CN216604163U - Vertical flow type secondary sedimentation tank - Google Patents
Vertical flow type secondary sedimentation tank Download PDFInfo
- Publication number
- CN216604163U CN216604163U CN202120740386.5U CN202120740386U CN216604163U CN 216604163 U CN216604163 U CN 216604163U CN 202120740386 U CN202120740386 U CN 202120740386U CN 216604163 U CN216604163 U CN 216604163U
- Authority
- CN
- China
- Prior art keywords
- secondary sedimentation
- sedimentation tank
- vertical flow
- tank
- tank body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model relates to a vertical flow type secondary sedimentation tank, which is based on a special-shaped ellipse vertical flow type secondary sedimentation tank and comprises a secondary sedimentation tank main body, a flushing device, a water inlet pipe, a water outlet pipe and a sludge discharge pipe, wherein the lower end of the water inlet pipe is connected with a bell mouth, the opening is arranged downwards, the lower end of the water outlet pipe of the bell mouth is provided with a reflecting plate, the upper end of a tank body is provided with an overflow groove, the outer end of the overflow groove is connected with the water outlet pipe, the bottom of the tank body is provided with the sludge discharge pipe, and the outer side of the tank body is provided with a pump machine. The secondary sedimentation tank body determined by the special-shaped elliptic equation deduced based on the equation of the equal concentration line of the boundary of the polluted mixing zone under the condition of the river central stable point source has good continuity, stress condition and smoothness, is more suitable for the flow state of the sedimentation fluid, accelerates the sedimentation speed and improves the sedimentation efficiency.
Description
Technical Field
The utility model relates to the field of sewage treatment, in particular to a novel vertical flow type secondary sedimentation tank.
Background
The sedimentation is a process of separating solid from liquid by utilizing that the density of suspended matters in a water body is greater than that of water, and the suspended matters are sunk to the bottom of the pool under the action of gravity. The secondary sedimentation tank realizes water purification by utilizing sedimentation, and is an important structure in the sewage treatment process. It has two functions of clarification and concentration: firstly, carrying out mud-water separation to ensure the quality of effluent water; and secondly, sludge is concentrated and reflowed to ensure the stable operation of the biological treatment system, and the device plays a very important role in the whole sewage treatment system.
At present, the design of the secondary sedimentation tank is mainly based on an ideal sedimentation tank, namely, sewage is considered to flow at a constant speed in the horizontal direction in the tank, particles are in a free sedimentation state, and the particles sink to the bottom of the tank and are considered to be removed. However, in actual operation, when the solid load of the water body of the secondary sedimentation tank is too large, the treatment effect is not good; when the amount of inlet water changes, the impact load resistance is poor, so that pulse type change of a flow field in a settling zone is caused, and the settling effect is influenced.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a novel vertical flow type secondary sedimentation tank, which aims to solve the problems of unreasonable tank body structure, unsatisfactory sedimentation effect and the like.
The technical scheme adopted by the utility model is as follows:
a vertical flow type secondary sedimentation tank, comprising: the cell body, the cell body upper end is provided with the inlet tube, the delivery port of inlet tube be provided with the horn mouth, the horn mouth uncovered offer down, horn mouth play water lower extreme is provided with the reflecting plate, cell body upper end periphery be provided with the overflow launder, the overflow launder be connected with the outlet pipe, cell body bottom be provided with the mud pipe.
According to the utility model, preferably, the longitudinal section shape of the tank body satisfies the special-shaped ellipse
Where H is the height in the coordinate direction of the symmetry axis (i.e., the maximum height of the curved shape), and W is the width in the coordinate direction of the asymmetry axis (i.e., the maximum width of the curved shape).
According to the utility model, preferably, the sedimentation tank body is an inverted special-shaped ellipse, the position at the maximum width (coordinate X ═ H/e, e is a natural logarithm) of the special-shaped ellipse is used as the free liquid level of the tank body, and a rotating body of the special-shaped ellipse around the X axis at the part from the coordinate X to the H part is used as the sedimentation tank body.
According to the utility model, preferably, the water inlet pipe is arranged in the center of the upper end of the tank body and is used for the muddy water to vertically flow in.
According to the utility model, it is preferred that the diameter of the bell mouth is 1.2 to 1.4 times the diameter of the inlet pipe.
According to the present invention, it is preferable that the vertical distance between the reflection plate and the bell mouth is 0.3 m to 0.5 m; further preferably, the reflector is in an inverted V shape, and an included angle between the reflector and the horizontal direction is between 15 ° and 20 °. The reflecting plate makes water uniformly distributed in the tank body and then slowly rises along the whole water passing section.
According to the utility model, preferably, the tank body is further connected with a flushing device.
According to the utility model, preferably, the sludge discharge pipe is provided with a pump outside the tank body.
According to the utility model, preferably, the edge of the overflow groove is provided with a baffle and a scum groove to retain scum and ensure the quality of effluent.
According to the utility model, preferably, the upper end of the tank body is higher than the bottom of the overflow tank by 0.3 to 0.5 m; namely, the upper end of the tank body is ultrahigh by 0.3 to 0.5 meters.
According to the utility model, the special-shaped ellipse is a novel single-symmetry-axis two-parameter curve defined by derivation based on a pollution mixing zone boundary equal-concentration line equation under the condition of a river central stable point source, and the equation is
H is the height of the symmetric axis coordinate direction (namely the curve shape maximum height), W is the width of the asymmetric axis coordinate direction (namely the curve shape maximum width), and the shape of the pool body is determined by a special-shaped ellipse.
The compression factor of the heteromorphic ellipse is defined as the ratio of the width (or half width) in the direction of the asymmetric axis to the height (or half height) in the direction of the symmetric axis, that is, the compression factor θ is (W/H)/(H/2), and the compression factor θ is defined to be greater than 0 by combining the parameters. It can be seen that, as the compression factor increases, the deformed ellipse shape gradually changes from high thinness to short and fat, and the shape types of the deformed ellipse are divided into: when the compression coefficient θ is 1, it is called a standard type; when 0< theta <1, the product is called H type (high lean type); and when theta is larger than 1, the model is called W type (dwarf type).
The compression coefficient of the special-shaped ellipse can directly reflect the shape characteristics of the special-shaped ellipse, the compression coefficient can be determined according to the actual operation condition, and the appropriate shape of the pool body under the working condition can be found.
Mathematical analysis shows that the special-shaped ellipse and the derivative thereof have good continuity, differentiability, smoothness and integrity, the shape has good continuity, stress condition and smoothness, and the special-shaped ellipse and the derivative thereof can be more suitable for the change of the fluid state of the fluid.
Compared with the prior art, the utility model has the following beneficial effects:
the novel vertical flow type secondary sedimentation tank provided by the utility model has the advantages of good continuity in shape, good stress condition, good smoothness, more reasonable structural design, capability of greatly reducing dead flow and backflow phenomena, stable water flow state and better sedimentation effect, breaks through the traditional vertical flow type secondary sedimentation tank, is more suitable for the flow state change of fluid in the secondary sedimentation tank, accelerates the sedimentation speed and improves the sedimentation efficiency.
Drawings
FIG. 1 is a schematic view of a source of a shaped ellipse.
FIG. 2 is a schematic view of a special-shaped ellipse and a rotating body of the tank body of the secondary sedimentation tank.
Fig. 3 is a schematic diagram of deformed ellipses with different compression coefficients.
Fig. 4 is a schematic structural diagram of the present invention.
The device comprises a tank body 1, a tank body 2, a water inlet pipe 3, a bell mouth 4, a reflecting plate 5, an overflow groove 6, a water outlet pipe 7 and a sludge discharge pipe.
Detailed Description
In order to further explain the technical solution of the present invention, the following detailed description of the present invention is made with reference to the accompanying drawings and the detailed description.
Example 1
Referring to fig. 4, a vertical flow type secondary sedimentation tank includes: the device comprises a pool body 1, wherein a water inlet pipe 2 is arranged at the upper end of the pool body 1, a water outlet of the water inlet pipe 2 is provided with a bell mouth 3, the opening of the bell mouth 3 is opened downwards, a reflecting plate 4 is arranged at the lower end of the water outlet of the bell mouth 3, an overflow groove 5 is arranged on the periphery of the upper end of the pool body 1, the overflow groove 5 is connected with a water outlet pipe 6, and a sludge discharge pipe 7 is arranged at the bottom of the pool body 1;
the longitudinal section shape of the tank body 1 satisfies the special-shaped ellipse equation
Wherein H is the height in the direction of the axis of symmetry (i.e. the maximum height of the curved shape), and W is the width in the direction of the axis of asymmetry (i.e. the maximum width of the curved shape);
and taking the position at the maximum width (the coordinate X is H/e, and e is a natural logarithm) of the special-shaped ellipse as the free liquid level of the pool body, and taking a rotating body of which the part from the coordinate X between H/e to H is a special-shaped ellipse and surrounds the X axis as the sedimentation pool body 1. The compression factor of the heteromorphic ellipse is defined as the ratio of the width (or half width) in the direction of the asymmetric axis to the height (or half height) in the direction of the symmetric axis, that is, the compression factor θ is (W/H)/(H/2), and the compression factor θ is defined to be greater than 0 by combining the parameters. It can be seen that, as the compression factor increases, the deformed ellipse shape gradually changes from high thinness to short and fat, and the shape types of the deformed ellipse are divided into: when the compression coefficient θ is 1, it is referred to as a standard type; when 0< theta <1, the product is called H type (high lean type); and when theta is larger than 1, the model is called W type (dwarf type).
In this embodiment, the diameter of horn mouth 3 is 1.2 times of inlet tube 2 diameter, reflecting plate 4 is 0.3 meters with the vertical distance of horn mouth 3, reflecting plate 4 be the shape of falling V, the contained angle of reflecting plate 4 and horizontal direction is 15, reflecting plate 4 makes water slowly rise along whole water cross section after evenly distributed in cell body 1.
Example 2
As described in example 1, except that:
the water inlet pipe 2 is arranged in the center of the upper end of the tank body 1 and is used for the muddy water to vertically flow in.
Example 3
As described in example 1, except that:
the tank body 1 is also connected with a flushing device.
Example 4
As described in example 1, except that:
the sewage discharge pipe 7 is arranged outside the pool body 1 and is provided with a pump.
Example 5
As described in example 1, except that:
the edge of the overflow trough 5 is provided with a baffle and a scum trough to intercept scum and ensure the quality of effluent water.
Example 6
As described in example 1, except that:
the diameter of horn mouth 3 is 1.3 times of 2 diameters of inlet tube, reflecting plate 4 is 0.4 meter with the vertical distance of horn mouth 3, reflecting plate 4 be the shape of falling V, the reflecting plate 4 is 18 with the contained angle of horizontal direction.
Example 7
As described in example 1, except that:
the diameter of horn mouth 3 is 1.4 times of 2 diameters of inlet tube, reflecting plate 4 is 0.5 meter with the perpendicular distance of horn mouth 3, reflecting plate 4 be the shape of falling V, reflecting plate 4 is 20 with the contained angle of horizontal direction.
When the utility model is used, water enters the tank body 1 from top to bottom through the water inlet pipe 2 arranged at the center of the tank body 1, the reflecting plate 4 is arranged below the water inlet pipe 2 to ensure that the water is uniformly distributed in the tank body 1 and then slowly rises along the whole water passing section, suspended matters settle into the mud bucket at the bottom of the tank body 1, clarified water flows out from the periphery of the tank body 1 along the peripheral overflow groove 5, the edge of the overflow groove 5 is provided with the baffle and the scum groove to intercept scum to ensure the quality of the effluent water, the bottom of the tank body 1 is provided with the mud discharge pipe 7 to discharge the mud regularly.
The above embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A vertical flow type secondary sedimentation tank is characterized by comprising: the cell body, the cell body upper end is provided with the inlet tube, the delivery port of inlet tube be provided with the horn mouth, the horn mouth uncovered offer down, horn mouth play water lower extreme is provided with the reflecting plate, cell body upper end periphery be provided with the overflow launder, the overflow launder be connected with the outlet pipe, cell body bottom be provided with the mud pipe.
2. The vertical flow type secondary sedimentation tank as claimed in claim 1, wherein a longitudinal sectional shape of the tank body satisfies a deformed ellipse
Wherein H is the maximum height of the special-shaped ellipse, and W is the maximum width of the special-shaped ellipse.
3. The vertical flow type secondary sedimentation tank as claimed in claim 2, wherein the tank body is an inverted special-shaped ellipse, the position of the maximum width of the special-shaped ellipse is used as the free liquid surface of the tank body, the coordinate X of the maximum width of the special-shaped ellipse is H/e, e is a natural logarithm, and a rotating body of the special-shaped ellipse around the X axis at the part from the coordinate X to the H/e is used as the tank body.
4. A vertical flow secondary sedimentation tank as claimed in claim 1, wherein the water inlet pipe is provided at the center of the upper end of the tank body.
5. The vertical flow secondary sedimentation tank as claimed in claim 1, wherein the vertical distance between the reflection plate and the bell mouth is 0.3 m to 0.5 m.
6. A vertical flow secondary sedimentation tank as claimed in claim 1, wherein the reflection plate has an inverted V-shape, and an angle between the reflection plate and the horizontal direction is 15 ° to 20 °.
7. A vertical flow secondary sedimentation tank as claimed in claim 1, wherein the tank body is further connected with a flushing device.
8. A vertical flow secondary sedimentation tank as claimed in claim 1, wherein the sludge discharge pipe is provided with a pump outside the tank body.
9. A vertical flow secondary sedimentation tank as claimed in claim 1, wherein a baffle plate and a scum trough are provided at the edge of the overflow tank.
10. The vertical flow secondary sedimentation tank as claimed in claim 1, wherein the upper end of the tank body is higher than the bottom of the overflow tank by 0.3 to 0.5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120740386.5U CN216604163U (en) | 2021-04-12 | 2021-04-12 | Vertical flow type secondary sedimentation tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120740386.5U CN216604163U (en) | 2021-04-12 | 2021-04-12 | Vertical flow type secondary sedimentation tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216604163U true CN216604163U (en) | 2022-05-27 |
Family
ID=81681311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120740386.5U Active CN216604163U (en) | 2021-04-12 | 2021-04-12 | Vertical flow type secondary sedimentation tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216604163U (en) |
-
2021
- 2021-04-12 CN CN202120740386.5U patent/CN216604163U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107720959B (en) | Gas-liquid-solid three-phase separator | |
| CN211383924U (en) | Double-layer filler precipitation device | |
| CN111330317A (en) | Efficient sewage precipitation device and method | |
| CN208250006U (en) | A kind of high efficient aeration sedimentation integrated device | |
| CN216604163U (en) | Vertical flow type secondary sedimentation tank | |
| CN111097204A (en) | Mud scraper | |
| CN203408504U (en) | Vertical sedimentation basin | |
| CN206089096U (en) | Integrative equipment of air floatation precipitation | |
| CN209567956U (en) | A kind of livestock culture wastewater treatment equipment | |
| CN202379771U (en) | Multi-point air floatation polymer-containing sewage treatment device for shallow layer | |
| CN202951293U (en) | Defecator for treating desulfurization waste water | |
| CN106006812A (en) | Cavitation air flotation machine | |
| CN206198783U (en) | Vertical sedimentation basin | |
| CN109331506A (en) | Vertical sedimentation tank | |
| CN207324181U (en) | The high-effect central tube mechanism of perpendicular stream precipitator tower | |
| CN115608009A (en) | Assembled secondary sedimentation tank and sewage treatment equipment | |
| CN106380019B (en) | Novel water purifies device | |
| CN213221092U (en) | High-efficient whirl deposits water purifier | |
| CN209679570U (en) | A kind of vertical sedimentation tank | |
| CN108946988A (en) | A kind of double helix sedimentation basin suitable for the removing of rural area rainwash suspended matter | |
| CN212214692U (en) | Independent sludge sedimentation and reflux device | |
| CN209835843U (en) | Coagulation air-float copolymerization quick separation device | |
| CN205892792U (en) | Cavitation air -float machine | |
| CN2475727Y (en) | Airfloat sewage treatment device | |
| CN210048584U (en) | Advanced treatment device for high-fluorine wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |