A flocculation sedimentation tank for advanced treatment of sewage

Abstract

This invention relates to the field of wastewater treatment technology, specifically disclosing a flocculation sedimentation tank for advanced wastewater treatment. The tank includes a tank body and multiple sets of folding plate mechanisms disposed within the tank body. The tank body is equipped with an inlet pipe and an outlet pipe. Each folding plate mechanism includes a guide plate slidably disposed vertically within the tank body and a driving assembly for moving the guide plate. Multiple guide plates are arranged vertically in an array. The upper and lower ends of two adjacent guide plates are hinged together, forming multiple peaks and troughs. These hinged guide plates constitute a wave-shaped guide plate assembly. The peaks and troughs of two adjacent guide plate assemblies correspond one-to-one. A flow channel exists between two adjacent guide plate assemblies. The two guide plate assemblies respectively separate the water flow within the tank from the upper and lower ends, causing the water to flow in an "S" shape along the flow channel within the tank body. The beneficial effect of this invention is improved mixing efficiency between wastewater and flocculant.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically to a flocculation sedimentation tank for advanced wastewater treatment. Background Technology

[0002] In the field of wastewater treatment, flocculation sedimentation tanks are used to promote the formation of flocs and sedimentation of suspended particles, colloidal substances and some organic pollutants in wastewater, which plays an important role in improving wastewater treatment efficiency. However, existing flocculation sedimentation tanks have problems such as uneven mixing, poor adaptability to different flow conditions and insufficient disturbance in local areas during the mixing process of wastewater and flocculant. Therefore, it is necessary to improve the mixing effect between wastewater and flocculant by improving the baffle structure and dosing method.

[0003] Existing technologies, such as the vertical folded plate flocculation tank anti-sludge device disclosed in Chinese authorized patent CN220745528U, mainly improve the collision effect of sewage during the flow process by setting multiple folded plates inside the tank to form a deflection flow channel. It has the advantages of extending the sewage flow path and improving flocculation efficiency. However, its folded plate structure is usually a fixed structure, and it is impossible to adjust the flow channel according to the change of influent flow rate. At the same time, the flocculant is mostly added in a centralized manner, and the mixing area between sewage and flocculant is relatively simple, which easily leads to local uneven mixing.

[0004] The existing solutions have the following problems: First, the width of the guide channels between the existing folded plate structures is usually fixed. When the influent flow rate changes, the flow velocity and disturbance state of the sewage in the guide channels are difficult to adapt to different operating conditions, resulting in a decrease in the collision effect between sewage and flocculant under low flow conditions. Second, the existing dosing structure is usually set in the influent area or outside the guide channel, making it difficult for the flocculant to act directly on the location with strong sewage disturbance, thus affecting the mixing effect between the flocculant and sewage. Third, the spraying range of the existing spraying structure is usually fixed. When the sewage flow rate changes, the spraying state cannot change synchronously, resulting in poor adaptability between the diffusion range of flocculant and the sewage flow state under different operating conditions. Fourth, local sedimentation areas are easily formed in the trough areas of the folded plates, which can easily affect the flow state in the guide channels after long-term operation. Summary of the Invention

[0005] This invention provides a flocculation sedimentation tank for deep treatment of wastewater, aiming to solve the technical problem in related technologies that the flow velocity and disturbance state of wastewater in the diversion channel are difficult to adapt to different operating conditions when the influent flow rate changes.

[0006] A flocculation sedimentation tank for deep treatment of sewage includes a tank body and multiple sets of folding plate mechanisms disposed within the tank body. The tank body is provided with an inlet pipe and an outlet pipe. The multiple sets of folding plate mechanisms include guide plates slidably disposed within the tank body in a vertical direction and a drive assembly for driving the guide plates to move. The multiple guide plates are arranged in an array in a vertical direction. The upper and lower ends of two adjacent guide plates are hinged together. The multiple hinged guide plates form multiple peaks and troughs, and the multiple mutually hinged guide plates constitute a wave-shaped guide plate assembly. The peaks and troughs between two adjacent guide plate assemblies correspond one-to-one, and there is a guide channel between two adjacent guide plate assemblies. The two guide plate assemblies respectively separate the water flow in the tank body from the upper end and the lower end, so that the water flow in the tank body flows in an "S" shape along the guide channel. The spraying mechanism is located in the trough between two adjacent upper and lower guide plates, and is used to spray flocculant into the sewage outside the trough. A water flow detection mechanism is installed inside the water inlet pipe to detect the water flow rate. A controller is provided between the water flow detection mechanism and the motor of the drive component. The controller controls the rotation direction of the motor according to the detected flow rate, so that the guide plate assembly retracts upward or expands downward, thereby changing the width of the guide channel.

[0007] By placing the spraying mechanism in the trough area formed by the backflow of sewage, the flocculant can directly act on the location where the sewage flow direction changes. When the sewage flows in the trough area, it will form local disturbances and changes in flow direction, thereby improving the diffusion effect of flocculant in sewage. At the same time, the guide plate assembly can contract or expand according to the influent flow rate, so that sewage under different flow conditions can form corresponding flow velocity changes and flow disturbances in the guide channel, thereby improving the contact effect between sewage and flocculant.

[0008] Preferably, the drive assembly includes a drive shaft rotatably mounted on the pool body and a motor disposed on the pool body. The output end of the motor is connected to the drive shaft. The drive shaft passes through a guide plate on the same flow guide assembly in a vertical direction, and the drive shaft is threadedly connected to one of the guide plates.

[0009] Through the transmission relationship between the drive shaft and the guide plate, the drive shaft can drive multiple guide plates to change position synchronously when it rotates, thereby causing the guide plate assembly to contract or expand as a whole. The deformation of the guide plate assembly changes the width of the guide channel between adjacent guide plate assemblies, so that the flow velocity and disturbance state of the sewage inside the guide channel change with the flow rate.

[0010] Preferably, the guide plate has a spherical through hole, a ball sleeve is rotatably installed in the through hole, the drive shaft passes through the ball sleeve, and the lowermost ball sleeve is threaded to the drive shaft, while the other ball sleeves are smooth rods at the connection points with the drive shaft.

[0011] By utilizing the rotatable connection between the ball sleeve and the spherical through hole, multiple guide vanes can rotate during the contraction or expansion of the guide vane assembly, thereby reducing interference between the multiple guide vanes during deformation and ensuring the stability of the guide vane assembly during deformation.

[0012] Preferably, multiple connecting plates, multiple telescopic plates, and multiple frame plates are slidably installed in the pool body along the left-right direction. The connecting plates and frame plates are alternately arranged in the pool body along the left-right direction, and two adjacent connecting plates and frame plates are respectively hinged to the uppermost guide plates of two adjacent guide plate assemblies. The telescopic plates are hinged to the lowermost guide plate of the guide plate assembly with the frame plate at the upper end.

[0013] The deflector assembly is connected and supported by connecting plates, telescopic plates, and frame plates, and the movement direction of the deflector assembly is restricted during the deformation process, so that the deflector assembly maintains the corresponding guiding state during the contraction or expansion process.

[0014] Preferably, the connecting plate, telescopic plate and frame plate are provided with sliders at both ends, and multiple sliding grooves are opened in the pool body, and the sliders are slidably installed in the sliding grooves in the left and right direction.

[0015] The sliding engagement between the slider and the groove guides the connecting plate, telescopic plate, and frame plate, keeping multiple components stable during movement and reducing the possibility of displacement of the guide plate assembly during deformation.

[0016] Preferably, the lower end of the telescopic plate abuts against the bottom surface inside the pool, and the upper end of the connecting plate extends beyond the upper surface of the sewage.

[0017] By restricting the flow area of ​​sewage through expansion joints and connecting plates, the sewage is made to flow back and forth along multiple guide channels inside the tank, reducing the situation where sewage flows directly over the guide plate assembly, thereby increasing the flow distance and residence time of sewage inside the guide channels.

[0018] Preferably, the spraying mechanism includes a dosing assembly and two spraying plates disposed at the trough. The two spraying plates are respectively connected to two adjacent downward guide plates, and the two spraying plates, the inner wall of the pool, and the two guide plates together form a spraying chamber. There is a spraying gap between the two spraying plates to allow the flocculant in the spraying chamber to be sprayed out. When the guide plates move upward, the two spraying plates move closer to each other, reducing the spraying gap; conversely, the spraying gap increases.

[0019] By varying the width of the spray gaps, the flow rate and spray range of the flocculant can be synchronously changed with the width of the guide channel. When the guide channel is small, the flow rate of the flocculant is increased to enhance the collision effect between the flocculant and the wastewater. When the guide channel is large, the spray range of the flocculant is increased to enhance the diffusion effect of the flocculant over a larger area.

[0020] Preferably, the dosing assembly includes a dosing pipe disposed in the tank, a sleeve sleeved on the drive shaft, and a flexible hose for connecting the sleeve and the spraying plate. The drive shaft is hollow, a dosing pump is connected to one end of the dosing pipe, the other end of the dosing pipe is sleeved on the drive shaft, and multiple through dosing holes are opened on the drive shaft. The flexible hose is used to connect the inside of the drive shaft and the spraying chamber.

[0021] By forming a drug delivery channel inside the drive shaft, the flocculant can be delivered from inside the drive shaft to the spraying mechanism, reducing the number of additional drug delivery pipelines inside the tank.

[0022] Preferably, the sleeve is provided with two flexible hoses, and the spray plate has a drug inlet hole that connects to the spray chamber. One end of the two flexible hoses passes through the sleeve and connects to the inside of the drive shaft, and the other end connects to the drug inlet holes on the two spray plates at the troughs.

[0023] Flocculant is delivered into the spraying chamber formed between the two spraying plates through two hoses, so that the flocculant can be sprayed evenly through the spraying gaps and the distribution effect of the flocculant in the trough area is improved.

[0024] Preferably, the front and rear ends of the guide plate are respectively provided with rubber layers to improve the sealing between the guide plate and the inner wall of the pool.

[0025] By reducing the contact between the elastic sealing layer and the inner wall of the pool, the flow of sewage from both sides of the guide plate is reduced, allowing the sewage to mainly flow along the inside of the guide channel, thereby improving the backflow effect of the sewage inside the guide channel.

[0026] By adopting the above technical solution, the beneficial effects of the present invention are as follows: 1. By setting up a spraying mechanism in the trough area formed by the guide plate assembly, the flocculant can be directly sprayed to the location where the sewage flow direction changes. When the sewage flows in the trough area, it will form a local disturbance, thereby improving the diffusion effect of the flocculant in the sewage and increasing the contact area between the sewage and the flocculant. 2. By driving the baffle assembly to contract or expand, the width of the guide channel between adjacent baffle assemblies can be changed according to the influent flow rate, so that the sewage can maintain the corresponding flow velocity and disturbance state under different flow conditions, thereby improving the mixing effect between sewage and flocculant under different working conditions. 3. By synchronously changing the spray gap width with the deformation of the guide plate assembly, the spraying state of the spraying mechanism corresponds to the change in the width of the guide channel. When the guide channel is small, the flow rate of the flocculant sprayed is increased, so that a larger velocity difference is formed between the flocculant and the sewage after spraying, thereby improving the collision and mixing effect between the flocculant and the sewage. 4. When the width of the flow channel is increased, the spraying gap width is increased to increase the spraying range of the flocculant, thereby increasing the diffusion range of the flocculant in the sewage under larger flow conditions, so as to meet the sewage treatment needs under different flow conditions. 5. By rotating the ball sleeve and the spherical through hole, multiple guide vanes can rotate during the deformation of the guide vane assembly, thereby reducing interference between the multiple guide vanes and improving the stability of the guide vane assembly during contraction and expansion. 6. The guide vane assembly is supported and guided by the connecting plate, telescopic plate and frame plate, so that the guide vane assembly maintains the corresponding direction of movement during deformation and reduces the possibility of the guide vane assembly deviating during movement; 7. The sliding fit between the slider and the slide groove guides the connecting plate, telescopic plate and frame plate, thereby improving the stability of multiple components during movement; 8. By forming a drug delivery channel inside the drive shaft, the drive assembly and the dosing assembly are integrated into a structure, reducing the number of additional drug delivery pipelines inside the tank and reducing the impact of multiple drug delivery pipelines on the sewage flow. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 This is a cross-sectional view of the pool body of the present invention.

[0029] Figure 3 This is a front view of the folding plate mechanism of the present invention.

[0030] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0031] Figure 5 This is a diagram showing the expansion of the spray gap in this invention.

[0032] Figure 6 This is a schematic diagram of the frame plate of the present invention.

[0033] Figure label: 1. Pool body; 11. Inlet pipe; 12. Outlet pipe; 2. Folding plate mechanism; 21. Guide plate; 22. Ball sleeve; 23. Motor; 24. Drive shaft; 25. Connecting plate; 26. Telescopic plate; 27. Frame plate; 28. Slider; 3. Spraying mechanism; 31. Spraying plate; 32. Spraying gap; 33. Spraying chamber; 34. Inlet pipe; 35. Sleeve; 36. Hose. Detailed Implementation

[0034] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0035] like Figures 1-6 As shown in the figure, a flocculation sedimentation tank for deep treatment of wastewater according to an embodiment of the present invention includes a tank body 1, multiple baffle mechanisms 2, a spraying mechanism 3, and a water volume detection mechanism. The multiple baffle mechanisms 2 are arranged inside the tank body 1. Wastewater flows in an "S"-shaped backflow within the guide channel formed by the baffle mechanisms 2 inside the tank body 1. During the flow, the spraying mechanism 3 sprays flocculant into the guide channel, so that the flocculant and wastewater are mixed during the backflow and form flocs that settle in the subsequent sedimentation area. When the water volume detection mechanism detects a change in the influent flow rate, the drive component drives the baffle mechanism 2 to deform, thereby changing the width of the guide channel and simultaneously changing the spraying state of the spraying mechanism 3, so as to adapt to the mixing requirements of wastewater and flocculant under different flow conditions.

[0036] The pool body 1 is a cuboid structure. The interior of the pool body 1 is used to contain sewage. The pool body 1 is equipped with an inlet pipe 11 and an outlet pipe 12. The inlet pipe 11 is located on one side of the pool body 1 and is used to transport the sewage to be treated into the pool body 1. The outlet pipe 12 is located on the other side of the pool body 1 and is used to discharge the sewage after flocculation treatment. Multiple folding plate mechanisms 2 are arranged at intervals in the left and right direction, and multiple flow guiding channels are formed between the multiple folding plate mechanisms 2.

[0037] Multiple sliding grooves are provided on the inner walls of the front and rear sides of the pool body 1. The sliding grooves extend in the left and right direction to guide the folding plate mechanism 2. The inner wall of the pool body 1 is also provided with a sealing area to improve the sealing performance and reduce the flow of sewage from both sides of the folding plate mechanism 2.

[0038] like Figures 1-6As shown, the folding plate mechanism 2 includes multiple guide plates 21 and a driving assembly for moving the guide plates 21. The multiple guide plates 21 are arranged in an array along the vertical direction. Each guide plate 21 is a plate-shaped structure and extends along the front-back direction. The upper and lower ends of two adjacent guide plates 21 are hinged together, so that the multiple guide plates 21 can be folded or unfolded in the vertical direction. The multiple mutually hinged guide plates 21 together form a wave-shaped guide plate assembly. Multiple peaks and troughs are formed on the guide plate assembly. The multiple peaks and troughs are arranged alternately along the vertical direction. The peaks and troughs between two adjacent guide plate assemblies are arranged one-to-one, so that a guide channel that reciprocates along the vertical direction is formed between adjacent guide plate assemblies.

[0039] In the folding plate mechanism 2, two adjacent guide plate assemblies are respectively spaced apart from the top and bottom of the pool body 1. A gap is formed between the top of one guide plate assembly and the top of the pool body 1, and a gap is formed between the bottom of the other guide plate assembly and the bottom of the pool body 1. When the sewage flows in the guide channel, it flows from the top of one guide plate assembly to the space between adjacent guide plate assemblies, and then flows out from the bottom of the adjacent guide plate assembly, thus forming an "S"-shaped zigzag flow path between multiple guide plate assemblies. The sewage continuously changes its flow direction during the flow process to increase the probability of collision between particles inside the sewage.

[0040] like Figures 1-3 As shown, the drive assembly includes a motor 23 and a drive shaft 24. The motor 23 is mounted on the top of the pool body 1, and its output end is connected to the drive shaft 24. The drive shaft 24 is vertically inserted through multiple guide plates 21 within the same guide plate assembly. The drive shaft 24 is rotatably mounted on the top of the pool body 1. When the motor 23 operates, it drives the drive shaft 24 to rotate. The drive shaft 24 and the lowest ball sleeve 22 are connected by a thread to form an axial movement relationship. A spherical through hole is provided on the guide plate 21, extending along the thickness direction of the guide plate 21. The ball sleeve 22 is rotatably mounted inside the through hole, and a rotatable connection is formed between the ball sleeve 22 and the through hole. The drive shaft 24 extends vertically through the interior of multiple ball sleeves 22 disposed on the same guide plate assembly. The drive shaft 24 is threadedly connected to the lowest ball sleeve 22, while the remaining ball sleeves 22 are slidably fitted to the drive shaft 24. When the drive shaft 24 rotates, it drives the lowest ball sleeve 22 to move vertically through the threaded connection, and drives the entire guide plate assembly to contract or expand through the hinge relationship between the multiple guide plates 21. When the guide plate assembly contracts upward, the width of the guide channel between two adjacent guide plate assemblies decreases, and when the guide plate assembly expands downward, the width of the guide channel between two adjacent guide plate assemblies increases.

[0041] The pool body 1 is also equipped with multiple connecting plates 25, multiple telescopic plates 26, and multiple frame plates 27. The connecting plates 25, telescopic plates 26, and frame plates 27 are all slidably disposed inside the pool body 1 in the left-right direction. The connecting plates 25 and frame plates 27 are alternately disposed in the left-right direction, and adjacent connecting plates 25 and frame plates 27 are respectively hinged to the uppermost guide plates 21 of two adjacent guide plate assemblies. The telescopic plates 26 are hinged to the lowermost guide plates 21 of the guide plate assembly with frame plates 27 at the upper end. Rectangular sliders 28 are provided at the front and rear ends of the connecting plates 25, telescopic plates 26, and frame plates 27. Multiple sliding grooves are opened on the inner walls of the front and rear sides of the pool body 1. The sliders 28 are slidably installed in the sliding grooves in the left-right direction. Through the cooperation between the sliders 28 and the sliding grooves, the connecting plates 25, telescopic plates 26, and frame plates 27 remain stable during movement, while limiting their offset direction.

[0042] The lower end of the telescopic plate 26 is set to abut against the inner bottom surface of the pool body 1 to block the sewage, so that the sewage forms a zigzag flow path between the adjacent guide plate assemblies. The upper end of the telescopic plate 26 is the telescopic end, which is connected to the guide plate assembly. The upper end of the connecting plate 25 is located above the sewage surface to prevent the sewage from flowing directly over the top of the connecting plate 25. The frame plate 27 has a channel for sewage to flow inside, so that the sewage can continue to flow through the frame plate 27, thereby forming a continuous "S" shaped flow path.

[0043] like Figures 1-5 As shown, the spraying mechanism 3 includes multiple dosing components and two spraying plates 31 set at the trough. The two spraying plates 31 are respectively connected to two adjacent guide plates 21. The spraying plates 31 extend along the trough direction, and a spraying gap 32 is formed between the two spraying plates 31. The two spraying plates 31, the guide plates 21 and the inner wall of the pool 1 together form a spraying chamber 33. The inside of the spraying chamber 33 is used to contain flocculant, and the spraying gap 32 is used to spray the flocculant inside the spraying chamber 33 into the guide channel.

[0044] The dosing assembly includes a dosing pipe 34, a sleeve 35, and two hoses 36. The drive shaft 24 is a hollow structure, and a dosing channel for conveying flocculant is formed inside the drive shaft 24. The dosing pipe 34 is located inside the tank body 1. One end of the dosing pipe 34 is connected to a dosing pump (not shown in the figure), and the other end is connected to the inside of the drive shaft 24. Multiple dosing holes are opened on the drive shaft 24. The dosing holes are used to convey the flocculant inside the drive shaft 24 to the sleeve 35. The sleeve 35 is fitted outside the drive shaft 24. Two hoses 36 are set on the sleeve 35. The spray plate 31 has a dosing hole that communicates with the spray chamber 33. The other ends of the two hoses 36 are connected to the dosing holes on the two spray plates 31 respectively, so that the flocculant enters the spray chamber 33 from inside the drive shaft 24 and is then sprayed out through the spray gap 32.

[0045] The spraying slit 32 extends along the front-to-back direction. The dosing pump adopts a constant pressure liquid supply method. When the guide plate assembly retracts, the two spraying plates 31 move closer to each other, reducing the width of the spraying slit 32 and increasing the pressure in the spraying chamber 33 accordingly. This allows the flocculant to be sprayed out at a higher flow rate. At the same time, the width of the guide channel decreases, increasing the flow rate of the sewage in the guide channel. After the flocculant is sprayed out, a larger velocity difference is formed between it and the sewage, thereby improving the collision and mixing effect between the flocculant and the sewage. When the guide plate assembly unfolds, the two spraying plates 31 move further apart, increasing the width of the spraying slit 32 and expanding the range of flocculant spraying to meet the sewage treatment needs under larger flow conditions.

[0046] The water volume detection mechanism (not shown in the figure) uses an electromagnetic flow meter or an ultrasonic flow meter, which is installed inside the inlet pipe 11 to detect the instantaneous volumetric flow rate in real time. The flow meter is connected to the controller via a signal line. Preferably, the controller can be a programmable logic controller (PLC). The output of the PLC is electrically connected to the driver of the motor 23. The PLC has a preset flow threshold. When the detected instantaneous flow rate is lower than the threshold, the PLC judges that the water volume is small and sends a forward rotation command to the driver. The motor 23 drives the vertical screw-shaped drive shaft 24 to rotate. The rotational motion is converted into linear lifting motion through the threaded engagement between the drive shaft 24 and the lowermost ball sleeve 22. This drives the lowermost guide plate 21 to move upward and, with the help of the hinge linkage between multiple guide plates, causes the entire wave-shaped guide plate assembly to contract upward, thereby reducing the width of the guide channel between adjacent guide plate assemblies and increasing the sewage flow rate. Conversely, when the instantaneous flow rate is higher than the threshold, the PLC sends a reverse rotation command, and the guide plate assembly unfolds downward, increasing the width of the guide channel to adapt to high flow conditions.

[0047] Rubber layers are provided at both the front and rear ends of the guide plate 21. The rubber layers are set to abut against the inner wall of the pool body 1 to improve the sealing between the guide plate 21 and the inner wall of the pool body 1, reduce the flow of sewage from both sides of the guide plate 21, and allow the sewage to mainly flow along the guide channel when it flows inside the pool body 1, thereby improving the backflow effect of the sewage inside the guide channel.

[0048] The implementation principle of the flocculation sedimentation tank for advanced wastewater treatment according to the present invention is as follows: After the sewage enters the tank 1 through the inlet pipe 11, it first enters the guide channel formed between two adjacent guide plate assemblies. Since the adjacent guide plate assemblies are spaced apart from the top and bottom of the tank 1, the sewage forms an "S" shaped backflow in the guide channel. During the flow, the sewage passes through multiple trough areas. The spraying mechanism 3 continuously sprays flocculant into the trough areas. After being sprayed through the spraying gap 32, the flocculant enters the guide channel and mixes with the sewage under the disturbance caused by the backflow of the sewage. The suspended particles in the sewage gradually form flocs under the action of the flocculant.

[0049] When the influent flow rate decreases, the water volume detection mechanism transmits the detection signal to the drive component. The drive component drives the guide plate assembly to retract upward, reducing the width of the guide channel between adjacent guide plate assemblies. At the same time, the two spray plates 31 move closer to each other, reducing the width of the spray gap 32. The flow rate of the flocculant sprayed increases, and the flow rate of the sewage inside the guide channel also increases, thereby improving the collision and mixing effect between the flocculant and the sewage.

[0050] When the influent flow rate increases, the drive component drives the guide plate assembly to expand downward, increasing the width of the guide channel between adjacent guide plate assemblies. At the same time, the two spray plates 31 move away from each other, increasing the width of the spray gap 32 and the range of flocculant spraying, in order to meet the sewage treatment needs under larger flow conditions. After the sewage continuously flows back and forth in multiple guide channels, it is discharged from the effluent pipe 12 and enters the subsequent sedimentation area to complete the sedimentation treatment.

[0051] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A flocculation sedimentation tank for deep treatment of sewage, comprising a tank body (1) and multiple sets of baffle mechanisms (2) disposed within the tank body (1), wherein an inlet pipe (11) and an outlet pipe (12) are provided on the tank body (1), characterized in that, The multi-plate mechanism (2) includes a guide plate (21) that is slidably disposed in the pool body (1) in the vertical direction and a drive assembly for driving the guide plate (21) to move. Multiple guide plates (21) are arranged in an array in the vertical direction. The upper and lower ends of two adjacent guide plates (21) are hinged together. Multiple hinged guide plates (21) form multiple peaks and valleys. Multiple mutually hinged guide plates (21) constitute a wave-shaped guide plate assembly. The peaks and valleys between two adjacent guide plate assemblies correspond one-to-one. There is a guide channel between two adjacent guide plate assemblies. The two guide plate assemblies separate the water flow in the pool body (1) from the upper end and the lower end respectively, so that the water flow in the pool body (1) flows in an "S" shape along the guide channel. The spraying mechanism (3) is located at the trough between two adjacent guide plates (21) and is used to spray flocculant into the sewage outside the trough. A water flow detection mechanism is installed inside the water inlet pipe (11) to detect the water flow rate. A controller is provided between the water flow detection mechanism and the motor (23) of the drive assembly. The controller controls the rotation direction of the motor (23) according to the detected flow rate so that the guide plate assembly retracts upward or expands downward, thereby changing the width of the guide channel.

2. The flocculation sedimentation tank for advanced wastewater treatment according to claim 1, characterized in that, The drive assembly includes a drive shaft (24) rotatably mounted on the pool body (1) and a motor (23) mounted on the pool body (1). The output end of the motor (23) is connected to the drive shaft (24). The drive shaft (24) passes through a guide plate (21) on the same guide assembly in a vertical direction, and the drive shaft (24) and one of the guide plates (21) are connected by a thread.

3. The flocculation sedimentation tank for advanced wastewater treatment according to claim 2, characterized in that, The guide plate (21) has a spherical through hole, and a ball sleeve (22) is rotatably installed in the through hole. The drive shaft (24) passes through the ball sleeve (22), and the ball sleeve (22) at the bottom is threaded to the drive shaft (24). The connection between the other ball sleeves (22) and the drive shaft (24) is a smooth rod.

4. The flocculation sedimentation tank for advanced wastewater treatment according to claim 3, characterized in that, Multiple connecting plates (25), multiple telescopic plates (26) and multiple frame plates (27) are slidably installed in the pool body (1) along the left and right direction. The connecting plates (25) and frame plates (27) are alternately arranged in the pool body (1) along the left and right direction. Two adjacent connecting plates (25) and frame plates (27) are respectively hinged to the uppermost guide plate (21) of two adjacent guide plate assemblies. The telescopic plate (26) is hinged to the lowermost guide plate (21) of the guide plate assembly with the frame plate (27) at the upper end.

5. The flocculation sedimentation tank for advanced wastewater treatment according to claim 4, characterized in that, The connecting plate (25), telescopic plate (26) and frame plate (27) are all provided with sliders (28) at both ends. Multiple sliding grooves are opened in the pool body (1), and the sliders (28) are slidably installed in the inner edge of the sliding grooves in the left and right directions.

6. The flocculation sedimentation tank for advanced wastewater treatment according to claim 5, characterized in that, The lower end of the telescopic plate (26) is pressed against the bottom surface of the inner side of the pool body (1), and the upper end of the connecting plate (25) extends beyond the upper surface of the sewage.

7. The flocculation sedimentation tank for advanced wastewater treatment according to claim 1, characterized in that, The spraying mechanism (3) includes a dosing component and two spraying plates (31) set at the trough. The two spraying plates (31) are respectively connected to two adjacent guide plates (21) below. The two spraying plates (31), the inner wall of the pool body (1) and the two guide plates (21) together form a spraying chamber (33). There is a spraying gap (32) between the two spraying plates (31) for spraying out the flocculant in the spraying chamber (33). When the guide plate (21) moves upward, the two spraying plates (31) move closer to each other, making the spraying gap (32) smaller. Conversely, the spraying gap (32) becomes larger.

8. The flocculation sedimentation tank for advanced wastewater treatment according to claim 7, characterized in that, The dosing assembly includes a dosing pipe (34) installed in the tank (1), a sleeve (35) sleeved on the drive shaft (24), and a hose (36) for connecting the sleeve (35) and the spray plate (31). The drive shaft (24) is hollow. One end of the dosing pipe (34) is connected to a dosing pump. The other end of the dosing pipe (34) is sleeved on the drive shaft (24), and the drive shaft (24) has multiple through dosing holes. The hose (36) is used to connect the inside of the drive shaft (24) and the spray chamber (33).

9. A flocculation sedimentation tank for advanced wastewater treatment according to claim 8, characterized in that, Two hoses (36) are provided on the sleeve (35). The spray plate (31) has a drug inlet hole that connects to the spray chamber (33). One end of the two hoses (36) passes through the sleeve (35) and connects to the inside of the drive shaft (24). The other end connects to the drug inlet holes on the two spray plates (31) at the trough.

10. A flocculation sedimentation tank for advanced wastewater treatment according to claim 1, characterized in that, The front and rear ends of the guide plate (21) are respectively provided with rubber layers to improve the sealing between the guide plate (21) and the inner wall of the pool body (1).

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