CN202237811U - External pressure type hollow fiber ultrafiltration membrane module of external membrane bioreactor - Google Patents
External pressure type hollow fiber ultrafiltration membrane module of external membrane bioreactor Download PDFInfo
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- CN202237811U CN202237811U CN2011203574423U CN201120357442U CN202237811U CN 202237811 U CN202237811 U CN 202237811U CN 2011203574423 U CN2011203574423 U CN 2011203574423U CN 201120357442 U CN201120357442 U CN 201120357442U CN 202237811 U CN202237811 U CN 202237811U
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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 an external pressure type hollow fiber ultrafiltration membrane module of an external membrane bioreactor, which comprises a shell, a water intake distribution plate, a sealing plate, a hollow fiber ultrafiltration membrane, an air stripping device and a spiral diversion slot, wherein one end of the shell is provided with a water inlet, and the other end of the shell is provided with a water producing port and a backflow port; the water intake distribution plate is fixedly connected into the shell and is close to the water inlet; the sealing plate is fixedly connected into the shell and is close to the water producing port; one end of the hollow fiber ultrafiltration membrane is bonded with the water intake distribution plate, and the other end of the hollow fiber ultrafiltration membrane is boned and sealed with the sealing plate to form a hollow fiber ultrafiltration membrane water inlet cavity; an opening part of the membrane is connected to the water producing port; the part of the sealing plate, corresponding to the hollow fiber ultrafiltration membrane water inlet cavity, is provided with an opening which is connected to the backflow port; the air stripping device is arranged on the part of the shell, which is provided with the water inlet; and the spiral diversion slot is arranged on the inner wall of the part of the shell, which is provided with the water inlet. The module has large flux, and simultaneously, can be applied to higher sludge concentration, the pollution of the membrane is effectively delayed, the service life of the membrane is greatly prolonged, the cleaning time is reduced, and thus, the operation and maintenance cost is saved.
Description
Technical field
The utility model relates to a kind of membrane bioreactor water treatment facilities, particularly a kind of doughnut external-compression type hyperfiltration membrane assembly that is used for external membrane bioreactor.
Background technology
In recent years, along with the implementation of national environmental protection policy, the market demand rapid growth relevant with water treatment, with the speed increase in every year nearly 30%, membrane bioreactor (MBR) market based on membrane technology constantly enlarges the market demand of membrane technology thus especially.Yet, in large-scale membrane bioreactor is used, often run into film pollution, difficult problems such as flux is little, efficient is low, occupation of land is big, energy consumption height, hindered the quickening of membrane technology during China " 12 " and promoted and use.
Membrane bioreactor (MBR) is the novel waste water technology that modern membrane separation technique and biotechnology organically combine.Advantages such as it mainly is made up of bioreactor and membrane module, utilizes membrane separation plant with activated sludge and larger molecular organics matter effectively catching, substitutes second pond, has practiced thrift the project occupation of land area, and it is good to have a treatment effect, and operating cost is low.According to the position that is provided with of membrane module, two kinds of existing MBR is divided into built-in (being also referred to as integral type, immersion) and externals.
One, built-in MBR:
Built-in MBR is meant membrane module is placed on bioreactor inside, obtains filtered fluid through negative pressure suction or siphon, and the pollution on film surface is delayed by the turbulent flow that aeration produces.Built-in MBR adopts external-compression type hollow-fibre membrane or flat sheet membrane more, owing to be negative pressure evacuation pattern, so water is measured very low thoroughly; Because membrane module is immersed in biochemistry pool, the film silk is washed away by bubble all the time, so the wire broken rate height causes producing water water quality variation then simultaneously.Simultaneously, there is the gas-liquid skewness in built-in doughnut MBR system, and doughnut is prone to by the mud adhesion; Cleaning operation is loaded down with trivial details, is difficult to clean on the spot hollow fiber film assembly repair maintenance difficulty; Hollow-fibre membrane is prone to by problems such as foreign matter damages, thereby causes reduce the service life of film.
In addition, for keeping certain dissolved oxygen and preventing that the film silk is dirty stifled, need constantly to give the biological tank aeration, thereby energy consumption is higher.About 1.0～the 2.4kwh/m of processing energy consumption of the built-in membrane bioreactor unit water yield of using at present
3(turn round and look at equality, 2000, Chinese water supply and drainage Vol.16 (3), 5-8; Tatsuki Ueda and Kenji Hata 1999, water research, 33,2888-2892).
Two, external MBR:
External MBR is meant membrane module and bioreactor is split that by pump pressure mixed liquor is delivered to membrane module, filtered fluid is as water outlet, and concentrate loops back bioreactor, and the pollution on film surface is delayed by the shear action of circulation mixed liquor on the film surface.External MBR adopts the inner pressed tubular membrane, adopts the positive pressure operation pattern, so the water amount of passing through can be higher; But for alleviating the pollution of film silk inwall, must keep water inlet high flow rate and big reflux ratio, thereby energy consumption very high (generally be built-in MBR 4～6 times), simultaneously because the loading density of tubular membrane component is lower, so effective separating area of membrane module is little.
In sum; Demand designing novel membrane module at present urgently; Can the optimize integration advantage of external membrane bioreactor and built-in membrane bioreactor makes that it has that flux is big, energy consumption is low, the characteristics of anti-pollution, convenience for washing, keeps the stable of film system.
The utility model content
The utility model technical problem to be solved is to provide a kind of doughnut external-compression type hyperfiltration membrane assembly of external membrane bioreactor; Overcome the defective that existing technology exists; Make it can realize that feed liquid is evenly distributed, the cleaning on the spot of membrane module, no dead angle; System is easy to management and maintenance, and strainability is stable.
In order to overcome above-mentioned technical problem, the technical scheme of the utility model is following:
A kind of doughnut external-compression type hyperfiltration membrane assembly of external membrane bioreactor comprises:
Housing, this housing one end is provided with water inlet, and the other end is provided with and produces the mouth of a river and refluxing opening relatively;
Be fixedly connected on the interior inlet distribution plate of said housing near the water inlet;
Be fixedly connected in the said housing near the sealing plate that produces place, the mouth of a river;
The hollow fiber ultrafiltration membrane silk, an end of said hollow fiber ultrafiltration membrane silk and said inlet distribution plate are bonding, and the other end and said sealing plate are bonded and sealed to form a hollow fiber ultrafiltration membrane silk intake antrum; The opening part of said hollow fiber ultrafiltration membrane silk connects to the said product mouth of a river; The corresponding hollow fiber ultrafiltration membrane silk of said sealing plate intake antrum place is provided with opening, and this opening connects to said refluxing opening; Be provided with air-lift device in said housing water inlet; On the inwall of said housing, be provided with the spiral stream guidance groove near water inlet.
Upper end cover and bottom end cover that said housing comprises cylinder body and is arranged on said cylinder body two ends.
Said bottom end cover is through outside stainless steel lathe dog, O type rubber ring and said cylinder body Butt sealing.
Said upper end cover is through outside stainless steel lathe dog, O type rubber ring and said cylinder body Butt sealing.
Said water inlet and said bottom end cover are structure as a whole.
The said product mouth of a river and upper end cover are integrative-structures.
Said refluxing opening inserts the center of said upper end cover, and is tightly connected through O type rubber ring and upper end cover.
The loading density of said doughnut external-compression type hyperfiltration membrane assembly is at 300-600m
2/ m
3
The ratio of height to diameter of said cylinder body is between 7-15.
Adopt the doughnut external-compression type hyperfiltration membrane assembly of the external MBR of said structure, with the drawback of effectively avoiding traditional MBR, organic combination is advantage in many ways; When flux is big, also can be suitable for higher sludge concentration, the mode of taking gas scouring and hydraulic reverse flushing to combine in addition will effectively delay the pollution of film; Prolong the service life of film greatly; Reduce scavenging period, thereby save operation and maintenance cost, promote the application advantage of MBR in town sewage, trade effluent, Zhong Shui field.
Description of drawings
Fig. 1 is the structure diagram of the doughnut external-compression type hyperfiltration membrane assembly of the utility model external membrane bioreactor.
The specific embodiment
Describe the utility model below in conjunction with accompanying drawing 1 in detail with embodiment.
As shown in Figure 1, a kind of doughnut external-compression type hyperfiltration membrane assembly of external membrane bioreactor, it comprises hollow fiber ultrafiltration membrane silk 5, cylinder body 6, upper end cover 4, bottom end cover 8 and air-lift device 10.Hollow fiber ultrafiltration membrane silk 5 is placed in the inlet distribution plate 7, and hollow fiber ultrafiltration membrane silk 5 one end fibers and inlet distribution plate 7 bondings also are fixed in the cylinder body 6.
Feed liquid gets into the doughnut external-compression type hyperfiltration membrane assembly of the external membrane bioreactor of the utility model through water inlet 1; Behind the spiral stream guidance groove 9 on bottom end cover 8 inwalls; The inlet opening of muddy water on inlet distribution plate 7 gets into component internal; After the fenestra mud-water separation on hollow fiber ultrafiltration membrane silk 5 outer walls, water gets into the inner chamber of hollow fiber ultrafiltration membrane silk 5, and after coming together in upper end cover 4; Flow out (representing to produce water with arrow OUT1 Fig. 1 flows out) from producing the mouth of a river 2, the residue muddy water mixed solution then is back to front end biochemistry pool (representing to remain muddy water mixed solution with arrow OUT2 Fig. 1 refluxes) from refluxing opening 3.
Adopt the doughnut external-compression type hyperfiltration membrane assembly of the external membrane bioreactor of said structure to form external pressure doughnut external membrane bioreactor, its preparation method comprises following processing step:
(1) adopts Kynoar PVDF raw material, be equipped with solvent, special additive, pore former, preparation stoste, stir in 40-90 ℃ of interval;
(2), adopt special expressing technique with the stoste vacuum outgas;
(3) special spinning technique, has spongy microstructure at the film silk aperture homogeneous of guaranteeing to spin;
(4) the film silk is carried out post processing, can adopt modes such as water, glycerine, heating;
(5) the film silk is passed through adhesive package at the membrane module shell, be prepared into membrane module;
(6) loading density of membrane module is at 300-600m
2/ m
3
(7) ratio of height to diameter of membrane module housing is between 7-15;
(8) membrane module is suitable for sludge concentration between 5-30g/l.
The doughnut external-compression type hyperfiltration membrane assembly main feature of the external membrane bioreactor of said structure is that the External Pressure Type hollow-fibre membrane is applied to external membrane bioreactor system, and is provided with special-purpose air-lift device in membrane module bottom; And come the movement locus and the fluidised form of reasonably optimizing gas, water, mud through the ratio of height to diameter of setting the membrane module housing, the draw ratio of film silk, the loading density of membrane module; Adopt positive pressure operation simultaneously; Membrane module is moved under the high flux state; In conjunction with the cleaning way of timing air-water backwashing, significantly improve the restorability after film pollutes.Can under the situation that adopts the low gas amount of putting forward, keep higher membrane flux, effectively delay film simultaneously and pollute, reduce operation energy consumption, realize the long-term stability operation of external membrane bioreactor system membrane module.
In sum, the main improvement and the technique effect of the doughnut external-compression type hyperfiltration membrane assembly of the utility model external membrane bioreactor are:
Improve the film yarn quality, the exploitation of innovation ground is applicable to the PVDF external pressure hollow-fibre membrane of external MBR.This project adopts radially helical feed technology, can guarantee that hollow-fibre membrane silk performance is more stable, and mechanical strength is big; And the monofilament of novelty is received silk technology, can effectively avoid tradition to receive in the silk technology, and film silk because in enormous quantities is collected phenomenons such as being crushed of causing, compacting, so the film silk flux that monofilament is collected is bigger, the chemical property excellence.
The membrane module structure innovation.To the waterpower passage novelty of External Pressure Type membrane module be optimized design, guarantee that sewage can carry out preliminary Separation of Solid and Liquid through the spiral stream guidance groove on the bottom head covers inwall when getting into membrane module, effectively avoid component internal mud dirty stifled; Through the ratio of height to diameter of optimization component, the parameters such as external diameter of film silk, research and develop the big membrane module of loading density simultaneously, improve the disposal ability of single membrane module, can reduce equipment and take up an area of, reduce investment outlay; Backwash procedure combines the cleaning way of regular air water back washing, has improved film silk backwash efficiency greatly, significantly delays the pollution of film, and energy consumption is low, long service life, operating cost are little.
The system process innovation.This device is placed on bioreactor with PVDF external pressure hollow fiber film assembly originally.Adopt the external-compression type water intake mode, the dirty stifled risk of film silk is little, can be suitable for the water inlet of high sludge concentration, and therefore, biodegradation efficient improves, and whole MBR system effectiveness improves; Take positive pressure operation simultaneously, the flux of film silk will greatly increase, and equipment takes up an area of little, and investment reduces; Effectively the air water backwash guarantees that film silk restorability is good, and filtration resistance is little, thereby energy consumption is low.This project has solved existing MBR can't realize high-performance, low energy consumption, a low-cost difficult problem that organically combines.
The description of above embodiment mainly is for basic principle that the utility model is described and principal character.The utility model is not limited to the description scope of the foregoing description, in the scope of the utility model appended claims, can make variously replenish, change and replacing.
Claims (9)
1. the doughnut external-compression type hyperfiltration membrane assembly of an external membrane bioreactor is characterized in that, comprising:
Housing, this housing one end is provided with water inlet (1), and the other end is provided with and produces the mouth of a river (2) and refluxing opening (3) relatively;
Be fixedly connected on the inlet distribution plate of locating near water inlet (1) in the housing (7);
Be fixedly connected in the housing near producing the sealing plate (19) that the mouth of a river (2) is located;
Hollow fiber ultrafiltration membrane silk (5), an end of said hollow fiber ultrafiltration membrane silk (5) and said inlet distribution plate (7) are bonding, and the other end and said sealing plate (19) are bonded and sealed to form a hollow fiber ultrafiltration membrane silk intake antrum; The opening part of said hollow fiber ultrafiltration membrane silk (5) connects to the said product mouth of a river (2); The corresponding hollow fiber ultrafiltration membrane silk of said sealing plate (19) intake antrum place is provided with opening, and this opening connects to said refluxing opening (3);
Water inlet (1) at said housing locates to be provided with air-lift device (10); And
On the inwall of said housing, be provided with spiral stream guidance groove (9) near water inlet (1).
2. the doughnut external-compression type hyperfiltration membrane assembly of external membrane bioreactor as claimed in claim 1 is characterized in that, upper end cover (4) and bottom end cover (8) that said housing comprises cylinder body (6) and is arranged on this cylinder body (6) two ends.
3. the doughnut external-compression type hyperfiltration membrane assembly of external membrane bioreactor as claimed in claim 2 is characterized in that, said bottom end cover (8) is through outside stainless steel lathe dog, O type rubber ring and said cylinder body (6) Butt sealing.
4. the doughnut external-compression type hyperfiltration membrane assembly spare of external membrane bioreactor as claimed in claim 2 is characterized in that, said upper end cover (4) is through outside stainless steel lathe dog, O type rubber ring and said cylinder body (6) Butt sealing.
5. the doughnut external-compression type hyperfiltration membrane assembly of external membrane bioreactor as claimed in claim 2 is characterized in that, said water inlet (1) is structure as a whole with said bottom end cover (8).
6. the doughnut external-compression type hyperfiltration membrane assembly of external membrane bioreactor as claimed in claim 2 is characterized in that, the said product mouth of a river (2) is an integrative-structure with upper end cover (4).
7. the doughnut external-compression type hyperfiltration membrane assembly of external membrane bioreactor as claimed in claim 2 is characterized in that, said refluxing opening (3) inserts the center of said upper end cover (4), and is tightly connected through O type rubber ring and upper end cover (4).
8. like the doughnut external-compression type hyperfiltration membrane assembly of the described external membrane bioreactor of arbitrary claim in the claim 1 to 7, it is characterized in that the loading density of said polysulfone hollow fiber ultrafiltration membrane system is at 300-600m
2/ m
3
9. like the doughnut external-compression type hyperfiltration membrane assembly of the described external membrane bioreactor of arbitrary claim in the claim 2 to 7, it is characterized in that the ratio of height to diameter of said cylinder body (6) is between 7-15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203574423U CN202237811U (en) | 2011-09-22 | 2011-09-22 | External pressure type hollow fiber ultrafiltration membrane module of external membrane bioreactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203574423U CN202237811U (en) | 2011-09-22 | 2011-09-22 | External pressure type hollow fiber ultrafiltration membrane module of external membrane bioreactor |
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| CN202237811U true CN202237811U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203574423U Expired - Lifetime CN202237811U (en) | 2011-09-22 | 2011-09-22 | External pressure type hollow fiber ultrafiltration membrane module of external membrane bioreactor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102942250A (en) * | 2012-12-11 | 2013-02-27 | 上海膜源环保科技有限公司 | Membrane module for novel efficient membrane bioreactor |
| CN105935553A (en) * | 2016-05-31 | 2016-09-14 | 河海大学 | Multi-tube water distribution hollow filter ultrafilter membrane assembly |
| CN106669424A (en) * | 2017-02-28 | 2017-05-17 | 江苏新奇环保有限公司 | Recyclable external tube type ultrafiltration membrane assembly and application method thereof |
| CN109399819A (en) * | 2018-09-28 | 2019-03-01 | 水艺控股集团股份有限公司 | A kind of ultrafiltration water-purifying apparatus and control method |
| CN114314760A (en) * | 2021-12-31 | 2022-04-12 | 武汉飞博乐环保工程有限公司 | Circulating water purification device and purification method |
-
2011
- 2011-09-22 CN CN2011203574423U patent/CN202237811U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102942250A (en) * | 2012-12-11 | 2013-02-27 | 上海膜源环保科技有限公司 | Membrane module for novel efficient membrane bioreactor |
| CN105935553A (en) * | 2016-05-31 | 2016-09-14 | 河海大学 | Multi-tube water distribution hollow filter ultrafilter membrane assembly |
| CN106669424A (en) * | 2017-02-28 | 2017-05-17 | 江苏新奇环保有限公司 | Recyclable external tube type ultrafiltration membrane assembly and application method thereof |
| CN109399819A (en) * | 2018-09-28 | 2019-03-01 | 水艺控股集团股份有限公司 | A kind of ultrafiltration water-purifying apparatus and control method |
| CN114314760A (en) * | 2021-12-31 | 2022-04-12 | 武汉飞博乐环保工程有限公司 | Circulating water purification device and purification method |
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| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120530 |
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| CX01 | Expiry of patent term |