Efficient mixing and uniform water distribution device for sedimentation tank
By designing a baffle mixing tank and a uniform water distribution tank, the problems of uneven mixing and water distribution of the reagents were solved, achieving efficient reaction and improved sedimentation of the reagents, while reducing equipment maintenance and operating costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-03-06
AI Technical Summary
Existing water treatment processes require power equipment when mixing chemicals, which leads to complex maintenance and reduced chemical efficacy. At the same time, uneven water distribution results in a decrease in sedimentation effect.
Design a device that includes a baffle mixing tank and a uniform water distribution tank, which uses the water flow itself to mix the reagents and achieves uniform water distribution through gradually changing overflow holes, thereby reducing reagent loss and sedimentation disturbance.
It improves the reaction effect of the reagents, reduces reagent consumption, enhances the precipitation effect, and reduces equipment maintenance costs and operating expenses.
Smart Images
Figure CN223969801U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wastewater treatment technology, specifically a high-efficiency mixing and uniform water distribution device for sedimentation tanks. Background Technology
[0002] Coagulation and sedimentation are key steps in water treatment processes. After chemical coagulation, raw water forms dense flocs. In subsequent processes, these flocs separate from the water through gravity and flotation, reducing suspended solids in the effluent. The combined process of coagulant and flocculant is widely used in large and medium-sized water plants in my country. The coagulant used in the reaction primarily destabilizes and initially aggregates colloidal particles through double-layer compression, adsorption neutralization, and adsorption bridging. The flocculant, on the other hand, further aggregates the initially agglomerated small particles into larger flocs through adsorption bridging and netting (partial flocculant action), facilitating subsequent sedimentation or filtration separation processes.
[0003] Current water treatment processes often employ pump mixing or mechanical mixing when adding chemicals. Both methods require moving parts to drive the water flow, making equipment maintenance and management relatively complex and resulting in higher operating costs. Furthermore, due to the specific properties of flocculants, these moving parts may break up flocs, reducing efficacy and increasing chemical consumption. Additionally, after the reaction, the water that needs to settle enters a horizontal flow sedimentation tank. If the water flow into the horizontal flow sedimentation tank is uneven, the water flow can easily impact the sludge particles during sedimentation, creating secondary disturbance and reducing the sedimentation effect of the sedimentation tank. Utility Model Content
[0004] In view of the problems of existing water treatment processes in terms of mixing agents and the need for subsequent water distribution, as mentioned in the background art, this utility model provides a highly efficient mixing and uniform water distribution device for sedimentation tanks.
[0005] This utility model provides the following technical solution to achieve the above objectives:
[0006] A high-efficiency mixing and uniform water distribution device for sedimentation tanks includes a tank body. The inner wall of the tank body is connected to the head end of an intermediate baffle. One side of the intermediate baffle and the tank body form a baffle mixing tank, and the other side of the intermediate baffle and the tank body form a uniform water distribution tank. A water channel is provided between the tail end of the intermediate baffle and the inner wall of the opposite side of the tank body. In the baffle mixing tank, baffles are alternately arranged on the inner wall of the tank body and the intermediate baffle, and a water-chemical inlet is provided on the side away from the water channel. A water-passing plate is provided between the water-chemical inlet and an adjacent baffle. The uniform water distribution tank includes a water distribution wall, and a set of overflow holes are spaced apart along the horizontal direction of the water distribution wall. The opening size of the overflow holes increases from the tail end to the head end of the intermediate baffle.
[0007] In the aforementioned high-efficiency mixing and uniform water distribution device for sedimentation tanks, the tank body is rectangular in shape.
[0008] In the aforementioned high-efficiency mixing and uniform water distribution device for sedimentation tanks, the height of the water-passing plate and the baffle is lower than the height of the intermediate baffle.
[0009] In the aforementioned high-efficiency mixing and uniform water distribution device for sedimentation tanks, the baffles are evenly distributed on both side walls.
[0010] In the aforementioned high-efficiency mixing and uniform water distribution device for sedimentation tanks, the length of the baffle is greater than 1 / 2 of the width of the baffle mixing tank, and the last baffle near the end of the baffle mixing tank is connected to the intermediate baffle.
[0011] In the aforementioned high-efficiency mixing and uniform water distribution device for sedimentation tanks, a corner baffle is provided on the inner wall of the tank and at the corner where the water channel and the water distribution wall meet.
[0012] In the aforementioned high-efficiency mixing and uniform water distribution device for sedimentation tanks, the tank body is equipped with several hooks.
[0013] In the aforementioned high-efficiency mixing and uniform water distribution device for sedimentation tanks, the overflow hole is rectangular.
[0014] In the aforementioned high-efficiency mixing and uniform water distribution device for sedimentation tanks, a guide plate is fixedly provided at the bottom of the outer side of the water distribution wall.
[0015] Compared with the prior art, the efficient mixing and uniform water distribution device for sedimentation tanks provided by this utility model has the following beneficial effects:
[0016] In this invention, by setting up a baffle mixing tank and a uniform water distribution tank, the water body itself flows and mixes fully with the chemicals, which improves the reaction effect of flocculants and coagulants on sewage and reduces chemical loss. In addition, in this invention, the size of the overflow hole opening on the water distribution wall is gradually set according to the water flow velocity, which can achieve the effect of uniform water distribution. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model;
[0018] Attached diagram labels: 1-Intermediate baffle; 2-Water inlet; 3-Baffle; 4-Corner baffle; 5-Water distribution wall; 6-Overflow hole; 7-Guide plate; 8-Hook; 9-Tank body; 10-Water channel; 11-Water flow plate. Detailed Implementation
[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0020] Example. A high-efficiency mixing and uniform water distribution device for a sedimentation tank, structural reference. Figure 1 As shown, the system includes a tank 9, the inner wall of which is connected to the head end of an intermediate baffle 1. One side of the intermediate baffle 1 and the tank 9 form a baffle mixing tank, and the other side of the intermediate baffle 1 and the tank 9 form a uniform water distribution pool. A water channel 10 is provided between the tail end of the intermediate baffle 1 and the inner wall of the opposite side of the tank 9. In the baffle mixing tank, baffles 3 are staggered on the inner wall of the tank 9 and the intermediate baffle 1, and a water inlet 2 is provided on the side away from the water channel 10. A water-passing plate 11 is provided between the water inlet 2 and an adjacent baffle 3. The uniform water distribution pool includes a water distribution wall 5, and a set of overflow holes 6 are spaced apart along the horizontal direction of the water distribution wall 5. The opening size of the overflow holes 6 increases from the tail end to the head end of the intermediate baffle 1.
[0021] The structure of the water channel 10 is the gap between the tail end of the intermediate baffle 1 and the inner wall of the opposite tank 9. This structure connects the baffle mixing tank and the uniform water distribution tank, so that the water in the baffle mixing tank can enter the uniform water distribution tank through the water channel 10.
[0022] The structure of the water-chemical inlet 2 includes a water inlet as shown in the figure and multiple chemical dosing ports, which are used to add the water to be treated and the chemicals (such as flocculants and coagulants) to the baffled mixing tank. Furthermore, the water inlet can be connected to a water pipe with a valve for convenient water addition and the flow rate within the device can be adjusted as needed; the chemical dosing ports are connected to a chemical tank with a discharge valve for convenient, timed, and rhythmic addition of appropriate proportions of chemicals to treat wastewater.
[0023] The groove 9 is rectangular in shape. (Reference) Figure 1 The design of the tank 9 in this shape makes the device structure easier to lay out, and one side wall of the tank 9 can be directly used as a water distribution wall 5; and the device is also more convenient to use.
[0024] The height of the water-passing plate 11 and the baffle plate 3 is lower than the height of the intermediate baffle plate 1 to prevent water that has not passed through the baffle mixing tank in an orderly manner from passing over the intermediate baffle plate 1. The water-passing plate 11 serves as a buffer and water-passing device. After passing through the water-passing plate 11, the mixed liquid flows around between the baffle plates 3.
[0025] The baffles 3 are evenly distributed on both side walls. The length of each baffle 3 is greater than half the width of the mixing tank, and the last baffle 3 near the end of the mixing tank is connected to the middle baffle 1. With this configuration, the water and chemicals added to the device can flow around the baffles 3 and be effectively mixed during the flow.
[0026] A corner baffle 4 is provided on the inner wall of the tank 9 at the corner where the water channel 10 and the water distribution wall 5 meet. The corner baffle 4 buffers and guides the water passing through the baffle mixing tank and the water channel 10, so that the incoming water flows more evenly in the uniform water distribution tank.
[0027] The overflow hole 6 is rectangular in shape. Furthermore, the size of the overflow hole 6 increases progressively from the tail end to the head end of the intermediate baffle 1. This design takes into account the characteristic that the water flow velocity gradually decreases as it flows from the tail end to the head end of the intermediate baffle 1. By gradually increasing the size of the overflow hole 6 along the water flow direction on the water distribution wall 5, a uniform water distribution is achieved by making the outlet smaller as the flow velocity increases.
[0028] A guide plate 7 is fixedly installed at the bottom outer side of the water distribution wall 5. The guide plate 7 is arc-shaped and has a 10mm gap with the water distribution wall 5. In this way, when the water flows into the sedimentation tank through the overflow hole 6, the guide plate 7 blocks the outflowing water. After the water flows over the guide plate 7, it enters the sedimentation tank along the guide plate 7, reducing the impact of the water flow on the sediment in the sedimentation tank.
[0029] The tank body 9 is equipped with several hooks 8. It can be easily installed and removed from the sedimentation tank by being suspended by four hooks 7.
[0030] Furthermore, the entire structure of this device is made of stainless steel, and the components are welded together, making the device both low-cost and durable.
[0031] Working Principle: This device is used in a horizontal flow sedimentation tank. Wastewater and chemicals are first mixed and distributed through this device before entering the sedimentation tank. Specifically, the sedimentation tank is first suspended by hooks 8, and then wastewater is introduced through the water-chemical inlet 2. Simultaneously, appropriate amounts of flocculant and coagulant required for the wastewater treatment reaction are added. After the mixed water reaches a certain height, it passes over the top of the overflow plate 11 and then flows around the baffles 3. During this process, the wastewater and chemicals are mixed through the fluid's movement over the top of the overflow plate 11 and flowing around the baffles 3. Different flow rates are required during the action of the flocculant and coagulant. The flow rate varies from fast (mixing PAC) to slow (PAC fully coagulates) to fast (mixing PAM) to medium (providing opportunities for small floc collisions) to slow (floc growth). Within the baffle mixing tank, the water and chemicals achieve thorough mixing, providing sufficient reaction time and space for the reactants and maximizing the reaction effect. After the mixed liquid has fully reacted in the baffle mixing tank, it enters the uniform water distribution tank through the water channel 10 at the notch of the intermediate baffle 1. At this time, the corner baffle of the water distribution tank buffers and guides the turbulent water flow. Since the water flowing into the water distribution tank has a high velocity and flow rate, the openings of the overflow holes 6 are arranged to gradually increase in size from near to far to achieve the effect of uniform water distribution. After the water flows out of the overflow holes 6, it is guided by the guide plate 7 into the sedimentation tank. The function of the guide plate 7 is to change the direction of water flow, preventing the incoming water from falling directly into the sedimentation tank; and the water gains forward velocity, which can reduce secondary disturbance to the sediment that has settled to the bottom of the tank by gravity.
[0032] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.
Claims
1. A high efficiency mixing and uniform water distribution device for a sedimentation basin characterized by: The utility model relates to a water distribution device, including groove (9), the inner wall of groove (9) connects the head end of intermediate baffle (1), and the one side of intermediate baffle (1) and the groove (9) between constitute the baffle mixing groove, the other side with groove (9) constitute the uniform water distribution pool, and the tail end of intermediate baffle (1) and the inner wall between opposite groove (9) are equipped with water body passageway (10), the baffle mixing groove in, and the inner wall of groove (9) and intermediate baffle (1) are staggered and provided with baffle (3) on, and are equipped with water medicine inlet (2) on the side away from water body passageway (10), and water medicine inlet (2) and adjacent baffle (3) between setting are equipped with water plate (11), the uniform water distribution pool includes water distribution wall (5), and is equipped with a group of overflow holes (6) in the horizontal direction of water distribution wall (5) and is spaced apart, and according to from the tail end of intermediate baffle (1) to the head end direction, the size of the opening of overflow hole (6) is incrementally set.
2. A high efficiency mixing and uniform distribution device for sedimentation tanks as claimed in claim 1, wherein: The shape of the groove (9) is rectangular.
3. A high efficiency mixing and uniform distribution device for sedimentation basins as claimed in claim 1, wherein: The setting height of the water plate (11) and the baffle (3) is lower than the height of the intermediate baffle (1).
4. A high efficiency mixing and uniform distribution device for sedimentation basins according to claim 1, characterized in that: The baffles (3) are arranged at equal intervals.
5. A high efficiency mixing and uniform distribution device for sedimentation basins according to claim 1, characterized in that: The length of the baffle (3) is greater than 1 / 2 of the width of the baffle mixing groove, and the last baffle (3) near the end of the baffle mixing groove is connected to the intermediate baffle (1).
6. A high efficiency mixing and uniform distribution device for sedimentation basins according to claim 1, characterized in that: The corner baffle (4) is arranged on the inner wall of the groove (9) and at the corner between the water body passageway (10) and the water distribution wall (5).
7. A high efficiency mixing and uniform distribution device for sedimentation basins according to claim 1 characterized in that: The groove (9) is provided with a plurality of hooks (8).
8. A high efficiency mixing and uniform distribution device for sedimentation basins according to claim 1, characterized in that: The shape of the overflow hole (6) is rectangular.
9. A high efficiency mixing and uniform distribution device for sedimentation basins according to claim 1 characterized in that: The water distribution wall (5) is provided with a guide plate (7) at the bottom of the outer side.