CN210505737U - Membrane pool structure of membrane bioreactor - Google Patents
Membrane pool structure of membrane bioreactor Download PDFInfo
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- CN210505737U CN210505737U CN201920709172.4U CN201920709172U CN210505737U CN 210505737 U CN210505737 U CN 210505737U CN 201920709172 U CN201920709172 U CN 201920709172U CN 210505737 U CN210505737 U CN 210505737U
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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
Abstract
The utility model provides a membrane bioreactor membrane pond structure. The method mainly comprises the following steps: the sludge concentration of the upper tank interval is lower than that of the lower tank interval from top to bottom; a plurality of MBR membrane pieces are arranged in the upper tank area, and sludge after membrane reaction treatment in the upper tank area is transmitted to the middle tank area; a sludge separation part is arranged in the middle tank section, and the sludge separated and treated in the middle tank section is transmitted to the lower tank section; and a sludge settling part and a backflow sludge discharge pipe are arranged in the lower tank interval, and the backflow sludge discharge pipe performs backflow on the sludge after the sludge settling part is settled. The utility model discloses a MBR membrane cisterna structure is through forming the low sludge concentration district on upper strata in the longitudinal direction of membrane cisterna, and the high sludge concentration district of middle level disengagement zone and lower floor, and makes MBR membrane group ware be in the low sludge concentration region in upper strata, is favorable to alleviateing membrane pollution rate, is showing reinforced membrane pollution control effect.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to an MBR (Membrane Bio-Reactor) Membrane pool structure.
Background
MBR is a novel water treatment technology which combines a membrane separation tank interval and a biological treatment tank interval in the fields of sewage treatment and water resource recycling. In recent years, with the improvement of water treatment discharge standard and the perfect development of MBR technology, MBR has been applied in large scale, and market share has been rapidly developed, so that MBR becomes a main and effective treatment technology for municipal domestic sewage and industrial wastewater treatment at present.
The MBR membrane tank is used for retaining microorganisms in water in the MBR membrane reactor through an efficient membrane separation technology, and meanwhile, nitrification and denitrification can be carried out, so that the denitrification effect is good. The quality of the treated effluent can exceed the national class A standard, the biological safety is high, the effluent can be completely recycled, and the effluent is stable.
The conventional MBR technology often generates membrane pollution in the application process, the membrane pollution is controlled by adopting an aeration mode in the traditional method, but a large amount of aeration can increase the water treatment cost, hair can be blocked at the root of a membrane component to a certain degree, the membrane component needs to be cleaned on line and off line regularly, and a large amount of labor cost and time are consumed. There is therefore an urgent need to find a way to effectively control MBR membrane fouling without consuming energy.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a MBR membrane tank structure to overcome prior art's problem.
In order to achieve the purpose, the utility model adopts the following technical scheme.
The utility model provides a following scheme:
a membrane bioreactor membrane basin structure comprising: the system comprises an upper tank interval (1), a middle tank interval (2) and a lower tank interval (3), wherein the sludge concentration of the upper tank interval (1) is lower than that of the lower tank interval (3);
a plurality of MBR membrane pieces (4) are arranged in the upper tank interval, sludge after membrane reaction treatment in the upper tank interval (1) is transmitted to the middle tank interval (2), the sludge separation part comprises a plurality of inclined pipes or inclined plates (5) which are obliquely arranged, and a plurality of water distribution pipes (6) are arranged below the inclined pipes or inclined plates (5);
a sludge separation part is arranged in the middle tank section (2), and the sludge separated and treated in the middle tank section (2) is transmitted to the lower tank section (3);
and a sludge settling part (7) and a backflow sludge discharge pipe (8) are arranged in the lower tank interval, and the backflow sludge discharge pipe (8) is used for refluxing the sludge settled by the sludge settling part (7).
Preferably, the height ratio of the upper tank interval (1) to the middle tank interval (2) is: 1.1:1-5:1, the height ratio of the middle pool interval (2) to the lower pool interval (3) is as follows: 0.3:1-1.8:1.
Preferably, the height of the upper pool section (1) is 3000mm and 1000mm, the height of the middle pool section (2) is 900mm and 600 mm, and the height of the lower pool section (3) is 2000mm and 500 mm.
Preferably, the MBR membrane group device is suspended and fixed on the wall of the tank or suspended in the middle of the tank body in a hanging beam mode, a certain number of curtain type MBR membrane modules are fixed in each MBR membrane group device, and a plurality of MBR membrane modules are arranged and fixed at the bottom of the MBR membrane group device in an inserting mode in a file box manner.
Preferably, the fixing mode of the MBR membrane module comprises bolt connection, plug insertion or beam extrusion.
Preferably, the length of the inclined tube or the inclined plate is 900-1200mm, the inclination angle of the inclined tube or the inclined plate is 30-80 degrees, and the tube diameter of the inclined tube or the distance between the inclined plates is 80-100 mm.
Preferably, the sludge settling part (7) in the lower tank section (3) is connected with the bottom of the middle tank section (2), the return sludge discharge pipe (8) is arranged at the lower part of the sludge settling part (7), the lower tank section (3) is a settling area and is of an inverted trapezoidal structure as a whole, and the height of the lower tank section (3) is 500-2000 mm.
Preferably, the sludge settling part (7) is of a hollow inverted trapezoidal structure, and an included angle between oblique sides at two sides of the inverted trapezoidal structure and the bottom plane of the middle pool interval (2) is 10-80 degrees.
Preferably, the diameter or the width of the backflow sludge discharge pipe (8) is more than or equal to 200mm, the ratio of the diameter or the width of the backflow sludge discharge pipe (8) to the width of the lower bottom surface of the lower pool section (3) is 1:1-1:10, and the slope of the bottom slope of the lower pool section (3) to the upper edge of the backflow sludge discharge pipe (8) is more than or equal to 0.02.
According to the technical scheme provided by the embodiment of the utility model, the MBR membrane pool structure of the utility model has the advantages that the low sludge concentration area on the upper layer, the middle separation area and the high sludge concentration area on the lower layer are formed in the longitudinal direction of the membrane pool, and the MBR membrane group device is positioned in the low sludge concentration area on the upper layer, thereby being beneficial to reducing the membrane pollution rate, obviously enhancing the membrane pollution control effect and increasing the long-term stability of the operation of the MBR membrane system; and the return pipeline of the system is arranged in a lower-layer high-sludge concentration area, so that the return ratio can be reduced and the return energy consumption can be reduced under the condition of achieving the same return effect.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a front view of an MBR membrane tank structure according to an embodiment of the present invention;
fig. 2 is a side view of an MBR membrane tank structure according to an embodiment of the present invention.
In the figure, an upper tank interval 1, a middle tank interval 2, a lower tank interval 3, an MBR membrane 4, an inclined pipe or an inclined plate 5, a water distribution pipe 6, a sludge settling part 7 and a backflow sludge discharge pipe 8.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
For the convenience of understanding the embodiments of the present invention, the following description will be given by way of example only with reference to the accompanying drawings, and the embodiments are not limited thereto.
The embodiment of the utility model provides a controllable MBR membrane cisterna structure of mud layering, this MBR membrane cisterna structure is according to hydraulics and mud settlement principle, through ingenious calculation and design, make full use of mud divides the layering phenomenon in the membrane cisterna, guide to the advantage of the tendency, form the high sludge concentration district of upper low sludge concentration district, middle level separation district and lower floor in the longitudinal direction of membrane cisterna, and make the membrane system be in the upper low sludge concentration region, be favorable to alleviateing membrane pollution rate, show enhancement membrane pollution control effect, the long-term stability of membrane system operation has been increased; and the backflow pipeline is arranged in a lower-layer high-sludge concentration area, so that the backflow ratio can be reduced and the backflow energy consumption is reduced under the condition of achieving the same backflow effect.
The embodiment of the utility model provides a MBR membrane cisterna structure's elevation view is shown in FIG. 1, and the side view is shown in FIG. 2, and this MBR membrane cisterna has three layer construction, including the upper portion pond interval 1 of vertical direction from the top down, middle pond interval 2 and lower part pond interval 3. Set up a plurality of MBR membrane pieces 4 in the interval 1 of upper portion pond, the mud after the interval 1 membrane reaction of upper portion pond is handled transmits to interval 2 of middle pond sets up the mud separation part in the interval 2 of middle pond, and the mud after the interval 2 separation of middle pond transmits to interval 3 of lower part pond, sets up mud sedimentation part 7 and backward flow mud pipe 8 in the interval 3 of lower part pond, and backward flow mud pipe 8 is with the mud that mud sedimentation part 7 subsided the processing and is refluxed.
The upper tank section 1 is a low sludge concentration area, the height of the low sludge concentration area can be 1000-3000mm, and the sludge concentration range is 1000-5000 mg/L. The middle tank section 2 is a sludge separation area, and the height range can be 600-900 mm. The lower pool zone 3 is a high sludge concentration zone which is also a sedimentation zone, the height range of the sedimentation zone is 500-2000mm, and the sludge concentration range is 5000-50000 mg/L.
In practical application, the height ratio of the upper tank interval 1 to the middle tank interval 2 is as follows: 1.1:1-5:1, the height ratio of the middle pool interval 2 to the lower pool interval 3 is: 0.3:1-1.8:1.
It will be understood by those skilled in the art that the above-mentioned ranges of heights and height ratios of the upper tank section 1, the middle tank section 2 and the lower tank section 3 are merely examples, and other ranges of heights and heights that are currently available or may be later developed, such as may be suitable for use in embodiments of the present invention, are also included within the scope of the present invention and are herein incorporated by reference.
Every MBR membrane module 4 in above-mentioned upper portion pond interval 1 all places perpendicularly in mud, MBR membrane group ware can be through hanging, be fixed in the pool wall or hang in the middle of the cell body through the hanging beam mode, be fixed with the curtain formula MBR membrane module of a certain quantity in every MBR membrane group ware, every MBR membrane module is similar to a file box, a plurality of MBR membrane modules are arranged the bottom of bayonet fixing at MBR membrane group ware with a file box, the fixed mode can be bolted connection, bolt grafting, the crossbeam extrudees etc. and is fixed in MBR membrane group ware, its purpose prevents in reciprocating vibration in-process, produce relative motion between MBR membrane module and the MBR membrane group ware, and then influence the stability of MBR membrane group ware.
The sludge separation part in the middle tank interval 2 comprises a plurality of inclined pipes or inclined plates 5 which are obliquely arranged, and a plurality of water distribution pipes 6 are arranged below the inclined pipes or inclined plates 5. The pipe or plate 5 fills the entire intermediate tank space 2. Firstly, according to the engineering requirements, the temporary storage area is determinedVelocity of boundary sink u0The critical sedimentation velocity u is determined according to the required sedimentation efficiency and sludge property0. From the critical sinking velocity u0And the relevant parameters of the inclined tube or the inclined plate can be deduced. Illustratively, the length of each inclined tube or inclined plate is 900-1200mm, the inclination angle of the inclined tube or inclined plate is 30-80 degrees, and the tube diameter of the inclined tube or the distance between the inclined plates is 80-100 mm. Wherein, the optimal parameter range of the inclined tube or the inclined plate is as follows: the length of the inclined tube or the inclined plate is 900-1000mm, and the inclination angle of the inclined tube or the inclined plate is 40-60 degrees.
In order to distribute water uniformly and not disturb the settled sludge, a water distribution pipe is arranged below the inclined pipe or the inclined plate.
The lower tank interval 3 comprises a sludge settling part 7 and a backflow sludge discharge pipe 8, the sludge settling part 7 is connected with the bottom of the middle tank interval 2, and the backflow sludge discharge pipe 8 is arranged on the lower portion of the sludge settling part. The lower tank section 3 is a high sludge concentration area and is also a sedimentation area, the whole sedimentation area is of an inverted trapezoidal structure, the height of the sedimentation area is 500-2000mm, and the sludge sedimentation part 7 is used for receiving the sludge settled from the middle tank section 2 and settling the sludge to the backflow sludge discharge pipe 8. The sludge settling part 7 is of a hollow inverted trapezoidal structure, and the inverted trapezoidal structure is more favorable for settling sludge. The included angle between the inclined sides at the two sides of the inverted trapezoidal structure and the bottom plane of the middle pool interval 2 is 10-80 degrees.
The diameter or the width of the backflow sludge discharge pipe 8 is more than or equal to 200mm, the ratio of the width or the diameter of the backflow sludge discharge pipe to the width of the lower bottom surface of the lower pool section 3 is 1:1-1:10, and the gradient of the bottom slope of the lower pool section 3 to the upper edge of the backflow sludge discharge pipe 8 is more than or equal to 0.02. With such a structure, the sludge concentration in the lower tank zone 3 can be set to 5000-50000 mg/L.
The backflow sludge discharge pipe 7 has the function of directly returning the high-concentration settled sludge to the front-end biochemical tank or facilitating collection, and the backflow ratio is controlled to be 20-200%. The sludge concentration in the sedimentation zone can be kept relatively stable through sludge backflow, the flow of the backflow pump can be reduced, the sludge concentration of the front end biochemical pool can be improved through backflow sludge mixed liquid, the biochemical effect is enhanced, better water quality of produced water is achieved, and the energy consumption of the backflow pump is saved. The sludge concentration of the MBR membrane separation area is low, and the high sludge concentration aggravation MBR membrane pollution can be avoided.
To sum up, the utility model discloses MBR membrane cisterna structure is according to hydraulics and mud settlement principle, through ingenious calculation and design, and make full use of mud layering phenomenon in the membrane cisterna, and the membrane separation district and the settlement zone of different mud concentrations are formed to the advantage of leading in reason on the spatial layout of vertical direction. An upper-layer low sludge concentration area, a middle-layer separation area and a lower-layer high sludge concentration area are formed in the longitudinal direction of the membrane tank, and the MBR membrane group device is positioned in the upper-layer low sludge concentration area, so that the membrane pollution rate can be favorably reduced, the membrane pollution control effect can be obviously enhanced, and the long-term stability of the operation of the MBR membrane system can be improved; and the return pipeline of the system is arranged in a lower-layer high-sludge concentration area, so that the return ratio can be reduced and the return energy consumption can be reduced under the condition of achieving the same return effect.
The MBR membrane structure can realize high-efficiency membrane pollution control in an anaerobic environment, is durable for a long time, can also effectively recover or discharge concentrated sludge liquid, and can be applied to solid-liquid separation in special environments. Such as: use of a membrane separation system in an anaerobic, anoxic environment; the solid-liquid separation efficiency of the coagulating sedimentation; and (5) separating the special materials.
Those of ordinary skill in the art will understand that: the figures are schematic representations of one embodiment, and the blocks or processes in the figures are not necessarily required to practice the present invention.
Those of ordinary skill in the art will understand that: the components in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be correspondingly changed in one or more devices different from the embodiments. The components of the above embodiments may be combined into one component, or may be further divided into a plurality of sub-components.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A membrane pool structure for a membrane bioreactor, comprising: the system comprises an upper tank interval (1), a middle tank interval (2) and a lower tank interval (3), wherein the sludge concentration of the upper tank interval (1) is lower than that of the lower tank interval (3);
a plurality of MBR membrane pieces (4) are arranged in the upper tank interval, and the sludge after membrane reaction treatment in the upper tank interval (1) is transmitted to the middle tank interval (2);
a sludge separation part is arranged in the middle tank section (2), the sludge separated and treated in the middle tank section (2) is transmitted to the lower tank section (3), the sludge separation part comprises a plurality of inclined pipes or inclined plates (5) which are obliquely arranged, and a plurality of water distribution pipes (6) are arranged below the inclined pipes or inclined plates (5);
and a sludge settling part (7) and a backflow sludge discharge pipe (8) are arranged in the lower tank interval, and the backflow sludge discharge pipe (8) is used for refluxing the sludge settled by the sludge settling part (7).
2. A membrane bioreactor membrane pool structure according to claim 1, wherein the height ratio of the upper pool interval (1) to the intermediate pool interval (2) is: 1.1:1-5:1, the height ratio of the middle pool interval (2) to the lower pool interval (3) is as follows: 0.3:1-1.8:1.
3. The membrane bioreactor membrane pool structure of claim 1, wherein the height of the upper pool section (1) is 3000mm, the height of the middle pool section (2) is 900mm and the height of the lower pool section (3) is 2000mm and 1000 mm.
4. The membrane bioreactor membrane pool structure of claim 1, wherein the MBR membrane modules are suspended, fixed on the wall of the pool or suspended in the middle of the pool body by means of hanging beams, a certain number of curtain MBR membrane modules are fixed in each MBR membrane module, and a plurality of MBR membrane modules are arranged and fixed at the bottom of the MBR membrane modules in an inserted manner in a manner of arranging the file boxes one by one.
5. The membrane bioreactor membrane pool structure of claim 4, wherein the MBR membrane module is fixed by means including bolt connection, plug insertion or beam extrusion.
6. The membrane bioreactor membrane pool structure of any one of claims 1 to 5, wherein the length of the inclined tube or inclined plate is 900-1200mm, the inclination angle of the inclined tube or inclined plate is 30-80 °, and the tube diameter of the inclined tube or the distance between the inclined plates is 80-100 mm.
7. A membrane bioreactor membrane pool structure according to claim 6, wherein the sludge settling part (7) in the lower pool section (3) is connected with the bottom of the middle pool section (2), the return sludge discharge pipe (8) is arranged at the lower part of the sludge settling part (7), and the lower pool section (3) is a settling area and is of an inverted trapezoidal structure as a whole.
8. A membrane bioreactor membrane pool structure according to claim 7, wherein the sludge settling member (7) is a hollow inverted trapezoidal structure, and the included angle between the oblique sides of the two sides of the inverted trapezoidal structure and the bottom plane of the intermediate pool section (2) is 10-80 °.
9. The membrane bioreactor membrane pool structure of claim 8, wherein the diameter or width of the backflow sludge discharge pipe (8) is greater than or equal to 200mm, the ratio of the diameter or width of the backflow sludge discharge pipe (8) to the width of the lower bottom surface of the lower pool section (3) is 1:1-1:10, and the slope of the bottom slope of the lower pool section (3) to the upper edge of the backflow sludge discharge pipe (8) is greater than or equal to 0.02.
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| CN201920709172.4U CN210505737U (en) | 2019-05-17 | 2019-05-17 | Membrane pool structure of membrane bioreactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110240261A (en) * | 2019-05-17 | 2019-09-17 | 北京碧水源膜科技有限公司 | MBR membrane cisterna structure and the transmission system for moving back and forth MBR membrane module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110240261A (en) * | 2019-05-17 | 2019-09-17 | 北京碧水源膜科技有限公司 | MBR membrane cisterna structure and the transmission system for moving back and forth MBR membrane module |
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