CN104445521A - Method and device for retarding membrane pollution in membrane water treatment - Google Patents
Method and device for retarding membrane pollution in membrane water treatment Download PDFInfo
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- CN104445521A CN104445521A CN201410614805.5A CN201410614805A CN104445521A CN 104445521 A CN104445521 A CN 104445521A CN 201410614805 A CN201410614805 A CN 201410614805A CN 104445521 A CN104445521 A CN 104445521A
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Abstract
The invention relates to a method and a device for retarding membrane pollution in membrane water treatment. A shell with a membrane component is filled with a certain quantity of active carbon particles with certain particle size. In order to ensure the effect, the shell needs to be vertically installed; the volume of the active carbon particles accounts for about 30%-60% of that of a gap of the shell; the active carbon particles are fluidized in the shell of the membrane component through power of a circulating pump; the membrane surface is scrubbed continuously, so that pollutants are prevented from forming a filter cake layer on the membrane surface; the resistance of a filter cake layer of the membrane is retarded; dissolved organic matters in water are partially adsorbed by virtue of the adsorption capacity of the active carbon particles; blockage for membrane pores is retarded; and the blocking resistance of the membrane pores is retarded. The device comprises a filter shell and the membrane component; the shell is filled with a certain quantity of active carbon particles; a circulating pump is arranged on the shell and used for providing power for fluidization of the active carbon particles, so that the membrane surface is effectively scrubbed, the filter cycle of the membrane is prolonged and the operation cost is lowered further.
Description
Technical field
The present invention relates to water treatment field, especially relate to a kind of method and the device that slow down fouling membrane in water treatment by membrane.
Background technology
Membrane technique started to be applied to water treatment field in the sixties in 20th century, so far one of technology having development potentiality most has but been become in water treatment field, become to solve in tap water and occur disinfection byproduct (DBP) (Disinfection byproducts, DBP) effective means (Membranebioreactor, MBR) of reusing sewage, is realized.Particularly low voltage operated microfiltration membrane (Microfiltration, MF) and ultra-filtration membrane (Ultrafiltration, UF) are the main product of membrane technique in water treatment applications in recent years.MF and UF has advantage in the Integrated comparative of economy, operability and treatment effect, is most widely used.
Although the advantage that membrane separation technique has other water technologies numerous incomparable, fouling membrane is then the key issue hindering application of membrane universal.Fouling membrane can cause flux to decline or mould difference rises, and causes working cost and water producing cost to increase.If properly effectively solve membrane pollution problem, then can extend filtration cycle and the membrane lifetime of film process, reduce backwash water amount and dosing, reduce energy consumption, thus reduce the operation and maintenance cost of membrane treatment process, improve processing efficiency and the processing power of system.
Summary of the invention
The technical problem to be solved in the present invention is: overcome deficiency of the prior art, provides a kind of method and the device that slow down fouling membrane in water treatment by membrane, reduces the filtration resistance of film, extends filtration cycle and the membrane lifetime of film process, reduces energy consumption, reduce running cost.
The technical solution adopted for the present invention to solve the technical problems is: a kind of method that in water treatment by membrane, fouling membrane slows down, the granulated active carbon of certain particle diameter and quantity is inserted in the housing being provided with membrane module, membrane module is vertically arranged in housing, and the cumulative volume of granulated active carbon accounts for 30% ~ 60% of housing internal pore volume; Power is provided to make granulated active carbon fluidisation in housing by recycle pump; continue to put on the skin film surface to wash; avoid pollutent and form filter cake layer on film surface; slow down the filter cake layer resistance of film; and rely on the adsorptive power of granulated active carbon; part dissolved organic matter in planar water, slow down Pore Blocking, slow down Pore Blocking resistance.
Further, housing is uprightly installed, and the fluidisation power of described granulated active carbon is provided by recycle pump.
Further, the film of described housing inner membrane member is flat sheet membrane or hollow-fibre membrane.
Further, in water treatment procedure, membrane module adopts cross flow filter or dead-end filtration.
A kind of membrane-way water treating device, comprise filtrate housing and membrane module, described membrane module is vertically arranged in filtrate housing, in described filtrate housing, be filled with some granulated active carbons, and the cumulative volume of described granulated active carbon accounts for 30% ~ 60% of filtrate housing volume;
Described filtrate housing is provided with the first pipeline, the feed-water end of described first pipeline and rising pipe all with the inner space of filtrate housing, the pipeline of the first described pipeline is provided with recycle pump.
Further, the film in described membrane module is flat sheet membrane or hollow-fibre membrane.
Further, the water side of described first pipeline is connected at the bottom of the case of strumbox.
Further, also comprise former water inlet chest and produce water tank, the water outlet of described former water inlet chest forms pipeline connection through the water-in of second pipe and filtrate housing, the water outlet of filtrate housing forms pipeline connection through the water-in of the 3rd pipeline and former water inlet chest, the pipeline of described second pipe is provided with into water peristaltic pump;
The water outlet of described membrane module forms pipeline connection through the 4th pipeline and the water-in producing water tank, and the pipeline of the 4th described pipeline is provided with vacuum pump.
The invention has the beneficial effects as follows: the method that in a kind of water treatment by membrane of the present invention, fouling membrane alleviates, adopt granulated active carbon fluidized bed process to put on the skin and wash film surface, alleviate filtration cake layer and pollute the cake layer resistance caused; Simultaneously grain active carbon itself has certain adsorption, can dissolved organic matter in planar water, alleviates Pore Blocking and pollutes the Pore Blocking resistance caused.
Membrane-way water treating device of the present invention, the advanced treatment of (biological activated sludge method or biomembrance process) after being mainly used in tap water (after coagulating sedimentation) or sewage second-level process.In the process utilizing the particle charcoal of fluidisation to clean film surface, filtering without the need to stopping, greatly alleviating filter cake layer resistance and the Pore Blocking resistance of film, extend the filtration cycle of film, reduce running cost, improve processing efficiency and the processing power of system.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation of membrane-way water treating device;
Fig. 2 is the variation diagram (list in figure, 20min is 1 cycle of operation, and 5min stops recycle pump 15min ON cycle pump and makes particle charcoal fluidisation) of mould difference (TMP) before and after intermittently starting recycle pump granulated active carbon fluidisation;
In figure, 1, filtrate housing, 2, former water inlet chest, 3, produce water tank, 4, membrane module, 5, second pipe, 51, water inlet peristaltic pump, the 6, the 3rd pipeline, the 7, the 4th pipeline, 71, vacuum pump, the 8, first pipeline, 81, recycle pump, 9, granulated active carbon.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.
A kind of method slowing down fouling membrane in water treatment by membrane, granulated active carbon (the Granular activated carbon of certain particle diameter, some amount is inserted in the housing being provided with membrane module, GAC), membrane module is vertically arranged in housing, the cumulative volume of granulated active carbon accounts for 30% ~ 60% of housing internal pore volume, and the volume of this housing is the volume of housing when deducting membrane module; Power is provided to make granulated active carbon fluidisation in housing by recycle pump; continue to put on the skin film surface to wash; avoid pollutent and form filter cake layer on film surface; slow down the filter cake layer resistance of film; and rely on the adsorptive power of granulated active carbon; part dissolved organic matter in absorption tap water, slow down Pore Blocking, slow down Pore Blocking resistance.
Film in membrane module is flat sheet membrane or hollow-fibre membrane, and the film of the membrane module run in Fig. 2 adopts hollow-fibre membrane, and quantity is 6 (polyvinylidene difluoride (PVDF), PVDF), every root length 0.2m, internal diameter is 0.9mm, external diameter is 1.9mm, and film mean pore size is 0.1 μm.
Membrane module can adopt cross flow filter or dead-end filtration; in water treatment procedure; former hydromining is with artificial distribution; cross flow filter is selected to be example; the size of granulated active carbon is about every 1mm ~ 3mm; gac 8g (nut-shell goods), the packing height of granulated active carbon before not being fluidized is 50% of whole cavity heights.ON cycle pump, thus make the fluid height of granulated active carbon in casing can reach more than 90% of whole membrane module virtual height.The fluidisation of granulated active carbon, constantly can put the surface and fenestra of washing film on the skin, alleviates the filter cake layer being collected at film surface, and simultaneously granulated active carbon can also ceaselessly deliquescent organism in planar water, reduces and pollutes Pore Blocking.
As shown in Figure 1, a kind of water treatment device, the advanced treatment of (biological activated sludge method or biomembrance process) after device is mainly used in tap water (after coagulating sedimentation) or sewage second-level process; Comprise filtrate housing 1 and membrane module 4; membrane module 4 is vertically arranged in filtrate housing 1; in filtrate housing 1, be filled with the granulated active carbon 9 of certain particle diameter, some amount, the cumulative volume of granulated active carbon 9 accounts for 30% ~ 60% of strumbox 1 volume, and preferably 50%.Filtrate housing 1 is provided with the feed-water end of the first pipeline 8, first pipeline 8 and rising pipe all with the inner space of strumbox 1, the pipeline of the first pipeline 8 is provided with recycle pump 81.The water side of the first pipeline 8 is connected at the bottom of the case of filtrate housing 1, and the flow dynamic that such recycle pump 81 provides can all act on the granulated active carbon 9 that is collected at bottom filtrate housing 1, better drives granulated active carbon 9 to flow.
Water treatment device also comprises former water inlet chest 2 and produces water tank 3, the water outlet of former water inlet chest 2 forms pipeline connection through second pipe 5 and the water-in of filtrate housing 1, the water outlet of filtrate housing 1 forms pipeline connection through the 3rd pipeline 6 with the water-in of former water inlet chest 2, can cross flow filter be formed, the pipeline of second pipe 5 is provided with into water peristaltic pump 51.Water inlet peristaltic pump 51 drives the former water in inlet chest to squeeze in filtrate housing 1 to filter, and vacuum pump 71 produces in water tank 3 for being squeezed into by the water after filtering through membrane module 4.Also can cancel this pump when adopting cross flow filter, providing film to go out water power by the pressure difference in housing.
The water outlet of membrane module 4 forms pipeline connection through the 4th pipeline 7 with the water-in producing water tank 3, and the pipeline of the 4th pipeline 7 is provided with vacuum pump 71.
Film in membrane module 4 can be selected as flat sheet membrane or hollow-fibre membrane.
Adopt membrane-way water treating device of the present invention; in time needing to clean the filter cake layer on membrane module 4 or other pollutents blocking fenestras; can directly start recycle pump 81; recycle pump 81 provides power to drive granulated active carbon 9 to flow in filtrate housing 1; flowing granulated active carbon 9 constantly put on the skin wash film surface filter cake layer and fenestra in pollutent; the organism dissolved in planar water while of granulated active carbon 9, reduces Pore Blocking and pollutes.
Membrane-way water treating device of the present invention, in the process that film is cleaned, the water inlet peristaltic pump 51 of water treatment device and vacuum pump 71 is not needed to close, when stopper film does not filter, film is effectively cleaned, alleviate filter cake layer resistance and the Pore Blocking resistance of film, extend the filtration cycle of film, reduce running cost.
As shown in Figure 2; fluidisation for comparative particle's gac alleviates the effect that fouling membrane reduces mould difference; intermittently starting recycle pump 81, such as, 20min is 1 cycle of operation; 5min stops 15min fluidisation; can find out, adopt granulated active carbon 9 fluidization process can greatly reduce mould and differ from 40 ~ 50%, pass through water-quality test simultaneously; effluent quality index is as TOC, UV
254deng the reduction also had in various degree.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on specification sheets, must determine its technical scope according to right.
Claims (8)
1. one kind is slowed down the method for fouling membrane in water treatment by membrane, it is characterized in that, in the housing being provided with membrane module, insert the granulated active carbon of certain particle diameter and quantity, membrane module is vertically arranged in housing, and the cumulative volume of granulated active carbon accounts for 30% ~ 60% of housing internal pore volume; Power is provided to make granulated active carbon fluidisation in housing by recycle pump; continue to put on the skin film surface to wash; avoid pollutent and form filter cake layer on film surface; slow down the filter cake layer resistance of film; and rely on the adsorptive power of granulated active carbon; part dissolved organic matter in planar water, slow down Pore Blocking, slow down Pore Blocking resistance.
2. a kind of method slowing down fouling membrane in water treatment by membrane according to claim 1, it is characterized in that, housing is uprightly installed, and the fluidisation power of described granulated active carbon is provided by recycle pump.
3. a kind of method slowing down fouling membrane in water treatment by membrane according to claim 1, is characterized in that, the film of described housing inner membrane member is flat sheet membrane or hollow-fibre membrane.
4. a kind of method slowing down fouling membrane in water treatment by membrane according to claim 1, is characterized in that, in water treatment procedure, membrane module adopts cross flow filter or dead-end filtration.
5. a membrane-way water treating device, it is characterized in that, comprise filtrate housing (1) and membrane module (4), described membrane module (4) is vertically arranged in filtrate housing (1), in described filtrate housing (1), be filled with some granulated active carbons (9), the cumulative volume of described granulated active carbon (9) accounts for 30% ~ 60% of filtrate housing (1) volume;
Described filtrate housing (1) is provided with the first pipeline (8), the feed-water end of described first pipeline (8) and rising pipe all with the inner space of filtrate housing (1), the pipeline of described the first pipeline (8) is provided with recycle pump (81).
6. a kind of membrane-way water treating device according to claim 5, is characterized in that, the film in described membrane module (4) is flat sheet membrane or hollow-fibre membrane.
7. a kind of membrane-way water treating device according to claim 5, is characterized in that, the water side of described first pipeline (8) is connected at the bottom of the case of strumbox (1).
8. a kind of membrane-way water treating device according to claim 5, it is characterized in that, also comprise former water inlet chest (2) and produce water tank (3), the water outlet of described former water inlet chest (2) forms pipeline connection through second pipe (5) and the water-in of filtrate housing (1), the water outlet of filtrate housing (1) forms pipeline connection through the 3rd pipeline (6) and the water-in of former water inlet chest (2), the pipeline of described second pipe (5) is provided with into water peristaltic pump (51);
The water outlet of described membrane module (4) forms pipeline connection through the 4th pipeline (7) and the water-in producing water tank (3), and the pipeline of the 4th described pipeline (7) is provided with vacuum pump (71).
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| CN201410614805.5A CN104445521A (en) | 2014-11-04 | 2014-11-04 | Method and device for retarding membrane pollution in membrane water treatment |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104944570A (en) * | 2015-06-16 | 2015-09-30 | 广州大学 | Preparation method and application of sludge-based activated charcoal |
| CN105126626A (en) * | 2015-09-16 | 2015-12-09 | 湖州恒鑫过滤科技有限公司 | Membrane component containing filler |
| CN106139909A (en) * | 2016-08-24 | 2016-11-23 | 杭州汉膜新材料科技有限公司 | A kind of water purifier membrane module and method for packing thereof |
| CN106166447A (en) * | 2016-08-19 | 2016-11-30 | 泸州市南方过滤设备有限公司 | A kind of cross-current type energy-saving liquid datatron |
| CN106807248A (en) * | 2017-03-23 | 2017-06-09 | 长江大学 | A kind of antipollution hollow-fibre membrane and its manufacture method |
| CN107324460A (en) * | 2017-08-15 | 2017-11-07 | 河海大学 | It is a kind of to reduce the device and its application method of membrane capacitance deionizer fouling membrane |
| CN108455788A (en) * | 2018-02-08 | 2018-08-28 | 苏州膜海分离技术有限公司 | A kind of technique of biological powder activated carbon-ultra-filtration and separation for micro-polluted drinking water |
| CN109293085A (en) * | 2018-10-17 | 2019-02-01 | 倍杰特集团股份有限公司 | A kind of water treatment system based on EDM device |
| CN110384971A (en) * | 2018-04-18 | 2019-10-29 | 北京奥博水处理有限责任公司 | Self-cleaning filter |
| CN110407298A (en) * | 2019-07-22 | 2019-11-05 | 济南上华科技有限公司 | It is a kind of for the pretreated tubular type film processing system of refuse leachate and the pretreating process of the system |
| CN112387118A (en) * | 2019-08-19 | 2021-02-23 | 北京奥博水处理有限责任公司 | Online self-cleaning ceramic membrane filter |
| CN114524487A (en) * | 2022-03-25 | 2022-05-24 | 北京理工大学 | Novel water treatment system and process |
| CN116693045A (en) * | 2023-06-21 | 2023-09-05 | 南方海洋科学与工程广东省实验室(广州) | Multifunctional granular material, preparation method thereof and application of multifunctional granular material in reducing membrane pollution |
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| CN102639448A (en) * | 2010-03-08 | 2012-08-15 | 仁何大学校产学协力团 | Fluidized membrane bioreactor |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104944570A (en) * | 2015-06-16 | 2015-09-30 | 广州大学 | Preparation method and application of sludge-based activated charcoal |
| CN105126626A (en) * | 2015-09-16 | 2015-12-09 | 湖州恒鑫过滤科技有限公司 | Membrane component containing filler |
| CN106166447A (en) * | 2016-08-19 | 2016-11-30 | 泸州市南方过滤设备有限公司 | A kind of cross-current type energy-saving liquid datatron |
| CN106166447B (en) * | 2016-08-19 | 2018-11-02 | 泸州市南方过滤设备有限公司 | A kind of cross-current type energy-saving liquid processor |
| CN106139909A (en) * | 2016-08-24 | 2016-11-23 | 杭州汉膜新材料科技有限公司 | A kind of water purifier membrane module and method for packing thereof |
| CN106807248A (en) * | 2017-03-23 | 2017-06-09 | 长江大学 | A kind of antipollution hollow-fibre membrane and its manufacture method |
| CN107324460A (en) * | 2017-08-15 | 2017-11-07 | 河海大学 | It is a kind of to reduce the device and its application method of membrane capacitance deionizer fouling membrane |
| CN108455788A (en) * | 2018-02-08 | 2018-08-28 | 苏州膜海分离技术有限公司 | A kind of technique of biological powder activated carbon-ultra-filtration and separation for micro-polluted drinking water |
| CN110384971A (en) * | 2018-04-18 | 2019-10-29 | 北京奥博水处理有限责任公司 | Self-cleaning filter |
| CN109293085A (en) * | 2018-10-17 | 2019-02-01 | 倍杰特集团股份有限公司 | A kind of water treatment system based on EDM device |
| CN109293085B (en) * | 2018-10-17 | 2021-08-24 | 倍杰特集团股份有限公司 | Water treatment system based on EDM device |
| CN110407298A (en) * | 2019-07-22 | 2019-11-05 | 济南上华科技有限公司 | It is a kind of for the pretreated tubular type film processing system of refuse leachate and the pretreating process of the system |
| CN112387118A (en) * | 2019-08-19 | 2021-02-23 | 北京奥博水处理有限责任公司 | Online self-cleaning ceramic membrane filter |
| CN114524487A (en) * | 2022-03-25 | 2022-05-24 | 北京理工大学 | Novel water treatment system and process |
| CN114524487B (en) * | 2022-03-25 | 2023-09-12 | 北京理工大学 | Water treatment system and process |
| CN116693045A (en) * | 2023-06-21 | 2023-09-05 | 南方海洋科学与工程广东省实验室(广州) | Multifunctional granular material, preparation method thereof and application of multifunctional granular material in reducing membrane pollution |
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Application publication date: 20150325 |