CN103638818B - A kind of interval spiral-wound filter and method - Google Patents
A kind of interval spiral-wound filter and method Download PDFInfo
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- CN103638818B CN103638818B CN201310608126.2A CN201310608126A CN103638818B CN 103638818 B CN103638818 B CN 103638818B CN 201310608126 A CN201310608126 A CN 201310608126A CN 103638818 B CN103638818 B CN 103638818B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 84
- 239000012528 membrane Substances 0.000 claims abstract description 66
- 238000001914 filtration Methods 0.000 claims abstract description 27
- 238000009295 crossflow filtration Methods 0.000 claims abstract description 22
- 238000003860 storage Methods 0.000 claims abstract description 14
- 235000012489 doughnuts Nutrition 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims description 22
- 239000000706 filtrate Substances 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000009825 accumulation Methods 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 description 14
- 239000000835 fiber Substances 0.000 description 10
- 230000004907 flux Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 239000003344 environmental pollutant Substances 0.000 description 5
- 238000009285 membrane fouling Methods 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000005374 membrane filtration Methods 0.000 description 4
- 210000002985 organ of corti Anatomy 0.000 description 4
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- 239000000356 contaminant Substances 0.000 description 3
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- 239000002904 solvent Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 210000003128 head Anatomy 0.000 description 2
- 238000009527 percussion Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 230000000541 pulsatile effect Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 238000011010 flushing procedure Methods 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
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- 229920003023 plastic Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a kind of interval spiral-wound filter and method, this device comprises membrane module and water circulation system, membrane module comprises housing, the outer press mold of doughnut and helical baffle, helical baffle is provided with in housing, on helical baffle, be provided with reserved storage area, between helical baffle and housing, form helical duct; The outer press mold of doughnut runs through helical baffle, and the upper and lower end of housing is respectively equipped with cross-flow entery and delivery port, the entrance of the corresponding helical duct of cross-flow water inlet, and the outlet of helical duct is communicated with cross-flow delivery port by reserved storage area; Water circulation system comprises the tank of pipeline connection successively, water circulating pump and pulse water flow generator, and pulse water flow generator and cross-flow water inlet pipeline connection, the water inlet end of tank is communicated with cross-flow water outlet pipeline.Filter type is that cross-flow filtration and dead-end filtration hocket.The present invention is easy to operate, reduction energy consumption, is easy to Automated condtrol, effective decelerating membrane pollution accumulation, prolonging service lifetime of film.
Description
Technical field
The present invention relates to a kind of UF membrane mode, particularly relate to the membrane filtering method in a kind of membrane separation technique and device thereof: cross-flow filtration and dead-end filtration hocket, in running, pulse water-feeding flows through spiral organ, causes feed liquid produce spiral flow and with film surface pollution thing, the motion of tangential and longitudinal both direction occur, complete the cleaning with face that enters of feed liquid, recover membrane flux.
Background technology
Membrane separation technique is a kind of promotion by outside energy or chemical potential, with selective through perforated membrane for separating medium, mixing material to be separated, classification and enrichment.Have without the advantage such as phase transformation, normal temperature or low-temperature operation, energy consumption be little.But, membrane pollution problem adjoint in membrane separating process, fouling membrane will cause the decline of membrane flux, reduce aquifer yield, shorten the service life of film, cause the increase of operating cost and water producing cost, a critical problem of therefore filter membrane application is exactly the problem of the membrane fouling and cleaning recovery caused by pollutant.
In UF membrane, when solute and particulate are by film, also exist simultaneously retain, adsorb, the blocking of fenestra, the formation of cake layer and concentration polarization the phenomenon such as generation, produce fouling membrane, cause membrane resistance to increase with filtration time, film permeation flux declines.It is generally acknowledged when feed liquid contacts with film one, pollute and just there occurs, in other words in membrane filtration processes, concentration polarization and fouling membrane phenomenon are unescapable, and so maintaining higher filtration flux just needs to control fouling membrane.
Can to be tried one's best by effective technological means the process of lessening membrane fouling, to reduce the degree of fouling membrane, improve system processing power, reduce operating cost.
Method in prevention and control fouling membrane mainly concentrates on and changes in former aqueous nature, improvement film character, operation conditions optimization and Membrane cleaning etc.: (1) changes former aqueous nature, suitable medicament is added wherein before raw water filtration, by changing the character of solvent or solute, film load and pollution can be alleviated.(2) chemical constitution of membrane material, hydrophily or hydrophobicity, charge, polarity or nonpolar, surface energy etc. all can affect the separating property of film.(3) by optimizing UF membrane operating condition, produce as temperature, pH value, flow velocity, operating pressure, filter type etc. can reduce fouling membrane, intensive filtration process.(4) Membrane cleaning is one of now the most frequently used mode, conventional cleaning method comprises physical cleaning and Chemical cleaning, the effect of physical cleaning generally will be worse than the effect of Chemical cleaning, but Chemical cleaning can cause the destruction of membrane material frequently, have a strong impact on the life-span of film, also may cause secondary pollution.
The general fashion of membrane filtration is cross-flow filtration and dead-end filtration two kinds:
Dead-end filtration refers under the driving of film both sides pressure differential, and solute and solvent are perpendicular to the motion of diffusion barrier direction, and solute tunicle retains, and solvent is separated by film.In dead-end filtration, main body feed liquid is identical with the permeate direction of motion.It is along with the increase of operating time, and fouling membrane can be more and more serious, and filtration resistance is increasing, and the infiltration rate of film will decline, and must periodically the stop cleaning or replacing film of carrying out film surface, it is step for filtering so omnidistance.
In cross-flow filtration process, main body feed liquid and film plane tangent flow, and the solute in feed liquid is trapped, and the vertical and face of permeate is flowed out by film, and thus cross-flow filtration is also referred to as tangential flow filtration.In cross-flow filtration process, the shearing force that feed liquid produces when flowing through film surface can be taken away the delay particle on face, pollution layer is remained in a thinner level, effectively can control concentration polarization and cake layer is piled up, so long-time operation still can keep higher membrane flux.Cross-flow filtration mode is compared to dead-end filtration mode, and fouling membrane cumulative speed slows down, but energy ezpenditure is comparatively large, the water yield requires higher.
The effect of above-mentioned filter type is subject to the restriction of condition own, needs a kind of relative efficiency, simple, easy-operating membrane filtration pattern method, makes the flux that film remains higher.
Summary of the invention
The object of this invention is to provide a kind of filter type overcoming existing hollow fiber form film easily to produce and the method and apparatus of the shortcoming of difficult pollution, it has higher treatment effect and better simply cleaning operation.
In order to realize the object of this foregoing invention, technical scheme of the present invention is as follows:
A kind of interval spiral-wound filter, comprise membrane module and water circulation system, described membrane module comprises housing, doughnut press mold and the helical baffle outward of setting, helical baffle is provided with at its inwall of housing inner close fitting, reserved storage area is provided with on helical baffle, the middle part of helical baffle is provided with stay pipe, forms the helical duct around stay pipe between helical baffle and housing; The outer press mold of described doughnut runs through helical baffle to be vertically located in housing, the lower end of the outer press mold of doughnut is fixed on the bottom of helical baffle, upper end is fixed by film head, and be connected with the filtrate (liquid on housing, the upper and lower end of housing is respectively equipped with cross-flow entery and delivery port, the entrance of the corresponding helical duct of described cross-flow water inlet, the outlet of helical duct is communicated with cross-flow delivery port by reserved storage area; Described water circulation system comprises the tank of pipeline connection successively, water circulating pump and pulse water flow generator, and described pulse water flow generator is by flow valve and cross-flow water inlet pipeline connection, and the water inlet end of tank is communicated with cross-flow water outlet pipeline.
Described pulse water flow generator comprises the magnetic valve of water tank and control impuls current origination interval, and described magnetic valve is connected with water outlet of water tank.
In device of the present invention, for obtaining good spiral effect, water inlet direction and the inner walls of described cross-flow water inlet are tangent.
Described helical baffle and inner walls gap are 1 ~ 3mm.
Membrane module internal upper part arranges certain headspace, i.e. reserved storage area, in order to the dead-end filtration water during guaranteeing inter-train pause.
In the present invention, spiral flow generation device is helical baffle.Hollow-fibre membrane, through helical baffle, for keeping hollow-fibre membrane and helical baffle without the breakage that rubs, adopting epoxide-resin glue bonding connection place, playing and stablize shock proof effect.
Helical baffle one-shot forming, there is hollow stay pipe at center, and helical baffle inside forms specific helical flow path.Width of blade is suitable with tubular shell radius, and impacting in blade has some holes, running through for hollow-fibre membrane.By the adjustment helical baffle blade number of turns, adjustable hydraulic detention time and water velocity.
Helical baffle is utilized to be because it has the advantages that to make current produce spiral flow, spiral flow with the horizontal and vertical directions of hollow-fibre membrane face on all there is active force, the power of vertical direction and horizontal direction award film surface pollution thing tangential on power, the pollutant of face is impelled to depart from face, contaminant bands is gone out film filter by the current of horizontal direction in addition, thus the speed of decelerating membrane pollution also effectively removes the pollutant of accumulation.Said apparatus carries out the method that interval spiral-wound filters, hocketed by cross-flow filtration and dead-end filtration, during cross-flow filtration, the pulse water flow that pulse water flow generator produces pours membrane module, when current flow through helical duct, produce spiral flow, to face carry out tangential and vertical on liquid flow disturbance; After pulse water flow occurs, the feed liquid in reserved storage area is utilized to carry out dead-end filtration.Cycle period comprise pulsatile once be opened to pulse next time open between time.
During hollow-fibre membrane normal filtration: the pulse water flow that impulse generator produces pours film filter with speed faster, when current flow through spiral organ, produce spiral flow, face is cleaned, contaminant bands is gone out film filter simultaneously.Whole process was not separated with the normal filtration stage, while water inlet, membrane flux was recovered.And water inlet and Membrane cleaning carry out, and there is not independent wash phase, effectively raise film treatment effeciency simultaneously.
In the present invention, water intake mode adopts pulse water-feeding, and continuous cross-flow also can be adopted under actual conditions to intake.
In device of the present invention, for obtaining periodic pulsatile effect, and consider the requirement of easy operating aspect, described impulse generator utilizes solenoid control switch to reach the effect of pulse, has simple, easy-operating feature.Start-up time can according to influent quality, fouling membrane situation, and start the cycle adjustable from 5 ~ 30 minutes, whole pulse process can control by computer automatically.The pulse water flow adopted comparatively relaxes, and prevents violent water slug to the breakage caused of hollow-fibre membrane.
The present invention produces pulse water flow with impulse generator, produces spiral flow with spiral organ, adopts interval spiral cross-flow filtration mode, utilize spiral flow and film surface pollution thing that the motion of tangential and longitudinal both direction occurs, lessening membrane fouling, compared with existing membrane treatment appts, has the following advantages:
(1) compared with existing apparatus, the filter type of interval spiral of the present invention cross-flow utilizes spiral organ to produce, and is gone out by the fouling membrane that dead end filtration stage is accumulated while water inlet.Compared to omnidistance dead-end filtration mode, the dope of membrane cisterna can intermittently be discharged by interval spiral cross-flow filtration mode of the present invention, eliminates or reduces concentration polarization phenomenon, lessening membrane fouling.Compared to cross-flow filtration, interval spiral cross-flow filtration mode of the present invention can improve cross-flow current distance, reduces the consumption of flushing water; Pulse screw cross-flow produces the tangential force of both direction at face, and has certain percussion, and effect is better than the single horizontal tangential power of cross-flow filtration.Meanwhile, apparatus of the present invention can make energy consumption greatly reduce by regulating cross-flow filtration and the dead-end filtration time shared separately, and easily are automated control.
(2) compared with existing apparatus, the filter type of interval spiral of the present invention cross-flow utilizes rotating separation technology, macromolecule contaminant under the influence of centrifugal force, easily away from membrane filtration water inlet central area, cause the solute molecule at center less, less, not easily produce fouling membrane.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of interval spiral cross-flow filtration device of the present invention.
Fig. 2 is the schematic diagram of membrane module of the present invention.
Fig. 3 is the three-dimensional enlarged diagram of helical baffle in membrane module of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is more specifically described in detail, but embodiments of the present invention are not limited thereto, for the technological parameter do not indicated especially, can refer to routine techniques and carry out.
A kind of interval spiral-wound filter, comprise membrane module 2 and water circulation system, described membrane module 2 comprises housing 18, doughnut press mold 19 and the helical baffle 20 outward of setting, and be provided with helical baffle 20 at its inwall of housing inner close fitting, helical baffle and inner walls gap are 2mm; On helical baffle, be provided with reserved storage area 21, the middle part of helical baffle 20 is provided with stay pipe 22, forms the helical duct around stay pipe 22 between helical baffle 20 and housing 18; The outer press mold 19 of described doughnut runs through helical baffle 20 to be vertically located in housing 18, and the lower end of the outer press mold 19 of doughnut is fixed on the bottom of helical baffle, and upper end is fixed by film head, and is connected with the filtrate (liquid on housing by outlet pipe 23; The upper and lower end of housing is respectively equipped with cross-flow entery and delivery port, the entrance of the corresponding helical duct of described cross-flow water inlet, its water inlet direction and inner walls tangent; The outlet of helical duct is communicated with cross-flow delivery port by reserved storage area 21; Described water circulation system comprises the tank 1 of pipeline connection successively, water circulating pump 6, water tank 5 and magnetic valve 10(water tank 5 and magnetic valve 10 forms impulse generator), magnetic valve 10 is connected with water outlet of water tank, for control impuls current origination interval, described magnetic valve 10 is exported and is communicated with cross-flow water inlet by inlet pipeline 3, and inlet pipeline 3 is provided with flow valve 9; The water inlet end of tank 1 is communicated with cross-flow delivery port by return line 4.
Helical baffle 20 is by plastics one-shot forming, and center is provided with hollow support pipe, and helical baffle inside forms specific helical flow path.In blade, punching press has some holes, running through for hollow-fibre membrane.By the adjustment helical baffle blade number of turns, adjustable hydraulic detention time and water velocity.
Be provided with mechanical agitator 8 in tank 1, for mixed pulses backwater and water inlet, the liquid in regularly being circulated by liquid storage is discharged from emptying valve 12, reduces water inlet pollutant load.Feed liquid in hollow-fibre membrane normally runs in tank 1 is periodically supplied to hollow-fibre membrane.Tank 1 is for the storage of pulse water outlet, so that feed liquid can evenly be filled with in water tank 5 by water circulating pump 6.
Filtrate (liquid place on housing is provided with Pressure gauge 7 and goes out water pump 11.
Referring to Fig. 1,2,3, interval spiral cross-flow filtration mode and device are described in detail.
Said apparatus carries out the method that interval spiral-wound filters, and is hocketed by cross-flow filtration and dead-end filtration.During cross-flow filtration, membrane module normally runs: the magnetic valve 10 of starting impulse generator, by the valve open on inlet pipeline 3, return line 4; When magnetic valve 10 is opened, the pulse water flow in water tank 5 enters membrane module 2 through inlet pipeline 3, and when current are by the helical baffle 20 in membrane module 2, flow shape changes, and becomes spiral flow from direct current.Spiral flow moves around whole helical baffle 20, and period and face occur tangential staggered, rinses face, to face carry out tangential and vertical on liquid flow disturbance, and pollutant is gone out membrane module 2, lessening membrane fouling, maintains membrane flux.Spiral flow water outlet enters tank 1 through return line 4, by water circulating pump pump 6, liquid in tank 1 is input to water tank 5, completes whole circulation.Within the interval time that pulse water flow occurs, the feed liquid in reserved storage area is utilized to carry out dead-end filtration.
In device of the present invention, in the process of pulse water-feeding, current have certain percussion, with certain cleaning performance.The fouling membrane that a upper cycle dead-end filtration accumulates effectively can be removed by device of the present invention while pulse water-feeding, thus makes the membrane flux that hollow-fibre membrane remains higher.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (5)
1. an interval spiral-wound filter, it is characterized in that, comprise membrane module and water circulation system, described membrane module comprises housing, doughnut press mold and the helical baffle outward of setting, helical baffle is provided with at its inwall of housing inner close fitting, on helical baffle, be provided with reserved storage area, the middle part of helical baffle is provided with stay pipe, forms the helical duct around stay pipe between helical baffle and housing; The outer press mold of described doughnut runs through helical baffle to be vertically located in housing, the lower end of the outer press mold of doughnut is fixed on the bottom of helical baffle, upper end is fixed by film head, and be connected with the filtrate (liquid on housing, the upper and lower end of housing is respectively equipped with cross-flow entery and delivery port, the entrance of the corresponding helical duct of described cross-flow water inlet, the outlet of helical duct is communicated with cross-flow delivery port by reserved storage area; Described water circulation system comprises the tank of pipeline connection successively, water circulating pump and pulse water flow generator, and described pulse water flow generator is by flow valve and cross-flow water inlet pipeline connection, and the water inlet end of tank is communicated with cross-flow water outlet pipeline.
2. device according to claim 1, is characterized in that, described pulse water flow generator comprises the magnetic valve of water tank and control impuls current origination interval, and described magnetic valve is connected with water outlet of water tank.
3. device according to claim 1 and 2, is characterized in that, water inlet direction and the inner walls of described cross-flow water inlet are tangent.
4. device according to claim 3, is characterized in that, described helical baffle and inner walls gap are 1 ~ 3mm.
5. utilize device described in claim 1 or 2 or 3 or 4 to carry out the method for interval spiral-wound filtration, it is characterized in that, the method is hocketed by cross-flow filtration and dead-end filtration, during cross-flow filtration, the pulse water flow that pulse water flow generator produces pours membrane module, when current flow through helical duct, produce spiral flow, to face carry out tangential and vertical on liquid flow disturbance; After pulse water flow occurs, the feed liquid in reserved storage area is utilized to carry out dead-end filtration.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310608126.2A CN103638818B (en) | 2013-11-26 | 2013-11-26 | A kind of interval spiral-wound filter and method |
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| CN201310608126.2A CN103638818B (en) | 2013-11-26 | 2013-11-26 | A kind of interval spiral-wound filter and method |
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| CN103638818A CN103638818A (en) | 2014-03-19 |
| CN103638818B true CN103638818B (en) | 2015-08-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104226116B (en) * | 2014-07-01 | 2016-06-22 | 杭州求是膜技术有限公司 | A kind of membrane contactor and manufacturing process thereof |
| CN106861441B (en) * | 2017-03-29 | 2020-02-21 | 海南立昇净水科技实业有限公司 | Method and device for cleaning water purification membrane module |
| CN115845623A (en) * | 2022-11-25 | 2023-03-28 | 韩安庆 | Organic gas permeation filtering membrane |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5775113A (en) * | 1980-10-28 | 1982-05-11 | Mitsui Petrochem Ind Ltd | Filter |
| JPH11347595A (en) * | 1998-06-11 | 1999-12-21 | Nkk Corp | Water purifying treatment equipment and concentration sludge thereof |
| WO2001089669A2 (en) * | 2000-05-19 | 2001-11-29 | Filtration Solutions, Inc. | Cross-flow filtration assembly |
| JP2002358988A (en) * | 2001-06-01 | 2002-12-13 | Honda Motor Co Ltd | Hollow fiber module |
| CN2761253Y (en) * | 2004-12-23 | 2006-03-01 | 株洲工学院科技开发部 | Variable pitch film assembly device |
| CN203635081U (en) * | 2013-11-26 | 2014-06-11 | 华南理工大学 | Intermittent spiral cross-flow membrane filtering device |
-
2013
- 2013-11-26 CN CN201310608126.2A patent/CN103638818B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5775113A (en) * | 1980-10-28 | 1982-05-11 | Mitsui Petrochem Ind Ltd | Filter |
| JPH11347595A (en) * | 1998-06-11 | 1999-12-21 | Nkk Corp | Water purifying treatment equipment and concentration sludge thereof |
| WO2001089669A2 (en) * | 2000-05-19 | 2001-11-29 | Filtration Solutions, Inc. | Cross-flow filtration assembly |
| JP2002358988A (en) * | 2001-06-01 | 2002-12-13 | Honda Motor Co Ltd | Hollow fiber module |
| CN2761253Y (en) * | 2004-12-23 | 2006-03-01 | 株洲工学院科技开发部 | Variable pitch film assembly device |
| CN203635081U (en) * | 2013-11-26 | 2014-06-11 | 华南理工大学 | Intermittent spiral cross-flow membrane filtering device |
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