CN1887733A - Integral microporous filtering method and device for water treatment - Google Patents
Integral microporous filtering method and device for water treatment Download PDFInfo
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- CN1887733A CN1887733A CN 200510080206 CN200510080206A CN1887733A CN 1887733 A CN1887733 A CN 1887733A CN 200510080206 CN200510080206 CN 200510080206 CN 200510080206 A CN200510080206 A CN 200510080206A CN 1887733 A CN1887733 A CN 1887733A
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Abstract
The present invention relates to water treatment, and is especially integral microporous filtering method and device for treating low permeating oil field water flooding, sewage and high standard water. The device of the present invention is one closed container with one filtering layer of active carbon fiber felt, one 5 micron level polyethylene filtering plate, and one hollow fiber membrane assembly of 0.2-0.4 micron pore size successively packed from the water inlet to the water outlet. The present invention can treat water in different purifying standards and reach different treating amount.
Description
Technical field
The present invention relates to a kind of water treatment method and device thereof of being used for.Relate in particular to the integral microporous filtering method and the device thereof of a kind of water injection in low-permeability oilfield water conditioning, wastewater treatment and reuse, the water treatment of high standard usefulness.
Background technology
In the world, the low permeability oil field resource is very abundant.Domestic in China, the distribution of low permeability oil field is also very extensive.Therefore, the exploitation of low permeability oil field has critical role in the current and following oil-field development of China.
One of gordian technique of LOW PERMEABILITY OILFIELD DEVELOPMENT guarantees that exactly injection water quality is up to standard.The water quality of water injection in low-permeability oilfield standard generally will reach following index: total suspended solids smaller or equal to 1mg/l, grain diameter intermediate value smaller or equal to 1 micron, smaller or equal to oil-containing 5mg/l.Because therefore having relatively high expectations of water injection in low-permeability oilfield water quality standard, study a kind of membrane separation technique of suitable water injection in low-permeability oilfield water conditioning, become the task of top priority of LOW PERMEABILITY OILFIELD DEVELOPMENT.Therefore need the draining after a kind of technology reliable more, economical and convenient is handled oil field extracted water and made processing to reach the water injection in low-permeability oilfield standard.
Mould material is a kind of porous media material.The membrane sepn process is exactly the solvent process that the part solute in the processed feed liquid is trapped by film medium under pressure promotes in the processed feed liquid.General film treatment facility has very strict requirement to influent quality, needs to be equipped with a large amount of pre-processing devices, and long flow path, occupation of land is many, operational administrative is complicated.Therefore, membrane separation technique is mainly used in handling the field of clear water at present.In addition, because shortage of water resources has become the important factor of restriction China Sustainable development, it is imperative therefore greatly developing the wastewater treatment and reuse technology.Using membrane technology and carry out sewage disposal, can guarantee that effluent quality reaches reuse standard, is the robust techniques that realizes sewage recycling.
Chinese patent CN1451610A discloses a kind of membrane separation technique of utilizing and has carried out oil production waste water in oil field advanced treatment and cyclic utilization method.This method adopts micro-filtration or supermicro filtration membrane separation system that the suspended substance in the oil extraction waste water, CODcr (chemical oxygen demand), oil, polymkeric substance are removed; Water after the processing passes through nanofiltration or reverse osmosis again, removes salinity and small molecules oil in the water; At last with produced water disposal to being recycled into the oil field oil recovery process and being used to cooperate the polymkeric substance water.But the shortcoming of this method is: after after oil production waste water in oil field process micro-filtration or the uf processing, also need to pass through nanofiltration or reverse-osmosis treated again, just can reach waterflooding requirement.Because this method complex disposal process and cost are higher, thereby are limiting its use aspect technology and economical two.
In addition, the microfiltration membrane that discloses a kind of papermaking midcourse wastewater among the Chinese patent CN1486936A is separated and reuse technology.This technology adopts the middle-stage wastewater that produces in micro-filtrate membrane filtration papermaking washing, screening, the bleaching process.Its membrane pore size scope of selecting for use is 0.1～100 micron, and rete is by aluminum oxide or the preparation of zirconium white inorganic materials, and filter back water can be used in occasions such as washing, cooling under certain operation condition.This invention relates to this specific waste water microfiltration membrane isolation technique of papermaking midcourse wastewater, thereby its shortcoming is: 1. specific aim is too strong, is difficult to generally promote; 2. in above-mentioned method, because membrane module itself is higher to environmental requirement, general all need the film treatment facility is placed on have heating, in the factory building of ventilation, lighting condition, thereby improved the cost of application of membrane, be difficult to adapt to on-the-spot relatively harsh environmental conditions, limited its range of application; 3. in addition, in above-mentioned method, do not solve film well and clean problem, film is short work-ing life, thereby does not have advantage economically.
Japanese Patent JP4022491A discloses a kind of process for purifying water, and this method has proposed to make water earlier by comprising the adsorbent layer of activated carbon, is 0.01～0.05 micron filtering membrane then by the aperture, and then passes through the operational path of a hollow fiber film assembly.Although this method preprocessing process is simple, installation cost is low, but still exists the film treatment facility and need be placed on indoor, as to be difficult to adapt to abominable site environment shortcoming.
In addition, when the processing of various high standard waters such as tap water, process water etc., existing microfiltration membrane technology owing to independently carry out also existing aspect the water treatment to influent quality requirement height, the backwash and regeneration ability is relatively poor and to using envrionment conditions reason such as have relatively high expectations, mostly, range of application and effect have been limited greatly as the pre-treatment of reverse osmosis.
Summary of the invention
The objective of the invention is in order to overcome the defective of prior art, a kind of cost is low, simple to operate, can adapt to abominable site environment integral microporous filtering method that is used for water treatment and device thereof are provided.
One of the present invention's the integral microporous filtering method that is used for water treatment is achieved in that
The integral microporous filtering method that is used for water treatment of the present invention comprises following consecutive steps,
(1) makes the filtering layer of former water, with oil in water emulsion in the planar water and dissolved organic matter by an active carbon fiber felt;
(2) the former water after above-mentioned adsorption treatment is 5 micron-sized polyethylene (UHMWPE) filter plates by an aperture, with the macrobead suspended solid thing in the trap water;
(3) through above-mentioned adsorption treatment and the former water of holding back processing by the organic polymer hollow fiber film assembly that a membrane pore size is the 0.2-0.4 micron, obtain treating water;
Above steps is carried out in a closed container.
The present invention's two the integral microporous filtering device that is used for water treatment is achieved in that
The integral microporous filtering device that is used for water treatment of the present invention is a closed container, and described closed container comprises:
An active carbon fiber felt filtering layer that is fixed in interior, the close feed-water end of closed container;
One be fixed in the closed container, the aperture after above-mentioned active carbon fiber felt filtering layer is 5 micron-sized polyethylene (UHMWPE) filter plates;
One be fixed in the closed container, the organic polymer hollow fiber film assembly after above-mentioned polyethylene (UHMWPE) filter plate, membrane pore size is the 0.2-0.4 micron;
The feed-water end top of described closed container is provided with the interface of getting rid of supernatant, and the bottom is provided with the interface of getting rid of hypostasis.
The present invention is packaged with pretreatment unit and two sections main body processing units of hollow fiber capillary film assembly successively according to general water treatment process characteristics from the feed-water end to the water side in a closed container.Described closed container can be selected various withstand voltage materials as required for use, for example: materials such as metal, engineering plastics.
Described pretreatment unit comprises near the active carbon fiber felt filtering layer of feed-water end and 5 micron-sized polyethylene (UHMWPE) filter plates after this active carbon fiber felt filtering layer.Activated carbon fiber is formed through carbonization, activation by the Polymer Synthesizing fiber, compare with granular activated charcoal that to have specific surface area big, the pore prosperity, the absorption property height, characteristics such as desorption rate is fast, can use repeatedly, can adsorb oil in water emulsion and dissolved organic matter, wherein preferred viscose base activated carbon fiber felt.5 micron order polyethylene filter plates have certain pore size distribution, can hold back the macrobead suspended solid, have two kinds of effects of surface filtration and Depth Filtration concurrently.
In the device of the present invention, consider from succinct practicality, the angle that is easy to change, active carbon fiber felt and 5 microns polyethylene filter plates can be fixed between two perforation water distribution steel plates, and this perforation water distribution steel plate is fixed in the closed container again, forms an independently pretreatment unit.Former water is through behind the above-mentioned pretreatment unit, and water quality reaches the water inlet requirement of membrane module, the influence that can avoid film to be come the water variation water quality thus, the working condition of optimization subsequent film element.
Former water through the absorption of above-mentioned pretreatment unit, after holding back processing then enters film unit.Unit square rice cost is low, packing density is high from having, be convenient to characteristics such as recoil method cleaning considers, the film unit in apparatus of the present invention adopts organic polymer tubular fibre formula membrane module.This organic polymer tubular fibre formula membrane module can be by curving U to the hollow-fibre membrane of a lot of root external diameter 80-400 μ m, internal diameter 40-100 μ m, one end or two ends of fibrous bundle are cast tube sheet or end socket with Resins, epoxy, reinstall in the drum type pressure vessel and obtain; Also can adopt the linear pattern hollow-fibre membrane, an end opening, the other end is shut.In the device of the present invention, the organic polymer hollow fiber film assembly is the arrangement of horizontal row tubular type and is fixed on the retaining plate with holes, and described retaining plate is fixed in the closed container.Tubular fibre formula membrane module can adopt two kinds of external-compression type and inner presseds, and the present invention preferably adopts pending liquid to walk outside the film, and treatment solution enters effusive external-compression type in the film.
In apparatus of the present invention, the mould material concrete example of described organic polymer hollow fiber film assembly is as polymeric membranes such as: derivatived cellulose class, polysulfones, polyamide-based, polyester, polyolefins, fluoropolymers.Wherein preferred polyvinylidene difluoride (PVDF) (PVDF), this is because it has excellent chemical stability, radiation resistance, resistance to acids and bases, organic solvent resistance, resistance to crocking etc., adaptive faculty to temperature is strong, and has characteristics such as narrow pore size distribution range, aperture are even, voidage height.PVDF tubular fibre micropore filtering film utilizes phase inversion process production.
In addition, in the integral microporous filtering device of the present invention, be provided with the interface of getting rid of supernatant on the feed-water end top of described closed container, the bottom is provided with the interface of getting rid of hypostasis, and blowdown in time regularly is simple.By active carbon fiber felt, 5 micron order polyethylene (UHMWPE) filter plates, organic polymer hollow fiber film assembly after, from rising pipe send continuously by the treating water that obtains for pending water, and the dense water that contains impurity enters circulation through dense water receipts water pipe.
The present invention makes its becoming one microporous filter by all processing units are encapsulated in the closed container as mentioned above.The front end of closed container is a moist chamber, is full of the pending water of certain operating pressure; The rear end of closed container is for doing the chamber, and the protective membrane assembly is not influenced by the adverse circumstances.Therefore, this device has treatment facility (preceding half section) concurrently and the dual-use function of good Working environment (second half section) is provided for membrane module.Simultaneously this device can adapt to abominable site environment, do not need generally speaking to place it in indoor, thereby simplified application conditions greatly, to application places substantially without limits, can save a large sum of support expense, reduce processing cost.
Advantage of the present invention:
1. because device of the present invention is the treatment facility body, be again the enclosed structure of membrane module, make membrane module be in the Working environment of a sealing.The field application that this is abominable to envrionment conditions has crucial meaning.
2. owing to the selected material previously treated of the present invention is cheap, the structural shape that is adopted is easy to change, and makes whole film treating processes succinct more practical.Thisly carry the pretreated model of integration, not only optimized the operational conditions of subsequent film assembly, and, be the form that all users take like a shot because the compact construction of equipment own can be saved occupations of land, simplification treatment scheme.
3. be used for hollow-fibre membrane device form of the present invention, big, the back-washable regeneration of packing density relatively is fit to large-scale industrial application.
Description of drawings
Fig. 1 is an integral microporous filtering schematic representation of apparatus of the present invention
Illustration
1: closed container 2: the micron-sized polyethylene (UHMWPE) filter plate 4 of active carbon fiber felt filtering layer 3:5: hollow fiber film assembly 5: perforation water distribution steel plate 6: retaining plate 7: the interface 8 of getting rid of supernatant: the interface 9 of getting rid of hypostasis: dense water is received water pipe
Embodiment
Following with reference to Fig. 1 to the detailed description of the invention.
As shown in Figure 1, in a horizontal closed container 1, from the feed-water end to the water side, be packaged with active carbon fiber felt filtering layer 2,5 micron order polyethylene (UHMWPE) filter plates 3 successively, the aperture is the polyvinylidene difluoride (PVDF) hollow fiber film assembly 4 of 0.2-0.4 micron.Described active carbon fiber felt filtering layer 2 and 5 micron order polyethylene (UHMWPE) filter plates 3 are fixed between two perforation water distribution steel plates 5, and this perforation water distribution steel plate 5 is fixed in the closed container 1.Described polyvinylidene difluoride (PVDF) hollow fiber film assembly 4 is the arrangement of horizontal row tubular type and is fixed on the retaining plate with holes 6, and this retaining plate 6 is fixed in the closed container 1.Be provided with the interface 7 of getting rid of supernatant on the feed-water end top of closed container 1, the bottom is provided with the interface 8 of getting rid of hypostasis.
Former water enters closed container 1 from water inlet pipe, then continuously by behind active carbon fiber felt filtering layer 2,5 micron order polyethylene (UHMWPE) filter plates 3, the polyvinylidene difluoride (PVDF) hollow fiber film assembly 4, the treating water that obtains is sent from rising pipe, and dense water is received water pipe 9 through dense water and entered circulation.
To handling the occasion of oil field extracted water, under the situation of water inlet oil-containing＜30mg/l and SS＜20mg/l, effluent quality can reach the water injection in low-permeability oilfield water quality standard, i.e. oil-containing＜5mg/l, SS＜1mg/l, grain diameter 1 μ m.
To handling the water outlet of municipal wastewater after two stage biological is handled, effluent quality can reach China's miscellaneous water water quality standard, and promptly turbidity 1-2 degree, BOD5 are that 5-10mg/l, COD are 30-50mg/l, coliform 1-3.
To pretreated occasion as reverse-osmosis treated, can reach its influent quality requirement fully, prolong reverse osmosis membrane work-ing life.
To the application scenario that drinking water deep is handled, when using city tap-water to make former water, effluent quality reaches China's purified drinking water water quality standard.
Claims (6)
1. an integral microporous filtering method that is used for water treatment is characterized in that, this method comprises following consecutive steps:
(1) makes the filtering layer of former water, with oil in water emulsion in the planar water and dissolved organic matter by an active carbon fiber felt;
(2) water after above-mentioned adsorption treatment is 5 micron-sized polyethylene (UHMWPE) filter plates by an aperture, with the macrobead suspended solid thing in the trap water;
(3) through above-mentioned adsorption treatment and the water of holding back processing by the organic polymer hollow fiber film assembly that a membrane pore size is the 0.2-0.4 micron, obtain treating water;
Above steps is carried out in a closed container.
2. integral microporous filtering device that is used for water treatment is characterized in that:
Described integral microporous filtering device is a closed container (1), comprising:
Active carbon fiber felt filtering layer (2) near feed-water end;
Being positioned at above-mentioned active carbon fiber felt filtering layer (2) aperture afterwards is 5 micron-sized polyethylene (UHMWPE) filter plates (3);
Be positioned at the organic polymer hollow fiber film assembly (4) that above-mentioned polyethylene (UHMWPE) filter plate (3) membrane pore size afterwards is the 0.2-0.4 micron;
The feed-water end top of described closed container (1) is provided with the interface (8) of getting rid of supernatant, and the bottom is provided with the interface (9) of getting rid of hypostasis.
3. integral microporous filtering device as claimed in claim 2 is characterized in that:
Described active carbon fiber felt filtering layer (2) adopts the viscose base activated carbon fiber felt.
4. integral microporous filtering device as claimed in claim 2 is characterized in that:
Described active carbon fiber felt filtering layer (2) and 5 micron-sized polyethylene (UHMWPE) filter plates (3) are fixed between two perforation water distribution steel plates (5), and described perforation water distribution steel plate (5) is fixed in the closed container (1).
5. integral microporous filtering device as claimed in claim 2 is characterized in that:
Described organic polymer hollow fiber film assembly (4) is the arrangement of horizontal row tubular type and is fixed on the retaining plate with holes (6), and described retaining plate (6) is fixed in the closed container (1).
6. integral microporous filtering device as claimed in claim 5 is characterized in that:
Described organic polymer hollow fiber film assembly (4) adopts external-compression type.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100802060A CN100375720C (en) | 2005-06-30 | 2005-06-30 | Integral microporous filtering method and device for water treatment |
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| CNB2005100802060A CN100375720C (en) | 2005-06-30 | 2005-06-30 | Integral microporous filtering method and device for water treatment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105477919A (en) * | 2015-12-28 | 2016-04-13 | 安徽华骐环保科技股份有限公司 | Sewage pretreatment microfiltration equipment and method |
| WO2017020224A1 (en) * | 2015-08-03 | 2017-02-09 | Honeywell International Inc. | Media and devices for water filtration |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0653240B1 (en) * | 1993-05-17 | 2003-09-03 | Kubota Corporation | Method of manufacturing a filtration film element |
| JPH11333264A (en) * | 1998-05-29 | 1999-12-07 | Yuasa Corp | Membrane element and membrane separation device using the element |
| CN2499386Y (en) * | 2001-08-07 | 2002-07-10 | 任连库 | Pipeline type water purifier |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017020224A1 (en) * | 2015-08-03 | 2017-02-09 | Honeywell International Inc. | Media and devices for water filtration |
| CN108349754A (en) * | 2015-08-03 | 2018-07-31 | 霍尼韦尔国际公司 | Water filtration media and device |
| CN105477919A (en) * | 2015-12-28 | 2016-04-13 | 安徽华骐环保科技股份有限公司 | Sewage pretreatment microfiltration equipment and method |
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| CN100375720C (en) | 2008-03-19 |
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