CN219860777U - Sedimentation tank - Google Patents
Sedimentation tank Download PDFInfo
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- CN219860777U CN219860777U CN202321000724.7U CN202321000724U CN219860777U CN 219860777 U CN219860777 U CN 219860777U CN 202321000724 U CN202321000724 U CN 202321000724U CN 219860777 U CN219860777 U CN 219860777U
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- sedimentation tank
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- 238000004062 sedimentation Methods 0.000 title claims abstract description 83
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 85
- 239000010802 sludge Substances 0.000 claims abstract description 52
- 238000005192 partition Methods 0.000 claims abstract description 47
- 230000000694 effects Effects 0.000 abstract description 13
- 238000004065 wastewater treatment Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 8
- 239000010865 sewage Substances 0.000 description 6
- 238000000926 separation method Methods 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- Treatment Of Sludge (AREA)
Abstract
A sedimentation tank relates to the technical field of wastewater treatment, and has the advantages of good treatment effect, small occupied area and high sludge concentration at the bottom. In the sedimentation tank, a flow guiding area and a sedimentation area are separated by a transverse partition board, the sedimentation area is vertically divided into a sludge layer and a clear water area, and at least two longitudinal partition boards are longitudinally arranged in the sedimentation area; the clear water area is provided with a sludge interface instrument which is linked with a sludge discharge valve.
Description
Technical Field
The utility model relates to the technical field of wastewater and sewage treatment, in particular to a sedimentation tank, and especially relates to a small-sized integrated sludge-water separation unit for treating domestic sewage and industrial wastewater.
Background
The sedimentation tank is the most common type of sewage treatment mud-water separation unit, and the mud-water separation effect directly influences the quality of the effluent water quality, and also determines whether the system can stably operate.
At present, the sedimentation tank of the small-sized integrated equipment mainly has the following problems: firstly, the total height of a sedimentation part in the integrated equipment is about 3m, the total water depth after the ultra-high removal is about 2.6m, and compared with the water depth (about 4 m) of a sedimentation tank of a traditional municipal sewage treatment plant, the depth is obviously insufficient, namely, sufficient sedimentation time is not available, so that particles needing to be precipitated can flow away along with the effluent after the particles are not completely sedimented yet, and the water quality of the effluent is deteriorated; secondly, insufficient water depth of the sedimentation tank can also lead to insufficient time (generally not less than 2 h) for compression dehydration of the activated sludge at the bottom of the tank body, so that the concentration of the activated sludge flowing back to the biochemical tank from the bottom of the sedimentation tank is low, and finally the treatment efficiency of the biochemical system is reduced.
Therefore, how to provide a sedimentation tank which can have a sedimentation tank with the effect of water discharged from a traditional municipal sewage treatment plant under the influence of the adverse factors of limited sedimentation height, and the sludge concentration at the bottom of the sedimentation tank can reach the same sludge concentration as the bottom of the sedimentation tank of the municipal sewage treatment plant, has become a technical problem to be solved by the people in the art.
Disclosure of Invention
The utility model aims to provide a sedimentation tank which has good treatment effect, small occupied area and high sludge concentration at the bottom.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a sedimentation tank, comprising: the device comprises a diversion area and a sedimentation area, wherein the diversion area is separated from the sedimentation area by a transverse partition board, the sedimentation area is vertically divided into a sludge layer and a clear water area, and at least two longitudinal partition boards are longitudinally arranged in the sedimentation area;
the clear water area is provided with a sludge interface instrument which is linked with a sludge discharge valve.
In practical application, the horizontal partition plate is at least 100mm higher than the design water level of the tank body, and the height from the design water level to the bottom end of the partition plate is not less than the product of the sedimentation time and the design surface load.
Wherein the design surface load is。
Specifically, the total depth of the longitudinal partition plates is consistent with the total height of the transverse partition plates, the installation position of the bottom ends of the longitudinal partition plates is lower than that of the bottom ends of the transverse partition plates by 200-400 mm, and meanwhile, the number of the longitudinal partition plates to be assembled is larger than or equal to 10 < -5 >.
Further, the longitudinal partition plates divide the sedimentation tank evenly from the width direction.
Further, when the sludge interface instrument detects that the sludge level is close to 200mm at the bottom of the water collecting tank, the sludge valve is opened; and when the sludge level is reduced to be 200mm higher than the bottom end of the transverse partition plate, closing the sludge discharge valve.
Still further, the water collection tank is disposed at the designed water level of the clean water zone.
Still further, the water guiding area is provided with a water inlet hole, and the clear water area is provided with a water outlet hole.
Compared with the prior art, the sedimentation tank provided by the utility model has the following advantages:
in the sedimentation tank provided by the utility model, the longitudinal partition plates are arranged to effectively improve the stability of water flow, so that the influence of turbulence on sedimentation is reduced, and the sedimentation efficiency is improved; in addition, suspended matters in the mud-water mixture can be effectively intercepted by arranging the transverse partition plates, so that the quality of effluent water is greatly improved, and meanwhile, the sludge concentration at the bottom of the sedimentation tank is also improved; in addition, through setting up mud interface appearance, can the linkage control mud valve open and close to make the mud layer be located the bottom of horizontal baffle all the time, so that the mud layer plays the interception effect all the time. From analysis, the sedimentation tank provided by the utility model has the advantages of simple operation and management, capability of realizing automatic control operation, good SS (suspended substance concentration) removal effect, better effect, less occupied area and lower investment cost compared with the traditional sedimentation tank in the prior art.
Drawings
FIG. 1 is a schematic plan view of a sedimentation tank according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a cross-sectional structure of B-B in a sedimentation tank according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a cross-sectional structure of A-A in a sedimentation tank according to an embodiment of the present utility model.
Reference numerals:
i-a sludge layer; II-a clear water zone;
1-a water inlet hole; 2-transverse partition plates; 3-longitudinal separator plates; 4-a water collection tank; 5-water outlet holes; 6-a sludge interface instrument; 7-sludge position; 8-designing a water level; 9-a mud valve.
Description of the embodiments
In order to facilitate understanding, the sedimentation tank provided by the embodiment of the utility model is described in detail below with reference to the accompanying drawings.
An embodiment of the present utility model provides a sedimentation tank, as shown in fig. 1 to 3, including: the sedimentation device comprises a diversion area and a sedimentation area, wherein the diversion area is separated from the sedimentation area by a transverse partition board 2, the sedimentation area is vertically divided into a sludge layer I and a clear water area II, and at least two longitudinal partition boards 3 are longitudinally arranged in the sedimentation area;
the clear water zone II is provided with a sludge interface instrument 6, and the sludge interface instrument 6 is linked with a sludge discharge valve 9.
Compared with the prior art, the sedimentation tank provided by the embodiment of the utility model has the following advantages:
in the sedimentation tank provided by the embodiment of the utility model, the stability of water flow can be effectively improved by arranging the longitudinal baffle plate 3, so that the influence of turbulence on sedimentation is reduced, and the sedimentation efficiency is improved; in addition, suspended matters in the mud-water mixture can be effectively intercepted by arranging the transverse partition plates 2, so that the quality of effluent water is greatly improved, and meanwhile, the sludge concentration at the bottom of the sedimentation tank is also improved; in addition, through setting up mud interface appearance 6, can coordinated control the opening and closing of mud valve 9 to make mud layer I be located the bottom of horizontal baffle 2 all the time, so that mud layer I plays the interception effect all the time. From analysis, the sedimentation tank provided by the embodiment of the utility model has simple operation and management, can realize automatic control operation, has good SS (suspended substance concentration) removal effect, and has better effect, smaller occupied area and lower investment cost compared with the traditional sedimentation tank in the prior art.
In practical application, the height of the transverse partition plate 2 from the designed water level 8 to the bottom end of the partition plate is not less than the product of the sedimentation time and the designed surface load, i.e. the height of the partition plate from the designed water level to the bottom of the partition plate is not less than the sedimentation time multiplied by the designed surface load.
Wherein the design surface load is。
Specifically, the total depth of the longitudinal partition plates 3 is consistent with the total height of the transverse partition plates 2, the installation position of the bottom ends of the longitudinal partition plates 3 is lower than that of the bottom ends of the transverse partition plates 2 by 200-400 mm, and meanwhile, the number of the longitudinal partition plates 3 is required to ensure that the Froude number Fr is more than or equal to 10-5.
It should be added here that the longitudinal partition plate 3 is provided to improve the stability of water flow, reduce the influence of turbulence on precipitation, and improve the precipitation efficiency; the Froude number Fr is a main index of water flow stability, the larger Fr is, the more stable the water flow is, the expression is Fr=v2/Rg, wherein v is the water flow speed, R is the hydraulic radius, g is the gravitational acceleration (9.81 kg/cm < 2 >), as can be known from the above expression, under the condition that the water inflow is constant, the water flow speed v is a constant value, the smaller the hydraulic radius R is, the larger Fr is, the more stable the water flow is, the more favorable the precipitation is, so the longitudinal baffle 3 is arranged to enable the hydraulic radius R to be smaller;
the transverse partition plate 2 is arranged, so that the mud-water mixture entering the sedimentation tank flows into the middle lower part of the sedimentation tank from top to bottom, turns over the bottom of the guide plate, and reaches the water collecting tank 4 from bottom to top through the mud layer I to discharge water; the sludge layer I has good interception function, can intercept suspended matters in a sludge-water mixture, greatly improves the quality of effluent water, and simultaneously improves the sludge concentration at the bottom of the sedimentation tank;
in addition, clear water district II sets up mud interface appearance 6, monitors the mud height in the sedimentation tank for mud layer I is located between the bottom of horizontal baffle 2 and the bottom of water catch bowl 4 all the time through the opening and close of control mud valve 9, makes mud layer I exert the interception effect all the time.
Further, the longitudinal partition 3 equally divides the sedimentation tank from the width direction.
Further, when the sludge interface instrument 6 detects that the sludge level 7 is 200mm near the bottom of the water collecting tank 4, the sludge discharge valve 9 is opened; when the sludge level 7 is lowered to 200mm higher than the bottom end of the transverse partition plate 2, the sludge discharge valve 9 is closed.
Still further, the water collection tank 4 is disposed at the design water level 8 of the clean water zone II.
Still further, the above-mentioned diversion area is provided with inlet opening 1, the above-mentioned clear water area II is provided with water outlet opening 5.
The working process of the sedimentation tank provided by the embodiment of the utility model is described in detail below with reference to the accompanying drawings:
the water inlet 1 is positioned at the upper part of the diversion area, the mud-water mixture enters the diversion area from the water inlet 1, and under the rectification action of the diversion area, the mud-water mixture uniformly enters the sedimentation area from the bottom of the transverse partition plate 2;
the mud-water mixture enters a sedimentation zone, mud-water separation is completed in the sedimentation zone, namely, the sludge with higher density is sedimented to the bottom of the tank body to form a sludge layer I, a clear water zone II is formed at the upper part, and clear water in the clear water zone II flows out through the water outlet holes 5 after being collected by the water collecting tank 4; the sedimentation area is provided with the longitudinal baffle plates 3, and under the rectification action of the longitudinal baffle plates 3, water flow tends to be stable, so that the mud-water separation efficiency is improved;
along with the increase of the mud-water mixture, the mud position 7 of the mud layer I gradually rises, and after the mud position is 200mm higher than the transverse partition plate, the mud layer I gradually has an interception function, so that the water outlet effect is good, and meanwhile, the mud concentration of the mud layer I is also gradually increased;
when the sludge level 7 of the sludge layer I rises to a certain height and approaches the water collecting tank 4, the sludge interface instrument 6 controls the sludge discharge valve 9 to discharge a certain amount of sludge, so that the sludge level 7 is lowered to be about 200mm higher than the bottom of the transverse partition plate 2.
In summary, the sedimentation tank provided by the embodiment of the utility model mainly has the following advantages:
1. the treatment effect is good: the test result shows that the SS concentration (suspended matter concentration) of the effluent is stably less than 10mg/L;
2. the occupied area is small: the sedimentation tank can be selected from higher surface loadThereby greatly saving the occupied area;
3. the sludge concentration at the bottom of the sedimentation tank is high: the test result proves that the sludge concentration MLSS at the bottom of the sedimentation tank is as high as 12g/L, so that the concentration of the activated sludge flowing back to the biochemical tank from the bottom of the sedimentation tank is high, and the improvement of the treatment efficiency of the biochemical system is facilitated.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Claims (8)
1. A sedimentation tank, characterized by comprising: the device comprises a diversion area and a sedimentation area, wherein the diversion area is separated from the sedimentation area by a transverse partition board, the sedimentation area is vertically divided into a sludge layer and a clear water area, and at least two longitudinal partition boards are longitudinally arranged in the sedimentation area;
the clear water area is provided with a sludge interface instrument which is linked with a sludge discharge valve.
2. The sedimentation tank of claim 1, wherein the transverse partition is at least 100mm above the design water level of the tank body and the height of the transverse partition from the design water level to the bottom end of the partition is no less than the product of sedimentation time and design surface load.
3. The sedimentation tank of claim 2, wherein the design surface load is。
4. A sedimentation tank according to any one of claims 1-3, wherein the total depth of the longitudinal partition is identical to the total height of the transverse partition, the bottom end mounting position of the longitudinal partition is lower than the bottom end of the transverse partition by 200-400 mm, and the number of the longitudinal partition is such that the Fr number is not less than 10 -5 。
5. The sedimentation tank of claim 4, wherein the longitudinal partition divides the sedimentation tank equally in a width direction.
6. The sedimentation tank of claim 2, wherein the sludge valve is opened when the sludge interface meter detects that the sludge level is approximately 200mm at the bottom of the water collection tank; and when the sludge level is reduced to be 200mm higher than the bottom end of the transverse partition plate, closing the sludge discharge valve.
7. The sedimentation tank of claim 6, wherein the water collection sump is disposed at the design water level of the clean water zone.
8. The sedimentation tank of claim 1 or 7, wherein the diversion area is provided with water inlet holes and the clear water area is provided with water outlet holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321000724.7U CN219860777U (en) | 2023-04-28 | 2023-04-28 | Sedimentation tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321000724.7U CN219860777U (en) | 2023-04-28 | 2023-04-28 | Sedimentation tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219860777U true CN219860777U (en) | 2023-10-20 |
Family
ID=88370244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321000724.7U Active CN219860777U (en) | 2023-04-28 | 2023-04-28 | Sedimentation tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219860777U (en) |
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2023
- 2023-04-28 CN CN202321000724.7U patent/CN219860777U/en active Active
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