Sedimentation tank for sewage treatment

Abstract

The utility model discloses a sedimentation tank for sewage treatment, and relates to the technical field of sewage treatment. The sedimentation tank for sewage treatment comprises a tank body, the tank body comprises a pretreatment tank and a main treatment tank which are arranged at an interval through a porous wall, a plurality of water through holes are formed in the bottom of the porous wall, and the end face, close to the main treatment tank, of the porous wall is connected with a baffle in a sliding mode through a sliding groove. In order to overcome the defect that sludge at the bottom of the sedimentation tank is easy to impact when sewage enters the sedimentation tank, the water distribution pipes are arranged, and the water outlets of the water distribution pipes are positioned at the right upper end of the trapezoidal groove, so that the sewage can be prevented from being concentrated at a certain point and rushing to the bottom of the sedimentation tank at a higher vertical speed; and the pre-precipitation and buffering effects on the sewage can be achieved, so that large-particle substances in the sewage can be precipitated to the bottom of the pretreatment tank in advance, and the solid content and the flow velocity of the sewage entering the main treatment tank are reduced.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a sedimentation tank for wastewater treatment. Background Technology

[0002] When wastewater is introduced into the sedimentation tank through the inlet, it impacts the sludge at the bottom of the tank. This is because the inlet of most sedimentation tanks is not set up properly. The inlet is too high and there is only one inlet point, which causes the wastewater to concentrate at one point and rush towards the bottom of the tank at a large vertical speed. In addition, the wastewater contains a large amount of silt. When the silt particles rush towards the bottom of the tank with the wastewater at a large vertical speed, they will break up the relatively stable sludge structure at the bottom of the tank, causing the sludge to be stirred up and resuspended in the water, thereby reducing the sedimentation effect.

[0003] Therefore, in order to solve the problem that sewage entering the sedimentation tank easily impacts the sludge at the bottom of the tank, it is necessary to propose a sedimentation tank for sewage treatment. Utility Model Content

[0004] The purpose of this utility model is to provide a sedimentation tank for sewage treatment. By setting up multiple water distribution pipes with the outlet of the water distribution pipes located at the top of the trapezoidal trough, sewage can be prevented from concentrating at a certain point and rushing to the bottom of the tank at a large vertical velocity. Combined with the partitioned structure of the pretreatment tank, porous wall and main treatment tank, it can play a role in pre-sedimentation and buffering of sewage, so that large particles in the sewage can settle to the bottom of the pretreatment tank in advance, thereby reducing the solid content and flow rate of sewage entering the main treatment tank, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A sedimentation tank for wastewater treatment includes a tank body, which includes a pretreatment tank and a main treatment tank separated by a porous wall. The bottom of the porous wall has multiple water-permeable holes. A baffle is slidably connected to the end face of the porous wall near the main treatment tank via a sliding groove. A hydraulic cylinder is fixedly installed at the top of the porous wall, and the output end of the hydraulic cylinder is fixedly connected to the baffle.

[0007] Preferably, both the pretreatment tank and the main treatment tank are provided with trapezoidal troughs at the bottom for sludge sedimentation.

[0008] Preferably, inclined plates are installed at equal intervals on the walls of the trapezoidal groove at the bottom of the pretreatment pool.

[0009] Preferably, the pool body is symmetrically equipped with water inlet pipes at its front and rear ends, and the surface of the water inlet pipes is provided with inlets for introducing sewage.

[0010] Preferably, a water guide pipe is fixedly installed at the upper end of the pretreatment tank, and a water distribution pipe is sealed at the lower end of the water guide pipe, with the water distribution pipe, the water guide pipe and the water inlet pipe maintaining internal liquid communication.

[0011] Preferably, multiple water distribution pipes are arranged at equal intervals, and one water distribution pipe is arranged between two adjacent inclined plates. The bottom of the water distribution pipe extends downward and is located at the top of the trapezoidal groove.

[0012] Preferably, there are two pretreatment pools, which are arranged symmetrically about the main treatment pool.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This wastewater treatment sedimentation tank uses multiple equally spaced water distribution pipes, with the outlet of each pipe located at the top of a trapezoidal trough. This design changes the traditional single inlet point mode of sedimentation tanks, allowing wastewater to enter the pretreatment tank evenly. It avoids wastewater concentrating at a certain point and rushing to the bottom of the tank at a large vertical speed, effectively reducing the impact on the sludge at the bottom of the tank, preventing the sludge structure from being broken up, thus maintaining the stability of the sludge and helping to improve the sedimentation effect.

[0015] 2. This wastewater treatment sedimentation tank, through its partitioned structure of a pretreatment tank, porous walls, and a main treatment tank, provides pre-sedimentation and buffering space for wastewater flow. Wastewater first enters the pretreatment tank, where the flow rate is initially slowed down, allowing larger particles to settle to the bottom of the pretreatment tank. This significantly reduces the solid content and flow rate of the wastewater when it enters the main treatment tank, mitigating the risk of impact on the sludge at the bottom of the main treatment tank. Attached Figure Description

[0016] Figure 1 This is a perspective view of the overall structure of this utility model;

[0017] Figure 2 This is a structural diagram of the pretreatment tank, porous wall, and main treatment tank of this utility model.

[0018] Figure 3 This is a schematic diagram of the porous wall structure of this utility model;

[0019] In the diagram: 1. Pool body; 11. Pretreatment pool; 12. Main treatment pool; 13. Porous wall; 131. Water through hole; 132. Slide chute; 133. Baffle; 134. Hydraulic cylinder; 14. Trapezoidal trough; 15. Inclined plate; 2. Inlet pipe; 21. Inlet; 3. Water guide pipe; 31. Water distribution pipe. Detailed Implementation

[0020] To address the technical challenges of pretreating wastewater using sedimentation tanks, please refer to [link to relevant documentation]. Figures 1-3This embodiment provides the following technical solution:

[0021] A sedimentation tank for wastewater treatment includes a tank body 1. The tank body 1 includes a pretreatment tank 11 and a main treatment tank 12, which are spaced apart by a porous wall 13. The bottom of the porous wall 13 has a plurality of water through holes 131. The end face of the porous wall 13 near the main treatment tank 12 is slidably connected to a baffle 133 through a sliding groove 132. A hydraulic cylinder 134 is fixedly installed on the top of the porous wall 13, and the output end of the hydraulic cylinder 134 is fixedly connected to the baffle 133.

[0022] Specifically, after the sewage enters the tank 1, it first reaches the pretreatment tank 11. Since the pretreatment tank 11 and the main treatment tank 12 are separated by a porous wall 13, the sewage can undergo preliminary retention and buffering in the pretreatment tank 11. This structure avoids the sewage from directly entering the main treatment tank 12 and prevents impurities and high flow rates in the sewage from directly impacting the main treatment tank 12.

[0023] In the pretreatment stage, the baffle 133 plays a key role in water flow control. Initially, the baffle 133 is in a low position, which blocks the sewage in the pretreatment tank 11 and forms a relatively stable water flow state. This helps large particles in the sewage to settle in the pretreatment tank 11 and prevents them from flowing into the main treatment tank 12 too early. As the sewage stays in the pretreatment tank 11, the silt, larger suspended solids and other impurities in the sewage begin to settle to the bottom of the pretreatment tank 11 under the action of gravity. After the sedimentation is completed, the height of the baffle 133 is raised by the hydraulic cylinder 134, so that the pretreated sewage flows to the main treatment tank 12.

[0024] Please see Figure 2 Both the pretreatment tank 11 and the main treatment tank 12 are equipped with trapezoidal troughs 14 for sludge sedimentation at the bottom.

[0025] It should be noted that the trapezoidal trough 14 is wider at the top and narrower at the bottom. This shape makes it easier for sludge to accumulate in the narrow part of the bottom of the trough under the action of gravity during the sewage flow process. Compared with flat bottoms or other shapes of trough bottoms, the trapezoidal trough 14 can more effectively guide the sludge to settle and reduce the dispersion of sludge at the bottom of the pool.

[0026] The height of the trapezoidal trough 14 is lower than the height of the water inlet 131, so that the sludge will settle directly into the trapezoidal trough 14 and will not flow into the main treatment tank 12 through the water inlet 131.

[0027] Please see Figure 2 Inclined plates 15 are installed at equal intervals on the walls of the trapezoidal groove 14 at the bottom of the pretreatment pool 11.

[0028] It should be noted that the inclined plate 15 effectively increases the sedimentation area without increasing the floor space of the sedimentation tank. When the silt particles in the sewage settle under the action of gravity, they can not only settle at the bottom of the trapezoidal trough 14, but also adhere to the inclined plate 15. The multiple planes of the inclined plate 15 provide more opportunities for sedimentation of silt and other impurities, thereby improving the overall sedimentation efficiency.

[0029] Please see Figure 2 There are two pretreatment pools 11, which are arranged symmetrically about the main treatment pool 12.

[0030] It should be noted that this symmetrical arrangement ensures that the sewage is evenly distributed into the main treatment tank 12. If there is only one pretreatment tank 11, sewage may flow into the main treatment tank 12 in a concentrated manner on one side, resulting in uneven water flow in the main treatment tank 12. Since the two pretreatment tanks 11 supply water to the main treatment tank 12 symmetrically, the water flow in the main treatment tank 12 will not fluctuate greatly due to the impact of water flow on one side.

[0031] To address the technical challenge of effectively improving the inlet design of sedimentation tanks, please refer to [link / reference needed]. Figures 1-2 This embodiment provides the following technical solution:

[0032] The front and rear ends of the tank body 1 are symmetrically equipped with water inlet pipes 2. The surface of the water inlet pipes 2 is provided with water inlet 21 for introducing sewage. The upper end of the pretreatment tank 11 is fixedly installed with a water guide pipe 3. The lower end of the water guide pipe 3 is sealed with a water distribution pipe 31. The water distribution pipe 31, the water guide pipe 3 and the water inlet pipe 2 are kept in liquid communication.

[0033] Multiple water distribution pipes 31 are equidistantly arranged, and one water distribution pipe 31 is arranged between two adjacent inclined plates 15. The bottom of the water distribution pipe 31 extends downward and is located at the top of the trapezoidal groove 14.

[0034] Specifically, multiple equally spaced water distribution pipes 31 can achieve uniform water distribution of sewage in the pretreatment tank 11, and a water distribution pipe 31 is set between two adjacent inclined plates 15. At the same time, the bottom of the water distribution pipe 31 extends downward and is located at the top of the trapezoidal trough 14, so that sewage can be accurately transported to the area that needs to be treated by sedimentation, thereby improving sedimentation efficiency.

[0035] A water distribution system is formed by the inlet pipe 2, the guide pipe 3, and the distribution pipe 31, ensuring that the sewage in the entire pretreatment tank 11 can undergo sedimentation, pretreatment, and other operations under similar hydraulic conditions, and evenly distributing the sewage to each area to avoid local water accumulation or excessively fast water flow.

[0036] Working principle: In this wastewater treatment sedimentation tank, wastewater enters the inlet pipe 2 through the inlet 21, then flows through the guide pipe 3, and finally flows into the pretreatment tank 11 through the distribution pipe 31. The wastewater entering the pretreatment tank 11 is precisely distributed to the area between the two inclined plates 15 above the trapezoidal trough 14 by the guide pipe 3 and the distribution pipe 31. At this time, the silt, larger suspended solids and other impurities in the wastewater begin to settle into the trapezoidal trough 14 under the action of gravity. After the sedimentation is completed, the wastewater is initially treated. Then, the hydraulic cylinder 134 is activated to lift the baffle 133, so that the pretreated wastewater flows into the main treatment tank 12 through the water inlet 131. At this time, the solid content in the wastewater is small and the flow rate is slow, which can reduce the impact on the sludge at the bottom of the main treatment tank 12. In the main treatment tank 12, the wastewater continues to undergo sedimentation treatment and is finally purified.

Claims

1. A sedimentation tank for wastewater treatment, comprising a tank body (1), characterized in that: The pool body (1) includes a pretreatment pool (11) and a main treatment pool (12) spaced apart by a porous wall (13). The bottom of the porous wall (13) is provided with a plurality of water-permeable holes (131). The end face of the porous wall (13) near the main treatment pool (12) is slidably connected to a baffle (133) via a slide groove (132). A hydraulic cylinder (134) is fixedly installed at the top of the porous wall (13). The output end of the hydraulic cylinder (134) is fixedly connected to the baffle (133).

2. The sedimentation tank for wastewater treatment according to claim 1, characterized in that: The bottom of both the pretreatment tank (11) and the main treatment tank (12) is provided with a trapezoidal trough (14) for sludge sedimentation.

3. The sedimentation tank for wastewater treatment according to claim 1, characterized in that: Inclined plates (15) are installed at equal intervals on the wall of the trapezoidal groove (14) at the bottom of the pretreatment pool (11).

4. The sedimentation tank for wastewater treatment according to claim 1, characterized in that: The pool body (1) is symmetrically equipped with water inlet pipes (2) at its front and rear ends, and the surface of the water inlet pipes (2) is provided with water inlets (21) for introducing sewage.

5. The sedimentation tank for wastewater treatment according to claim 1, characterized in that: The upper end of the pretreatment tank (11) is fixedly installed with a water guide pipe (3), and the lower end of the water guide pipe (3) is sealed with a water distribution pipe (31). The water distribution pipe (31), the water guide pipe (3) and the water inlet pipe (2) are kept in liquid communication.

6. The sedimentation tank for wastewater treatment according to claim 5, characterized in that: The water distribution pipes (31) are arranged in multiple equidistant positions, and a water distribution pipe (31) is arranged between two adjacent inclined plates (15). The bottom of the water distribution pipe (31) extends downward and is located at the top of the trapezoidal groove (14).

7. The sedimentation tank for wastewater treatment according to claim 1, characterized in that: There are two pretreatment pools (11), which are arranged symmetrically about the main treatment pool (12).

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