Wastewater treatment device

Abstract

The utility model discloses a wastewater treatment device. The device comprises a coagulation reaction tank and a coagulation sedimentation tank which are arranged side by side, a sedimentation area is arranged in the coagulation sedimentation tank, and a sludge backflow hole is formed in a shared side wall between the coagulation reaction tank and the sedimentation area, so that at least part of sludge in the sedimentation area flows back to the coagulation reaction tank under the action of self gravity and water flow; through the arrangement, sludge formed in the settling zone can automatically flow back into the coagulation reaction tank under the action of water flow and gravity, is mixed with new wastewater and then is subjected to coagulation reaction again, so that the residual coagulant in the sludge can be fully utilized, and the concentration of the coagulant and the sludge in the coagulation reaction tank is increased; on the basis of saving resources, the coagulation effect is further improved.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically, it relates to a wastewater treatment device. Background Technology

[0002] In the wastewater treatment process, a coagulant is first added to the coagulation reaction tank. The coagulant forms flocs in the coagulation reaction tank. The flocs can adsorb suspended solids, organic matter and other harmful substances in the wastewater, or the coagulant itself has a certain adsorption effect and can directly adsorb suspended solids, organic matter and other harmful substances in the wastewater. Then the flocs or the coagulant with adsorption effect enters the sedimentation tank with the water flow, where they settle to form sludge.

[0003] During the coagulation reaction, some coagulant may not reach adsorption saturation, or the concentration of suspended solids, organic matter and other harmful pollutants in the water may be insufficient, resulting in some coagulant remaining in the water. This wastes the coagulant and prevents it from fully performing its intended function. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a wastewater treatment device that connects the coagulation reaction tank and the sedimentation zone through a sludge return hole, so that the sludge formed in the sedimentation zone can automatically return to the coagulation reaction tank under the action of water flow and gravity, mix with the new wastewater, and carry out the coagulation reaction again. This cycle is repeated to make full use of the coagulant remaining in the sludge, increase the concentration of coagulant and sludge in the coagulation reaction tank, and further increase the coagulation effect while saving resources.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a wastewater treatment device, including a coagulation reaction tank and a coagulation sedimentation tank arranged side by side.

[0007] The sedimentation tank, or coagulation sedimentation tank, has a sedimentation zone.

[0008] The coagulation reaction tank and the sedimentation zone share a common side wall with sludge return holes, which allow at least a portion of the sludge in the sedimentation zone to return to the coagulation reaction tank under its own gravity and water flow.

[0009] Furthermore, the sludge return hole is located at the bottom of the shared sidewall between the coagulation reaction tank and the sedimentation zone.

[0010] Furthermore, the shared sidewall of the coagulation reaction tank and the sedimentation zone extends vertically and downwards to the connection between the bottom wall of the coagulation reaction tank and the bottom wall of the sludge sedimentation tank.

[0011] The centerline of the sludge return hole is set perpendicular to the shared sidewall of the coagulation reaction tank and the sedimentation zone.

[0012] Furthermore, the coagulation reaction tank and the coagulation sedimentation tank are arranged side by side;

[0013] The sludge return hole is an elongated hole that extends from the front to the rear of the shared sidewall between the coagulation reaction tank and the sedimentation zone.

[0014] Furthermore, the bottom wall of the sedimentation zone gradually slopes downwards towards the sludge return hole.

[0015] Furthermore, the bottom wall of the coagulation reaction tank extends horizontally;

[0016] The angle between the bottom wall of the sedimentation zone and the extended surface of the bottom wall of the coagulation reaction tank is between 55 and 60 degrees.

[0017] Furthermore, the coagulation sedimentation tank is also equipped with a water distribution channel arranged in parallel with the sedimentation zone.

[0018] The coagulation reaction tank is connected to the sedimentation zone via a water distribution channel, so that the water mixture obtained after the coagulation reaction enters the sedimentation zone for sedimentation.

[0019] The connection point between the water distribution channel and the sedimentation zone is set higher than the sludge return hole.

[0020] Furthermore, the shared sidewall between the sedimentation zone and the water distribution channel serves as a water distribution flower wall;

[0021] The water distribution wall is equipped with several water distribution holes;

[0022] The water distribution channel is connected to the sedimentation zone through several water distribution holes;

[0023] Several water distribution holes are set higher than the sludge return holes.

[0024] Furthermore, an axial flow agitator is suspended on the top wall of the coagulation reaction tank.

[0025] Furthermore, the axial flow agitator includes an agitator shaft and agitator blades disposed on the outer periphery of the agitator shaft;

[0026] The stirring shaft extends vertically, and the stirring blades are located at the lower end of the stirring shaft;

[0027] The mixing blades are positioned above the sludge return holes.

[0028] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art.

[0029] The coagulation reactor and sedimentation zone are connected by a sludge return hole, allowing the sludge formed in the sedimentation zone to automatically return to the coagulation reactor under the action of water flow and gravity. The sludge then mixes with the new wastewater and undergoes another coagulation reaction. This cycle is repeated to fully utilize the residual coagulant in the sludge, increase the concentration of coagulant and sludge in the coagulation reactor, and further enhance the coagulation effect while saving resources.

[0030] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0031] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments, and are not intended to be general to those skilled in the art.

[0032] For technical personnel, without expending any creative effort, they can obtain their [information / capabilities] from these attached diagrams.

[0033] He attached a picture.

[0034] Figure 1 This is a schematic diagram of the wastewater treatment device provided in an embodiment of the present utility model;

[0035] Figure 2 A front view of the wastewater treatment device provided in an embodiment of this utility model;

[0036] Figure 3 for Figure 2 AA cross-section diagram;

[0037] Figure 4 for Figure 2 BB cross-section diagram;

[0038] Figure 5 The method of agitating water flow using an axial flow agitator provided in this embodiment of the utility model.

[0039] Icons: 1-Coagulation reaction tank; 1a-Bottom wall of coagulation reaction tank; 2-Coagulation sedimentation tank; 21-Water distribution channel; 22-Water distribution flower wall; 221-Water distribution hole; 23-Sedimentation zone; 23a-Bottom wall of sedimentation zone; 24-Effluent channel; 25-Effluent weir; 3-Axial flow agitator; 31-Agitator shaft; 32-Agitator blades; 4-Shared side wall of coagulation reaction tank and sedimentation zone; 5-Sludge return hole; 6-Inlet pipe; 7-Effluent pipe.

[0040] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the present invention in any way.

[0041] This invention is not intended to be outside the scope of the concept, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0043] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] like Figure 1-4 As shown, this utility model provides a wastewater treatment device, including a coagulation reaction tank 1 and a coagulation sedimentation tank 2 arranged side by side. The coagulation sedimentation tank 2 is provided with a sedimentation zone 23. The common side wall between the coagulation reaction tank 1 and the sedimentation zone 23 is provided with a sludge return hole 5, so that at least part of the sludge in the sedimentation zone 23 is returned to the coagulation reaction tank 1 under its own gravity and water flow.

[0046] In the embodiments of this utility model, through the above-mentioned settings, the sludge formed in the sedimentation zone 23 can automatically flow back to the coagulation reaction tank 1 under the action of water flow and gravity, mix with the new wastewater, and then carry out the coagulation reaction again. This cycle is repeated, which can make full use of the coagulant remaining in the sludge, increase the concentration of coagulant and sludge in the coagulation reaction tank 1, and further increase the coagulation effect while saving resources.

[0047] In the wastewater treatment process, wastewater first enters the coagulation reaction tank 1 and is thoroughly mixed with coagulant. The coagulant's role is to cause suspended solids and colloids in the wastewater to form larger particles or flocs. Subsequently, the wastewater flows into the sedimentation zone 23 of the coagulation sedimentation tank 2. Under gravity, the particles or flocs settle to the bottom of the sedimentation zone 23, forming sludge. Part of the sludge in the sedimentation zone 23, under its own gravity and the action of water flow, flows back from the sedimentation zone 23 to the coagulation reaction tank 1 through the sludge return hole 5. The returned sludge contains residual coagulant, which can further promote the coagulation reaction and improve wastewater treatment efficiency. This application reduces sludge discharge and treatment costs by recycling sludge, while also saving on the amount of coagulant used.

[0048] The coagulation reaction tank 1 and the coagulation sedimentation tank 2 are arranged side by side, occupying a small area and suitable for wastewater treatment sites with limited space. The coagulation reaction tank 1 is connected to an inlet pipe 6, which transports wastewater into the coagulation reaction tank 1 for coagulation reaction.

[0049] In an embodiment of this utility model, the sludge return hole 5 is located at the bottom of the common side wall 4 of the coagulation reaction tank and the sedimentation zone.

[0050] In this embodiment of the invention, setting the sludge return hole 5 at the bottom of the shared side wall 4 of the coagulation reaction tank and the sedimentation zone can ensure the smooth return of sludge. At the same time, it can reduce interference with the coagulation reaction and sedimentation process, and ensure the normal operation of these two processes.

[0051] Furthermore, the shared sidewall 4 of the coagulation reaction tank and the sedimentation zone extends vertically and downwards to the connection between the bottom wall 1a of the coagulation reaction tank and the bottom wall of the sludge sedimentation tank.

[0052] The centerline of the sludge return hole 5 is perpendicular to the shared sidewall 4 of the coagulation reaction tank and the sedimentation zone.

[0053] The shared sidewall extends vertically upwards and downwards, ensuring that it can effectively separate the coagulation reaction tank 1 and the sedimentation zone 23, while allowing sludge to be returned in the appropriate location;

[0054] The common sidewall extends downward to the connection point between the bottom wall 1a of the coagulation reaction tank and the bottom wall of the sludge settling tank, so that the common sidewall can connect to both the bottom wall 1a of the coagulation reaction tank and the bottom wall of the sludge settling tank at the same time. This design not only enhances the stability of the structure, but also ensures that the sludge can flow smoothly back from the settling zone 23 to the coagulation reaction tank 1, preventing the sludge backflow from being obstructed.

[0055] The axis of the sludge return hole 5 is set perpendicular to the common sidewall 4 of the coagulation reaction tank and the sedimentation zone. This design allows the sludge to pass through the common sidewall directly and efficiently during return, without generating additional resistance or poor return due to the angle of the sludge return hole 5.

[0056] Furthermore, the coagulation reaction tank 1 and the coagulation sedimentation tank 2 are arranged side by side;

[0057] The sludge return hole 5 is an elongated hole that extends from the front side to the rear side of the shared sidewall 4 of the coagulation reaction tank and the sedimentation zone.

[0058] The coagulation reaction tank 1 and the coagulation sedimentation tank 2 are arranged side by side in the horizontal direction. This layout is compact and reasonable, which helps to save floor space and facilitates the installation, maintenance and operation of the equipment.

[0059] The sludge return hole 5 is designed in a long strip shape, which has the advantage of providing a larger return area, allowing more sludge to flow back smoothly to the coagulation reaction tank 1 under the action of gravity and water flow; the long strip shape helps to reduce the risk of blockage during the return process, because even if part of the long strip hole is blocked by sludge, the remaining part can still remain unobstructed.

[0060] The sludge return hole 5 extends from the front to the rear of the shared sidewall 4 between the coagulation reaction tank and the sedimentation zone. This design ensures that sludge can be returned along the entire length of the shared sidewall in the front-to-back direction.

[0061] This step improves the uniformity and efficiency of the reflux. Simultaneously, it allows the sludge in the sedimentation zone 23 to mix more thoroughly with the wastewater in the coagulation reactor 1, thereby improving the wastewater treatment effect.

[0062] In addition, the size of the sludge return hole 5 extending from top to bottom is 20-30mm. In order to reduce the hydraulic impact of the hydraulic disturbance of the coagulation reaction tank 1 on the sedimentation zone 23, the size of the sludge return hole 5 extending from top to bottom should not be too large.

[0063] In an embodiment of this utility model, the bottom wall 23a of the sedimentation zone extends gradually downwards towards the sludge return hole 5.

[0064] In the embodiments of this utility model, the inclined design of the bottom wall 23a of the sedimentation zone can more effectively guide the sludge into the return hole, so that the sludge can flow more naturally to the sludge return hole 5 under the action of gravity. This can reduce the accumulation of sludge at the bottom of the sedimentation zone 23, avoid the problem of blockage or poor return caused by sludge accumulation, thereby improving the efficiency of sludge return and allowing more sludge to be returned to the coagulation reaction tank 1 in a timely and effective manner.

[0065] The bottom wall 23a of the sedimentation zone gradually slopes downwards towards the sludge return hole 5, forming a sludge collection hopper at the bottom of the sedimentation zone 23. The sludge formed after sedimentation is concentrated in the sludge collection hopper. At least part of the sludge in the sludge collection hopper is returned to the coagulation reaction tank 1, and the remaining sludge is discharged to the outside through pumps, sewage pipes and other devices.

[0066] Furthermore, the bottom wall 1a of the coagulation reaction tank extends horizontally;

[0067] The angle between the bottom wall 23a of the sedimentation zone and the extended surface of the bottom wall of the coagulation reaction tank 1 is between 55 and 60 degrees.

[0068] The bottom wall 1a of the coagulation reaction tank is designed to extend horizontally. This design helps ensure that wastewater is evenly distributed within the coagulation reaction tank 1, which is beneficial for the thorough mixing and reaction of the coagulant with the pollutants in the wastewater. The horizontally extended bottom wall also reduces problems such as uneven wastewater flow or dead zones caused by terrain or equipment layout.

[0069] The angle between the bottom wall 23a of the sedimentation zone and the extended surface of the bottom wall of the coagulation reactor 1 is set between 55 and 60 degrees. This angle range was carefully chosen to balance the efficiency of sludge return and the sedimentation effect. The angle design allows the sludge at the bottom of the sedimentation zone 23 to flow more smoothly to the sludge return hole 5. Within the 55-60 degree angle range, the flow path of the sludge under gravity is optimized, reducing the risk of accumulation and blockage. Although the inclined bottom wall facilitates sludge return, an excessively large angle may affect the sedimentation effect of the sedimentation zone 23. The 55-60 degree angle range ensures smooth sludge return while maintaining a sufficient sedimentation zone 23 area to ensure that suspended solids in the wastewater can be effectively settled.

[0070] In an embodiment of this utility model, the coagulation sedimentation tank 2 is also provided with a water distribution channel 21 arranged in parallel with the sedimentation zone 23 before and after it;

[0071] The coagulation reaction tank 1 is connected to the sedimentation zone 23 via the water distribution channel 21, so that the water mixture obtained after the coagulation reaction enters the sedimentation zone 23 for sedimentation.

[0072] The connection point between the water distribution channel 21 and the sedimentation zone 23 is set higher than the sludge return hole 5.

[0073] In an embodiment of this utility model, the water distribution channel 21 can ensure that the water mixture after coagulation reaction can smoothly enter the sedimentation zone 23;

[0074] Coagulation is an important step in the water treatment process, which usually involves the addition of coagulants to form flocs, which will settle down during the subsequent sedimentation process.

[0075] When the water mixture after coagulation reaction enters the sedimentation zone 23, the heavier flocs will gradually settle to the bottom of the pool under the action of gravity, forming sludge; the clear water after sedimentation will float to the surface and enter the outlet channel 24 through the outlet weir 25, and be discharged through the outlet pipe 7.

[0076] The connection between the water distribution channel 21 and the sedimentation zone 23 is designed to be higher than the sludge return hole 5. This serves two purposes: first, to prevent sludge at the bottom of the sedimentation zone 23 from flowing back to the coagulation reaction tank 1 through the water distribution channel 21, so that the sludge can flow back to the sedimentation zone 23 under the action of water flow; and second, to ensure that only the water mixture after coagulation reaction can enter the sedimentation zone 23.

[0077] Specifically, the shared sidewall between the sedimentation zone 23 and the water distribution channel 21 serves as the water distribution flower wall 22;

[0078] The water distribution flower wall 22 is provided with several water distribution holes 221;

[0079] Water distribution channel 21 is connected to sedimentation zone 23 through several water distribution holes 221;

[0080] Several water distribution holes 221 are set higher than the sludge return holes 5.

[0081] The water distribution wall 22 not only serves as a separator between the two areas, but also functions to evenly distribute the water mixture in the water distribution channel 21 to the sedimentation zone 23.

[0082] The function of the several water distribution holes 221 on the water distribution wall 22 is to allow the water mixture in the water distribution channel 21 to flow into the sedimentation zone 23 through them. By rationally designing the number, size, and distribution of the water distribution holes 221, it can be ensured that the water mixture is evenly distributed in the sedimentation zone 23, thereby improving the sedimentation efficiency. When the water mixture in the water distribution channel 21 flows through the water distribution wall 22, it will flow evenly into the sedimentation zone 23 through the water distribution holes 221.

[0083] All water distribution holes 221 are positioned higher than the sludge return holes 5. This design prevents sludge at the bottom of the sedimentation zone 23 from flowing back into the water distribution channel 21 through the water distribution holes 221. At the same time, it also ensures that only the water mixture after coagulation reaction can enter the sedimentation zone 23 through the water distribution holes 221.

[0084] In an embodiment of this utility model, an axial flow agitator 3 is suspended on the top wall of the coagulation reaction tank 1.

[0085] In this embodiment of the invention, the agitator in the coagulation reaction tank 1 is an axial flow agitator, which allows the water to flow upward from the periphery to the center, ensuring that the sludge from the sedimentation tank can smoothly enter the coagulation reaction tank 1 from the sludge return hole 5 with the water flow; for example Figure 5 The method of agitating water flow by the axial flow agitator 3 is shown, that is, the water flow rises from the periphery to the center;

[0086] Specifically, the axial flow agitator 3 includes an agitator shaft 31 and agitator blades 32 disposed on the outer periphery of the agitator shaft 31;

[0087] The stirring shaft 31 extends vertically, and the stirring blades 32 are located at the lower end of the stirring shaft 31;

[0088] The stirring blades 32 are positioned higher than the sludge return hole 5.

[0089] The stirring shaft 31 is the core component of the agitator, responsible for providing rotational power so that the stirring blades 32 can rotate and stir the surrounding fluid. The vertically extending stirring shaft 31 helps ensure that the stirring blades 32 can cover a wider area of ​​fluid, thereby improving stirring efficiency.

[0090] The stirring blade 32 is located at the lower end of the stirring shaft 31. This design allows the stirring blade 32 to act directly on the bottom of the fluid, which helps to break up the sediment at the bottom of the fluid and promotes uniform mixing of the fluid.

[0091] The stirring blades 32 are set higher than the sludge return hole 5, so that the water flows upward from the periphery to the center, while ensuring that the sludge in the sedimentation tank can smoothly enter the coagulation reaction tank 1 from the sludge return hole 5 with the water flow.

[0092] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A wastewater treatment device, comprising a coagulation reaction tank and a coagulation sedimentation tank arranged side by side, wherein the coagulation sedimentation tank is provided with a sedimentation zone, characterized in that, The coagulation reaction tank and the sedimentation zone share a common side wall with sludge return holes, which allow at least a portion of the sludge in the sedimentation zone to return to the coagulation reaction tank under its own gravity and water flow.

2. The wastewater treatment device according to claim 1, characterized in that, The sludge return hole is located at the bottom of the shared side wall of the coagulation reaction tank and the sedimentation zone.

3. The wastewater treatment device according to claim 2, characterized in that, The shared sidewall of the coagulation reaction tank and the sedimentation zone extends vertically and downwards to the junction of the bottom wall of the coagulation reaction tank and the bottom wall of the sludge sedimentation tank. The centerline of the sludge return hole is set perpendicular to the shared sidewall of the coagulation reaction tank and the sedimentation zone.

4. The wastewater treatment device according to claim 3, characterized in that, The coagulation reaction tank and the coagulation sedimentation tank are arranged side by side; The sludge return hole is an elongated hole that extends from the front side to the rear side of the shared sidewall between the coagulation reaction tank and the sedimentation zone.

5. The wastewater treatment apparatus according to any one of claims 1-4, characterized in that, The bottom wall of the sedimentation zone gradually slopes downwards towards the sludge return hole.

6. The wastewater treatment apparatus according to claim 5, characterized in that, The bottom wall of the coagulation reaction tank extends horizontally; The angle between the bottom wall of the sedimentation zone and the extended surface of the bottom wall of the coagulation reaction tank is between 55 and 60 degrees.

7. The wastewater treatment apparatus according to claim 5, characterized in that, The coagulation sedimentation tank is also equipped with a water distribution channel arranged in parallel with the sedimentation zone. The coagulation reaction tank is connected to the sedimentation zone via a water distribution channel, so that the water mixture obtained after the coagulation reaction enters the sedimentation zone for sedimentation. The connection point between the water distribution channel and the sedimentation zone is set higher than the sludge return hole.

8. The wastewater treatment apparatus according to claim 7, characterized in that, The shared sidewall between the sedimentation zone and the water distribution channel serves as a water distribution flower wall; The water distribution wall is equipped with several water distribution holes; The water distribution channel is connected to the sedimentation zone through several water distribution holes; Several water distribution holes are set higher than the sludge return holes.

9. The wastewater treatment apparatus according to claim 5, characterized in that, An axial flow agitator is suspended on the top wall of the coagulation reaction tank.

10. The wastewater treatment apparatus according to claim 9, characterized in that, An axial flow agitator includes an agitator shaft and agitator blades disposed on the outer periphery of the agitator shaft; The stirring shaft extends vertically, and the stirring blades are located at the lower end of the stirring shaft; The mixing blades are positioned above the sludge return holes.

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