CN213313511U - Bottom water inlet type sedimentation tank for town sewage treatment - Google Patents
Bottom water inlet type sedimentation tank for town sewage treatment Download PDFInfo
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- CN213313511U CN213313511U CN202021807102.1U CN202021807102U CN213313511U CN 213313511 U CN213313511 U CN 213313511U CN 202021807102 U CN202021807102 U CN 202021807102U CN 213313511 U CN213313511 U CN 213313511U
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- sedimentation tank
- water inlet
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- sewage treatment
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Abstract
The utility model discloses a formula sedimentation tank of intaking in town sewage treatment bottom relates to the town sewage treatment field. The device comprises a sedimentation tank, a water inlet channel, a water inlet pipe, a sludge collecting device and a sludge discharge pipe; the bottom of the water inlet channel is communicated with the sedimentation tank through a water inlet; the upper part of the sedimentation tank is provided with an annular water outlet groove. The utility model discloses deposit efficiently, the sedimentation tank adopts the bottom to intake, has effectively avoided the water inlet to the disturbance of sludge blanket, through increasing inlet tube flow and mud pipe flow, makes the velocity of flow more even that makes progress, reduces mud stock in the mud bucket, further promotes and deposits efficiency.
Description
Technical Field
The utility model relates to a town sewage treatment field, the more specifically it is a formula sedimentation tank of intaking in town sewage treatment bottom that says so.
Background
In recent years, with the rapid development of the urbanization course of China, the amount of urban sewage is rapidly increased, and a large amount of urban sewage is discharged into a natural water body after being treated by a sewage plant. By 2017, the treatment capacity of the sewage plant built nationwide is up to 1.48 hundred million tons/day, and the sewage treatment rate exceeds 90 percent. The activated sludge process is widely used for treating town sewage because of simple operation and convenient operation and management.
The sedimentation tank is an indispensable process unit of an activated sludge process, and the sedimentation tank commonly used for sewage treatment mainly comprises a horizontal flow type sedimentation tank, an inclined tube type sedimentation tank and a vertical flow type sedimentation tank, and the vertical flow type sedimentation tank is only suitable for small-scale sewage treatment plants due to the special construction of the vertical flow type sedimentation tank. In addition, the concentration of sludge entering the sedimentation tank is generally 2000mg/L-4000mg/L at present, and the sedimentation tank limits the concentration of sludge, thereby restricting the further development of the activated sludge method.
Therefore, in order to realize a sedimentation tank which has high sedimentation efficiency and is suitable for separating high-concentration activated sludge, the development of a sedimentation tank with water fed from the bottom is necessary.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects of the prior art and providing a bottom water inlet type sedimentation tank for town sewage treatment.
In order to realize the purpose, the technical scheme of the utility model is that: town sewage treatment bottom formula sedimentation tank of intaking, its characterized in that: the device comprises a sedimentation tank, a water inlet channel positioned on the side surface of the sedimentation tank, a water inlet pipe connected with the water inlet channel, a mud collecting device positioned at the bottom in the sedimentation tank, and a mud discharging pipe, wherein one end of the mud collecting device is positioned at the bottom of the mud collecting device, and the other end of the mud discharging pipe extends out of the sedimentation tank;
the bottom of the water inlet channel is communicated with the sedimentation tank through a water inlet;
an annular water outlet groove is formed in the upper part of the sedimentation tank; one end of the water outlet pipe is connected with the water outlet groove, and the other end extends out of the sedimentation tank.
In the technical scheme, a water inlet baffle is arranged on the wall of the sedimentation tank above the water inlet.
In the above technical scheme, the inner side of the water outlet groove is provided with a water outlet baffle.
In the technical scheme, the top of the sedimentation tank is provided with a slag discharge pipe.
In the above technical scheme, the mud collecting device is a mud collecting hopper.
In the technical scheme, a sludge baffle is arranged in the sludge collecting hopper.
In the technical scheme, the sludge collecting device comprises a small sludge collecting hopper positioned on the side surface of the bottom in the sedimentation tank and a sludge scraper extending into the bottom of the sedimentation tank from the top of the sedimentation tank.
Compared with the prior art, the utility model has the advantages of it is following:
1) the sedimentation efficiency is high, and the sedimentation tank adopts the bottom to intake, has effectively avoided the water inlet to the disturbance of sludge blanket, is provided with the sludge baffle in the mud collection fill simultaneously, avoids the mud short current, effectively promotes sludge thickening efficiency, and the bottom is intake, the form of upper portion play water, has avoided the influence of traditional vertical flow formula sedimentation tank center section of thick bamboo, and in addition, through increasing inlet tube flow and mud pipe flow, it is more even to make the upward velocity of flow, reduces the mud stock in the mud fill, further promotes sedimentation efficiency.
2) Application scope is wide, and bottom mud collecting hopper can replace with the mud scraper, can make the velocity of flow more even upwards through increasing inlet tube flow and mud pipe flow simultaneously, can be under big, medium, the little flow condition of intaking, and the sedimentation tank homoenergetic is suitable for, and sedimentation tank application scope is wider.
Drawings
FIG. 1 is a plan view of the bottom water inlet type sedimentation tank for town sewage treatment.
Fig. 2 is a schematic structural view of the mud collecting device of the present invention when it is a mud collecting bucket.
Fig. 3 is a schematic structural view of the middle mud collecting device of the utility model when the middle mud collecting device comprises a mud scraper and a small mud collecting bucket.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the invention will be apparent and readily appreciated by the description.
With reference to the accompanying drawings: town sewage treatment bottom formula sedimentation tank of intaking, its characterized in that: the device comprises a sedimentation tank 1, a water inlet channel 2 positioned on the side surface of the sedimentation tank 1, a water inlet pipe 3 connected with the water inlet channel 2, a sludge collecting device 4 positioned at the bottom in the sedimentation tank 1, and a sludge discharge pipe 5, wherein one end of the sludge collecting device 4 is positioned at the bottom, and the other end of the sludge discharge pipe extends out of the sedimentation tank 1;
the bottom of the water inlet channel 2 is communicated with the sedimentation tank 1 through a water inlet 21; the sedimentation tank adopts bottom water inlet, the flow velocity of a water inlet can be lower than 0.02m/s, and the disturbance of the water inlet to a sludge layer is effectively avoided;
an annular water outlet groove 11 is formed in the upper part of the sedimentation tank 1; one end of the water outlet pipe 6 is connected with the water outlet groove 11, and the other end extends out of the sedimentation tank 1. The sedimentation tank 1 adopts a form of bottom water inlet and upper water outlet, and avoids the influence of a central cylinder of the traditional vertical sedimentation tank on the efficiency of the sedimentation tank.
A water inlet baffle plate 12 is arranged on the wall of the sedimentation tank 1 above the water inlet 21.
The inner side of the water outlet groove 11 is provided with a water outlet baffle 111.
And a slag discharge pipe 7 is arranged at the top of the sedimentation tank 1.
The mud collecting device 4 is a mud collecting hopper 41.
A sludge baffle 411 is arranged in the sludge collection hopper 41, so that short flow of sludge is avoided, and sludge concentration efficiency is effectively improved.
The sludge collecting device 4 comprises a small sludge collecting hopper 42 positioned on the side surface of the bottom in the sedimentation tank 1 and a sludge scraper 43 extending into the bottom of the sedimentation tank 1 from the top of the sedimentation tank 1; when the inflow is large, the mud collecting hopper at the bottom of the sedimentation tank can be replaced by the mud scraper 43, so that the sedimentation tank is more flexible in form.
In actual use, the water inlet flow of the water inlet pipe 3 is 2-8 times of the water outlet flow of the water outlet pipe 6, the sludge discharge quantity of the sludge discharge pipe 5 is 1-7 times of the water outlet flow of the water outlet pipe 6, the upward flow velocity is more uniform by increasing the flow of the water inlet pipe 3 and the flow of the sludge discharge pipe 5, the sludge stock in the sludge collecting device 4 is reduced, and the sedimentation efficiency is further improved;
the residence time of the sludge in the sedimentation tank 1 is 1.0 to 4.0 hours, and the surface load is 1.2 to 3.6m3/(m2·h)；
Other parts not described belong to the prior art.
Claims (7)
1. Town sewage treatment bottom formula sedimentation tank of intaking, its characterized in that: the device comprises a sedimentation tank (1), a water inlet channel (2) positioned on the side surface of the sedimentation tank (1), a water inlet pipe (3) connected with the water inlet channel (2), a sludge collecting device (4) positioned at the bottom in the sedimentation tank (1), and a sludge discharge pipe (5) with one end positioned at the bottom of the sludge collecting device (4) and the other end extending out of the sedimentation tank (1);
the bottom of the water inlet channel (2) is communicated with the sedimentation tank (1) through a water inlet (21);
an annular water outlet groove (11) is formed in the upper part of the sedimentation tank (1); one end of the water outlet pipe (6) is connected with the water outlet groove (11), and the other end extends out of the sedimentation tank (1).
2. The bottom water inlet type sedimentation tank for town sewage treatment as claimed in claim 1, wherein: and a water inlet baffle (12) is arranged on the wall of the sedimentation tank (1) above the water inlet (21).
3. The town sewage treatment bottom water inlet type sedimentation tank according to claim 1 or 2, which is characterized in that: and a water outlet baffle (111) is arranged on the inner side of the water outlet groove (11).
4. The bottom water inlet type sedimentation tank for town sewage treatment as claimed in claim 3, wherein: the top of the sedimentation tank (1) is provided with a slag discharge pipe (7).
5. The town sewage treatment bottom water inlet type sedimentation tank of claim 4, which is characterized in that: the mud collecting device (4) is a mud collecting hopper (41).
6. The town sewage treatment bottom water inlet type sedimentation tank of claim 5, which is characterized in that: a sludge baffle (411) is arranged in the sludge collecting hopper (41), and the sludge baffle (411) is fixed on the side wall of the sludge collecting hopper (41).
7. The town sewage treatment bottom water inlet type sedimentation tank of claim 4, which is characterized in that: the sludge collecting device (4) comprises a small sludge collecting hopper (42) positioned on the side surface of the bottom in the sedimentation tank (1) and a sludge scraper (43) extending into the bottom of the sedimentation tank (1) from the top of the sedimentation tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021807102.1U CN213313511U (en) | 2020-08-25 | 2020-08-25 | Bottom water inlet type sedimentation tank for town sewage treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021807102.1U CN213313511U (en) | 2020-08-25 | 2020-08-25 | Bottom water inlet type sedimentation tank for town sewage treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213313511U true CN213313511U (en) | 2021-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021807102.1U Active CN213313511U (en) | 2020-08-25 | 2020-08-25 | Bottom water inlet type sedimentation tank for town sewage treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213313511U (en) |
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2020
- 2020-08-25 CN CN202021807102.1U patent/CN213313511U/en active Active
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