to overcome the resistance, will move with the wastewater in the region near the axis, thus achieving the graded separation of light and heavy agglomerates.

[0045] As the aggregates grow heavier, they gradually move closer to the sidewall of the interceptor plate 120. Simultaneously, driven by the blades 220 at different heights, the aggregates rise along the inclined inner wall of the interceptor plate 120. Due to the parabolic rotation phenomenon of the liquid driven by centrifugal force—when the blades 220 rotate, they cause the wastewater to move in a circular motion—the liquid particles are subjected to centrifugal force, and their direction is away from the axis of the blades 220, i.e., towards the sidewall of the main rod 110. The centrifugal force pushes the liquid towards the sidewall of the main rod 110, causing the liquid level to rise near the sidewall of the main rod 110 due to accumulation.

[0046] Therefore, the rising liquid carries the larger agglomerates that have reached the height of the fixed arm 122. Through the overflow, the agglomerates follow a small amount of sewage through the separation hole 131 into the separation chamber and fall to the cleaning hole 132 so that the agglomerates can be cleaned while continuously treating sewage.

[0047] The working principle of the wastewater treatment device will be explained in detail below: First, wastewater from the water conservancy project is introduced into the treatment tank 100 through the wastewater inlet 101 at the top of the treatment tank 100. Then, flocculant is added to the wastewater in the treatment tank 100 through the dosing component 300. The flocculant combines with impurities in the wastewater to form agglomerates. The agglomerates are intercepted by the interception plate 120, and the purified water passes through the interception plate 120 and flows out from the clean water outlet 102.

[0048] As the wastewater treatment time increases, the amount of agglomerates generated inside the interceptor plate 120 gradually increases. In the centrifugal force field generated by the stirring component 200, the greater the weight of the agglomerates (i.e., the greater their density / mass ratio), the easier it is for them to move away from the axis of the main rod 110. Simultaneously, because the liquid level stirred by the stirring component 200 exhibits a phenomenon where the center is lower than the edges, the heavier agglomerates gradually move closer to the sidewall of the interceptor plate 120. Driven by the blades 220 at different heights, the agglomerates rise along the inclined surface of the inner wall of the interceptor plate 120. Furthermore, due to the parabolic rotation phenomenon of the liquid driven by centrifugal force—when the blades 220 rotate, they cause the wastewater to move in a circular motion—the liquid particles, under the influence of centrifugal force, move in a direction away from the axis of the blades 220, i.e., towards the sidewall of the main rod 110. This centrifugal force propels the liquid towards the sidewall of the main rod 110, causing the liquid level near the sidewall of the main rod 110 to rise due to accumulation.

[0049] Therefore, the rising liquid carries the larger agglomerates that reach the height of the fixed arm 122. Through the overflow, the agglomerates follow a small amount of sewage through the separation hole 131 into the separation chamber and fall to the cleaning hole 132, so as to clean the agglomerates while continuously treating sewage.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sewage treatment device for hydraulic engineering, comprising a bearing seat (103) arranged on the top of a treatment tank (100), and a main rod (110) rotationally connected to the center of the treatment tank (100); characterized in that: the outer wall of the treatment tank (100) is sleeved with a sandwich layer (130), the inner wall of the sandwich layer (130) and the outer wall of the treatment tank (100) form a separation cavity, the upper part of the separation cavity is communicated with the inside of the treatment tank (100), and the lower part of the separation cavity is communicated with the outside; the outer wall of the main rod (110) is sleeved with an intercepting plate (120), the bottom of the intercepting plate (120) is rotationally connected with the main rod (110), the outer wall of the intercepting plate (120) is fixedly connected with the inner wall of the treatment tank (100), a stirring assembly (200) is coaxially arranged between the main rod (110) and the intercepting plate (120), and the top of the treatment tank (100) is provided with a dosing assembly (300) for feeding flocculants. The end of the stirring assembly (200) away from the main rod (110) is adapted to the shape of the inner side wall of the intercepting plate (120), the inner and outer side walls of the intercepting plate (120) are radially communicated along the treatment tank (100), and the radius of the intercepting plate (120) gradually narrows from high to low, and the stirring assembly (200) is used for driving the agglomerates formed by flocculants and impurities to rise along the inner side wall of the intercepting plate (120) and overflow into the separation cavity. The inner side wall of the treatment tank (100) is fixedly connected with a circular ring mounting plate, the top of the circular ring mounting plate is fixedly connected with a guide rail (310), the top of the guide rail (310) is slidingly connected with a sliding seat (320), the sliding seat (320) is provided with a storage cavity (350) on the side close to the axis of the treatment tank (100), and the storage cavity (350) is used for scattering flocculants into sewage. A plurality of pulleys (330) are rotationally connected in the sliding seat (320), the plurality of pulleys (330) are respectively attached to the outer wall of the guide rail (310), and the rotation of the pulleys (330) is driven by a motor.

2. The sewage treatment device for hydraulic engineering according to claim 1, characterized in that: A limiting plate (340) is arranged between the sliding seat (320) and the storage cavity (350), the limiting plate (340) is fixedly connected with the sliding seat (320), the storage cavity (350) is slidingly connected to the side of the limiting plate (340) away from the sliding seat (320), and the track of the storage cavity (350) sliding along the limiting plate (340) is always parallel to the tangent of the position of the sliding seat (320) on the guide rail (310).

3. The sewage treatment device for hydraulic engineering according to claim 2, characterized in that: The stirring assembly (200) comprises a plurality of mounting seats (210) fixedly connected with the main rod (110) in a coaxial manner, the mounting seats (210) are spaced apart along the axial direction of the main rod (110), and a plurality of paddles (220) are fixedly connected with each mounting seat (210) in a radial direction.

4. The sewage treatment device for hydraulic engineering according to claim 2, characterized in that: From top to bottom, the length of each paddle (220) gradually shortens to adapt to the shape of the inner side wall of the intercepting plate (120), the paddle (220) and the horizontal plane form an acute angle, and the paddle (220) is used for driving the agglomerates to rise along the inclined surface of the paddle (220).

5. The water treatment device according to claim 1, wherein: ​ 6. The sewage treatment device for hydraulic engineering according to claim 5, characterized in that: ​ 7. The sewage treatment device for hydraulic engineering according to claim 5, characterized in that: The paddles (220) of different heights are staggered with each other on the horizontal projection plane, and the upper paddles (220) are used to drive the agglomerates lifted thereunder to continue moving upward along the rotation direction of the paddles (220).

8. The sewage treatment apparatus for hydraulic engineering according to claim 5, characterized by: The side wall of the intercepting plate (120) is provided with a plurality of filter holes (121) in the radial direction, which are used to withstand the radial flow of the paddles (220) to realize the dredging of the inside of the filter holes (121). The top of the intercepting plate (120) is fixedly connected with a fixed arm (122), and the outer wall of the fixed arm (122) is fixedly connected with the inner wall of the treatment tank (100).

9. The sewage treatment apparatus for hydraulic engineering according to claim 5, characterized by: The end of the paddle (220) away from the main rod (110) is adapted to the slope of the side wall of the intercepting plate (120), and the end of the paddle (220) away from the main rod (110) is adjacent to the inner side wall of the intercepting plate (120).

10. The sewage treatment apparatus for hydraulic engineering according to claim 1, characterized by: The upper part of the treatment tank (100) is provided with a plurality of separation holes (131) for connecting the treatment tank (100) and the separation cavity, and the bottom of the interlayer (130) is provided with a plurality of cleaning holes (132) for connecting the pipe separation cavity and the outside.

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