CN103239999A - Flat plate-type membrane element with uniformly distributed producing water flux - Google Patents
Flat plate-type membrane element with uniformly distributed producing water flux Download PDFInfo
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- CN103239999A CN103239999A CN2013102278642A CN201310227864A CN103239999A CN 103239999 A CN103239999 A CN 103239999A CN 2013102278642 A CN2013102278642 A CN 2013102278642A CN 201310227864 A CN201310227864 A CN 201310227864A CN 103239999 A CN103239999 A CN 103239999A
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Abstract
The invention discloses a flat plate-type membrane element with uniformly distributed producing water flux. The flat plate-type membrane element consists of a substrate and two membranes respectively arranged on the front end face and the rear end face of the substrate. The peripheries of the two membranes are connected with the substrate; the two membranes and the substrate form a closed accommodating cavity; two producing water header pipes are respectively arranged at the left side and the right side of the substrate; the substrate is provided with a row of transverse hollow producing water branch pipes; the left end part and the right end part of each producing water branch pipe respectively extend to the two producing water header pipes; the left end part and the right end part of each producing water branch pipe are respectively communicated with the corresponding producing water header pipe; the producing water header pipes are arranged over against the front and rear two membranes; the length direction of each producing water header pipe is evenly provided with a plurality of flow limiting gulley holes; and the water inlet ends of the flow limiting gulley holes are contacted with the corresponding membranes. According to the flat plate-type membrane element with the uniformly distributed producing water flux, the relative balance of the producing water flux of all unit area membranes of a membrane surface can be realized to restrict the supercritical flux phenomenon. The flat plate-type membrane element with the uniformly distributed producing water flux not only is in favor of improving the integral level the critical flux of a membrane product and reducing the investment cost and is also in favor of reducing the energy consumption and saving the operating cost.
Description
Technical field
The invention belongs to water treatment micro-filtration and hyperfiltration technique field, be specifically related to the flat membrane component of a kind of submerged membrane bioreactor (MBR).
Background technology
According to research conclusion, the stifled major part of the dirt of MBR film device is caused by its face sludgd deposition.It is dirty stifled and wash away and peel off that two trend is conflicting, the product of mutual balance that the concept of critical flux is exactly film device when operation, and subcritical flux (subcritical flux) method of operation is present MBR film device operation restriction, delays the main method that film pollutes.But because the structural design of the membrane component of prior art is reasonable inadequately, film produces the water flux skewness, in actual moving process, the water outlet place regional area that totally is in the membrane component of subcritical flux operation still is in overcritical flux (being higher than critical flux) state, and other regional film seldom produces water, and some is local even do not participate in work.
At present, the membrane component of submerged membrane bioreactor (MBR) mainly contains doughnut and flat two kinds.Wherein, the film silk of hollow-fibre membrane (the producing the water arm) cross-sectional area that confluxes is less, unit membrane area filtration flux specially is not restricted, if want that reaching the unit membrane area in film filament length degree direction goes out hydrologic(al) budget, film filament length degree must limit within the specific limits, according to calculating and practice summary, this requirement can't realize.And the Flat Membrane of prior art all only has one to two total faucet usually, the diameter of total faucet also is subjected to the restriction of substrate thickness, if unit membrane area filtration flux is unrestricted, total faucet has not only limited water outlet, and make the product water flux too high (overcritical flux) of close region of total faucet, and the product water flux of remote areas can successively decrease gradually, from faucet farthest the corner in addition may not produce water.
So, the structural design of membrane component caused the dirty stifled following characteristics that present of film of MBR device in the past: (1) is because the membrane flux skewness, be in overcritical membrane flux operation from delivery port film the most nearby, make Flat Membrane be total faucet near zone in dirty stifled place at first, and hollow-fibre membrane is positioned at the root that the film silk connects collection pipe in dirty stifled place at first; (2) method of operation of constant water outlet orders about that the dirt of membrane component is stifled to be spread rapidly and spread.After local dirty blocking up, effective filtration area reduces, constant in order to guarantee its flux, have only other regional membrane flux of increasing just can compensate, the overcritical flux operation in zone and the unbalanced phenomenon of Flux Distribution are more serious, therefore cause film dirt more rapidly stifled, form the dirty stifled accident of calamitous film at last.
In order to improve and to eliminate this phenomenon, the whole level that reduces critical flux, make the All Ranges strictness be in subcritical flux operation, this can cause comparatively serious cost waste (at present a lot of engineerings are used the way of the conservative value of taking of flux, just mean that also the actual membrane flux can't reach the nominal requirement); Significantly improve the aeration scouring intensity and clean frequency, this can form higher energy consumption and operating cost.
Therefore, need a kind of uniform flat membrane component of water flux that produces in the prior art badly.
Summary of the invention
The objective of the invention is provides a kind of uniform flat membrane component of water flux that produces in order to overcome the deficiency that prior art exists.
The present invention is achieved by the following technical solutions: a kind of uniform flat membrane component of water flux that produces, constituted by substrate and 2 diaphragms that are arranged at this substrate rear and front end face, the periphery of 2 diaphragms is connected with substrate, form close cavity between 2 diaphragms and the substrate, the left and right sides of described substrate is provided with two and produces the supply mains, described substrate evenly is provided with the product water arm of many hollows, two ends extend to two respectively and produce the supply mains place about every product water arm, and two ends are communicated with corresponding product supply mains respectively about every product water arm, product water arm is right against former and later two diaphragms and evenly is provided with a plurality of current limliting gully-holes on the length direction of this product water arm, and the water inlet end of current limliting gully-hole touches with corresponding diaphragm.
A kind of situation, the every equal horizontally set of described product water arm, these produce the water arm and form a line.
Another kind of situation, every described product water arm all is obliquely installed, and these produce, and the water arm intersects mutually, being interconnected is netted.As preferably, the acute angle angle between every described product water arm and the horizontal plane is 45 degree.
During work, sewage produces water and penetrates into film outside diaphragm, enters by the current limliting gully-hole and produces the water arm, and be collected to the product supply mains on both sides along product water arm.Produce the water flux purpose of equiblibrium mass distribution more in order to reach, this membrane component structure also must satisfy following requirement:
The first, needs are selected the membrane material of suitable flux, adopt the film that the aperture is little, porosity is big as far as possible, because the unit membrane area flux of the film that the aperture is too big is excessive, can't effectively be limited, be easy to generate unbalanced problem, and the little film of porosity is easy to be blocked up by dirt.The optimum range in the aperture of diaphragm is 0.1～0.4um, and porosity requires greater than 80%.
Second, because film unit are aquifer yield is much larger than the required critical flux of membrane component, too much in order to limit local aquifer yield, before film infiltration product water enters product water arm, must be through the current limliting gully-hole, the aperture of current limliting gully-hole, quantity with and relevant with the actual aquifer yield of film unit are with the parameters such as ratio of membrane area.Actual aquifer yield is more high, and the aperture of choosing the current limliting gully-hole is more little, and number density can suitably be loosened, and membrane area just can be bigger.At the micro-filtration membrane of 0.1～0.4um, best current limliting gully-hole pore diameter range 0.5～lmm, pitch of holes 3～lOmm.In order to reach the requirement of producing hydrologic(al) budget, a quantity of producing water arm upper flow gully-hole is limited, and optimal number should be below 150.
The 3rd, product water arm diameter of section with two-sided a plurality of current limliting gully-holes also has certain requirement, its area of section requires the area of passage much larger than the current limliting gully-hole, and proper ratio requires greater than 20:1, keeps in balance substantially with the product water flux that guarantees each current limliting gully-hole.
Four, the area of passage of current limliting gully-hole is 1/36～l/400 with the ratio of unit membrane filter area, and is subjected to the restriction of membrane flux, and membrane flux is more high, means that the current limliting gully-hole should be more tiny, and the membrane area of service should be more big;
The 5th, the diverse location that produces the water arm also has distance apart from the water side, if will keep water balance, water outlet can be designed as both direction.Since produce the water arm arbitrarily a bit apart from the both direction water side be identical apart from sum, we can think that " apart from resistance " that water is produced in its optional position totally is identical, therefore just can guarantee its product hydrologic(al) budget.
Six, in order to guarantee balanced water outlet, it is also identical with above-mentioned relation with the relation of producing the supply mains that many rows produce the water arm, and arranging number and producing the water arm and produce supply mains's sectional area ratio all needs controlled.Product water arm surpasses 200 rows, and product water arm and product supply mains sectional area ratio should be less than l:10, to guarantee that arrange reach equilibrium (maximum difference＜5%) more between the product water flux that produces the water arms up and down.
Seven, a plurality of membrane component permutation and combination become membrane module, and the product aquaporin of membrane module structure and subsequent technique is progressively " expansion " also, break off to exempt from unbalanced phenomena and produce.
The invention has the beneficial effects as follows: the present invention is a kind of uniform flat membrane component of water flux that produces, this flat membrane component can be realized the relative equilibrium that each unit area film of face produces water flux, restrict the appearance of overcritical flux phenomenon, not only help to improve the integral level of film product critical flux, reduce cost of investment, also help to cut down the consumption of energy, save operating cost.
Description of drawings
Fig. 1 is the Facad structure schematic diagram of embodiments of the invention 1;
Fig. 2 be Fig. 1 B-B to cross-sectional view;
Fig. 3 is the Facad structure schematic diagram of embodiments of the invention 2;
Fig. 4 be Fig. 3 D-D to cross-sectional view.
In the drawings: the 1-substrate; The 2-diaphragm; 3-produces the supply mains; 4-produces the water arm; 5-current limliting gully-hole.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in detail.
Example one
Referring to Fig. 1, Fig. 2, the aperture of current limliting gully-hole 5 is 1mm, every sectional area that produces water arm 4 is 4 mm χ 4mm, the quantity of the current limliting gully-hole 5 of the single face of single product water arm 4 is 100, pitch of holes is 4mm, and 200 product water arms 4 are and are horizontally disposed with, and are parallel to each other, completely cut off mutually, and conflux and enter both sides total water producing pipe longitudinally, the sectional area that produces supply mains 3 is 40mm χ 5m.
In the specific implementation, adopt the universal product, adopt ultrasonic wave, hot melt or gluing mode and substrate 1 to form the flat membrane component that seals as the periphery that is assembled into 1, two diaphragm 2 of substrate by hollow sheeting, ten thousand logical plates and moulding.
Example two
Referring to Fig. 3, Fig. 4, the aperture of current limliting gully-hole 5 is 1mm, every sectional area that produces water arm 4 is 4 mm χ 4mm, 100 of the quantity of the current limliting gully-hole 5 of the single face of single product water arm 4, pitch of holes is 4mm, produces water arm 4 and is obliquely installed, and 100 row's product water arms intersect mutually, are interconnected, and it is netted to be " x ", produce water arm 4 and produce supply mains 3 longitudinally along 45 degree directions connections, the sectional area that produces supply mains 3 is 40 mm χ 5mm.
In the specific implementation, adopt existing product, the flat membrane component that adopts ultrasonic wave, hot melt or gluing mode and substrate 1 formation to seal as the plastic filtering net of the cold solid machine-shaping of pyrocondensation and periphery that moulding is assembled into 1, two diaphragm 2 of substrate.
Should be noted that at last; above content is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; the simple modification that those of ordinary skill in the art carries out technical scheme of the present invention or be equal to replacement does not all break away from essence and the scope of technical solution of the present invention.
Claims (8)
1. one kind is produced the uniform flat membrane component of water flux, constituted by substrate and 2 diaphragms that are arranged at this substrate rear and front end face, the periphery of 2 diaphragms is connected with substrate, form close cavity between 2 diaphragms and the substrate, it is characterized in that: the left and right sides of described substrate is provided with two and produces the supply mains, described substrate evenly is provided with the product water arm of many hollows, two ends extend to two respectively and produce the supply mains place about every product water arm, and two ends are communicated with corresponding product supply mains respectively about every product water arm, product water arm is right against former and later two diaphragms and evenly is provided with a plurality of current limliting gully-holes on the length direction of this product water arm, and the water inlet end of current limliting gully-hole touches with corresponding diaphragm.
2. the uniform flat membrane component of product water flux according to claim 1 is characterized in that: the every equal horizontally set of described product water arm, these produce water arms and form a line.
3. the uniform flat membrane component of product water flux according to claim 1, it is characterized in that: every described product water arm all is obliquely installed, and these produce, and water arms intersect mutually, being interconnected is netted.
4. the uniform flat membrane component of product water flux according to claim 3 is characterized in that: the acute angle angle between every described product water arm and the horizontal plane is 45 degree.
5. according to claim 1,2, the uniform flat membrane component of 3 or 4 described product water fluxes, it is characterized in that: the pore diameter range of described diaphragm is 0.1～0.4um, and porosity is greater than 80%.
6. the uniform flat membrane component of product water flux according to claim 5, it is characterized in that: the pore diameter range of described current limliting gully-hole is 0.5～lmm, and pitch of holes is 3～lOmm, and a quantity of producing the current limliting gully-hole on the water arm is below 150.
7. the uniform flat membrane component of product water flux according to claim 6 is characterized in that: produce the ratio of area of passage of the area of section of water arm and current limliting gully-hole greater than 20:1.
8. the uniform flat membrane component of product water flux according to claim 7 is characterized in that: produce the quantity of water arm less than 200, the sectional area that produces the water arm and the ratio of the sectional area that produces the supply mains are less than l:10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310227864.2A CN103239999B (en) | 2013-06-08 | 2013-06-08 | The flat membrane component that a kind of permeant flux is uniform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310227864.2A CN103239999B (en) | 2013-06-08 | 2013-06-08 | The flat membrane component that a kind of permeant flux is uniform |
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| CN103239999A true CN103239999A (en) | 2013-08-14 |
| CN103239999B CN103239999B (en) | 2016-07-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108246108A (en) * | 2018-02-28 | 2018-07-06 | 江苏沛尔膜业股份有限公司 | A kind of flat membrane component of double outlets |
| CN111229045A (en) * | 2018-11-29 | 2020-06-05 | 清大国华环境集团股份有限公司 | Combined supporting plate, membrane element and membrane bioreactor comprising same |
| CN112108009A (en) * | 2020-10-13 | 2020-12-22 | 上海希沃环境科技有限公司 | Polytetrafluoroethylene membrane and hydrophilic treatment method and application thereof |
| CN117815917A (en) * | 2024-03-04 | 2024-04-05 | 天津君耀膜科技有限公司 | Integrated membrane module for sewage treatment |
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| US20080156730A1 (en) * | 2005-02-28 | 2008-07-03 | Alfa Laval Corporate Ab | Permeate Spacer Module |
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- 2013-06-08 CN CN201310227864.2A patent/CN103239999B/en not_active Expired - Fee Related
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108246108A (en) * | 2018-02-28 | 2018-07-06 | 江苏沛尔膜业股份有限公司 | A kind of flat membrane component of double outlets |
| CN111229045A (en) * | 2018-11-29 | 2020-06-05 | 清大国华环境集团股份有限公司 | Combined supporting plate, membrane element and membrane bioreactor comprising same |
| CN112108009A (en) * | 2020-10-13 | 2020-12-22 | 上海希沃环境科技有限公司 | Polytetrafluoroethylene membrane and hydrophilic treatment method and application thereof |
| CN112108009B (en) * | 2020-10-13 | 2022-04-22 | 上海希沃环境科技有限公司 | Polytetrafluoroethylene membrane and hydrophilic treatment method and application thereof |
| CN117815917A (en) * | 2024-03-04 | 2024-04-05 | 天津君耀膜科技有限公司 | Integrated membrane module for sewage treatment |
| CN117815917B (en) * | 2024-03-04 | 2024-04-30 | 天津君耀膜科技有限公司 | Integrated membrane module for sewage treatment |
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| CN103239999B (en) | 2016-07-13 |
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