CN202379852U - Two-stage membrane filter device - Google Patents
Two-stage membrane filter device Download PDFInfo
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- CN202379852U CN202379852U CN2011205186085U CN201120518608U CN202379852U CN 202379852 U CN202379852 U CN 202379852U CN 2011205186085 U CN2011205186085 U CN 2011205186085U CN 201120518608 U CN201120518608 U CN 201120518608U CN 202379852 U CN202379852 U CN 202379852U
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- membrane
- membrane cisterna
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- cisterna
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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 two-stage membrane filter device. A membrane pond is provided with a two-stage structure and comprises a primary-stage filter membrane pond and a secondary-stage filter membrane pond, and the secondary-stage filter membrane pond is arranged in the middle of the primary-stage filter membrane pond; and a primary-stage filter membrane which is used as a pond wall is arranged inside the primary-stage filter membrane pond. The secondary-stage filter membrane pond adopts the primary-stage filter membrane as the pond wall, and a membrane bioreactor (MBR) membrane is installed inside the secondary-stage filter membrane pond; and a fan is arranged outside the membrane ponds and aerates air to the primary-stage filter membrane pond and the secondary-stage filter membrane pond through aeration pipes. By adopting the two-stage design, pollution on the surface of the MBR membrane is reduced, the pollution resistance of an MBR system can be enhanced, waste water enters the secondary-stage filter membrane pond through the primary-stage filter membrane after being treated by the primary-stage filter membrane pond, and then the waste water is filtered by the MBR membrane to be discharged after reaching the standard. According to the design, the washing period of the MBR membrane can be prolonged, the washing frequency can be reduced, the service life of the membrane can be prolonged, and the running cost can be reduced.
Description
[technical field]
The utility model relates to water-treatment technology field, and more specifically, the utility model relates to a kind of twin-stage membrane filter appts that is used for industry or municipal sewage treatment.
[background technology]
MBR (membrane bioreactor; Membrane biological reactor) technology is a kind of high-efficiency sewage treatment process that traditional biological treatment and membrane separation technique are combined, and this process structure is simple than traditional technology, and it is good to go out water quality; Can bear the dark concentration of high mud; Anti-alluviation property is strong, can realize robotization control, comes into one's own day by day in the sewage recycling field.
Practical application in the MBR, the film over the role of the membrane filtration tanks very high sludge concentration and will be higher, so the silk membrane surface will be the concentration polarization phenomenon, as for the suction, this phenomenon more intense, more and more of organic and inorganic colloidal particles and other contaminants adhering to the surface of the membrane fiber or yarn into the membrane interior; while play a major role in this process, contaminants are organic compounds, or other organic promotes microbes, inorganic particles attached set, including extracellular polymeric EPS, soluble microbial products SMP, specifically refers to proteins, extracellular enzyme and polysaccharide.They are maximum to the contribution of film silk pollution and the contribution that mould is raise.Therefore how to effectively reduce the pollution of organism, particularly under the less situation of low temperature or the COD of intaking, reduce the film silk and pollute and just become the key point that controlling diaphragm pollutes the film silk.
It is little that MBR technology has an occupation area of equipment, easily is automated advantages such as control, but the film silk in use is prone to pollute; MBR process system operational administrative is caused very big inconvenience; Make online backwash frequency increase, shortened work-ing life, increased energy consumption greatly.Simultaneously because water quality requirement; Particularly concerning the waste water that contains the macromole organic pollutant, during using, general MBR all can before membrane cisterna, install the pre-treatment aeration tank additional, to reduce the sludge loading of membrane cisterna; But this has increased processing cost undoubtedly; Type long-pending EPS, solvability inorganics etc. also can advance to put membrane cisterna along with current in the aeration tank simultaneously, more can increase the content of membrane cisterna EPS, can aggravate the pollution of film.
At present in actual engineering mainly be through improve the aeration structure, or the mode of adding additives such as flocculation agent for example reduce the attach collection of organism such as EPS on film silk surface; But in use all it is restricted for this dual mode; Be that cost is excessive on the one hand; On the other hand, add flocculation agent microbic activity is had bigger influence;
One Chinese patent application 200810120467.4 proposes to utilize the mode treatment of dyeing and printing of continuous ultra filtration and r-o-; Mixed solution is earlier through ultra-filtration filters under this mode; Pass through r-o-again, though effluent quality is better, its essence is a kind of continuous membrane filter; The EPS that exists at membrane cisterna remains existence to the pollution of film, and unresolved EPS is to the pollution problem of film.
[summary of the invention]
The purpose of the utility model is in order to solve the defective of present technology, provides a kind of organism such as EPS that can effectively reduce at the gathering of film silk surface, membrane filter appts simple in structure, that extensively be suitable for.
In order to realize the foregoing invention purpose; The utility model provides a kind of stage type membrane filter appts; Comprise membrane cisterna, one-level filtering membrane and MBR group device and MBR film, wherein, said membrane cisterna has the two-stage type structure; Said membrane cisterna comprises one-level filtration membrane cisterna 7 and cascade filtration membrane cisterna 8, and said cascade filtration membrane cisterna 8 is positioned at the centre 7 that said one-level is filtered membrane cisterna; Said one-level is filtered in the membrane cisterna 7 and is provided with the one-level filtering membrane 3 as pool wall; Said cascade filtration membrane cisterna 8 is a pool wall with one-level filtering membrane 3, and MBR film 4 is installed in the cascade filtration membrane cisterna 8; Blower fan 9 is arranged outside said membrane cisterna, and said blower fan 9 filters membrane cisterna 7 and cascade filtration membrane cisterna aeration 8 through aeration tube to said one-level respectively.
According to preferred embodiment a kind of, it is identical with the degree of depth of cascade filtration membrane cisterna 8 that said one-level is filtered membrane cisterna 7, and the bottom surface height is concordant.And the pool wall height of said one-level filtration membrane cisterna 7 is identical with the pool wall height of cascade filtration membrane cisterna 8.
In the utility model, said one-level filtering membrane 3 is selected from the non-woven fabrics that polypropylene fibre (PP), terylene (PET), polyamide fibre (PA), viscose fiber, acrylic fibers, polyethylene (HDPE), polyvinyl chloride fibre (PVC) are processed; Be the best particularly preferably with the PP non-woven fabrics.
According to another preferred embodiment, the shape of said one-level filtering membrane 3 is pliciform, tubulose or tabular; Be the best with fan folding shape form preferably, under the equal volume, area is maximum.
According to preferred embodiment a kind of, the aperture of said one-level filtering membrane 3 is the 10-500 micron, preferably with 100 microns the bests.
In the utility model, said MBR film 4 be selected from polycarbonate (Polycarbonate, PC), polymeric amide (nylon; Polyamide; PA), polyacetal (Polyacetal, Polyoxy Methylene, POM), sex change ppe (Poly Phenylene Oxide; Sex change PPE), polyester (PETP; PBTP), polyphenylene sulfide (Polyphenylene Sulfide, PPS), gather the microporous membrane that aryl ester unsaturated polyester, phenol plastic cement, epoxy plastic cement, Vestolen PP 7052 materials such as (PP) are processed, preferably best with the PP material.
According to preferred embodiment a kind of, said aeration tube is that the aperture is 5-15mm, preferably is best with 7mm.The pitch of holes of said aeration tube is 10-40mm, preferably is best with 20mm.
Particularly, the utility model provides a kind of can effectively reduce the two-stage filtration formula MBR water treatment device that traditional MBR technology film pollutes, and agent structure is acidication equalizing tank and integral type twin-stage membrane cisterna---and filter membrane cisterna 7 by one-level and form with cascade filtration membrane cisterna 8.It is inner that the secondary membrane cisterna is positioned at the one-level membrane cisterna, forms a Back Word type structure, and the two-stage membrane cisterna is with the dark same end.Wherein, one-level filtration membrane cisterna 7 has replaced the pre-treatment aeration tank in traditional MBR technology.Waste water is introduced into one-level and filters in the membrane cisterna 7, and the filtration through one-level filtering membrane 3 gets into cascade filtration membrane cisterna 8 then, and the membrane cisterna of traditional M BR group device promptly is installed.The water that passes through like this, again behind the secondary membrane filtration can qualified discharge.
During operation, the pre-treatment of sewage process (for example adopt the acidication equalizing tank---can select for use according to influent quality) back entering one-level filtration membrane cisterna 7.This moment is because mixed liquid concentration is very high, so can handle the higher waste water of COD.The microbiological deterioration of waste water in mixed solution is handled; At first filter through one-level filtering membrane 3, one-level filtering membrane 3 can be the rectangle frame body structure, filters little shape membrane cisterna of membrane cisterna 7 inner formation in one-level; But top uncovered; Can filter or tackle the secretory product EPS of the organism in the mixed solution, particularly mikrobe, these are prone to attach on microfiltration membrane silk surface the pollutent of collection like protein, extracellular enzyme, polysaccharide and nucleic acid etc.
Water through after 3 filtrations of one-level filtering membrane gets into the secondary membrane cisterna, carries out the MBR micro-filtrate membrane filtration again.At this moment the organic content in the water is very low, and water pollutant mainly is more small inorganic suspended particles, can not produce serious pollution to microfiltration membrane.
Therefore, the device of the utility model need not to be provided with the pre-treatment aeration tank in traditional MBR technology, and pre-treatment aeration tank function is filtered membrane cisterna 7 by one-level and replaced.
Generally speaking, it is between the 100-20000mg/l that one-level is filtered membrane cisterna 7 water inlet COD scopes, can anti-water inlet matter fluctuation range bigger, and the mixed solution sludge concentration scopes that the one-level in the operational process is filtered in the membrane cisterna 7 generally are 5000-15000mg/l;
According to influent quality and processing requirements, the hydraulic detention time HRT in the one-level membrane cisterna is 6-19 hour, and one-level membrane cisterna hydraulic detention time generally accounts for the 75%-90% of total residence time;
The average flux of one-level filtering membrane 3 is at 120-500l/m
2H.
The aeration intensity that one-level is filtered in the membrane cisterna 7 can be 30m
3/ m
2.h～90m
3/ m
2.h.
It should be noted that the one-level membrane filtration can adopt bed filtration film group, perhaps select multiple filtration of material film group simultaneously for use, like the multi-layer nonwoven fabrics assembly, the device that perhaps combines by non-woven fabrics assembly and microwell plate assembly, the preferred number of plies is 3 layers.
Cascade filtration membrane cisterna 8 is traditional MBR membrane cisterna, and its residence time is in the 1-3h scope, accounts for the 10%-15% of total residence time.
Mixed solution turbidity in the cascade filtration membrane cisterna 8 is between 2-30NTU.
[description of drawings]
Fig. 1 is the apparatus structure synoptic diagram of the utility model;
Wherein: 3, one-level filtering membrane; 4, MBR film; 7, one-level is filtered membrane cisterna; 8, cascade filtration membrane cisterna; 9, blower fan.
[embodiment]
Below in conjunction with accompanying drawing and specific embodiment the utility model is specified.
Build unified cover stage type membrane filter appts, comprise three-back-shaped membrane cisterna, wherein, said three-back-shaped membrane cisterna has the two-stage type structure, comprises peripheral one-level filtration membrane cisterna 7 and is positioned at intermediary cascade filtration membrane cisterna 8.One-level is filtered in the membrane cisterna 7 and the pliciform polypropylene non-woven fabric is set as one-level filtering membrane 3, and one-level filtering membrane 3 also filters the pool wall of membrane cisterna 7 and cascade filtration membrane cisterna 8 as separating one-level.100 microns of its mean pore sizes, setting angle are 45 °.In cascade filtration membrane cisterna 8, be provided with secondary MBR group device and MBR film 4.Membrane cisterna aeration outside outside this three-back-shaped membrane cisterna, inwardly distinguishing through blower fan 9 and aeration tube.When building, inside and outside membrane cisterna is dark together the end of with.
During operation, get into one-level through the sewage that overregulates (pre-treatment) and filter membrane cisterna 7, carry out aerobic biochemical and handle.Micro-pore aeration system in the membrane cisterna mainly is for the mikrobe in the mixed solution in the one-level filtration membrane cisterna 7 needed dissolved oxygen to be provided.Sewage in one-level membrane cisterna 7 about 6-19 of the residence time hour.
Filter membrane cisterna 7 through one-level and handle back entering cascade filtration membrane cisterna 8 under action of gravity.In cascade filtration membrane cisterna 8; MBR film group device conventional in the prior art is installed; Owing to be prone to cause that through containing EPS etc. in the one-level filtering filtrating organic content of film mud is lower, filter with cascade filtration film-MBR film again this moment, can not cause severe contamination to film.
Water turbidity through after the one-level filtration treatment is less, and generally between 2-30NTU, the clearance of organic pollutants such as the EPS in the filtrating can reach 95%-99%, and TOC is 1-5mg/l, thus the MBR film 4 in the protection cascade filtration membrane cisterna 8.The hydraulic detention time of cascade filtration membrane cisterna 8 is shorter, generally at 1-3 hour.
Compare with existing filtration unit; The utility model owing to adopted the stage type design, therefore the pollution to MBR film surface reduces greatly, has strengthened the antifouling property of MBR system; In actual engineering, can prolong the cleaning interval of MBR film; Reduce cleaning frequency, prolong the work-ing life of film, reduce cost greatly.
Claims (11)
1. stage type membrane filter appts; Comprise membrane cisterna, one-level filtering membrane, MBR group device and MBR film; It is characterized in that said membrane cisterna has the two-stage type structure; Said membrane cisterna comprises one-level filtration membrane cisterna (7) and cascade filtration membrane cisterna (8), and said cascade filtration membrane cisterna (8) is positioned at the centre (7) that said one-level is filtered membrane cisterna; Said one-level is filtered in the membrane cisterna (7) and is provided with the one-level filtering membrane (3) as pool wall; Said cascade filtration membrane cisterna (8) is a pool wall with one-level filtering membrane (3), and MBR film (4) is installed in the cascade filtration membrane cisterna (8); Blower fan (9) is arranged outside said membrane cisterna, and said blower fan (9) filters membrane cisterna (7) and cascade filtration membrane cisterna aeration (8) through aeration tube to said one-level respectively.
2. stage type membrane filter appts according to claim 1, it is identical with the degree of depth of cascade filtration membrane cisterna (8) to it is characterized in that said one-level is filtered membrane cisterna (7), and the bottom surface height is concordant.
3. stage type membrane filter appts according to claim 1 is characterized in that the pool wall height of said one-level filtration membrane cisterna (7) is identical with the pool wall height of cascade filtration membrane cisterna (8).
4. stage type membrane filter appts according to claim 1 is characterized in that said one-level filtering membrane (3) is selected from the non-woven fabrics that polypropylene fibre, terylene, polyamide fibre, acrylic fibers, polyethylene or polyvinyl chloride fibre are processed.
5. stage type membrane filter appts according to claim 1 is characterized in that said one-level filtering membrane (3) is the PP non-woven fabrics.
6. stage type membrane filter appts according to claim 1, the shape that it is characterized in that said one-level filtering membrane (3) is pliciform, tubulose or tabular.
7. stage type membrane filter appts according to claim 1, the aperture that it is characterized in that said one-level filtering membrane (3) is the 10-500 micron.
8. stage type membrane filter appts according to claim 1, the aperture that it is characterized in that said one-level filtering membrane (3) is 100 microns.
9. stage type membrane filter appts according to claim 1 is characterized in that said MBR film (4) is selected from polycarbonate, polymeric amide, polyacetal, sex change ppe, polyester, polyphenylene sulfide, gathers aryl ester, unsaturated polyester, phenol plastic cement, epoxy plastic cement or Vestolen PP 7052 and process microporous membrane.
10. stage type membrane filter appts according to claim 1 is characterized in that said aeration tube is that the aperture is 5-15mm.
11. stage type membrane filter appts according to claim 1, the pitch of holes that it is characterized in that said aeration tube is 10-40mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205186085U CN202379852U (en) | 2011-12-13 | 2011-12-13 | Two-stage membrane filter device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205186085U CN202379852U (en) | 2011-12-13 | 2011-12-13 | Two-stage membrane filter device |
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| Publication Number | Publication Date |
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| CN202379852U true CN202379852U (en) | 2012-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205186085U Expired - Lifetime CN202379852U (en) | 2011-12-13 | 2011-12-13 | Two-stage membrane filter device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113402105A (en) * | 2021-05-09 | 2021-09-17 | 江西维清环境工程有限公司 | Process for treating printing and dyeing wastewater by using two-stage MBR (membrane bioreactor) membrane |
-
2011
- 2011-12-13 CN CN2011205186085U patent/CN202379852U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113402105A (en) * | 2021-05-09 | 2021-09-17 | 江西维清环境工程有限公司 | Process for treating printing and dyeing wastewater by using two-stage MBR (membrane bioreactor) membrane |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120815 |
|
| CX01 | Expiry of patent term |