Flocculation sedimentation tank with uniform stirring function

Abstract

The utility model provides a flocculation sedimentation tank capable of uniformly stirring, which relates to the technical field of sedimentation tank devices and comprises a tank body, partition plates, a premixing tank, a flocculation tank, a turbine stirring device and a sedimentation tank, the premixing tank, the flocculation tank and the sedimentation tank are separated by the partition plates in the tank body, and a sewage inlet pipe and a chemical feeding pipe are connected with the premixing tank. A liquid outlet is formed in the bottom of the partition plate between the premixing tank and the flocculation tank, the turbine stirring device is installed in the flocculation tank through a baffle, and a liquid discharging pipe is installed on the upper portion of the partition plate between the flocculation tank and the precipitation tank and communicated with a central pipe installed in the flocculation tank. The stirring paddle can solve the problems that the stirring effect of an existing stirring paddle for a flocculation and sedimentation tank on a flocculating agent and sewage is poor, suspended solids and particles in the sewage cannot make full contact with the flocculating agent for flocculation, slag and water entering the sedimentation tank are not completely separated, and the water quality of discharged water is affected.

Description

Technical Field

[0001] The utility model relates to the technical field of sedimentation tank devices, in particular to a flocculation sedimentation tank with uniform stirring. Background Art

[0002] Flocculation sedimentation is the process of flocculation and sedimentation of particles in water. After adding coagulants to water, the colloids and dispersed particles of suspended matter form flocs under the interaction of molecular forces, and they collide and condense with each other during the sedimentation process. Their size and mass continue to increase, and the sedimentation rate continues to increase. The alum flocs formed after adding coagulants to surface water, the organic suspended matter in sewage, and the activated sludge will all show flocculation and sedimentation during the sedimentation process.

[0003] Hospital sewage has high COD and ammonia nitrogen. After being treated in the regulating tank, hydrolysis tank, anoxic tank, aerobic tank and secondary sedimentation tank, it needs to enter the flocculation sedimentation tank for sedimentation and finally be discharged after disinfection in the disinfection tank. The existing flocculation sedimentation tank includes a stirring tank and a sedimentation tank. The sewage contacts the flocculant in the stirring tank, is stirred by the stirring paddle and then discharged into the sedimentation tank through the pipeline.

[0004] The existing flocculation sedimentation tank has the following problems during use: the deep stirring tank leads to uneven distribution of suspended matter in the tank, the stirring paddle has poor stirring effect on the flocculant and sewage, and the suspended matter and particles in the sewage cannot be fully contacted with the flocculant for flocculation, resulting in incomplete separation of the slag and water entering the sedimentation tank, affecting the water quality of the effluent. Therefore, the present application proposes a flocculation sedimentation tank with uniform stirring. Utility Model Content

[0005] In order to overcome the problems in the background technology, the utility model provides a flocculation sedimentation tank with uniform stirring, which solves the problem that the existing flocculation sedimentation tank has a deep stirring tank during use, resulting in uneven distribution of suspended matter in the tank, and the stirring paddle has a poor stirring effect on the flocculant and sewage, which cannot make the suspended matter and particles in the sewage fully contact with the flocculant for flocculation, resulting in incomplete separation of slag water entering the sedimentation tank, affecting the water quality of the effluent.

[0006] A flocculation sedimentation tank with uniform stirring comprises a tank body, a partition, a premixing tank, a flocculation tank, a turbine stirring device and a sedimentation tank, wherein the premixing tank, the flocculation tank and the sedimentation tank are separated by a partition in the tank body, a sewage inlet pipe and a drug feeding pipe are connected to the premixing tank, a liquid outlet is provided at the bottom of the partition between the premixing tank and the flocculation tank, the turbine stirring device is installed in the flocculation tank through a baffle, a liquid discharge pipe is installed on the upper part of the partition between the flocculation tank and the sedimentation tank and is connected to a central pipe installed in the sedimentation tank, the outlet of the central pipe faces the bottom of the sedimentation tank, a drainage pipe is provided on the upper part of the sedimentation tank and a mud discharge pipe is provided at the bottom.

[0007] Furthermore, the turbine stirring device includes a guide sleeve, a stirring turbine and a motor. The baffle is fixed to the side wall of the tank body. The guide sleeve is installed in the middle of the flocculation tank through the baffle to divide the flocculation tank into an inlet area adjacent to the premixing tank and an outlet area adjacent to the sedimentation tank. The top and bottom of the guide sleeve are open. The stirring turbine is installed in the guide sleeve to discharge water from bottom to top. The motor is installed on the top of the tank body and the power output end is connected to the stirring shaft of the stirring turbine.

[0008] Furthermore, inclined plates are evenly installed above the outlet of the central tube in the sedimentation tank.

[0009] Furthermore, a conical diffusion platform is installed directly opposite the bottom of the sedimentation tank below the outlet of the central tube.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The present application is provided with a premixing tank, a flocculation tank, and a turbine stirring device. The sewage and the flocculant can first be pre-reacted in the premixing tank. The sewage and the flocculant after the pre-reaction are mixed and flowed upward from the bottom of the flocculation tank under the suction action of the turbine stirring device, so that the flocculation reaction can be fully carried out, and the problems of the existing flocculation sedimentation tank stirring paddle having a poor stirring effect on the flocculant and the sewage, insufficient contact between the suspended matter and the particles and the flocculant, and incomplete separation of the slag and water entering the sedimentation tank are solved; the sedimentation tank of the present application is provided with a central pipe, an inclined plate, and a diffusion table, so that the sewage can first pass into the bottom of the tank and then flow upward, which is conducive to the uniform dispersion of the sludge and the separation of the settled scum. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required for use in describing the embodiments are described.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0015] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model.

[0016] 1-tank body, 11-sewage inlet pipe, 12-dose pipe, 13-liquid outlet, 14-liquid discharge pipe, 15-central pipe, 16-drainage pipe, 17-sludge discharge pipe, 2-partition, 3-premixing tank, 4-flocculation tank, 5-turbine stirring device, 51-guide sleeve, 52-stirring turbine, 53-motor, 6-sedimentation tank, 7-baffle, 8-inclined plate, 9-diffusion table. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings to facilitate understanding by technicians.

[0018] The utility model discloses a flocculation sedimentation tank with uniform stirring, referring to Figure 1-3 A flocculation sedimentation tank with uniform stirring comprises a tank body 1, a partition 2, a premixing tank 3, a flocculation tank 4, a turbine stirring device 5 and a sedimentation tank 6, wherein the premixing tank 3, the flocculation tank 4 and the sedimentation tank 6 are separated by a partition 2 in the tank body 1, a sewage inlet pipe 11 and a dosing pipe 12 are connected to the premixing tank 3, a liquid outlet 13 is provided at the bottom of the partition 2 between the premixing tank 3 and the flocculation tank 4, the turbine stirring device 5 is installed in the flocculation tank 4 through a baffle 7, a liquid discharge pipe 14 is installed on the upper part of the partition 2 between the flocculation tank 4 and the sedimentation tank 6 and is connected to a central pipe 15 installed in the sedimentation tank 6, the outlet of the central pipe 15 faces the bottom of the sedimentation tank 6, a drainage pipe 16 is provided on the upper part of the sedimentation tank 6 and a mud discharge pipe 17 is provided at the bottom.

[0019] The sewage treated in the secondary sedimentation tank first enters the premixing tank 3 in the tank body 1 through the sewage inlet pipe 11, and the flocculant can be added into the premixing tank 3 through the dosing pipe 12 to pre-react with the sewage. After the turbine stirring device 5 is started, the pre-reacted sewage can enter the flocculation tank 4 through the liquid outlet 13. Under the vortex stirring of the turbine stirring device 5, the pre-reacted sewage is circulated and stirred from bottom to top, which can make the stirring more uniform with fewer dead corners. The sewage and the flocculant fully form flocs, and then enter the central pipe 15 in the sedimentation tank 6 through the discharge pipe 14, and are discharged into the bottom of the sedimentation tank 6 for sedimentation and separation.

[0020] See also Figure 1-3 The turbine stirring device 5 includes a guide sleeve 51, a stirring turbine 52 and a motor 53. The baffle 7 is fixed to the side wall of the tank body 1. The guide sleeve 51 is installed in the middle of the flocculation tank 4 through the baffle 7. The top and bottom of the guide sleeve 51 are open. The stirring turbine 52 is installed in the guide sleeve 51 to discharge water from bottom to top. The motor 53 is installed on the top of the tank body 1 and the power output end is connected to the stirring shaft of the stirring turbine 52. The baffle 7 and the guide sleeve 51 can divide the flocculation tank 4 into an inlet area adjacent to the premixing tank 3 and an outlet area adjacent to the sedimentation tank 6. The guide sleeve 51 can make the sewage flow upward under the action of the stirring turbine 52, so that the stirring is more uniform.

[0021] See also Figure 1-3 Inclined plates 8 are evenly spaced above the outlet of the central tube 15 in the sedimentation tank 6 to reduce the scum from reaching the water surface and blocking the pipeline, and to allow the scum to re-gather and settle below the inclined plates 8.

[0022] See also Figure 1-3The bottom of the sedimentation tank 6 below the outlet of the central tube 15 is directly opposite to a conical diffusion platform 9, which can evenly distribute the sludge for easy discharge.

[0023] Working process:

[0024] The sewage treated in the secondary sedimentation tank enters the premixing tank 3 in the tank body 1, pre-reacts with the flocculant added by the dosing pipe 12, and the stirring turbine 52 is started by the motor 53. The sewage enters the flocculation tank 4 through the liquid outlet 13, flows upward through the guide sleeve 51 after being stirred by the vortex, enters the central pipe 15 in the sedimentation tank 6 through the discharge pipe 14, and is discharged to the bottom of the sedimentation tank 6. The sludge is evenly deposited and distributed on the bottom of the tank by the diffusion table 9, and the clean water is filtered upward through the inclined plate 8 and discharged by the drain pipe 16, and the sludge is regularly discharged by the sludge discharge pipe 17.

[0025] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A flocculation sedimentation tank with uniform stirring, characterized in that: The invention comprises a tank body (1), a partition (2), a premixing tank (3), a flocculation tank (4), a turbine stirring device (5) and a sedimentation tank (6), wherein the premixing tank (3), the flocculation tank (4) and the sedimentation tank (6) are separated by a partition (2) in the tank body (1), a sewage inlet pipe (11) and a drug feeding pipe (12) are connected to the premixing tank (3), a liquid outlet (13) is provided at the bottom of the partition (2) between the premixing tank (3) and the flocculation tank (4), the turbine stirring device (5) is installed in the flocculation tank (4) through a baffle (7), a liquid discharge pipe (14) is installed on the upper part of the partition (2) between the flocculation tank (4) and the sedimentation tank (6) and is communicated with a central pipe (15) installed in the sedimentation tank (6), the outlet of the central pipe (15) faces the bottom of the sedimentation tank (6), a drainage pipe (16) is provided on the upper part of the sedimentation tank (6) and a mud discharge pipe (17) is provided at the bottom.

2. The flocculation sedimentation tank with uniform stirring according to claim 1, characterized in that: The turbine stirring device (5) comprises a guide sleeve (51), a stirring turbine (52) and a motor (53); the baffle (7) is fixed to the side wall of the tank body (1); the guide sleeve (51) is installed in the middle of the flocculation tank (4) through the baffle (7); the top and bottom of the guide sleeve (51) are open; the stirring turbine (52) is installed in the guide sleeve (51) to discharge water from bottom to top; the motor (53) is installed on the top of the tank body (1) and the power output end is connected to the stirring shaft of the stirring turbine (52).

3. The flocculation sedimentation tank with uniform stirring according to claim 1, characterized in that: Inclined plates (8) are evenly spaced and installed above the outlet of the central tube (15) in the sedimentation tank (6).

4. The flocculation sedimentation tank with uniform stirring according to claim 1, characterized in that: A conical diffusion platform (9) is installed directly opposite the bottom of the sedimentation tank (6) below the outlet of the central tube (15).

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