CN215232290U - A high-efficient vertical flow sedimentation tank for sewage treatment - Google Patents
A high-efficient vertical flow sedimentation tank for sewage treatment Download PDFInfo
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- CN215232290U CN215232290U CN202120623365.5U CN202120623365U CN215232290U CN 215232290 U CN215232290 U CN 215232290U CN 202120623365 U CN202120623365 U CN 202120623365U CN 215232290 U CN215232290 U CN 215232290U
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Abstract
The utility model discloses a high-efficient vertical flow formula sedimentation tank for sewage treatment, including sedimentation tank, inlet tube, agitator, its characterized in that: the water outlet of the water inlet pipe is horizontally and tangentially arranged along the inner wall of the sedimentation tank; the water outlet of the water inlet pipe is consistent with the rotation direction of the stirrer; a plurality of layers of grids are arranged in the sedimentation tank along the axial direction; the mesh apertures of the grids are different. The water inlet pipe is horizontally and tangentially arranged, so that sludge in a bottom settling area is not stirred and backflushed; the flow direction of the inlet water is consistent with the rotation direction of the central shaft stirrer, so that the sewage in the tank is driven to uniformly rotate, and the sludge sedimentation rate is improved; the bottom rotational flow continuously scours the side wall of the conical hopper to prevent sludge from adhering and generating methane through long-time fermentation; a plurality of layers of grids are axially arranged in the tank, so that the sludge sedimentation is more uniform; the grating has a screening effect on sludge particles, and can scatter bubbles to prevent sludge from floating upwards; under the condition of achieving the same effluent quality, the occupied area of the sedimentation tank is reduced as much as possible.
Description
Technical Field
The utility model relates to a sewage treatment technical field especially relates to a high-efficient vertical flow formula sedimentation tank for sewage treatment.
Background
In sewage treatment technology, a sedimentation tank is mainly used for removing sludge in water through natural sedimentation or coagulating sedimentation. Because the specific gravity of the sludge particles is very close to that of water, the sludge particles are settled by the gravity of the sludge particles, the required retention time is quite long, the occupied area of the sedimentation tank is very large, the tiny sludge particles in the sewage are difficult to remove by static sedimentation in a short time, and the requirements can be met only by adding other facilities behind the sedimentation tank for advanced treatment.
The existing vertical sedimentation tank is characterized in that a central pipe vertically downwards feeds water, and although an umbrella-shaped baffle at the pipe opening disperses and slows down the downward impact force, the sludge in a bottom sedimentation area is stirred and backflushed, so that the sedimentation effect is poor.
In addition, the sludge gradually precipitates and adheres to the side wall of the conical hopper, the sludge cannot be discharged in time, methane bubbles can be generated continuously after long-term fermentation, sludge particles in the settled sludge float upwards, scum is formed on the surface of the tank, and the settling effect is seriously influenced.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art, the utility model aims to provide a high-efficient vertical flow formula sedimentation tank for sewage treatment further improves sludge settling rate, avoids intaking and stirs and recoil to bottom mud, prevents mud adhesion bagger lateral wall, reduces pond face dross.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a high-efficient vertical flow formula sedimentation tank for sewage treatment, includes sedimentation tank, inlet tube, agitator, its characterized in that: the water outlet of the water inlet pipe is horizontally and tangentially arranged along the inner wall of the sedimentation tank; the water outlet of the water inlet pipe is consistent with the rotation direction of the stirrer; a plurality of layers of grids are arranged in the sedimentation tank along the axial direction; the mesh apertures of the grids are different.
The grid is disc-shaped.
The grating is in a fan blade shape.
Each grid of the fan-shaped grids forms a certain inclination angle with the horizontal plane.
The grating is a perforated plate.
The grid is a screen.
The grid is made of stainless steel.
The grid is made of plastic materials.
The water outlet of the water inlet pipe is positioned in the middle of the sedimentation tank.
The water outlet of the water inlet pipe is positioned at the upper part of the sedimentation tank.
Due to the adoption of the scheme, the beneficial effects of the utility model are that: by arranging the water inlet pipe in a horizontal tangential manner, the water flow of the inlet water spirally descends, and sludge in a bottom settling area is not stirred and backflushed; the flow direction of the inlet water is consistent with the rotation direction of the central shaft stirrer, the sewage in the pool is driven to uniformly rotate, the relative sedimentation distance is increased, and the sedimentation rate of the sludge in the water is improved under the combined action of centrifugal force and gravity; the bottom rotational flow continuously scours the side wall of the conical hopper, so that the sludge is transferred to a sludge outlet at the bottom end, and the adhesion and the long-term fermentation are prevented from generating methane; a plurality of layers of grids are axially arranged in the tank, and the apertures of meshes of each layer are designed to be different according to the rotational flow velocity gradient, so that the sludge sedimentation is more uniform; the grating has a screening effect on sludge particles in the rotational flow, generates small vortex to promote collision and combination of the sludge particles, and can break up bubbles to prevent sludge from floating upwards; under the condition of achieving the same effluent quality, the occupied area of the sedimentation tank is reduced as much as possible.
Drawings
Fig. 1 is a front view of an embodiment of the present invention.
Fig. 2 is an axial cross-sectional view of the embodiment shown in fig. 1.
In the figure: 1. the system comprises a sedimentation tank, 2. a water inlet pipe, 3. a sludge discharge pipe, 4. a stirrer blade, 5. a stirrer motor, 6. a grid, 7. a water outlet overflow trough and 8. a water outlet.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 2, the efficient vertical flow sedimentation tank for sewage treatment comprises a sedimentation tank 1, a water inlet pipe 2, a sludge discharge pipe 3, a plate and frame type stirrer 4, a stirrer motor 5, a grid 6, a water outlet overflow tank 7 and a water outlet 8.
In a sedimentation tank 1 with the diameter of 4m and the height of 5.5m, a stainless steel inlet pipe 2 of DN80 is fixed clinging to the middle tank wall, and sewage is horizontally injected from the water outlet of the inlet pipe 2 in the clockwise direction. Meanwhile, the plate-frame type stirrer 4 fixed on the central shaft in the tank rotates clockwise at a constant speed of 11r/min, so that the sewage in the tank is driven to rotate uniformly. The water flow in the middle of the sedimentation tank 1 has the fastest rotation speed, and the rotation speed is reduced from the middle to the top and the bottom of the sedimentation tank 1 along the axial direction.
The area of the middle stirrer blade 4 is not provided with a grid, a stainless steel perforated plate grid 6 with 2 layers and 3mm thickness is arranged from the middle part to the top part, and the mesh diameters of the grid 6 are respectively
And
a 3-layer-thickness 3mm stainless steel perforated plate grating 6 is arranged from the middle part to the bottom part, the aperture of the meshes of the grating 6 are respectively
And
the spacing between the layers of the grid 6 is 0.8 m.
Each fan-shaped grid 6 has a horizontal inclination angle of 16 degrees, when sewage whirls to pass through the grid 6 arranged in a fan-shaped manner, the speed of larger sludge particles is reduced after impacting the grid 6, the sludge particles are downward under the action of gravity, small vortexes are generated to promote the sludge particles to collide and combine into larger particles, and the height of the sewage after passing through a plurality of layers of grids 6 is reduced compared with that of the sewage before.
Meanwhile, under the action of centrifugal force, the sludge particles are slowly rotated at a linear speed on the same horizontal plane and gradually migrate to the position with the minimum central pressure. From the whole view, the sludge at the middle lower part of the sedimentation tank is spirally settled in an inverted trumpet shape, and is gathered at the bottom sludge discharge pipe opening 3 when reaching the bottom of the tank.
In addition, the bottom rotational flow continuously scours the side wall of the conical mud bucket, so that the sludge on the side wall can migrate to the bottom mud discharge pipe opening 3, and the sludge is prevented from being adhered and being fermented for a long time to generate methane. The upper grid 6 of the sedimentation tank 1 has the functions of screening and mixing smaller sludge particles, and can scatter floating bubble-containing sludge to prevent floating slag from appearing on the water surface, and supernatant filtered by the layer-by-layer grid 6 flows into the water outlet 8 through the water outlet overflow trough 7.
The present invention is not limited by the above embodiments, and the present invention can be modified in various ways without departing from the spirit and scope of the present invention, and these modifications and changes fall into the scope of the present invention.
Claims (9)
1. The utility model provides a high-efficient vertical flow formula sedimentation tank for sewage treatment, includes sedimentation tank, inlet tube, agitator, its characterized in that: the water outlet of the water inlet pipe is horizontally and tangentially arranged along the inner wall of the sedimentation tank; the water outlet of the water inlet pipe is consistent with the rotation direction of the stirrer; a plurality of layers of grids are arranged in the sedimentation tank along the axial direction; the mesh apertures of the grids are different.
2. The high-efficiency vertical sedimentation tank for wastewater treatment according to claim 1, wherein: the grid is disc-shaped.
3. The high-efficiency vertical sedimentation tank for wastewater treatment according to claim 1, wherein: the grating is in a fan blade shape.
4. A high efficiency vertical flow settling tank for wastewater treatment as claimed in claim 1, 2 or 3, wherein: the grating is a perforated plate.
5. A high efficiency vertical flow settling tank for wastewater treatment as claimed in claim 1, 2 or 3, wherein: the grid is a screen.
6. The high-efficiency vertical sedimentation tank for wastewater treatment according to claim 1, wherein: the grid is made of stainless steel.
7. The high-efficiency vertical sedimentation tank for wastewater treatment according to claim 1, wherein: the grid is made of plastic materials.
8. The high-efficiency vertical sedimentation tank for wastewater treatment according to claim 1, wherein: the water outlet of the water inlet pipe is positioned in the middle of the sedimentation tank.
9. The high-efficiency vertical sedimentation tank for wastewater treatment according to claim 1, wherein: the water outlet of the water inlet pipe is positioned at the upper part of the sedimentation tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120623365.5U CN215232290U (en) | 2021-03-20 | 2021-03-20 | A high-efficient vertical flow sedimentation tank for sewage treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120623365.5U CN215232290U (en) | 2021-03-20 | 2021-03-20 | A high-efficient vertical flow sedimentation tank for sewage treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215232290U true CN215232290U (en) | 2021-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120623365.5U Active CN215232290U (en) | 2021-03-20 | 2021-03-20 | A high-efficient vertical flow sedimentation tank for sewage treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215232290U (en) |
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2021
- 2021-03-20 CN CN202120623365.5U patent/CN215232290U/en active Active
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