Improved sedimentation tank
By setting up multiple water barriers in the improved sedimentation tank to form a large annular density flow, the problems of poor mud-water separation and scum accumulation in traditional sedimentation tanks are solved, and better mud-water separation and higher hydraulic power are achieved load.
Patent Information
- Application Number
- CN202421237997.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-05-31
AI Technical Summary
Traditionally, the inlet and outflow radial flow sedimentation tank has secondary flow and heterofluid flow, resulting in poor separation of mud and water, and the accumulation of scum on the surface of the sedimentation tank, limiting the hydraulic load of the pond.
An improved sedimentation tank is designed, and by providing a plurality of water barriers in the pool body, including a first water barrier, a second water barrier, a third water barrier and a fourth water barrier, these water barriers are used. The rebound and drainage of the plate in the tilt direction form a large annular density flow, thereby achieving better mud-water separation.
A stable large annular density flow is achieved, the mud-water separation effect is improved, the scum on the surface of the sedimentation tank is reduced, and the hydraulic load is increased.
Smart Images
Figure CN222468156U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sewage treatment, in particular to an improved sedimentation tank for sewage treatment. Background Art
[0002] Sedimentation tank is a kind of structure that uses sedimentation to remove suspended matter in water. Sedimentation tank is widely used in wastewater treatment. There are many types of sedimentation tanks. According to the direction of water flow in the tank, it can be divided into three types: horizontal flow sedimentation tank, vertical flow sedimentation tank and radial flow sedimentation tank. Among them, radial flow sedimentation tank is the most widely used.
[0003] Radial flow sedimentation tanks are mostly circular in plan, but there are also square ones. Sewage enters the tank from the water inlet pipe and flows slowly around the tank in the radial direction. Suspended matter settles during the flow and enters the sludge area along the slope of the tank bottom. Clarified water overflows from the tank periphery to the canal. At present, the sedimentation tanks used for sewage treatment mainly include radial flow sedimentation tanks with central inlet and peripheral outlet and radial flow sedimentation tanks with peripheral inlet and peripheral outlet. Most traditional sedimentation tanks use radial flow sedimentation tanks with central inlet and peripheral outlet.
[0004] In actual engineering, the activated sludge mixture in the central inlet and outlet sedimentation tank enters the tank from the central inlet pipe at a relatively high flow rate, forming a vortex, gradually descending to the sludge layer through the water distribution well, and then flowing along the middle of the sedimentation area toward the tank wall and forming a circulation. Part of the separated clarified water overflows into the water tank, and part of it flows back from the edge of the tank to the center of the tank on the top, and the high-density mixed liquid flows from the edge of the tank to the center of the tank below, forming a reverse flow circulation. This circulation is not conducive to sedimentation and limits the hydraulic load of the tank. Due to the secondary flow and density flow in the conventional central inlet and outlet sedimentation tank, the two circulations lead to poor mud-water separation and accumulation of scum on the surface of the secondary sedimentation tank. Utility Model Content
[0005] Based on the above problems, the purpose of the utility model is to provide an improved sedimentation tank, which can achieve a stable large annular density flow, has a good mud-water separation effect, and can greatly reduce the scum on the surface of the sedimentation tank.
[0006] To achieve the above-mentioned purpose, the utility model provides an improved sedimentation tank, including a tank body provided with a water inlet pipe and a water outlet pipe, the tank body having a cavity with an opening at the top, the water inlet pipe communicating with the cavity and arranged at the bottom of the tank body, the water outlet pipe communicating with and arranged at the top of the tank body, a water distribution well communicating with the water inlet pipe is arranged in the middle of the cavity, a water distribution hole communicating with the cavity and the water inlet pipe is arranged on the side wall of the water distribution well, a first water baffle is arranged facing the water distribution hole, the first water baffle surrounds the water distribution hole and has an opening at the bottom, the opening A second water baffle is arranged at the bottom, and the second water baffle surrounds the water distribution well and the upper surface is inclined to face the opening, and the upper surface of the second water baffle is inclined in the direction facing the peripheral wall of the pool body. A third water baffle and a fourth water baffle are arranged in sequence outside the second water baffle, and the second water baffle, the third water baffle and the fourth water baffle are all fixed to the bottom of the cavity and the third water baffle has the largest height, and the upper surfaces of the third water baffle and the fourth water baffle are both inclined in the direction facing the water distribution well, and a mud discharge pipe is arranged at the bottom of the cavity.
[0007] The technical solution adopted by the utility model has at least the following technical effects.
[0008] (1) The water inlet pipe is connected to the cavity and is arranged at the lower part of the tank body, the water outlet pipe is connected to and is arranged at the upper part of the tank body, a water distribution well connected to the water inlet pipe is arranged in the middle of the cavity, a water distribution hole connected to the cavity and the water inlet pipe is arranged on the side wall of the water distribution well, and a mud discharge pipe is arranged at the bottom of the cavity, so that sewage enters the cavity through the water inlet pipe, the water distribution well, and the water distribution hole in sequence, and mud and water are separated in the cavity, the clear liquid is discharged through the upper water outlet pipe, and the mud residue at the bottom is discharged through the mud discharge pipe.
[0009] (2) The first water baffle plate surrounds the water distribution hole and has an opening at the bottom. The second water baffle plate is arranged below the opening. The second water baffle plate surrounds the water distribution well and the upper surface is inclined to face the opening. The upper surface of the second water baffle plate is inclined in the direction facing the peripheral wall of the pool body. The third water baffle plate and the fourth water baffle plate are arranged outside the second water baffle plate in sequence. The second water baffle plate, the third water baffle plate and the fourth water baffle plate are all fixed to the bottom of the cavity and the third water baffle plate has the largest height. The upper surfaces of the third water baffle plate and the fourth water baffle plate are all inclined in the direction facing the water distribution well. Through the structural arrangement of the first water baffle plate, the second water baffle plate, the third water baffle plate and the fourth water baffle plate, the muddy water entering the cavity flows downward from the water distribution hole to the second water baffle plate. Under the rebound effect of the second water baffle plate, the muddy water then flows to the third water baffle plate and the fourth water baffle plate in sequence, reducing the frontal impact on the sludge at the bottom of the cavity. Under the rebound effect of the peripheral wall of the cavity and the drainage effect of the inclined direction of the third water baffle plate and the fourth water baffle plate, the muddy water flows back to form a large annular density flow (such as Figures 3-4 As a result, better mud-water separation can be achieved and the scum on the surface of the sedimentation tank can be greatly reduced.
[0010] (3) The second water baffle, the third water baffle and the fourth water baffle are all fixed to the bottom of the cavity, which are not easily affected by the impact of mud and water and are durable. The third water baffle has the largest height, which can not only guide the backflow, but also block the flow of mud residue, making it easier for the mud residue to settle to the bottom of the cavity.
[0011] As a technical solution of the utility model, the water distribution well includes a main body extending upward from the bottom of the cavity and a platform portion protruding from the main body in the horizontal direction, and a hollow cavity connected to the water inlet pipe is provided in the main body.
[0012] As a technical solution of the utility model, the water distribution hole is arranged on the main body and communicates with the hollow cavity, and the first water baffle is fixed to the main body and the platform part.
[0013] As a technical solution of the present utility model, the first water baffle is fixed to the water distribution well by means of a first bracket.
[0014] As a technical solution of the present invention, one end of the first bracket is fixed to the first water baffle, and the other end is fixed to the outer wall of the water distribution well. The fixed position of the first bracket and the water distribution well is lower than the water distribution hole.
[0015] As a technical solution of the present invention, the lower parts of the second water baffle plate, the third water baffle plate and the fourth water baffle plate are respectively fixed with a second bracket, and the second water baffle plate, the third water baffle plate and the fourth water baffle plate are respectively fixed to the bottom of the cavity by the second bracket.
[0016] As a technical solution of the present invention, the second bracket is a triangular bracket.
[0017] As a technical solution of the present utility model, the second water baffle plate, the third water baffle plate and the fourth water baffle plate are all closed annular plates, and the upper surfaces of the annular plates are all inclined surfaces.
[0018] As a technical solution of the utility model, it also includes a water outlet weir, which is close to the peripheral wall of the cavity and connected to the water outlet pipe.
[0019] As a technical solution of the utility model, it also includes a sewage discharge device, and the sewage discharge device is connected to the mud discharge pipe. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a top view of an embodiment of the improved sedimentation tank of the utility model.
[0021] Figure 2 It is a top view of a cross-sectional view of an improved sedimentation tank according to the utility model.
[0022] Figure 3 for Figure 1 Cross-sectional view along the AA direction.
[0023] Figure 4 for Figure 1 Cross-sectional view along the BB direction.
[0024] Figure 5 The utility model is a schematic diagram of a method for fixing a water retaining plate in an improved sedimentation tank.
[0025] Component Symbols
[0026] 100-improved sedimentation tank; 10-tank body; 11-cavity; 12-mud discharge pipe; 13-water distribution well; 131-body; 133-platform; 135-water distribution hole; 15-water baffle; 151-first water baffle; 1511-first bracket; 153-second water baffle; 155-third water baffle; 157-fourth water baffle; 17-water inlet pipe; 19-water outlet pipe; 30-sewage discharge device; 50-second bracket; 70-water outlet weir DETAILED DESCRIPTION
[0027] In order to better illustrate the purpose, technical solution and beneficial effects of the utility model, the utility model will be further described below in conjunction with the accompanying drawings. It should be noted that the following drawings and descriptions are further explanations of the utility model and should not be used as limitations of the utility model.
[0028] The sedimentation tank of the utility model can be used as a sewage primary sedimentation tank, a secondary sedimentation tank and a deep treatment coagulation sedimentation tank. Figures 1 to 4 As shown, the sedimentation tank 100 of the utility model includes a tank body 10 provided with a water inlet pipe 17 and a water outlet pipe 19. The tank body 10 has a cavity 11 with an opening at the top, the water inlet pipe 17 is connected to the cavity 11 and is arranged at the bottom of the tank body 10, and the water outlet pipe 19 is connected to and arranged at the top of the tank body 10. A water distribution well 13 connected to the water inlet pipe 17 is arranged in the middle of the cavity 11, a water distribution hole 135 connected to the cavity 11 and the water inlet pipe 17 is arranged on the side wall of the water distribution well 13, and a mud discharge pipe 12 is arranged at the bottom of the cavity 11. Due to the arrangement of the water inlet pipe 17, the water outlet pipe 19, the water inlet pipe of the water distribution well 13, the water distribution hole 135 and the mud discharge pipe 11, the sewage enters the cavity 11 through the water inlet pipe 17, the water distribution well 13, the water distribution hole 135 in sequence, and the mud and water are separated in the cavity 11, the clear liquid is discharged through the water outlet 19 at the top, and the mud residue at the bottom is discharged through the mud discharge pipe 12.
[0029] Continue as Figures 1 to 4As shown, a plurality of water baffles 15 are arranged in the cavity 11 of the sedimentation tank 100. Among them, a first water baffle 151 is arranged facing the water distribution hole 135, the first water baffle 151 surrounds the water distribution hole 135 and is provided with an opening at the bottom, a second water baffle 153 is arranged below the opening, the second water baffle 153 surrounds the water distribution well 13 and the upper surface is inclined to face the opening, the upper surface of the second water baffle 153 is inclined in the direction facing the peripheral wall of the tank body 10, and a third water baffle 155 and a fourth water baffle 157 are arranged in sequence outside the second water baffle 153. The second water baffle 153, the third water baffle 155 and the fourth water baffle 157 are all fixed to the bottom of the cavity 11 and the height dimension of the third water baffle 155 is the largest, and the upper surfaces of the third water baffle 155 and the fourth water baffle 157 are all inclined in the direction facing the water distribution well 13. Through the structural arrangement of the first water baffle 151, the second water baffle 153, the third water baffle 155 and the fourth water baffle 157, the muddy water entering the cavity 11 flows downward from the water distribution hole 135 to the second water baffle 153, and under the rebound effect of the second water baffle 153, the muddy water then flows to the third water baffle 155 and the fourth water baffle 157 in sequence, which reduces the frontal impact on the mud at the bottom of the cavity 11. Under the rebound of the surrounding wall of the cavity 11 and the drainage effect of the third water baffle 155 and the fourth water baffle 157 in the inclined direction, the muddy water flows back to form a large annular density flow, thereby achieving better mud-water separation, and the scum on the surface of the sedimentation tank can be greatly reduced. The third water baffle 155 has the largest height dimension, which can not only guide the backflow, but also block the flow of mud slag, so that the mud slag is convenient for the mud slag to be deposited at the bottom of the cavity 11.
[0030] Further Figures 3 to 5 As shown, the lower parts of the second water baffle 153, the third water baffle 155 and the fourth water baffle 157 are respectively fixed with a second bracket 50, and the second water baffle 153, the third water baffle 155 and the fourth water baffle 157 are respectively fixed to the bottom of the cavity 11 by the second bracket 50. The second water baffle 153, the third water baffle 155 and the fourth water baffle 157 are all fixed to the bottom of the cavity 11, are not easily affected by the impact of mud and water, and are durable. Furthermore, the second bracket 50 is a triangular bracket, which can be stably fixed to the bottom of the cavity 11. In addition, as Figure 2 As shown, the second water baffle plate 153, the third water baffle plate 155 and the fourth water baffle plate 157 are all closed annular plates, and the upper surfaces of the annular plates are all inclined surfaces, and the inclination angle of the inclined surface can be 10-20 degrees. Figures 3-4As shown, the first water baffle 151 is fixed to the water distribution well 13 by means of a first bracket 1511. One end of the first bracket 1511 is fixed to the first water baffle 151, and the other end opposite is vertically fixed to the outer wall of the water distribution well 13, and the fixed position of the first bracket 1511 and the water distribution well 13 is lower than the water distribution hole 135. After the sewage flows out of the water distribution hole 135, it flows downward through the first bracket 1511 and flows out, so the first bracket 1511 not only plays a fixed support role, but also plays a drainage role.
[0031] It is further necessary to explain that if Figures 3-4 As shown, the water distribution well 13 includes a body 131 extending upward from the bottom of the cavity 11 and a platform portion 133 protruding from the body 131 in the horizontal direction, and a hollow cavity connected to the water inlet pipe 17 is provided in the body 131. The water distribution hole 135 is provided on the body 131 and connected to the hollow cavity, and the first water baffle 151 is not only fixed to the body 131 through the first bracket 1511, but also can be further fixed to the platform portion 133. The improved sedimentation tank 100 also includes a water outlet weir 70, which is close to the peripheral wall of the cavity 11 and connected to the water outlet pipe 19. In addition, the improved sedimentation tank 100 may also include a sewage discharge device 30, and the sewage discharge device 30 is connected to the mud discharge pipe 12. The sewage discharge device 30 can adopt a conventional device, as long as it can remove the sludge at the bottom of the improved sedimentation tank 100.
[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the protection scope of the utility model. Although the utility model is described in detail with reference to the preferred embodiments, it is not limited to the embodiments. Ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.
Claims
1. An improved sedimentation tank, characterized in that: The invention comprises a pool body provided with a water inlet pipe and a water outlet pipe, wherein the pool body has a cavity with an opening at the top, the water inlet pipe is connected to the cavity and is arranged at the bottom of the pool body, the water outlet pipe is connected to and is arranged at the top of the pool body, a water distribution well connected to the water inlet pipe is arranged in the middle of the cavity, a water distribution hole connected to the cavity and the water inlet pipe is arranged on the side wall of the water distribution well, a first water baffle is arranged facing the water distribution hole, the first water baffle surrounds the water distribution hole and is provided with an opening at the bottom, a second water baffle is arranged below the opening, and the second A water baffle plate surrounds the water distribution well and its upper surface is inclined toward the opening. The upper surface of the second water baffle plate is inclined in the direction facing the peripheral wall of the pool body. A third water baffle plate and a fourth water baffle plate are sequentially arranged outside the second water baffle plate. The second water baffle plate, the third water baffle plate and the fourth water baffle plate are all fixed to the bottom of the cavity and the third water baffle plate has the largest height. The upper surfaces of the third water baffle plate and the fourth water baffle plate are both inclined toward the direction facing the water distribution well. A mud discharge pipe is arranged at the bottom of the cavity.
2. The improved sedimentation tank according to claim 1, characterized in that: The water distribution well comprises a main body extending upward from the bottom of the cavity and a platform portion protruding from the main body in a horizontal direction. A hollow cavity communicating with the water inlet pipe is arranged in the main body.
3. The improved sedimentation tank according to claim 2, characterized in that: The water distribution hole is arranged on the main body and communicates with the hollow cavity, and the first water baffle is fixed to the main body and the platform part.
4. The improved sedimentation tank according to claim 1, characterized in that: The first water baffle is fixed to the water distribution well by means of a first bracket.
5. The improved sedimentation tank according to claim 4, characterized in that: One end of the first bracket is fixed to the first water baffle, and the other end is fixed to the outer wall of the water distribution well. The fixing position of the first bracket and the water distribution well is lower than the water distribution hole.
6. The improved sedimentation tank according to claim 1, characterized in that: The lower parts of the second water baffle plate, the third water baffle plate and the fourth water baffle plate are respectively fixed with a second bracket, and the second water baffle plate, the third water baffle plate and the fourth water baffle plate are respectively fixed to the bottom of the cavity by the second bracket.
7. The improved sedimentation tank according to claim 6, characterized in that: The second bracket is a tripod bracket.
8. The improved sedimentation tank according to claim 1, characterized in that: The second water baffle plate, the third water baffle plate and the fourth water baffle plate are all closed annular plates, and the upper surfaces of the annular plates are all inclined surfaces.
9. The improved sedimentation tank according to claim 1, characterized in that: It also includes a water outlet weir, which is close to the peripheral wall of the cavity and connected to the water outlet pipe.
10. The improved sedimentation tank according to claim 1, characterized in that: It also includes a sewage discharge device, which is connected to the mud discharge pipe.