CN104548943B - A kind of compound immersion type membrane component - Google Patents
A kind of compound immersion type membrane component Download PDFInfo
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- CN104548943B CN104548943B CN201310468381.1A CN201310468381A CN104548943B CN 104548943 B CN104548943 B CN 104548943B CN 201310468381 A CN201310468381 A CN 201310468381A CN 104548943 B CN104548943 B CN 104548943B
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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 present invention provides a kind of compound immersion type membrane component, compared with the prior art, invention increases the shock resistance of film, energy efficient, greatly improving sewage treating efficiency, when the compound immersion type membrane component of the present invention is disposed of sewage, sewage is through after flat sheet membrane, through the further essence filter of ultra-filtration membrane, the final product water water quality of membranous system is made to meet or exceed the water inlet index of reverse osmosis membrane.
Description
Technical field
The present invention relates to a kind of membrane module used at membrane bioreactor or immersion ultra-filtration process, be applicable to sanitary sewage, the environmental protection fields such as petrochemical wastewater treatment and reuse, in particular to new membrane assembly technology.
Background technology
Membrane sepn is a kind of screening process, this process is relevant to membrane pore size size, filtration drive power is the pressure difference of film both sides, under pressure, when sewage flows through film surface, the numerous tiny micropore gathered in film surface only allows water and small-molecule substance to pass through and become penetrating fluid, and the material that in stoste, volume is greater than film surface micropore footpath is then trapped, become concentrated solution, realize the object of the isolation and identification to stoste with this.
Separatory membrane, because of the stuctures and properties of its uniqueness, is a dark horse in environment protection and resource regeneration, and in environmental engineering, particularly wastewater treatment and Treated sewage reusing aspect have a wide range of applications. Membrane separation technique is classified according to pore size, is followed successively by micro-filter, ultrafiltration, nanofiltration and reverse osmosis.
The pore diameter range of microfiltration membrane is at 0.1��1 micron, ultra-filtration membrane aperture is between 0.05um to 1nm, the characteristic that retains of ultra-filtration membrane characterizes with the molecular weight cut-off to standard organism, usual molecular weight cut-off scope is 1000��300000 dalton, the removal effect of small molecules organic pollutant is not obvious, do not reach the requirement of advanced treatment. The aperture of nanofiltration membrane is several nanometers, and inorganic salt, in the scope of 80��1000 dalton, are had certain rejection by molecular weight cut-off. Reverse osmosis is the most high-end single-item handling technology of water treatment field, it is possible to stop that all solvability salt and molecular weight are greater than the organism of 100 dalton, better through the effluent quality of reverse-osmosis treated.
Membrane bioreactor (MBR) is that membrane technique and dirty water living creature processing technique organically combine the new process for treating waste water produced. it it is a kind of important means of sewage recycling. MBR method in sewage disposal is by surpassing in membrane separation technique, the sewage disposal new and high technology that micro-filter technology and activated sludge process organically combine, mainly contain membrane module, bio-reactor, mass transport three part forms, its operation logic utilizes microorganisms a large amount of in reactor various organism in degradation of sewage effectively, water quality is purified, and replace the settling tank in traditional technology by membrane separation unit, improve the efficiency of solid-liquid separation, thus obtain the water outlet of high-quality, substantially the sludge bulking that traditional activated sludge process exists is solved, the effluent quality that the factors such as sludge concentration is low cause does not reach the problem that Treated sewage reusing requires.
It is applied widely for membrane bioreactor (MBR), integrated operation cost is low, and stable system performance, floor space is little. In application aspect, it both can also can be used on the sewage disposal in sanitary sewage with having in industrial sewage. Industrial sewage aspect, is mainly used in comprising the process of the high densitys such as pharmacy waste water, wastewater from chemical industry, food sewage, organic wastewater with difficult degradation thereby.
The petrochemical wastewater feature that to have that the waste water water yield is big, pollutant component is complicated, water quality, the water yield fluctuate big, waste water contains finite concentration COD, heterotrophic bacterium, petroleum-type, Fe and Mn, suspension solid substance, salt grade, and water body can be caused severe contamination by direct discharge.
Adopt membrane bioreactor (MBR) sewage disposal petrifaction sewage can reach discharge index. Petrochemical industry water consumption is very big, and petroleum chemical enterprise has 60% to be in water resources scarce areas, after sewage disposal, direct discharge does not obviously meet economic interests demand, also needs subsequent disposal to reaching the current demand of Treated sewage reusing standard so prior art also exists sewage after MBR processes. The present invention can provide a kind of in conjunction with the membrane module of MBR and ultra-filtration membrane characteristic, sewage through pre-treatment more thus membrane module filter just can directly reach Treated sewage reusing standard, reduction cost of water treatment, it is to increase water treatment efficiency.
In addition, there is the deficiency that aeration energy consumption is high in MBR biomembrance process process waste water. The membrane module of the present invention can improve aeration structure, reduces aeration energy consumption, will improve the economic benefit of MBR embrane method process waste water further.
Summary of the invention
The present invention provides a kind of compound immersion type membrane component, comprising:
1) frame support, material is by ABS engineering plastics injection moulding, and profile is the rectangular parallelepiped of thickness between 10��20mm, on, lower both ends of the surface opening, for hollow-fibre membrane silk of casting. Before, the frame on rear two sides arranges groove, or coarse lines so as to inlay, hot weld or bonding flat sheet membrane.
2) two groups of flat sheet membrane: aperture is 0.1��1.0 micron, as preferably, the scope in aperture is between 0.2��0.5 micron, and pure water flux is 800��1200L/m2.bar.hr��
One group of flat sheet membrane is polyester non-woven fabric, adopts the preparation of submergence inversion of phases technique, and supporting layer is polyester non-woven fabric, and effect is the comparatively large vol waste occurred under suspended particle and abnormal conditions in interception sewage.
Another group flat sheet membrane is polyvinylidene fluoride microporous filtering film, has the complete network-like section structure of overall asymmetry, and filtering accuracy is 0.1��1.0 micron.
Before and after framework, there is grid on two sides, flat sheet membrane to inlay, hot weld or bonding in the way of be fixed on before and after support two-sided.
3) hollow-fibre membrane being encapsulated in frame support by flat sheet membrane, polyvinylidene fluoride (PVDF) ultrafiltration membrane, molecular weight cut-off that external diameter is 0.8��1.5 millimeter are 50,000��150,000 dalton.
Hollow-fibre membrane can encapsulate many groups, such as 2 groups, 3 groups, 5 groups at the most, can greatly increase the filtration efficiency of film and the shock resistance of film more than the hollow-fibre membrane of a group, but in order to economic and practical application consideration, general hollow-fibre membrane package group number is no more than 5 groups.
Hollow-fibre membrane, casts in the upper of frame support by tackiness agent such as Polyurethane, hot melt adhesive or silica gel, in lower groove.
Burying tracheae at regular intervals in advance in the lower end slot body of framework, each tracheae is connected with gas source after being connected to house steward. The tracheae being arranged in film tow connects aeration head.
Compared with prior art, the key distinction is the compound immersion type membrane component of the present invention:
Can cast between flat sheet membrane before and after frame thickness 10-20mm and organize hollow-fibre membrane more, compared with the manifold type plate film assembly of prior art, prior art is coupled in flat sheet membrane and arranges one group of hollow-fibre membrane, its filtration efficiency is not as good as the present invention, and middle plateform film of the present invention to inlay, hot weld or bonding in the way of be fixed on before and after support two-sided, the film that the film of fixing like this mode is more fixing than coupling mode enhances impact property greatly.
Burying tracheae at regular intervals in advance in the lower end slot body of framework, dispersion aeration, it is to increase aeration utilization ratio, has saved energy consumption.
Each tracheae is connected with gas source after being connected to house steward. The tracheae being arranged in hollow-fibre membrane film tow connects aeration head. Compared with existing utility model patent CN201529494U; aeration tube is arranged in hollow-fibre membrane film tow by the present invention, aeration from lower to upper, and hollow-fibre membrane surface is washed away by air-flow fully; remove hollow-fibre membrane surface contamination, it is possible to effectively protect hollow-fibre membrane.
Aeration gas flow, by outwards having recoil effect in flat sheet membrane, removes flat sheet membrane surface contaminant.
Flat sheet membrane is polyvinylidene fluoride microporous filtering film, there is the complete network-like section structure of overall asymmetry, supporting layer is polyester non-woven fabric, aeration gas flow is when recoiling to flat sheet membrane, air-flow can be decomposed into tiny bubble by flat sheet membrane surface mesh, its effect can be aerobic bacteria dispersion oxygen supply in pond, it is possible to the effective aerobic bacteria that improves, to the Degradation of sewage, improves sewage treating efficiency greatly.
When the compound immersion type membrane component of the present invention is disposed of sewage, sewage is through, after flat sheet membrane, through the further essence filter of ultra-filtration membrane, making the final product water water quality of membranous system meet or exceed the water inlet index of reverse osmosis membrane.
Accompanying drawing explanation
Fig. 1 is the structural representation of the compound immersion type membrane component of the present invention; 1,5 framework, 2 flat sheet membrane, 3 solarization air caps, 4 hollow-fibre membranes, 6 frame bases.
Fig. 2 is the front view of the compound immersion type membrane component of the present invention; 7,9 framework, 8 hollow-fibre membranes.
Fig. 3 is A-A and the B-B directional profile schematic diagram of the compound immersion type membrane component of the present invention; 10 frameworks, 11 hollow-fibre membranes, 12 water outlet directions, 13,14 water inlet directions, 15,16 frameworks, 17 solarization air caps.
Fig. 4 is the C-C directional profile schematic diagram of the compound immersion type membrane component of the present invention; 18 solarization air caps, 19 hollow-fibre membranes.
Embodiment
In the following description, for reader can understand the application better, detailed description is given below in conjunction with accompanying drawing further to details aspect of the present invention.
Embodiment of the present invention relates to a kind of compound immersion type membrane component, is applied to MBR membrane bioreactor sewage disposal and is separated with filtering flow. The structure of this compound immersion type membrane component as shown in Figure 1, comprising:
Dull and stereotyped diaphragm and non-woven fabrics (2), flat sheet membrane is polyvinylidene fluoride microporous filtering film, has the complete network-like section structure of overall asymmetry, aperture is 0.1��1.0 micron, as preferably, the scope in aperture is between 0.2��0.5 micron, and pure water flux is 800��1200L/m2.Bar.hr, supporting layer is non-woven fabrics.
Flat sheet membrane is fixed on before and after support (5) (6) (7) two-sided to inlay, in the way of hot weld or bonding (1) (9).
The material of frame support is by ABS engineering plastics injection moulding, and profile is the rectangular parallelepiped of thickness between 10��20mm, on, lower both ends of the surface opening (16) (20).
Before, the frame on rear two sides groove or coarse lines (2) (10) are set so as to inlay, hot weld or bonding flat sheet membrane.
Hollow-fibre membrane casts between frame support upper/lower terminal face by tackiness agent such as Polyurethane, hot melt adhesive or silica gel, and encapsulation is fixed on framework, (16) (20) in lower end fluting.
The external diameter of hollow-fibre membrane is 0.8��1.5 millimeter, and wall thickness is 0.2��0.3 millimeter. Adopting the preparation of submergence phase diffusion technique, be made up of polyvinylidene fluoride resin, have the complete network-like section structure of overall asymmetry, tensile strength is more than 4MPa, and extensibility is more than 100%.Molecular weight cut-off is 50,000��150,000 dalton, and bubbling pressure is greater than 0.3MPa. Pure water flux is greater than 300L/m2.bar.hr��
Burying tracheae (3) under framework in end slot body at regular intervals in advance, each tracheae is connected with gas source after being connected to house steward. In hollow-fibre membrane film tow, (18) arrange that tracheae connects aeration head.
With reference to embodiment of the present invention, to invention has been diagram and data description, it is possible in the form and details it is done various amendment, and does not deviate the scope of the invention.
Claims (9)
1. a compound immersion type membrane component, comprises frame formula engineering plastics support, cast in the hollow-fibre membrane between frame support upper/lower terminal face and to inlay, hot weld or bonding in the way of be fixed on flat sheet membrane two-sided before and after support, it is characterised in that:
A) material of frame support is by ABS engineering plastics injection moulding, and profile is the rectangular parallelepiped of thickness between 10��20mm, on, lower both ends of the surface opening, for hollow-fibre membrane silk of casting, the frame on forward and backward two sides arranges groove, or coarse lines so as to inlay, hot weld or bonding flat sheet membrane;
B) flat sheet membrane is polyvinylidene fluoride microporous filtering film, has the complete network-like section structure of overall asymmetry, and filtering accuracy is 0.1��1.0 micron;
C) hollow-fibre membrane being encapsulated in frame support by flat sheet membrane is the polyvinylidene fluoride (PVDF) ultrafiltration membrane of external diameter 0.8��1.5 millimeter, molecular weight cut-off is 50,000��150,000 dalton;
D) under condition of negative pressure, former water is through, after flat sheet membrane, through ultra-filtration membrane essence filter further, making the final product water water quality of membranous system meet or exceed the water inlet index of reverse osmosis membrane.
2. compound immersion type membrane component according to claim 1, it is characterised in that: the framework upper end fluting of frame support connects hollow-fibre membrane outlet conduit and produces water collection pipe road, and lower end fluting is used for fixing encapsulation hollow-fibre membrane.
3. compound immersion type membrane component according to claim 1, it is characterised in that: hollow-fibre membrane is made up of polyvinylidene fluoride resin, has complete overall asymmetry cell shape section structure, and tensile strength is more than 4MPa, and extensibility is more than 100%.
4. compound immersion type membrane component according to claim 1, it is characterised in that: the wall thickness of hollow-fibre membrane is 0.2��0.3 millimeter, adopts the preparation of submergence phase diffusion technique, and bubbling pressure is greater than 0.3MPa, and pure water flux is greater than 300L/m2��bar��hr��
5. compound immersion type membrane component according to claim 1, it is characterised in that: hollow-fibre membrane casts in the upper of frame support by Polyurethane, hot melt adhesive or silica gel tackiness agent, in lower groove.
6. compound immersion type membrane component according to claim 5, it is characterised in that: burying tracheae under described hollow-fibre membrane in end slot body at regular intervals in advance, each tracheae is connected with gas source after being connected to house steward, and the tracheae being arranged in film tow connects aeration head.
7. compound immersion type membrane component according to claim 1, it is characterised in that: flat sheet membrane aperture is 0.1��1.0 micron, and pure water flux is 800��1200L/m2��bar��hr��
8. compound immersion type membrane component according to claim 7, it is characterised in that: the scope in flat sheet membrane aperture is between 0.2��0.5 micron.
9. according to compound immersion type membrane component according to claim 7, it is characterised in that: flat sheet membrane adopts the preparation of submergence inversion of phases technique, and supporting layer is polyester non-woven fabric.
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| CN201310468381.1A CN104548943B (en) | 2013-10-09 | 2013-10-09 | A kind of compound immersion type membrane component |
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| CN201310468381.1A CN104548943B (en) | 2013-10-09 | 2013-10-09 | A kind of compound immersion type membrane component |
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| CN104548943B true CN104548943B (en) | 2016-06-08 |
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| CN109292965A (en) * | 2018-11-12 | 2019-02-01 | 中信环境技术（天津）有限公司 | A kind of new bio filter membrane and its application in filter plant |
| CN110420570A (en) * | 2019-08-06 | 2019-11-08 | 天津工业大学 | A kind of cuboid membrane module based on townhouse hollow fiber form nonwoven fabrics composite film |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1814553A (en) * | 2005-01-31 | 2006-08-09 | 中国科学院生态环境研究中心 | Combined membrance assembly |
| CN102642918A (en) * | 2012-04-28 | 2012-08-22 | 江苏大孚膜科技有限公司 | Coupled plate membrane component |
| CN103214085A (en) * | 2013-04-28 | 2013-07-24 | 沁园集团股份有限公司 | Membrane bioreactor for combining flat membrane and hollow fibrous membrane |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002320828A (en) * | 2001-04-27 | 2002-11-05 | Mitsubishi Kakoki Kaisha Ltd | Filter membrane system solid-liquid separator and waste water treatment equipment with the same |
| WO2012167000A2 (en) * | 2011-06-03 | 2012-12-06 | Celgard Llc | Flat panel contactors and methods |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1814553A (en) * | 2005-01-31 | 2006-08-09 | 中国科学院生态环境研究中心 | Combined membrance assembly |
| CN102642918A (en) * | 2012-04-28 | 2012-08-22 | 江苏大孚膜科技有限公司 | Coupled plate membrane component |
| CN103214085A (en) * | 2013-04-28 | 2013-07-24 | 沁园集团股份有限公司 | Membrane bioreactor for combining flat membrane and hollow fibrous membrane |
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