Flocculation and sedimentation device for sewage treatment

Abstract

The utility model relates to a sewage treatment flocculation precipitation device which comprises a precipitation box and a water changing shell, the bottom of the precipitation box is of a conical structure, a flocculation box is arranged on one side of the precipitation box, the bottom of the flocculation box is communicated with the precipitation box, a filtering piece is arranged on the top of the flocculation box, the water changing shell is arranged on the top of the precipitation box, and a hollow shaft is arranged on the water changing shell in a penetrating mode. The hollow shaft extends to the lowest position close to the settling box, a stirring rod is arranged on the hollow shaft, the hollow shaft is connected with a motor arranged on the water changing shell, a water inlet located in the water changing shell is formed in the hollow shaft, the water changing shell is connected with a water pump, the water pump is connected with a first drainage pipe, and the drainage end of the first drainage pipe is located above the filtering part and faces the filtering part. The bottom of the settling tank is designed to be of a conical structure, so that sediments are intensively guided to the liquid suction end of the hollow shaft, sewage and the sediments are sucked away by a water pump and are discharged on the coarse filter screen, the sediments are filtered out, the sewage is discharged back into the settling tank again, the sediments are conveniently cleaned, and the effective volume of the settling tank is prevented from being reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to flocculation precipitation technical field, especially relate to a sewage treatment flocculation precipitation device. BACKGROUND

[0002] In the process of treating sewage, flocculation precipitation is a common technology, by adding flocculants such as iron salt, polyaluminum etc., the stability of suspended particles in water can be destroyed, so that it is gathered into floc. These flocs can be further grown under the action of stirring or / and aeration, and finally settle to the bottom of the pool, so as to realize the effective removal of suspended solids.

[0003] The traditional flocculation precipitation device is mainly composed of a sedimentation tank and a stirring device. In the operation process, the sewage and the flocculant are mixed and introduced into the sedimentation tank, and are fully mixed by the stirring device or / and aeration to promote the progress of flocculation reaction. However, in this process, a large amount of precipitate is accumulated at the bottom of the sedimentation tank, which not only reduces the effective volume of the sedimentation tank, but also brings inconvenience to the cleaning work. SUMMARY

[0004] The utility model provides a sewage treatment flocculation precipitation device, through the design of the bottom of the sedimentation tank into conical structure, make the precipitate be concentrated and guided to the liquid suction end of the hollow shaft, utilize water pump to suck away sewage and precipitate and arrange on the coarse filter screen, make the precipitate be filtered out and the sewage is arranged back in the sedimentation tank, it is convenient to clean the precipitate.

[0005] The utility model adopts the technical scheme of:

[0006] A sewage treatment flocculation precipitation device, including the sedimentation tank and the water change shell, the bottom of the sedimentation tank is conical structure, one side of the sedimentation tank is equipped with the flocculation tank, the bottom of the flocculation tank is connected to one side of the bottom of the sedimentation tank, the top of the flocculation tank is detachably equipped with the filter piece, the water change shell is worn on the top of the sedimentation tank, the hollow shaft is rotatably worn on the water change shell, the lower end of the hollow shaft extends to the lowest point close to the sedimentation tank, the hollow shaft is equipped with a plurality of stirring rods in the sedimentation tank, the hollow shaft is connected with the motor on the top of the water change shell, the hollow shaft is equipped with the water inlet in the water change shell, the water change shell is connected with the water pump, the water pump is connected with the drain pipe one, and the drain end of the drain pipe one is located above the filter piece and is directed to the filter piece.

[0007] Further, the filter piece includes a flange sleeve movably placed on the top of the flocculation tank, the flange sleeve is provided with a coarse filter screen, and the drain end of the drain pipe one is directed to the coarse filter screen.

[0008] Further, the flocculation tank side wall is provided with a medicine storage tank through a support, the bottom of the medicine storage tank is connected to the upper portion of the flocculation tank through a medicine discharge pipe, and a plurality of flow guides are staggered on the opposite inner walls of the flocculation tank.

[0009] Further, the medicine discharge pipe is provided with a flow valve.

[0010] Further, the coarse filter screen is provided with a second drain pipe.

[0011] Further, the sedimentation tank side wall is provided with a third drain pipe, the water inlet end of the third drain pipe is provided with a fine filter screen, the fine filter screen is arranged on the inner wall of the sedimentation tank, and a brush coupled with the fine filter screen is arranged on the stirring rod.

[0012] Further, the lower end of the hollow shaft is in a trumpet shape.

[0013] Further, the lower side of the hollow shaft is provided with a scraper, and the scraper is attached to the bottom of the sedimentation tank.

[0014] Compared with the prior art, the beneficial effects of the present application are:

[0015] The hollow shaft is driven by the motor to rotate in the sedimentation tank, the stirring rod is driven by the hollow shaft to stir the sewage to improve the flocculation reaction effect of the sewage, the floc is deposited at the bottom of the sedimentation tank, the bottom of the sedimentation tank is designed in a conical structure, so that the sediment is concentrated and guided to the lowest part of the bottom of the sedimentation tank, the sewage and the sediment are sucked out by the hollow shaft, the sewage and the sediment are discharged on the filter element through the first drain pipe, the sediment in the sewage is filtered out and then discharged back into the sedimentation tank, the sediment and the sewage in the sedimentation tank can be continuously pumped out, filtered and then discharged back into the sedimentation tank, and the sediment can be conveniently cleaned. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a whole structure schematic view of the present application;

[0017] Fig. 2 It is a bottom view of the flange sleeve and the coarse filter screen;

[0018] In the figure: 1, flocculation tank; 2, sedimentation tank; 3, scraper; 4, hollow shaft; 5, stirring rod; 6, brush; 7, fine filter screen; 8, second drain pipe; 9, water changing shell; 10, motor; 11, water inlet; 12, water suction pipe; 13, water pump; 14, first drain pipe; 15, third drain pipe; 16, medicine storage tank; 17, flow valve; 18, support; 19, medicine discharge pipe; 20, coarse filter screen; 21, flange sleeve; 22, flow guide. DETAILED DESCRIPTION

[0019] In order to better understand the technical content of the present application, specific embodiments are provided below, and the present application is further described in conjunction with the drawings.

[0020] Referring to Figs. 1-2 The utility model provides a sewage treatment flocculation and precipitation device, including the precipitation tank 2 and the water change shell 9, the precipitation tank 2 bottom is tapered structure, one side of the precipitation tank 2 is fixed with flocculation tank 1, the flocculation tank 1 bottom is communicated with the precipitation tank 2 bottom one side, the flocculation tank 1 top is detachably provided with filter piece, the water change shell 9 is fixed and is provided on the precipitation tank 2 top, the water change shell 9 is rotatably provided with hollow shaft 4, the lower end of hollow shaft 4 extends to the lowest part near the precipitation tank 2, a plurality of stirring rods 5 are equipped on the hollow shaft 4, and the stirring rod 5 is located in the precipitation tank 2, and the hollow shaft 4 is connected with motor 10, and the motor 10 is arranged on the water change shell 9 top, and the hollow shaft 4 is equipped with water inlet 11, and the water inlet 11 is located in the inside of water change shell 9, and the water change shell 9 is connected with water pump 13 through water suction pipe 12, and the drainage end of water pump 13 is connected with hard drain pipe no. 14, and the drainage end of drain pipe no. 14 is located above filter piece and is towards filter piece;

[0021] In use, the hollow shaft 4 is driven to rotate in the precipitation tank 2 by the motor 10, the stirring rod 5 is driven by the hollow shaft 4 to stir the sewage to improve the effect of sewage flocculation reaction, the grown flocculation is precipitated in the bottom of the precipitation tank 2, the bottom of the precipitation tank 2 is designed into tapered structure, so that the precipitate is concentrated and guided to the lowest part of the bottom of the precipitation tank 2, the sewage and the precipitate are sucked out by the hollow shaft 4, the sewage is sequentially discharged on the filter piece through the hollow shaft 4, the water inlet 11, the water change shell 9, the water suction pipe 12, the water pump 13 and the drain pipe no. 14, so that the precipitate in the sewage is filtered out and then discharged back into the precipitation tank 2, the precipitate and the sewage in the precipitation tank 2 can be continuously pumped out, filtered and then discharged back into the precipitation tank 2, which facilitates the cleaning of the precipitate.

[0022] Preferably, the filter piece includes a flange sleeve 21 movably placed on the top of the flocculation tank 1, a coarse filter screen 20 is arranged in the flange sleeve 21, the drainage end of the drain pipe no. 14 is directed towards the coarse filter screen 20, the flange sleeve 21 is supported on the top of the flocculation tank 1 by the flange on the upper end of the flange sleeve 21, which facilitates the disassembly, replacement and cleaning of the coarse filter screen 20, and the pumped-out sewage is discharged on the coarse filter screen 20.

[0023] Preferably, a support 18 is fixed on the side wall of the flocculation tank 1, the support 18 is fixedly connected with a medicine storage tank 16 at an inclination, the bottom of the medicine storage tank 16 is connected to the upper part of the flocculation tank 1 through a medicine discharge pipe 19, the flocculant in the medicine storage tank 16 is discharged into the flocculation tank 1 through the medicine discharge pipe 19 to mix with the sewage, a plurality of flow guides 22 are arranged on the opposite inner walls of the flocculation tank 1 in a staggered manner, so that the sewage flows downward along the flow guides 22 and then flows back into the precipitation tank 2, which can increase the mixing process of the sewage and the flocculant and improve the flocculation effect.

[0024] Preferably, a flow valve 17 is arranged on the medicine discharge pipe 19 to control the discharge amount of the flocculant into the flocculation tank 1.

[0025] Preferably, the coarse filter screen 20 is fixed with a drain pipe two 8 above, which is used to drain the sewage without flocculation treatment into the flocculation tank 1.

[0026] Preferably, the side wall of the sedimentation tank 2 is provided with a drain pipe three 15, the water inlet end of the drain pipe three 15 is provided with a fine filter screen 7, the filter hole of the coarse filter screen 20 is smaller than that of the coarse filter screen 20, which is used to fine filter the sewage, the fine filter screen 7 is arranged on the inner wall of the sedimentation tank 2, the uppermost stirring rod 5 is provided with a brush 6 coupled with the fine filter screen 7, and in the filtering process, the hollow shaft 4 drives the brush 6 to constantly sweep the fine filter screen 7 through the stirring rod 5, so that the fine filter screen 7 can be prevented from being blocked.

[0027] Preferably, the lower end of the hollow shaft 4 is trumpet-shaped, which is conducive to guiding the sediment into the hollow shaft 4.

[0028] Preferably, the lower side of the hollow shaft 4 is fixed with a scraper 3, the scraper 3 is attached to the bottom of the sedimentation tank 2, and the scraper 3 is constantly swept on the bottom of the sedimentation tank 2 by the hollow shaft 4, which is conducive to scraping the sediment to the lowest part of the bottom of the sedimentation tank 2.

[0029] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A flocculation and sedimentation device for sewage treatment, characterized by: The utility model relates to a water purifier, which comprises a sediment tank and a water changing shell, the bottom of the sediment tank is in a conical structure, one side of the sediment tank is provided with a flocculation tank, the bottom of the flocculation tank is communicated with one side of the bottom of the sediment tank, a filter element is detachably arranged on the top of the flocculation tank, the water changing shell is arranged on the top of the sediment tank, a hollow shaft is rotatably arranged on the water changing shell, the lower end of the hollow shaft extends to the lowest position close to the sediment tank, a plurality of stirring rods are arranged on the hollow shaft in the sediment tank, an electric motor is arranged on the top of the water changing shell and connected with the hollow shaft, a water inlet is arranged on the hollow shaft in the water changing shell, the water changing shell is connected with a water pump, the water pump is connected with a drain pipe one, the drain end of the drain pipe one is located above the filter element and faces the filter element. The filter element comprises a flange sleeve movably arranged on the top of the flocculation tank, a coarse filter screen is arranged in the flange sleeve, and the drain end of the drain pipe one faces the coarse filter screen.

2. The device according to claim 1, characterized in that: A medicine storage tank is obliquely arranged on the side wall of the flocculation tank through a support, the bottom of the medicine storage tank is connected with the upper part of the flocculation tank through a medicine discharging pipe, and a plurality of flow guide plates are alternately arranged on the opposite inner walls of the flocculation tank.

3. The device according to claim 2, characterized in that: A flow valve is arranged on the medicine discharging pipe.

4. The device according to claim 3, characterized in that: A drain pipe two is arranged above the coarse filter screen.

5. The device according to any one of claims 1 to 4, characterized in that: A drain pipe three is arranged on the side wall of the sediment tank, a fine filter screen is arranged on the water inlet end of the drain pipe three, the fine filter screen is arranged on the inner wall of the sediment tank, and a brush is arranged on the stirring rod and coupled with the fine filter screen.

6. The device according to any one of claims 1 to 4, characterized in that: The lower end of the hollow shaft is in a trumpet shape.

7. The device according to any one of claims 1 to 4, characterized in that: A scraper is arranged on the lower side of the hollow shaft and attached to the bottom of the sediment tank.

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