CN217367276U - Vertical flow sedimentation tank - Google Patents
Vertical flow sedimentation tank Download PDFInfo
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- CN217367276U CN217367276U CN202221142675.6U CN202221142675U CN217367276U CN 217367276 U CN217367276 U CN 217367276U CN 202221142675 U CN202221142675 U CN 202221142675U CN 217367276 U CN217367276 U CN 217367276U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The utility model relates to a vertical flow sedimentation tank, which comprises a tank body, a water inlet device, a water outlet device, a mud guard, a mud bucket, a mud discharging device and an emptying pipe, wherein the water inlet device comprises a water inlet pipe, a central cylinder, a horn mouth and a reflecting plate; the water outlet device comprises a water outlet weir and a water outlet hole; the sludge discharge device comprises a sludge suction port, a sludge suction pipe, a vertical sludge discharge pipe, a sludge return pipe, a residual sludge discharge pipe and an air inlet pipe. The sedimentation tank reduces dead zones at the bottom of the mud bucket by arranging the mud suction pipes arranged along the periphery of the mud bucket and the multipoint mud suction ports staggered on the mud suction pipes at the bottom of the tank body, and can discharge mud and carry out air-jet backwashing on the mud suction ports by adopting the air stripping assembly so as to prevent the mud suction ports from being blocked; in addition, the movable water outlet weir and the mud guard are arranged on the upper part of the pool body, so that the uniform water outlet of the weir mouth can be ensured, the floating mud can be effectively prevented from flowing out of the sedimentation tank along with the water flow, and the effluent sense and the water quality can be ensured. The whole sedimentation tank needs less electromechanical equipment, has low energy consumption, simple operation and easy maintenance.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment device, a vertical sedimentation tank is related to.
Background
In a sewage treatment system, a sedimentation tank after biological treatment is generally called a secondary sedimentation tank, in the secondary sedimentation tank, sludge-water mixed liquor is separated under the action of gravity, has low water density and flows out from an upper effluent weir; the sludge naturally falls into a lower sludge hopper for concentration due to high density, part of the concentrated sludge flows back to the biological treatment section, the circulation of microorganisms is realized, and part of the concentrated sludge is used as residual sludge to be discharged out of the system.
The vertical sedimentation tank has the characteristics of no mechanical sludge scraping equipment, convenience in sludge discharge, simplicity in management and small occupied area, and is widely applied to small sewage treatment plants (stations) in villages and small towns. The village and town sewage treatment station has small scale, limited investment and short construction period, the height of the sedimentation tank is often limited due to the limitation of the excavation depth or the transportation height, and under the condition of limiting the height of the sedimentation tank, in order to ensure the sufficient sludge discharge, one method is to arrange a plurality of sludge hoppers at the bottom, so the method has high cost, and the operation of sludge backflow and sludge discharge is complicated, or a sludge pump and an air compressor are arranged, and the sludge pump and the air compressor are arrangedA plurality of electromechanical devices such as a water backwashing system and a gas backwashing system have large workload and energy consumption for equipment maintenance; if only one mud bucket is arranged, the area of the mud bucket is large, dead zones exist, mud is discharged insufficiently, and residual mud not only occupies the tank capacity in the sedimentation tank, but also can generate N through denitrification reaction due to oxygen deficiency 2 ，N 2 The overflow process can carry sludge to float upwards, so that more floating sludge is in the effluent, and the effluent sense and the water quality are poor. In addition, due to the difference of the technical level of field construction, the horizontal precision of a foundation or a bottom plate is difficult to meet the design requirement, and the problem of uneven water outlet of a weir crest easily occurs.
Therefore, a sedimentation tank which can simultaneously solve the problems of sufficient sludge discharge, removal of floating sludge in the effluent, uneven weir crest effluent and the like is urgently needed.
Disclosure of Invention
An object of the utility model is to prior art not enough, provide a vertical flow formula sedimentation tank, adopt the multiple spot to inhale mud mouth and combine the air stripping to realize fully arranging mud to effectively reduce and float mud, guarantee play water sense organ and quality of water, and required electromechanical device is few, and the energy consumption is low.
The utility model adopts the technical scheme as follows:
a vertical flow sedimentation tank comprises a tank body, a water inlet device, a water outlet device, a mud guard, a mud bucket, a mud discharging device and an emptying pipe.
The water inlet device comprises a water inlet pipe, a central cylinder, a bell mouth and a reflecting plate; the water outlet device comprises a fixed water outlet weir, a movable water outlet weir and a water outlet hole; the sludge discharge device comprises a sludge suction port, a sludge suction pipe, a vertical sludge discharge pipe, a sludge return pipe, a residual sludge discharge pipe and an air inlet pipe.
The water inlet pipe is positioned at the middle upper part of the tank body, the central cylinder, the bell mouth and the reflecting plate are coaxially arranged in the center of the tank body from top to bottom, and the water inlet pipe is communicated with the central cylinder; the sludge hopper is positioned at the bottom of the tank body, the sludge suction pipes are arranged in the peripheral direction of the bottom of the sludge hopper and are connected with the vertical sludge discharge pipes, the vertical sludge discharge pipes are divided into two paths at the upper part of the tank body, one path is a sludge return pipe, the other path is a residual sludge discharge pipe, and valves are arranged on the sludge return pipe and the residual sludge discharge pipe; one end of the air inlet pipe extends into the lower part of the tank body and is connected with a vertical sludge discharge pipe, the other end of the air inlet pipe is connected with a main air pipe, and a plurality of sludge suction ports are formed in the sludge suction pipe along the two sides of the pipe in a staggered manner; the water outlet weir is arranged on the upper portion of the tank body along the peripheral direction in the tank, the water outlet hole is formed in the wall surface of the tank body, the hole bottom is not lower than the water outlet weir bottom, one end of the emptying pipe is located inside the mud bucket, and one end of the emptying pipe extends out of the tank body and is provided with a valve.
In the above technical solution, further, the effluent weir includes a fixed effluent weir and a movable effluent weir, the fixed effluent weir and the movable effluent weir are disposed on the upper portion of the tank body and arranged along the circumferential direction in the tank, the fixed effluent weir is a flat plate weir, provided with a circular hole and connected to the tank body, the movable effluent weir is a tooth-shaped weir, provided with a long waist hole, the diameter of the circular hole is equal to the width of the long waist hole and connected by a bolt, so that the movable effluent weir and the fixed effluent weir are tightly connected to form the effluent weir of the sedimentation tank, the height of the movable effluent weir relative to the fixed effluent weir can be adjusted and controlled by the position of the bolt in the long waist hole, and the problem of uneven water outlet at the effluent weir port can be effectively solved by the arrangement of the fixed effluent weir and the movable effluent weir;
furthermore, the hole bottom of the water outlet hole is flush with the bottom of the water outlet weir, and the hole top is lower than the top of the water outlet weir.
Furthermore, the mud guard is arranged on the inner side of the effluent weir along the peripheral direction of the tank body, the top of the mud guard is higher than the top of the effluent weir, and the bottom of the mud guard is higher than the bottom of the effluent weir, so that floating mud can be effectively blocked, and the effluent quality is guaranteed;
furthermore, the sludge suction port is obliquely arranged at the bottom of the tank, and an oblique angle formed by the sludge suction port and the vertical surface is 45-60 degrees.
The beneficial effects of the utility model reside in that:
the vertical flow sedimentation tank of the utility model reduces the dead zone at the bottom of the mud bucket by arranging the mud sucking pipes arranged around the mud bucket and the multipoint mud sucking ports staggered on the mud sucking pipes at the bottom of the tank body, and can discharge mud and carry out air-blast backwashing on the mud sucking ports by adopting the air stripping component, thereby preventing the mud sucking ports from being blocked; in addition, the movable water outlet weir and the mud guard are arranged on the upper part of the pool body, so that levelness of the water outlet weir can be adjusted immediately, the uniform water outlet of a weir port is ensured, floating mud can be effectively prevented from flowing out of the sedimentation tank along with water flow, and the sense and the water quality of the water outlet are ensured.
Drawings
FIG. 1: the utility model discloses in a concrete example structure plan view
FIG. 2: section A-A of FIG. 1
FIG. 3: section B-B of FIG. 1
FIG. 4 is a schematic view of: structure schematic diagram of movable water outlet weir and fixed water outlet weir
FIG. 5: mounting schematic diagram of water outlet weir and mudguard
FIG. 6: installation schematic diagram of mud suction port
Description of the drawings: 1-a sedimentation tank body, 2-a fixed effluent weir, 3-a movable effluent weir, 4-a fender, 5-a bolt, 6-a mud bucket, 7-a water inlet pipe, 8-a water outlet hole, 9-an air inlet pipe, 10-an emptying pipe, 11-a mud suction pipe, 111-a mud return pipe, 112-a residual mud discharge pipe, 12-a mud suction port, 13-a central cylinder, 14-a bell mouth and 15-a reflecting plate.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more clearly understood, the following description is given for further details of the present invention with reference to the accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention, and are not intended to limit the present invention.
As shown in fig. 1-3, for a specific implementation manner of the vertical sedimentation tank provided by the present invention, the vertical sedimentation tank includes a tank body 1, a water inlet device, a water outlet device, a mud guard 4, a mud bucket 6, a mud discharging device and an emptying pipe 10. The water inlet device comprises a water inlet pipe 7, a central cylinder 13, a bell mouth 14 and a reflecting plate 15; the water outlet device comprises a fixed water outlet weir 2, a movable water outlet weir 3 and a water outlet hole 8; the sludge discharge device comprises a sludge suction port 12, a sludge suction pipe 11, a vertical sludge discharge pipe, a sludge return pipe 111, a residual sludge discharge pipe 112 and an air inlet pipe 9.
The water inlet pipe 7 is positioned at the middle upper part of the tank body 1, one end of the water inlet pipe is communicated with the upper part of the central cylinder 13, and the other end of the water inlet pipe is communicated with the front-end treatment tank; the central cylinder 13, the bell mouth 14 and the reflecting plate 15 are coaxially positioned in the center of the pool body 1, the central cylinder 13 is connected with the bell mouth 14 and positioned above the bell mouth 14, and the reflecting plate 15 is positioned below the bell mouth 14. The mud bucket 6 is positioned at the bottom of the tank body 1, and the included angle between the wall surface of the mud bucket 6 and the horizontal direction is 55-60 degrees. The water outlet device is positioned at the upper part of the tank body 1, the fixed water outlet weir 2 and the movable water outlet weir 3 form a water outlet weir, the water outlet weir is arranged at the upper part of the tank body 1 along the peripheral direction in the tank, the water outlet hole 8 is formed in the wall surface of the tank body 1, and the hole bottom is not lower than the water outlet weir bottom;
the muddy water mixed liquid enters the central cylinder 13 from the water inlet pipe 7, the central cylinder 13 has a steady flow, then the water flow speed is reduced through the bell mouth 14, the muddy water is uniformly dispersed around and slowly flows upwards after passing through the lower reflecting plate 15, and the clarified sewage overflows to the weir trough through the water outlet weir, and then flows out of the pool body 1 through the water outlet hole 8. The suspended matters sink into the mud bucket 6 due to the gravity action, thereby realizing mud-water separation.
As shown in fig. 1 and 4, the fixed effluent weir 2 and the movable effluent weir 3 are arranged in the periphery of the pool, the fixed effluent weir 2 is a flat plate weir, is provided with a circular hole and is connected with the pool body 1, the movable effluent weir 3 is a tooth-shaped weir, is provided with a long waist hole and is tightly connected with the fixed effluent weir 2, and the diameter of the circular hole on the fixed effluent weir 2 is equal to the width of the long waist hole on the movable effluent weir 3 and is connected with the long waist hole through a bolt. When the water outlet of each water outlet weir port is uneven, the height of the movable water outlet weir is adjusted, and the horizontal precision is adjusted to ensure that the water outlet is even. The 8 hole bottoms of apopore flush with the play weir bottom, and the hole top is less than play weir top, can prevent weir groove ponding long-pending mud, prevents that the sedimentation tank from going out the water and not overflowing through a play weir and directly flowing out cell body 1, and the sense organ of play water is good.
As shown in figure 5, the mudguard 4 is positioned at the upper part of the tank body 1 and arranged in the peripheral direction of the inner side of the effluent weir, the top part is higher than the top part of the effluent weir, and the bottom part is higher than the bottom part of the effluent weir. As the mud bucket 6 is arranged at the central position of the bottom of the tank body 1, N generated by denitrification of the mud 2 The floating sludge brought out in the escaping process is concentrated in the middle position of the upper part of the tank body 1, namely the inner side of the mudguard 4, and the water flows out from the mudguard 4 to the water outlet weir, so that the mudguard 4 can effectively prevent the floating sludge from flowing out of the tank body 1 along with the water flow to influence the water quality of the outlet water.
As shown in fig. 1, 2, 3 and 6, the sludge discharge device comprises a plurality of sludge suction ports 12, a sludge suction pipe 11, a sludge return pipe 111, a residual sludge discharge pipe 112 and an air inlet pipe 9, wherein the sludge suction ports 12 are staggered along two sides of the sludge suction pipe 11, the sludge suction ports 12 are inclined to the bottom of the tank, and the inclined angle is 45-60 degrees (the included angle with the vertical plane); the sludge suction pipe 11 is arranged at the bottom of the sludge hopper 6 and arranged around the periphery of the sludge hopper 6, the sludge suction pipe 11 is connected with a vertical sludge discharge pipe, the vertical sludge discharge pipe is divided into two paths at the upper part of the tank body 1, one path is a sludge return pipe 111, the other path is a residual sludge discharge pipe 112, and valves are arranged on the sludge return pipe 111 and the residual sludge discharge pipe 112; one end of the air inlet pipe 9 is connected with a vertical pipe which extends into the lower part of the tank body 1 and is connected with a sludge discharge vertical pipe, and the other end of the air inlet pipe is connected with a main air pipe. Because gas is introduced into the sludge suction pipe 11, the density is low, sludge sucked by the sludge suction port 12 enters the sludge suction pipe 11 and then flows to the direction with low density, so that sludge is discharged to the upper part of the tank body 1 by gas stripping, sludge backflow and residual sludge discharge are carried out at the upper part, one end of the sludge backflow pipe 111 is communicated with the front-end treatment tank, the sludge is refluxed into the front-end treatment tank, and the recycling of microorganisms is realized; one end of the excess sludge discharge pipe 112 is communicated with a sludge storage tank, excess sludge is discharged out of the sewage treatment system, and TP pollutants in sewage are removed;
the scheme of the utility model is that the mud sucking pipes are arranged along the peripheral direction of the bottom of the annular mud bucket, the vertical mud discharging pipes and the air inlet pipe are arranged, and a plurality of mud sucking ports which are arranged along the mud sucking pipes in a staggered way are combined, so that the dead zone at the bottom of the mud bucket is reduced, full mud discharging is realized, the mud sucking ports are arranged obliquely downwards, the suction of the mud is facilitated, and if the mud is blocked, gas scouring can be formed to facilitate discharging of sundries from the mud sucking pipes; when the sludge discharging device normally operates, the valve on the sludge return pipe is normally opened, and the valve on the residual sludge discharging pipe is opened when sludge is required to be discharged, and can also be normally opened; if the sludge suction port is blocked and the sludge discharge efficiency is reduced, the valves on the sludge return pipe and the residual sludge discharge pipe are closed, the gas introduced into the sludge suction pipe flushes the sludge suction port, and impurities are discharged from the sludge suction pipe to recover the sludge suction function. The floating of the floating mud can be effectively reduced by fully discharging the mud, and the sense of effluent and the water quality are further ensured. The whole sedimentation tank needs less electromechanical equipment, has low energy consumption and low gas demand for gas stripping and sludge discharge, does not need a special fan, and can share the fan with the aeration of the front-end aerobic tank; the operation is simple and the maintenance is easy.
Claims (5)
1. A vertical flow sedimentation tank is characterized by comprising a tank body, a water inlet device, a water outlet device, a mud guard, a mud bucket, a mud discharging device and an emptying pipe;
the water inlet device comprises a water inlet pipe, a central cylinder, a bell mouth and a reflecting plate; the water outlet device comprises a water outlet weir and a water outlet hole; the sludge discharge device comprises a plurality of sludge suction ports, a sludge suction pipe, a vertical sludge discharge pipe, a sludge return pipe, a residual sludge discharge pipe and an air inlet pipe;
the water inlet pipe is positioned at the middle upper part of the tank body, the central cylinder, the bell mouth and the reflecting plate are coaxially arranged in the center of the tank body from top to bottom, and the water inlet pipe is communicated with the central cylinder; the sludge hopper is positioned at the bottom of the tank body, the sludge suction pipes are arranged in the peripheral direction of the bottom of the sludge hopper and are connected with the vertical sludge discharge pipes, the vertical sludge discharge pipes are divided into two paths at the upper part of the tank body, one path is a sludge return pipe, the other path is a residual sludge discharge pipe, and valves are arranged on the sludge return pipe and the residual sludge discharge pipe; one end of the air inlet pipe extends into the lower part of the tank body and is connected with a vertical sludge discharge pipe, the other end of the air inlet pipe is connected with a main air pipe, and a plurality of sludge suction ports are formed in the sludge suction pipe along the two sides of the pipe in a staggered manner; the water outlet weir is arranged on the upper portion of the tank body along the peripheral direction in the tank, the water outlet hole is formed in the wall surface of the tank body, the hole bottom is not lower than the water outlet weir bottom, one end of the emptying pipe is located inside the mud bucket, and one end of the emptying pipe extends out of the tank body and is provided with a valve.
2. The vertical sedimentation tank as claimed in claim 1, wherein the effluent weir comprises a fixed effluent weir and a movable effluent weir, the fixed effluent weir is a flat plate weir formed with a circular hole and connected to the tank body, the movable effluent weir is a tooth-shaped weir formed with a long waist hole, and the circular hole has a diameter equal to the width of the long waist hole and is connected by a bolt so that the movable effluent weir is tightly connected to the fixed effluent weir.
3. A vertical sedimentation tank as claimed in claim 2, wherein the outlet floor is flush with the weir floor and the roof is lower than the weir roof.
4. A vertical sedimentation tank according to claim 2, wherein the fender is located inside the weir along the circumferential direction of the tank body, the top of the fender is higher than the top of the weir, and the bottom of the fender is higher than the bottom of the weir.
5. The vertical flow sedimentation tank of claim 1, wherein the sludge suction port is inclined to the tank bottom, and an inclined angle formed between the sludge suction port and a vertical plane is 45-60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221142675.6U CN217367276U (en) | 2022-05-12 | 2022-05-12 | Vertical flow sedimentation tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221142675.6U CN217367276U (en) | 2022-05-12 | 2022-05-12 | Vertical flow sedimentation tank |
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| Publication Number | Publication Date |
|---|---|
| CN217367276U true CN217367276U (en) | 2022-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221142675.6U Active CN217367276U (en) | 2022-05-12 | 2022-05-12 | Vertical flow sedimentation tank |
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| CN (1) | CN217367276U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117585743A (en) * | 2024-01-18 | 2024-02-23 | 浙江浙达水业有限公司 | Sewage treatment regulating tank and regulating method |
-
2022
- 2022-05-12 CN CN202221142675.6U patent/CN217367276U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117585743A (en) * | 2024-01-18 | 2024-02-23 | 浙江浙达水业有限公司 | Sewage treatment regulating tank and regulating method |
| CN117585743B (en) * | 2024-01-18 | 2024-04-16 | 浙江浙达水业有限公司 | Sewage treatment regulating tank and regulating method |
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| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 310020 room 1901, building 3, Mixc, Jianggan District, Hangzhou City, Zhejiang Province Patentee after: Zhejiang Zheda Water Industry Co.,Ltd. Address before: 310020 room 1901, building 3, Mixc, Jianggan District, Hangzhou City, Zhejiang Province Patentee before: ZHEJIANG UNIVERSITY WATER CO.,LTD. |
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| CP01 | Change in the name or title of a patent holder |