Simple and efficient sedimentation tank

Abstract

The utility model discloses a simple efficient sedimentation tank, which comprises an inclined sedimentation promoting structure and a water distribution pipe, the water distribution pipe is positioned on the back side of the sedimentation promoting structure and close to the upper part of the sedimentation promoting structure, and the water distribution pipe is provided with water distribution holes. The triangular area on the back side of the sedimentation promoting structure is fully utilized, the space utilization efficiency of the sedimentation tank is improved, and meanwhile the problems that water flow in the area is relatively still and cannot be treated in time, and the water quality treatment effect is affected are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of water treatment equipment, specifically relates to a simple and efficient sedimentation tank. BACKGROUND

[0002] The inclined plate sedimentation is a kind of sedimentation equipment, and is widely used due to high sedimentation efficiency, small space occupation and the like.The applicant finds in research that the water distribution area in the existing inclined plate sedimentation tank is basically lower than the height of inclined plate in height direction, such as the patent with application No. "201610796853.X", and the name "a high-efficiency upflow type inclined plate sedimentation tank of different flow direction", this structure directly leads to the formation of dead water area in the triangular area of the back side of inclined plate, and the sewage in this area cannot be well precipitated, relatively, the effective working space of the sedimentation tank is reduced, which invisibly affects the working efficiency of the sedimentation tank. CONTENT OF UTILITY MODEL

[0003] Therefore, the utility model provides a simple and efficient sedimentation tank to solve the problem of low space utilization rate in the sedimentation tank and low water treatment efficiency in the prior art.

[0004] The technical scheme is as follows:

[0005] A simple and efficient sedimentation tank, comprising an inclined setting promoting sedimentation structure and a water distribution pipe, and the key is that the water distribution pipe is located at the back side of the promoting sedimentation structure and close to the upper part of the promoting sedimentation structure, and the water distribution pipe is provided with water distribution holes.

[0006] The above scheme makes full use of the triangular area at the back side of the promoting sedimentation structure, improves the utilization efficiency of the space of the sedimentation tank, and avoids the problem that the water flow in the area is relatively stationary and cannot be treated in time, thereby affecting the water quality treatment effect.

[0007] As a preferred embodiment, the water distribution holes are upward. The above scheme can slow down the disturbance of water flow, that is, avoid or alleviate the influence of initial speed on the normal settling motion of the separation zone.

[0008] As a preferred embodiment, the water distribution pipe is arranged along the length direction of the promoting sedimentation structure, and the water distribution holes are uniformly arranged along the length direction of the water distribution pipe. The above scheme can further ensure the uniformity and stability of water distribution and reduce flow interference.

[0009] As a preferred embodiment, the sedimentation tank has a coagulation mixing area, and the sedimentation tank has a water inlet communicated with the upper part of the coagulation mixing area. The above scheme can add coagulant to the coagulation mixing area, so that the solid suspended matter in the sewage can be more easily coagulated.

[0010] As preferred: the sedimentation tank has a flocculation mixing zone penetrating the coagulation mixing zone, and the flocculation mixing zone is communicated with the water distribution pipe through an inter-zone communication pipe. With the above scheme, flocculants can be added to the flocculation mixing zone during water treatment to make particulate matter into flocculation bodies, which are relatively easier to separate subsequently.

[0011] As preferred: the coagulation mixing zone and / or the flocculation mixing zone is provided with an air agitator. With the above scheme, the coagulation and flocculation efficiency can be improved.

[0012] As preferred: the flocculation mixing zone is provided with a sludge concentration meter. With the above scheme, real-time monitoring of sludge concentration can be realized to achieve automatic control.

[0013] As preferred: the bottom of the sedimentation structure has a vertically downward extending flow guide structure, the back side of the flow guide structure is a coagulation zone, and the front side is a separation zone. With the above scheme, the relatively independent coagulation zone can further reduce water distribution interference and improve the separation efficiency of the sedimentation structure.

[0014] As preferred: the bottom of the sedimentation tank is provided with at least one strip-shaped hopper, and a sludge collection pipe is arranged near the bottom of the hopper, and the sludge collection pipe has a sludge collection hole with an upward opening. The strip-shaped hopper can reduce the height limitation problem of the conventional sedimentation tank and further improve the space utilization efficiency of the sedimentation tank.

[0015] As preferred: the outer end of the sludge collection pipe is connected with a gas lifting pipe, the end of the gas lifting pipe away from the sludge collection pipe is communicated with the coagulation mixing zone, the gas lifting pipe is connected with an aeration pipe, and the aeration pipe is provided with a gas lifting control valve. With the above scheme, the sludge can be returned to the mixer by gas lifting to repeat the mixing, flocculation, coagulation, and separation steps, which is beneficial to improve the treatment quality. Meanwhile, the multiple gas lifting control valves can be actuated by PLC to realize stable and controllable sludge return and avoid sludge accumulation in the hopper.

[0016] As preferred: the sedimentation tank is provided with an overflow pipe, the overflow pipe has overflow holes distributed along the length direction of the overflow pipe, and the clear water pipe is located above the sedimentation structure.

[0017] The sedimentation tank is provided with an overflow pipe opening corresponding to the overflow pipe, and the overflow pipe and the overflow pipe opening are rotatably connected. With the above scheme, the rotatable overflow pipe has a certain adjustment space in the height direction of the overflow holes, which can realize certain liquid level and balance correction purposes, and is beneficial to further improve the process operation stability and efficiency.

[0018] Compared with the prior art, the utility model has the advantages of:

[0019] The simple and efficient sedimentation tank has the advantages that the utilization ratio of the internal space of the sedimentation tank is relatively improved by reasonably arranging the water distribution pipe and the strip-shaped mud bucket, and the water treatment efficiency and quality can be further improved in combination with the air stripping process. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a plane schematic view of the utility model;

[0021] Figure 2 It is an internal structure schematic view of the utility model;

[0022] Figure 3 It is a side schematic view of the utility model. DETAILED DESCRIPTION

[0023] The utility model will be further explained in detail in combination with the drawings.

[0024] Reference Figures 1 to 3 The simple and efficient sedimentation tank mainly includes a sedimentation tank main body in a closed structure, as shown in the figure, the sedimentation tank main body is internally provided with a sinking promoting structure 10 and a water distribution pipe 6, the water distribution pipe 6 is provided with water distribution holes 60, one of the keys of the application lies in that the water distribution pipe 6 is located at the triangular area on the back side of the sinking promoting structure 10 and is close to the upper part of the sinking promoting structure 10, the sinking promoting structure 10 in the application is a common inclined plate or / and inclined pipe, which will not be repeated here.

[0025] In the specific implementation, the water distribution holes 60 are upward, i.e. Figure 2 Z direction in the figure, and the water distribution pipe 6 is arranged along the length direction of the sinking promoting structure 10, i.e. Figure 1 Y direction in the figure, the water distribution holes 60 are evenly arranged along the length direction of the water distribution pipe 6,

[0026] In order to further improve the internal space utilization efficiency of the sedimentation tank, the sedimentation tank is internally provided with a relatively independent coagulation mixing area A, the sedimentation tank main body is provided with a water inlet 1 at a position close to the upper part of the coagulation mixing area A, and the water inlet 1 is in communication with the coagulation mixing area A, when working, the sewage to be treated can enter the coagulation mixing area A through the water inlet 1.

[0027] At the same time, the sedimentation tank is internally provided with a flocculation mixing area B in communication with the coagulation mixing area A, the flocculation mixing area B is in communication with the water distribution pipe 6 through an interval communication pipe 5, and the interval communication pipe 5 is in communication with the flocculation mixing area B at a position close to the upper part of the flocculation mixing area B but lower than the water inlet 1.

[0028] The coagulation mixing area A and / or the flocculation mixing area B is internally provided with an air agitator 2. In the embodiment, the air agitators 2 are installed in the coagulation mixing area A and the flocculation mixing area B, which are mainly used for accelerating coagulation and flocculation and improving the treatment efficiency, in addition, the sludge concentration meter 4 is arranged in the flocculation mixing area B, which can monitor the sludge concentration in real time and facilitate automatic control of discharging sludge.

[0029] As Figure 2 shown, the bottom of the sinking structure 10 has a vertically downward extending flow guide structure 7, the back side of the flow guide structure 7 is the condensation area C, and the front side is the separation area D. In actual implementation, the flow guide structure 7 is a plate-shaped structure, which can also be integrally formed with the inclined plate. Figure 2 The middle blue arrow represents the fluid flow direction, and the gray arrow represents the sludge sedimentation direction. The fluid entering the condensation area C from the water distribution pipe 6 can only move downward to the bottom of the separation area D under the guidance of the flow guide structure 7. The liquid level in the separation area D rises, and efficient separation is completed under the action of the sinking structure 10, that is, the sludge sinks, and the upper part is mainly clean water.

[0030] In order to facilitate the quick cleaning of the sludge in the sedimentation tank, at least one strip-shaped hopper 9 is arranged at the bottom of the sedimentation tank, and a sludge collection pipe 8 is arranged at a position close to the bottom of the hopper 9. The sludge collection pipe 8 has a sludge collection hole with an upward opening. For details, please refer to Figure 1 and Figure 2 It should be noted that, for the convenience of understanding, Figure 2 the internal structure is represented by a local perspective view. In the figure, the two hoppers 9 are in cross section, and the sinking structure 10 and the flow guide structure 7 above are in perspective view. In the actual structure, the length direction of the hopper 9 is parallel to the length direction of the sinking structure 10, that is, they are both arranged along the Y direction. The flow guide structure 7 is vertically arranged, and its lower part is close to the middle position of the most lateral hopper 9. In this way, most of the hopper receiving area corresponds to the separation area D.

[0031] The sludge collection pipe 8 is arranged along the length direction of the hopper 9 (Y direction), and its outer end penetrates through the side wall of the sedimentation tank and is connected with the air-lift pipe 12. As shown in Figure 1 and Figure 3 , the air-lift pipe 12 is connected with the coagulation mixing area A at the end far from the sludge collection pipe 8. The air-lift pipe 12 is connected with the air charging pipe 13, and the air charging pipe 13 is provided with an air-lift control valve 14. In this way, the deposited sludge in the hopper 9 can be returned to the coagulation mixing area A by air-lift, and can be subjected to secondary coagulation and flocculation treatment.

[0032] Under normal circumstances, the outer end of the sludge collection pipe 8 is connected with the air-lift pipe 12 through a three-way valve, and the other port of the three-way valve is connected with the sludge discharge pipe 16. The sludge discharge pipe 16 is provided with a discharge valve 17.

[0033] In addition, the sedimentation tank is provided with an overflow pipe 11. As shown in Figure 1 and Figure 2 , the overflow pipe 11 is provided with overflow holes 110 distributed along its length direction. The overflow pipe 11 is located above the sinking structure 10. In this way, the clean water after the settlement treatment can be discharged through the overflow pipe 11.

[0034] In order to further improve the liquid level adaptation function of the overflow pipe 11, the overflow pipe 11 has a certain height function, specifically, the overflow pipe 11 is provided with an overflow pipe opening 15 corresponding to the overflow pipe 11 on the sedimentation tank, and the overflow pipe 11 is rotatably connected with the overflow pipe opening 15, so that the actual height position of the overflow hole 110 can be adjusted by rotating the overflow pipe 11.

[0035] Reference Figures 1 to 3 The simple and efficient sedimentation tank shown, in specific implementation, the air agitator 2, the sludge concentration meter 4, the air stripping control valve 14, and the discharge valve 17 are all controlled by PLC.

[0036] The sewage to be treated enters the coagulation mixing area A through the water inlet 1, and after adding a coagulant into the coagulation mixing area A, the sewage is mixed by the corresponding air agitator 2, and then enters the flocculation mixing area B through the through hole at the bottom, and a corresponding flocculating agent is added, and then mixed by the corresponding air agitator 2, and in specific implementation, the bottom of the flocculation mixing area B can also be provided with a corresponding sludge discharge port for discharging flocculation, and the flocculation treated water in the flocculation mixing area B enters the water distribution pipe 6 through the interval communication pipe 5, and completes water distribution in the coagulation area C through the water distribution hole 60, and because the water distribution hole 60 faces upward, it can relatively better complete uniform water distribution and slow down water flow disturbance.

[0037] The sewage in the coagulation area C flows to the lower part of the separation area D under the guidance of the flow guide structure 7, and as the liquid level rises to the height of the subsidence promoting structure 10, and completes separation and settlement under the action of the subsidence promoting structure 10. The settled sludge is uniformly collected and discharged through the sludge collection pipe 8, or is backflowed to the coagulation mixing area A in an air stripping manner for secondary treatment, and in this process, the PLC control can be used to realize the rhythmic opening and closing of the air stripping control valve 14, realize the stable and controllable sludge backflow amount, and at the same time avoid the accumulation of sludge in the sludge tank.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present application, and those skilled in the art can make various similar expressions under the inspiration of the present application without violating the purpose and claims of the present application, and such changes fall within the protection scope of the present application.

Claims

1. A simple and efficient sedimentation tank, comprising an inclined sedimentation-promoting structure (10) and a water distribution pipe (6), characterized in that: The water distribution pipe (6) is located on the back side of the settling structure (10) and close to the upper part of the settling structure (10). The water distribution pipe (6) has water distribution holes (60).

2. The simple and efficient sedimentation tank according to claim 1, characterized in that: The water distribution hole (60) faces upward.

3. The simple and efficient sedimentation tank according to claim 1 or 2, characterized in that: The water distribution pipe (6) is arranged along the length direction of the settling structure (10), and the water distribution holes (60) are evenly arranged along the length direction of the water distribution pipe (6).

4. The simple and efficient sedimentation tank according to any one of claims 1 or 2, characterized in that: The sedimentation tank has a coagulation mixing zone (A), and there is an inlet (1) connected to the upper part of the coagulation mixing zone (A).

5. The simple and efficient sedimentation tank according to claim 4, characterized in that: The sedimentation tank has a flocculation mixing zone (B) that is connected to the coagulation mixing zone (A), and the flocculation mixing zone (B) is connected to the water distribution pipe (6) through the inter-section connecting pipe (5).

6. The simple and efficient sedimentation tank according to claim 5, characterized in that: An air agitator (2) is provided in the coagulation mixing zone (A) and / or flocculation mixing zone (B); The flocculation mixing zone (B) is equipped with a sludge concentration meter (4).

7. The simple and efficient sedimentation tank according to claim 1, characterized in that: The bottom of the sedimentation structure (10) has a vertically downward extending guide structure (7), the back side of which is a coagulation zone (C) and the front side is a separation zone (D).

8. The simple and efficient sedimentation tank according to claim 1, 2, or 7, characterized in that: The sedimentation tank is provided with at least one strip-shaped sludge hopper (9) at the bottom, and a sludge collection pipe (8) is provided near the bottom of the sludge hopper (9), the sludge collection pipe (8) having an upward-facing sludge collection hole.

9. The simple and efficient sedimentation tank according to claim 8, characterized in that: The outer end of the sludge collection pipe (8) is connected to an air lift pipe (12). The end of the air lift pipe (12) away from the sludge collection pipe (8) is connected to the coagulation mixing zone (A). The air lift pipe (12) is connected to an air inflation pipe (13). Each air inflation pipe (13) is equipped with an air lift control valve (14).

10. The simple and efficient sedimentation tank according to claim 1, 2, or 7, characterized in that: The sedimentation tank is provided with an overflow pipe (11), and the overflow pipe (11) has overflow holes (110) distributed along its length direction. The overflow pipe (11) is located above the sedimentation promotion structure (10). The sedimentation tank is provided with an overflow pipe port (15) corresponding to the overflow pipe (11), and the overflow pipe (11) and the overflow pipe port (15) are rotatably connected.

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