CN111701326B - A mud-water separation device for sewage treatment - Google Patents
A mud-water separation device for sewage treatment Download PDFInfo
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- CN111701326B CN111701326B CN202010486086.9A CN202010486086A CN111701326B CN 111701326 B CN111701326 B CN 111701326B CN 202010486086 A CN202010486086 A CN 202010486086A CN 111701326 B CN111701326 B CN 111701326B
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- rotary
- filter cloth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/35—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition
- B01D33/37—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in parallel connection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/44—Regenerating the filter material in the filter
- B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
- B01D33/461—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element brushes
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- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention belongs to the technical field of sewage treatment, and discloses a sludge-water separation device for sewage treatment, which comprises a plurality of rotary filter cylinders uniformly distributed in concentric circles, wherein the cylinder bodies of the rotary filter cylinders are provided with water permeable holes and are wrapped with filter cloth; the bottom of the rotary filter cylinder is connected with a sewage collecting pipe through a rotary joint; the filter cloth is pressed against each other outside the rotary filter cylinder through two fixed pressing rubber rollers to realize the wrapping of the filter cloth on the rotary filter cylinder; the filter drum transmission motor drives the central drum to rotate, and the central drum drives each rotary filter drum to rotate through the filter cloth; and meanwhile, the filter cloth provides tension force by a filter cloth tensioning system. The invention changes the vertical filtration of the traditional mud-water separation device into horizontal filtration, can increase the filtration area and improve the filtration speed, thereby increasing the surface load of mud-water separation, reducing the occupied area, increasing the concentration of return sludge, improving the reaction rate of the biological reaction tank, reducing the tank body investment of the mud-water separation tank and the biological reaction tank, and being made into any shape to be more beneficial to combination and arrangement.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a device for separating mud and water behind a biological reaction tank of a sewage treatment plant.
Background
The pollutant discharge standard of domestic sewage treatment plants is higher and higher, the secondary discharge standard of the original municipal sewage treatment plant pollutant discharge standard (GB18918-2002) is improved to a primary B and a primary A, even the water pollutant comprehensive discharge standard (DB11/307-2013) of the local discharge standards of Beijing City, Tianjin City and the like, the municipal sewage treatment plant pollutant discharge standard (DB12/599-2015) and the like, and the discharge indexes of various pollutants tend to be strict, wherein the SS discharge standard is improved to 10mg/L from the original 20mg/L, even to 5mg/L of the local discharge standard.
In the process of improving the discharge standard, the sewage treatment process is upgraded from pretreatment, secondary treatment and sludge-water separation to a pretreatment, secondary treatment, sludge-water separation and coagulating sedimentation filtration process, and further developed to the current common pretreatment, secondary treatment, sludge-water separation, coagulating sedimentation and advanced oxidation + (denitrification) filtration process. However, the sludge-water separation after biological treatment has not changed in terms of tank type, sedimentation mode, design parameters and the like.
The traditional mud-water separation mode has the advantages of stable treatment effect, low energy consumption, convenient operation and management and the like under the current discharge standard. However, the method also exposes four inherent disadvantages of the existing sludge-water separation process: the solid-liquid separation surface load is low, the occupied area required by a single tank is large, and the civil engineering investment is large; the land utilization rate is further reduced by the combination of the circular sedimentation tank, and the rectangular sedimentation tank has certain advantages in the aspect of tank body combination, but has no disadvantage of large occupied area caused by low surface load by fundamentally changing. Secondly, because adopt the gravity mud mode of collection, mud need not subside, and general backward flow mud concentration is only 6000 ~ 8000mg/L, and backward flow mud concentration is low, needs a large amount of external reflux, increases the backward flow energy consumption on the one hand, reduces biological reaction pond efficiency on the one hand. Thirdly, sludge bulking is easy to occur. And fourthly, because the flow state of water in the pool body is of great importance, the water-mud separation is considered to be failure, so that a good water distribution channel and a hydraulic baffle are required to be arranged in the traditional water-mud separation.
With the improvement of the discharge standard, the processes of coagulating sedimentation, advanced oxidation + (denitrification) filtration and the like are added after the sludge-water separation process. The traditional sludge-water separation process is not a bang-bang process of a sewage treatment plant, and if a traditional sludge-water separation mode is adopted, the defect that the coagulation sedimentation effect is poor in a subsequent coagulation sedimentation section due to the fact that a few binders are used in the traditional sludge-water separation mode rather than the excessive pursuit of the sedimentation effect is highlighted, and the overall treatment effect of the process is affected is overcome.
In order to overcome the defects of the traditional sludge-water separation process, particularly to increase the concentration of returned sludge, membrane filtration separation is added on the basis of the traditional gravity separation in recent years. The sludge-water separation rate is high, the effluent SS is low, the occupied area is small, and the sludge concentration of the reaction tank is high. But the energy consumption in the membrane separation process is greatly increased, and simultaneously, in order to prevent membrane pollution, a large amount of blast aeration needs to be added, so that along with the backflow of sludge, a large amount of dissolved oxygen can be brought to the front end of the reaction tank, and the denitrification efficiency is reduced.
Disclosure of Invention
The invention aims to overcome the inherent defects of the traditional gravity sludge-water separation and membrane filtration separation, provides a sludge-water separation device for sewage treatment, organically combines the traditional gravity separation and filtration separation, adapts to the new discharge standard of the domestic sewage plant at present, and embodies a new technical concept.
In order to solve the technical problems, the invention is specifically realized by the following technical scheme:
a mud-water separation device for sewage treatment comprises a pool body, wherein a plurality of rotary filter cylinders are uniformly distributed in the pool body in a concentric circle mode, a water permeable hole is formed in the cylinder body of each rotary filter cylinder, and filter cloth covering the water permeable hole is wrapped outside each rotary filter cylinder; the bottom of each rotary filter cylinder is connected with a sewage collecting pipe through a rotary joint; the filter cloth is pressed against each other outside each rotary filter cylinder through two fixed pressing rubber rollers, so that the filter cloth wraps the rotary filter cylinders; a central cylinder is arranged among the rotary filter cylinders, the central cylinder is driven by a filter cylinder transmission motor to rotate, the filter cloth winds the outside of the central cylinder and sequentially and continuously winds around each rotary filter cylinder, and the central cylinder drives each rotary filter cylinder to rotate through the filter cloth; at the same time, the filter cloth is provided with a tensioning force by a filter cloth tensioning system.
Further, the cell body is provided with a water inlet pipeline and a water outlet main pipe, the water inlet pipeline is communicated with the inside of the cell body, and the water outlet main pipe is connected with the sewage collecting pipe.
Furthermore, overflow weirs are arranged around the tank body.
Furthermore, the top of the rotary filter cylinder is connected with a connecting seat bearing through a reinforcing rib plate.
Furthermore, the filter cloth tensioning system is composed of a tensioning spring, a tensioning swing arm, a tensioning rotating shaft and a tensioning rubber roll, wherein the tensioning force of the filter cloth is provided by the tensioning spring, the tensioning swing arm generates a moment and acts on the tensioning rotating shaft, and then the tensioning rubber roll transmits an acting force to the filter cloth to complete automatic tensioning of the filter cloth.
Further, a rotary brush is arranged between the rotary filter cylinders and acts on the surface of the filter cloth; and a spraying pipeline and a nozzle are arranged on the surface of the filter cloth in the inlet direction of the rotary brush.
Further, a sludge pump is arranged at the bottom of the tank body and used for discharging sludge.
The invention has the beneficial effects that:
according to the invention, through a unique filter drum filter cloth arrangement form, a transmission system, a filter cloth supporting system, a filter cloth tensioning system and a filter cloth cleaning system, the vertical filtration of the traditional mud-water separation device is changed into horizontal filtration, the filtration area can be increased, the filtration speed is increased, the surface load of mud-water separation is increased, at least half of the occupied area is reduced, the concentration of return sludge is increased, the reaction rate of a biological reaction tank is increased, the tank body investment of a mud-water separation tank and the biological reaction tank is reduced, a water distribution system is not required, and the filter drum filter cloth can be made into any shape to be more beneficial to combination and arrangement.
Drawings
FIG. 1 is an elevation view of a mud-water separating apparatus in an embodiment;
FIG. 2 is a plan view of the mud-water separating apparatus in the embodiment;
FIG. 3 is a plan view of a filter cloth tensioning system of the mud-water separating device in the embodiment;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a plan view of a filter cloth cleaning system of the mud-water separating apparatus in the embodiment;
fig. 6 is a sectional view taken along line B-B of fig. 5.
In the above figures: 1-water inlet pipeline, 2-overflow weir, 3-rotary filter cylinder, 4-filter cloth, 5-rotary joint, 6-sewage collecting pipe, 7-water outlet main pipe, 8-pressing rubber roller, 9-filter cylinder driving motor, 10-central cylinder, 11-tensioning spring, 12-tensioning swing arm, 13-tensioning rotary shaft, 14-tensioning rubber roller, 15-rotary brush, 16-brush driving motor, 17-chain wheel, 18-nozzle, 19-spraying pipeline and 20-sludge pump.
Detailed Description
The present invention is further described in detail below by way of specific examples, which will enable one skilled in the art to more fully understand the present invention, but which are not intended to limit the invention in any way.
As shown in fig. 1 and fig. 2, the present embodiment discloses a mud-water separation device for sewage treatment, which includes a tank body, the tank body is provided with a water inlet pipe 1 and a water outlet main pipe 7, the water inlet pipe 1 is used for conveying sewage to be subjected to mud-water separation into the tank body, and the water outlet main pipe 7 is used for discharging the treated sewage out of the tank body. And overflow weirs 2 are arranged around the tank body and used for enabling sewage conveyed by the water inlet pipeline 1 to uniformly flow into the tank body.
A plurality of same rotary filter cylinders 3 are arranged in the tank body, each rotary filter cylinder 3 is vertically arranged along the axis of the rotary filter cylinder, and the rotary filter cylinders 3 are uniformly distributed in a concentric circle in the horizontal direction. The barrel body of each rotary filter barrel 3 is fully provided with water permeable holes, the outside of the barrel body is wrapped with filter cloth 4, and the filter cloth 4 covers the water permeable holes comprehensively. The sludge and water separation is completed in the process that the sewage in the tank body passes through the filter cloth 4 and enters the rotary filter cylinder 3, the sludge is isolated on the filter cloth 4 outside the rotary filter cylinder 3, and the sewage enters the rotary filter cylinder 3.
The top of the rotary filter cylinder 3 is open and is positioned above the liquid level in the tank body, and the top of the rotary filter cylinder 3 is provided with a reinforcing rib plate and is connected with a connecting seat bearing above the tank body through the reinforcing rib plate. The bottom of the rotary filter cylinder 3 is provided with a necking part and is connected with a sewage collecting pipe 6 through a rotary joint 5, and sewage entering the rotary filter cylinder 3 is collected to the sewage collecting pipe 6 through the rotary joint 5. The sewage collecting pipe 6 is communicated with the water outlet main pipe 7, and the collected sewage is discharged out of the pool body through the water outlet main pipe 7.
All the rotary filter cylinders 3 are driven by the filter cloth 4 to rotate, and the filter cloth 4 is pressed against each other outside each rotary filter cylinder 3 through two fixed pressing rubber rollers 8, so that the filter cloth 4 wraps the rotary filter cylinders 3. A center cylinder 10 is provided at a central position between the plurality of rotary filter cartridges 3, the center cylinder 10 is connected to a filter cartridge driving motor 9, and the center cylinder 10 is driven by the filter cartridge driving motor 9 to continuously rotate. The entire circle of the filter cloth 4 is wound around the outside of the central cylinder 10 and sequentially passes around each of the rotary filter cartridges 3 in succession, and the filter cloth 4 transmits power to the respective rotary filter cartridges 3 by the rotation of the central cylinder 10.
As shown in fig. 3 and 4, the entire circle of filter cloth 4 is provided with a tension force by the filter cloth tension system, thereby ensuring the transmission and filtering effects. In this embodiment, the filter cloth tensioning system mainly comprises a tensioning spring 11, a tensioning swing arm 12, a tensioning rotating shaft 13, and a tensioning rubber roller 14. One end of a tensioning spring 11 is fixed on the support above the tank body, the other end of the tensioning spring is fixedly connected with one end of a tensioning swing arm 12, and the other end of the tensioning swing arm 12 is connected with a tensioning rubber roller 14 through a tensioning rotating shaft 13. The tension force of the filter cloth 4 is provided by a tension spring 11, a moment is generated through a tension swing arm 12 and acts on a tension rotating shaft 13, and then the acting force is transmitted to the filter cloth 4 through a tension rubber roller 14, so that the filter cloth 4 is automatically tensioned.
As shown in fig. 5 and 6, the mud-water separating apparatus of the present invention is further provided with a filter cloth cleaning system for cleaning the filter cloth 4 at any time. In this embodiment, the filter cloth cleaning system is composed of a brush cleaning device and a spraying device, and includes a rotary brush 15, a brush driving motor 16, a chain wheel 17, a nozzle 18, and a spraying pipeline 19. The rotary brushes 15 are arranged on the surface of the filter cloth 4 and clean sludge on the surface of the filter cloth 4, so that the sludge is stripped from the filter cloth 4. The top of the rotary brush 15 is connected with a brush transmission motor 16 through a chain wheel 17, the brush transmission motor 16 provides rotary power, and the rotary brush 15 rotates under the transmission action of the chain wheel 17 to finish the cleaning of the sludge on the surface of the filter cloth 4. Generally, rotary brushes 15 are provided in the path of the filter cloth 4 between the rotary filter cartridges 3, and the two rotary brushes 15 are driven by a brush driving motor 16 through a chain wheel 17. A plurality of nozzles 18 longitudinally arranged on a spray pipeline 19 are arranged at the inlet position of the rotary brush 15, and the cleaning effect is improved by spraying in advance before the rotary brush 15 cleans the filter cloth 4.
The sludge separated by the filter cloth 4 falls into the bottom of the tank body, the sludge is discharged from the tank body by a sludge pump 20 arranged at the bottom of the tank body, the residual sludge enters a sludge treatment system, and the rest returned sludge flows back to the biological reaction tank, so that the sludge-water separation is completed.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make various changes and modifications within the spirit and scope of the present invention without departing from the spirit and scope of the appended claims.
Claims (3)
1. A mud-water separation device for sewage treatment comprises a pool body and is characterized in that a plurality of rotary filter cylinders are uniformly distributed in the pool body in concentric circles, the cylinder body of each rotary filter cylinder is provided with a water permeable hole, and the outer part of each rotary filter cylinder is wrapped with filter cloth covering the water permeable hole; the bottom of the rotary filter cylinder is connected with a sewage collecting pipe through a rotary joint; the filter cloth is pressed against each other outside the rotary filter cylinder through two fixed pressing rubber rollers to wrap the rotary filter cylinder; a central cylinder is arranged among the rotary filter cylinders, the central cylinder is driven by a filter cylinder transmission motor to rotate, the filter cloth winds the outside of the central cylinder and sequentially and continuously winds around each rotary filter cylinder, and the central cylinder drives each rotary filter cylinder to rotate through the filter cloth; meanwhile, the filter cloth is provided with a tension force by a filter cloth tensioning system;
a rotary hairbrush is arranged between the rotary filter cylinders and acts on the surface of the filter cloth; a spraying pipeline and a nozzle are arranged on the surface of the filter cloth in the inlet direction of the rotary brush;
the tank body is provided with a water inlet pipeline and a water outlet main pipe, the water inlet pipeline is communicated with the inside of the tank body, and the water outlet main pipe is connected with the sewage collecting pipe;
an overflow weir is arranged around the tank body and used for enabling the sewage conveyed by the water inlet pipeline to uniformly flow into the tank body;
the bottom of the tank body is provided with a sludge pump for discharging sludge.
2. The mud-water separator for sewage treatment according to claim 1, wherein the top of the rotary filter cartridge is connected with an adapter bearing through a reinforcing rib plate.
3. The sludge-water separation device for sewage treatment according to claim 1, wherein the filter cloth tensioning system is composed of a tensioning spring, a tensioning swing arm, a tensioning rotary shaft and a tensioning rubber roll, the tensioning force of the filter cloth is provided by the tensioning spring, the tensioning swing arm generates torque and acts on the tensioning rotary shaft, and the tensioning rubber roll transmits acting force to the filter cloth to complete automatic tensioning of the filter cloth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010486086.9A CN111701326B (en) | 2020-06-01 | 2020-06-01 | A mud-water separation device for sewage treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010486086.9A CN111701326B (en) | 2020-06-01 | 2020-06-01 | A mud-water separation device for sewage treatment |
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| Publication Number | Publication Date |
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| CN111701326A CN111701326A (en) | 2020-09-25 |
| CN111701326B true CN111701326B (en) | 2021-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010486086.9A Active CN111701326B (en) | 2020-06-01 | 2020-06-01 | A mud-water separation device for sewage treatment |
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| GB419229A (en) * | 1933-07-05 | 1934-11-08 | Robert Bennet | Improvements in and relating to rotary filters |
| SE302235B (en) * | 1966-02-08 | 1968-07-08 | Svenska Flaektfabriken Ab | |
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| BE699664A (en) * | 1967-02-15 | 1967-11-16 | ||
| US4925576A (en) * | 1989-04-13 | 1990-05-15 | Itzhak Gotlieb | Continuous discharge centrifuge |
| NL9001170A (en) * | 1990-05-21 | 1991-12-16 | Pannevis Bv | METHOD AND APPARATUS FOR REMOVING LIQUID FROM A MIXTURE OF LIQUID AND SOLID |
| CN101274165A (en) * | 2008-04-11 | 2008-10-01 | 华章电气（桐乡）有限公司 | Band press filter overlapped with polyester net band |
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Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB419229A (en) * | 1933-07-05 | 1934-11-08 | Robert Bennet | Improvements in and relating to rotary filters |
| SE302235B (en) * | 1966-02-08 | 1968-07-08 | Svenska Flaektfabriken Ab | |
| DE4116476A1 (en) * | 1991-05-21 | 1992-11-26 | Nordischer Maschinenbau | SEPARATOR |
| EP0605018A2 (en) * | 1992-12-23 | 1994-07-06 | Passavant-Werke Ag | Installation for sludge dewatering |
| CN1320470A (en) * | 2001-01-15 | 2001-11-07 | 牛子久 | Rotation-type filter method for well-drilling fluid and 4 special devices for implementing it |
| JP2002011172A (en) * | 2001-06-08 | 2002-01-15 | Sanyo Product Co Ltd | Pattern varying display device in game machine |
| CN102600657A (en) * | 2010-12-06 | 2012-07-25 | 张鑫珩 | Drum microfiltration machine |
| CN103495316A (en) * | 2013-10-15 | 2014-01-08 | 上海沃森环保科技有限公司 | Automatic sticky dust filtering device |
| CN205182324U (en) * | 2015-11-11 | 2016-04-27 | 江苏环信机械工程有限公司 | Solid liquid separator |
| CN108671613A (en) * | 2018-07-13 | 2018-10-19 | 江苏亚峰科技集团有限公司 | A kind of rotating drum vacuum filtration formula water supply industry wastewater treatment equipment |
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Address after: 300051 No. 239, Yingkou Road, Heping District, Tianjin Patentee after: Tianjin municipal engineering design and Research Institute Co.,Ltd. Address before: 300051 No. 239, Yingkou Road, Heping District, Tianjin Patentee before: TIANJIN MUNICIPAL ENGINEERING DESIGN & Research Institute |
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