CN216986421U - Inclined plate sedimentation tank with back flush - Google Patents
Inclined plate sedimentation tank with back flush Download PDFInfo
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- CN216986421U CN216986421U CN202220800633.0U CN202220800633U CN216986421U CN 216986421 U CN216986421 U CN 216986421U CN 202220800633 U CN202220800633 U CN 202220800633U CN 216986421 U CN216986421 U CN 216986421U
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Abstract
The utility model belongs to the technical field of sedimentation tanks, and relates to an inclined plate sedimentation tank with back washing, which comprises a water inlet area, a sedimentation area and a water outlet area; the middle part of the sedimentation zone is provided with a central upright tube, the top of the central upright tube is communicated with a high-pressure rotary backwashing water distribution pipe through a rotary joint, the rotary joint is rotatably connected with the top of the central upright tube and is fixedly connected with the high-pressure rotary backwashing water distribution pipe, the rotary joint is driven by a motor to rotate, and the bottom of the central upright tube is communicated with a high-pressure water inlet pipe; the bottom surface of the high-pressure rotary backwashing water distribution pipe is provided with a plurality of water spray holes; one side of the high-pressure rotary backwashing water distribution pipe is connected with a slice type mud scraping plate. The utility model utilizes high-pressure washing to solve the problem that activated sludge is adhered to the inclined plate, the mud scraper can timely remove floating mud on the water surface during anaerobic treatment, and the problem of poor settling effect after the inclined plate settling tank is used for a long time can be well solved.
Description
Technical Field
The utility model relates to a sloping plate sedimentation tank with back washing, belonging to the technical field of sedimentation tanks.
Background
The inclined plate (pipe) sedimentation tank is developed according to the shallow tank theory, and is a sedimentation tank provided with a plurality of parallel inclined thin plates (pipes) with small intervals in the sedimentation tank. It features high deposition efficiency, small volume of pool and small occupied area. The inclined plate (pipe) sedimentation tank has short sedimentation time, so when meeting the change of water quality and water quantity during running, the strengthening management is needed to ensure the water quality meeting the requirement.
From the angle analysis of improving the hydraulic condition of the sedimentation tank, the hydraulic radius of the sedimentation tank is greatly reduced due to the arrangement of the inclined plate (pipe), so that the Reynolds number is greatly reduced, and the Froude number is greatly improved, and therefore, the inclined plate (pipe) sedimentation tank also meets the requirements of the stability and laminar flow of water flow. Thereby improving the precipitation effect. The theoretical principle of the shallow pool is that the length of the inclined tube sedimentation pool is L, the horizontal flow velocity in the pool is V, and the sedimentation velocity of the particles is u0Under ideal conditions, L/H is V/u0. It can be seen that the shallower the tank body, the smaller the suspended particles can be removed when the values of L and V are unchanged. If horizontal partition plates are used, the H is divided into 3 layers, the depth of each layer is H/3, and u is0Under the condition of unchanging v, the tank body only needs L/3 to mix u0The total volume may be reduced to 1/3. If the length of the pool is not changed, the horizontal flow velocity can be positively increased to 3V due to the H/3 depth of the pool, and the settling velocity can still be u0The removal of particles, i.e. the treatment capacity, is increased by a factor of 3. Meanwhile, the processing capacity can be improved by n times by dividing the sedimentation tank into n layers.
The inclined plate (pipe) sedimentation tank designed by utilizing the shallow tank theory has good sedimentation effect, can shorten the sedimentation distance of particles, reduce the sedimentation time, can obviously reduce the area of the sedimentation tank, and is widely applied to sewage treatment stations. But the swash plate (pipe) sedimentation tank also has obvious drawback, and activated sludge easily adheres to the swash plate (pipe) and influences the sedimentation effect and perhaps even blocks up the swash plate (pipe), simultaneously, under the anaerobic condition, can disturb the sediment of mud when the gas that produces through anaerobic digestion rises to bring the mud that drops off on the board to the surface of water and form the laitance layer, and sedimentation tank service life has prolonged the back sedimentation effect not good.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: the inclined plate sedimentation tank with the back flush solves the problem that activated sludge is adhered to an inclined plate by means of high-pressure flushing, a mud scraper can timely remove floating mud on the water surface during the anaerobic process, and the problem that the sedimentation effect is poor after the inclined plate sedimentation tank is long in service time can be well solved.
The utility model relates to a sloping plate sedimentation tank with back flush, which comprises a water inlet area, a sedimentation area and a water outlet area, wherein the upper part in the sedimentation area is provided with a sloping plate unit, a sludge collecting and discharging unit is arranged below the sloping plate unit, and a sewage inlet pipe of the water inlet area is communicated with the sedimentation area between the sludge collecting and discharging unit and the sloping plate unit; the middle part of the sedimentation zone is provided with a central upright column pipe, the top of the central upright column pipe is communicated with a high-pressure rotary backwashing water distribution pipe through a rotary joint, the rotary joint is rotationally connected with the top of the central upright column pipe and fixedly connected with the high-pressure rotary backwashing water distribution pipe, the rotary joint is driven to rotate by a motor, and the bottom of the central upright column pipe is communicated with a high-pressure water inlet pipe; the bottom surface of the high-pressure rotary backwashing water distribution pipe is provided with a plurality of water spray holes; one side of the high-pressure rotary backwashing water distribution pipe is connected with a slice type mud scraper.
Sewage enters a sedimentation area through a water inlet pipe, the water flow direction of the sewage entering a sedimentation tank is from bottom to top, the sewage passes through an inclined plate unit from bottom to top, sludge is precipitated in the inclined plate unit, the sludge slides down along an inclined plate of the inclined plate unit and is collected by a sludge collecting and discharging unit, and the sludge collecting and discharging unit can periodically discharge the collected sludge; the slice-type mud scraper can be fixedly connected with the high-pressure rotary backwashing water distribution pipe through concave-convex buttons and the like. During backwashing, sludge in a settling zone is discharged firstly, so that the liquid level in the settling zone is positioned below an inclined plate unit, then high-pressure water enters a high-pressure rotary backwashing water distribution pipe from a high-pressure water inlet pipe and a central upright column pipe, a motor drives a rotary joint to rotate, the rotary joint rotates to drive the high-pressure rotary backwashing water distribution pipe to rotate, the high-pressure water in the high-pressure rotary backwashing water distribution pipe is sprayed downwards from water spray holes, the high-pressure water washes an inclined plate of the inclined plate unit, the flowing direction of the sludge is consistent with the flowing direction of the high-pressure water, and the impact force of the high-pressure water is large, so that the sludge adhesion problem of an inclined plate sedimentation tank can be well solved, the sludge part stripped from the inclined plate can be re-precipitated in the sedimentation tank, and finally is discharged through a sludge collecting and discharging unit.
When the sedimentation tank works normally, the liquid level in the sedimentation zone can be located at the position of the sludge scraping plate, when sludge in the sedimentation tank generates anaerobic respiration, the liquid level in the sedimentation zone can be floated by floating sludge, at the moment, the motor drives the rotary joint to rotate, the rotary joint rotates to drive the high-pressure rotary backwashing water distribution pipe to rotate, the high-pressure rotary backwashing water distribution pipe rotates to drive the sludge scraping plate to rotate, the sludge scraping plate hangs the floating sludge on the liquid level, and the sludge is collected and discharged through the action of rotary centrifugal force, so that the problem that the quality of effluent water of the sludge floating sedimentation tank does not reach the standard is well solved. When the floating mud is more, the mud scraping plate is controlled to work, and the working time period and frequency of the mud scraping plate are related to the settling performance of the mud.
Preferably, inner wall of the top of the settling zone is additionally provided with a floating mud collecting tank, the top surface of the floating mud collecting tank is in an open shape, and the top end of the inner wall of the floating mud collecting tank is higher than the height of the mud scraper. The top end of the inner wall of the floating mud collecting pool is slightly higher than the height of the mud scraping plate, when the mud scraping plate is hung and the floating mud touches the inner wall of the floating mud collecting pool, the mud is upwards deviated along the inner wall of the floating mud collecting pool immediately and finally enters the floating mud collecting pool, and the floating mud in the floating mud collecting pool is discharged through the mud pump.
Preferably, the water outlet area is arranged on the periphery above the settling area, and the water outlet of the water outlet area is a labyrinth water outlet. The labyrinth type water outlet can further ensure the cleanliness of discharged water.
Preferably, the water outlet corresponds to the area between the mud scraping plate and the inclined plate unit, so that the water flowing out of the water outlet is clean water passing through the inclined plate unit, and the influence of floating mud on the cleanliness of discharged water can be avoided.
Preferably, the sludge discharge unit comprises a sludge collecting hopper, the bottom end of the sludge collecting hopper is communicated with a sludge discharge pipe, and a sludge discharge valve is arranged on the sludge discharge pipe. When sludge needs to be discharged, the sludge discharge valve is opened, and the sludge discharge valve is closed in other normal working environments.
Preferably, the sludge collecting hopper is in a conical shape with a wide upper part and a narrow lower part, which is beneficial to collecting and discharging sludge.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model has reasonable structural design, solves the problem that activated sludge is adhered to the inclined plate by utilizing high-pressure washing, can remove floating sludge on the water surface in the anaerobic process in time by the mud scraper, and can well solve the problem of poor settling effect after the inclined plate sedimentation tank is used for a long time.
Drawings
FIG. 1 is a schematic structural view (front view) of an inclined plate sedimentation tank with backwashing;
FIG. 2 is a top view of a tilted plate sedimentation tank with backwashing;
FIG. 3 is a schematic view showing a sludge flow direction and a sewage flow direction;
fig. 4 is a schematic view of the direction of the backwash water flow.
In the figure: 1. a settling zone; 2. a swash plate unit; 3. a water outlet area; 4. a mud scraper; 5. a motor; 6. a rotary joint; 7. a high-pressure rotary backwashing water distribution pipe; 8. a floating mud collecting tank; 9. a water outlet; 10. a sewage inlet pipe; 11. a high-pressure water inlet pipe; 12. a mud collection hopper; 13. a central post tube; 14. a mud valve; 15. a sludge discharge pipe; 16. arrow A; 17. arrow B; 18. arrow C.
Detailed Description
The utility model is further described below with reference to the accompanying drawings:
as shown in fig. 1-4, the inclined plate sedimentation tank with backwashing of the present invention comprises a water inlet region, a sedimentation region 1 and a water outlet region 3, wherein an inclined plate unit 2 is arranged at the upper part in the sedimentation region 1, a sludge collecting and discharging unit is arranged below the inclined plate unit 2, a sewage inlet pipe 10 of the water inlet region is communicated with the sedimentation region 1 between the sludge collecting and discharging unit and the inclined plate unit 2, a central upright pipe 13 is arranged at the middle part of the sedimentation region 1, the top of the central upright pipe 13 is communicated with a high-pressure rotary backwashing water distribution pipe 7 through a rotary joint 6, the rotary joint 6 is rotatably connected with the top of the central upright pipe 13, the rotary joint 6 is fixedly connected with the high-pressure rotary backwashing water distribution pipe 7, the rotary joint 6 is driven to rotate by a motor 5, and the bottom of the central upright pipe 13 is communicated with a high-pressure water inlet pipe 11; the bottom surface of the high-pressure rotary backwashing water distribution pipe 7 is provided with a plurality of water spray holes; one side of the high-pressure rotary backwashing water distribution pipe 7 is connected with a thin-sheet type mud scraping plate 4.
In this embodiment:
the inner wall of the top of the settling zone 1 is additionally provided with a floating mud collecting tank 8, the top surface of the floating mud collecting tank 8 is in an open shape, and the top end of the inner wall of the floating mud collecting tank 8 is higher than the height of the mud scraper 4. The 8 inner wall tops of mud floating collecting pit are a little higher than mud scraper 4 and set up the height, and in mud floating collecting pit 8 inner wall upwards squint finally got into mud floating collecting pit 8 along mud floating collecting pit 8 inner wall immediately when mud scraper 4 hung runs into mud floating collecting pit 8 inner wall, mud floating in the mud floating collecting pit 8 passed through the mud pump and discharged.
The water outlet zone 3 is arranged at the periphery above the sedimentation zone 1, and a water outlet 9 of the water outlet zone 3 is a labyrinth water outlet 9. The labyrinth type water outlet 9 is arranged to further ensure the cleanliness of the discharged water.
The delivery port 9 corresponds the region between the mud scraping plate 4 and the sloping plate unit 2, so that the water flowing out from the delivery port 9 is clean water passing through the sloping plate unit 2, and the influence of floating mud on the cleanliness of discharged water can be avoided.
The sludge discharge unit comprises a sludge collection hopper 12, the bottom end of the sludge collection hopper 12 is communicated with a sludge discharge pipe 15, and a sludge discharge valve 14 is arranged on the sludge discharge pipe 15. When sludge needs to be discharged, the sludge discharge valve 14 is opened, and the sludge discharge valve 14 is closed under other normal working environments. The sludge hopper 12 is in a conical shape with a wide upper part and a narrow lower part, which is beneficial to the collection and discharge of sludge.
Sewage enters a settling zone 1 through a water inlet pipe, the water flow direction of the sewage entering a settling tank is from bottom to top, the sewage passes through an inclined plate unit 2 from bottom to top, sludge is settled in the inclined plate unit 2, the sludge slides down along an inclined plate of the inclined plate unit 2 and is collected by a sludge collecting and discharging unit, and the sludge collecting and discharging unit can regularly discharge the collected sludge; the slice-type mud scraper 4 can be fixedly connected with the high-pressure rotary backwashing water distributor 7 through concave-convex buttons and the like. During backwashing, sludge in the settling zone 1 needs to be discharged firstly, so that the liquid level in the settling zone 1 is positioned below the inclined plate unit 2, then high-pressure water enters the high-pressure rotary backwashing water distribution pipe 7 from the high-pressure water inlet pipe 11 and the central upright column pipe 13, meanwhile, the motor 5 drives the rotary joint 6 to rotate, the rotary joint 6 drives the high-pressure rotary backwashing water distribution pipe 7 to rotate, high-pressure water in the high-pressure rotary backwashing water distribution pipe 7 is sprayed downwards from the water spray holes, the high-pressure water washes the inclined plate of the inclined plate unit 2, the flow direction of the sludge is consistent with the flow direction of the high-pressure water, and the impact force of the high-pressure water is large, so that the problem of sludge adhesion in the inclined plate settling tank can be well solved, and the sludge part stripped from the inclined plate can be settled again in the settling tank and is finally discharged through the sludge collecting and discharging unit.
When the sedimentation tank works normally, the liquid level in the sedimentation zone 1 can be located at the position of the sludge scraping plate 4, when sludge in the sedimentation tank generates anaerobic respiration, the liquid level in the sedimentation zone 1 can be floated by floating sludge, at the moment, the motor 5 drives the rotary joint 6 to rotate, the rotary joint 6 rotates to drive the high-pressure rotary backwashing water distribution pipe 7 to rotate, the high-pressure rotary backwashing water distribution pipe 7 rotates to drive the sludge scraping plate 4 to rotate, the sludge scraping plate 4 hangs the floating sludge on the liquid level, and the sludge is gathered and discharged under the action of rotating centrifugal force, so that the problem that the quality of effluent water of the sludge floating sedimentation tank does not reach the standard is well solved. When the floating mud is more, the operation of the mud scraping plate 4 is controlled, and the operation time period and the operation frequency of the mud scraping plate 4 are related to the sedimentation performance of the mud.
In fig. 3, an arrow A16 indicates a sludge flow direction, and an arrow B17 indicates a sewage flow direction; the arrow C18 in fig. 4 indicates the direction of the backwash water flow.
Claims (6)
1. The utility model provides a swash plate sedimentation tank with back flush, includes intake zone, settling zone (1) and play pool (3), and upper portion is equipped with swash plate unit (2) in settling zone (1), and swash plate unit (2) below is equipped with collection mud row mud unit, and intake zone's sewage inlet tube (10) intercommunication collection mud row mud unit and the settling zone (1) between swash plate unit (2), its characterized in that: a central upright column pipe (13) is arranged in the middle of the settling zone (1), the top of the central upright column pipe (13) is communicated with a high-pressure rotary backwashing water distribution pipe (7) through a rotary joint (6), the rotary joint (6) is rotationally connected with the top of the central upright column pipe (13), the rotary joint (6) is fixedly connected with the high-pressure rotary backwashing water distribution pipe (7), the rotary joint (6) is driven by a motor (5) to rotate, and the bottom of the central upright column pipe (13) is communicated with a high-pressure water inlet pipe (11); the bottom surface of the high-pressure rotary backwashing water distribution pipe (7) is provided with a plurality of water spray holes; one side of the high-pressure rotary backwashing water distribution pipe (7) is connected with a thin-sheet type mud scraping plate (4).
2. The inclined plate sedimentation tank with backwashing according to claim 1, wherein: the inner wall of the top of the settling zone (1) is additionally provided with a floating mud collecting tank (8), the top surface of the floating mud collecting tank (8) is open, and the top end of the inner wall of the floating mud collecting tank (8) is higher than the height of the mud scraper (4).
3. The inclined plate sedimentation tank with backwashing according to claim 1, wherein: the water outlet area (3) is arranged on the periphery above the sedimentation area (1), and a water outlet (9) of the water outlet area (3) is a labyrinth water outlet.
4. The inclined plate sedimentation tank with backwashing according to claim 3, wherein: the water outlet (9) corresponds to the area between the mud scraper (4) and the sloping plate unit (2).
5. The inclined plate sedimentation tank with backwashing according to claim 1, wherein: the sludge discharge unit comprises a sludge collection hopper (12), the bottom end of the sludge collection hopper (12) is communicated with a sludge discharge pipe (15), and a sludge discharge valve (14) is arranged on the sludge discharge pipe (15).
6. The inclined plate sedimentation tank with backwashing according to claim 5, wherein: the mud collecting hopper (12) is in a conical shape with a wide upper part and a narrow lower part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220800633.0U CN216986421U (en) | 2022-04-07 | 2022-04-07 | Inclined plate sedimentation tank with back flush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220800633.0U CN216986421U (en) | 2022-04-07 | 2022-04-07 | Inclined plate sedimentation tank with back flush |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216986421U true CN216986421U (en) | 2022-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220800633.0U Active CN216986421U (en) | 2022-04-07 | 2022-04-07 | Inclined plate sedimentation tank with back flush |
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| Country | Link |
|---|---|
| CN (1) | CN216986421U (en) |
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2022
- 2022-04-07 CN CN202220800633.0U patent/CN216986421U/en active Active
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