CN103626259A - Immersed type membrane pool and operation method thereof - Google Patents
Immersed type membrane pool and operation method thereof Download PDFInfo
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- CN103626259A CN103626259A CN201210301444.XA CN201210301444A CN103626259A CN 103626259 A CN103626259 A CN 103626259A CN 201210301444 A CN201210301444 A CN 201210301444A CN 103626259 A CN103626259 A CN 103626259A
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Abstract
The invention discloses an immersed type membrane pool and an operation method thereof. The immersed type membrane pool is composed of an upper filtering zone of immersed type membrane components and a lower sludge staying zone; the upper filtering zone is provided with a water inlet, and an overflow port; the upper end of the membrane components is provided with a water-generating port; the low end of the membrane components is provided with an air washing port; the lower end of the sludge staying zone is provided with a sludge discharging outlet; and the filtering zone is provided with a backwashing discharging outlet. When the immersed type membrane pool is used for processing high turbidity water, membrane operation is stable, recovery rate is increased greatly, and secondary treating is reduced. Process flow of high turbidity water treatment is simple and convenient; operation is simple; and the immersed type membrane pool is suitable for solving of water source algae outbreak in summer or treatment of other emergency pollution, and is especially suitable for drinking water advanced treatment of water-deficient areas.
Description
Technical field
The invention belongs to embrane method water treatment field, be specifically related to a kind of immersed type membrane pond and operation method thereof.
Background technology
Growing along with membrane for water treatment technology, internal membrane technology has obtained significant progress in drinking water treatment field, especially in recent years, range of application was also in continuous expansion, and the embrane method water technology that the immersion ultrafiltration of take is master has obtained good operating performance in Practical Project.
Submerged hollow fibre membrane module in bioreactor immerses in the former water in unlimited submergence container, more obvious compared with pressure type assembly advantage to the pollutant removal being blocked between film surface and film silk, when raw water turbidity is higher, immersion type membrane component operation stability is more stable compared with pressure type membrane module conventionally.
Immersion type membrane component adopts following methods conventionally for higher turbidity water at present: in filtration procedure and physical cleaning process, continue to carry out air aeration; Or regularly discharge the former water in submergence pond after most of physical cleaning; Or the method in conjunction with both methods.Lasting air aeration is mainly widely used in sewage disposal, but running cost is higher, and working method deficient in stability.And regularly discharge after physical cleaning after the most of water of membrane cisterna, membrane cisterna is again intake to move and is made the interior concentration of membrane cisterna lower, this working method is for the treatment of the steady running of ultra's film energy, but because the water major part in membrane cisterna is discharged, thereby the problem that exists the operation rate of recovery greatly to reduce.Meanwhile, due to the water discharge that in membrane cisterna, most of concentration is higher, higher muddy water ratio causes serious secondary pollution, if directly enter the water bodys such as river course, may cause mud to stop up riverbed, and cause water pollution problem.
Summary of the invention
The present invention is directed to the defect in above-mentioned immersion type membrane component operational process, adopting continues to intake makes membrane cisterna internal contamination concentration remain on lower level, makes operation stable, and is refluxed and greatly improved the rate of recovery by overflow and backwash water.By natural subsidence, make mud-water separation simultaneously, greatly reduce secondary pollution.
The invention provides a kind of immersed type membrane pond, its filtrating area by upper submerged formula membrane module and mud stacking area, bottom form, filtrating area is provided with water-in and overflow port, membrane module upper end is provided with produces the mouth of a river, membrane module lower end is provided with air scour mouth, lower end, mud stacking area is provided with mud discharging mouth, and filtrating area is also provided with backwash discharge outlet.
Backwash discharge outlet is preferably placed at 1/2 above position of the vertical direction of membrane module.During due to back flushing, assembly 1/2 place's film silk possibility jitter amplitude is large, pollutent easily comes off, and along with bubble rising suspended contaminant also rises, top suspended solid pollutant concentration is higher, backwash discharge outlet is located at 1/2 above position and is conducive to pollutent backflow, is conducive to film steady running.Further be preferably placed at 2/3 above position of the vertical direction of membrane module.
More than water-in is preferably placed at the membrane module product mouth of a river.The sustainable water inlet of water-in, water inlet can adopt the modes such as siphon or pump suction.
In the present invention, preferably between filtrating area and mud stacking area, be provided with prionodont dividing plate.When dividing plate being set can preventing backwash, water impact causes that mud stacking area mud rises, and improves filtrating area suspended pollution substrate concentration, affects film steady running.Prionodont dividing plate is positioned at Air Reverse and rinses a mouthful below, for reducing stacking area mud to film steady running impact, apart from air backwash mouth, is more than or equal to 200mm.If be less than 200mm, during backwash may there is disturbance in submergence pool inner water, easily causes and be deposited in baffle surface suspended substance Eddy diffusion, and unfavorable mud is assembled, and affects film operation stability.
The present invention also provides a kind of immersed type membrane pond operation method to be: pending water enters filtrating area through water-in, film produces water and produces mouth of a river outflow through membrane module, filter after 10 ~ 120min, film produces water and carries out backwash 1.0 ~ 3.0min through the membrane module product mouth of a river, open air scour mouth and backwash discharge outlet simultaneously, part backwash solution flows back to raw water box through backwash discharge outlet, and the complete system restart of backwash is filtered.
In the present invention, stacking area mud is discharged by mud discharging mouth.
The present invention is not particularly limited for the material of film, but in order to guarantee the stability of immersion ultrafiltration system, in the present invention, submerged ultrafiltration preferably adopts polyvinylidene difluoride (PVDF) material, and aperture is 0.1 ~ 0.01 μ m.
Principal feature of the present invention is:
Backwash water is back to raw water box through backwash discharge outlet and improves the rate of recovery of processing water, greatly reduces secondary pollution simultaneously.And process for ultra, can select to continue water inlet and overflow, guarantee in film treating processes stable.Make ultra's processing technological flow easy, simple to operate, be applicable to tackle waterhead area alga eruption in summer or other urgent pollution processing, be especially applicable to water-deficient area drinking water deep and process.
Accompanying drawing explanation
Fig. 1 is immersed type membrane pond schematic diagram.
Wherein 1 is immersed type membrane pond; 2 is water-in; 3 is overflow port; 4 is the film product mouth of a river; 5 is backwash water port; 6 is membrane module; 7 is air scour mouth; 8 is dividing plate; 9 is mud discharging mouth.
Fig. 2 is the schematic cross sectional view along the section of the A-A direction intercepting shown in Fig. 1.
Embodiment
Testing method:
Turbidity: HACH 2100N turbidimeter.
Embodiment 1:
Certain former water adds after a certain amount of powder carbon or coagulating agent, and pending water turbidity is 45 ~ 100NTU.Concrete treatment scheme is as follows: through water-in, continue to enter in membrane cisterna, controlling water kick flooding quantity ratio is 10%, membrane module is PVDF submerged hollow fiber ultra-filtration membrane, membrane pore size 0.01um, membrane module film silk periphery is surrounded by netted PVC plate, membrane module filtration flux is 1.7m/d, after filter 23 0min, carry out backwash and air scour 1min, the backwash water yield is 1.5 times of filtration flux, during backwash, film pool inner water is back to raw water box through backwash water port, backwash discharge outlet is positioned at membrane module vertical height 2/3 place, the circular flow of backwash completion system.Between filtrating area and mud stacking area, be provided with prionodont dividing plate, film initial operating stage pressure reduction is 30 ~ 45kPa, after continuous service 30 days, film operation pressure differential maintain is 35 ~ 55kPa, film delivery turbidity is lower than 0.1NTU, and submerged ultrafiltration assembly operating is stable, matting cycle period of greater than two months, move 7 ~ 10 days afterwards by mud discharging mouth spoil disposal once, system is processed the rate of recovery and is reached more than 99.6%.
Embodiment 2:
Pending water same as described above, after water-in enters membrane cisterna, Membrane Filtration Flux and filtration time and backwash flux and backwash time are identical with embodiment 1, backwash water port is positioned at 1/2 place of membrane module vertical direction, during backwash, in membrane cisterna, solution is back to raw water box through backwash pipeline, the circular flow of backwash completion system.Between filtrating area and mud stacking area, be provided with prionodont dividing plate, film initial operating stage pressure reduction is 30 ~ 45kPa, and continuous service is after 30 days, and film operation pressure differential range is 35 ~ 55kPa, and the matting cycle can reach 2 months.System recoveries rate maintains more than 99.6%.
Embodiment 3:
Pending water same as described above, after water-in enters membrane cisterna, Membrane Filtration Flux and filtration time and backwash flux and backwash time are identical with embodiment 1, backwash water port is positioned at 1/3 place of membrane module vertical direction, during backwash, in membrane cisterna, solution is back to raw water box through backwash pipeline, the circular flow of backwash completion system.Between filtrating area and mud stacking area, be provided with prionodont dividing plate, film initial operating stage pressure reduction is 30 ~ 45kPa, and continuous service is after 30 days, film operation pressure differential range is 40 ~ 60kPa, operation pressure reduction is slightly high compared with embodiment 1, and film pollutes to some extent to be increased, and system operation reaches the requirement of membrance chemistry cleaning interval.System recoveries rate maintains more than 99.6%.
Embodiment 4:
Processing water same as described above, after water-in enters membrane cisterna, Membrane Filtration Flux and filtration time and backwash flux and backwash time are identical with embodiment 1, backwash water port is positioned at 2/3 place of membrane module vertical direction, during backwash, in membrane cisterna, solution is back to raw water box through backwash mouth, the circular flow of backwash completion system.Between filtrating area and mud stacking area, without dividing plate, film initial operating stage pressure reduction is 30 ~ 45kPa, and continuous service is after 30 days, film operation pressure differential range is 45 ~ 65kPa, operation pressure reduction is slightly high compared with embodiment 1, and film pollutes to some extent to be increased, but system operation reaches the requirement of membrance chemistry cleaning interval.System recoveries rate reaches more than 99.6%.
Comparative example 1:
For above-mentioned pending water, adopt Membrane Filtration Flux and the backwash filtration time identical with embodiment to move, backwash flux is filtration flux 1.5 times, backwash solution directly discharges from membrane cisterna bottom discharge mouth, immersed type membrane pond is without mud stacking area, racks up after membrane cisterna water water inlet again and filters.Film initial operating stage pressure reduction is 30 ~ 45kPa, moves after 30 days, and film operation pressure reduction is 33 ~ 52kPa.It is 93.2% that system is processed the rate of recovery.
Claims (7)
1. an immersed type membrane pond, its filtrating area by upper submerged formula membrane module and mud stacking area, bottom form, filtrating area is provided with water-in and overflow port, membrane module upper end is provided with produces the mouth of a river, membrane module lower end is provided with air scour mouth, lower end, mud stacking area is provided with mud discharging mouth, it is characterized in that: filtrating area is also provided with backwash discharge outlet.
2. a kind of immersed type membrane pond according to claim 1, is characterized in that: described backwash discharge outlet is positioned at 1/2 above position of the vertical direction of membrane module.
3. a kind of immersed type membrane pond according to claim 1, is characterized in that: more than described water-in is positioned at the membrane module product mouth of a river.
4. a kind of immersed type membrane pond according to claim 1, is characterized in that: between described filtrating area and mud stacking area, be provided with prionodont dividing plate.
5. a kind of immersed type membrane pond according to claim 4, is characterized in that: described prionodont dividing plate is positioned at air scour mouth below, apart from air scour mouth, is more than or equal to 200mm.
6. a right to use requires the operation method of the immersed type membrane pond described in 1, it is characterized in that: pending water enters filtrating area through water-in, film produces water and produces mouth of a river outflow through membrane module, filter after 10 ~ 120min, film produces water and carries out backwash 1.0 ~ 3.0min through the membrane module product mouth of a river, open air scour mouth and backwash discharge outlet, part backwash solution flows back to raw water box through backwash discharge outlet simultaneously, and the complete system restart of backwash is filtered.
7. the operation method of immersed type membrane pond according to claim 6, is characterized in that: stacking area mud is discharged by mud discharging mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210301444.XA CN103626259A (en) | 2012-08-22 | 2012-08-22 | Immersed type membrane pool and operation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210301444.XA CN103626259A (en) | 2012-08-22 | 2012-08-22 | Immersed type membrane pool and operation method thereof |
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| CN103626259A true CN103626259A (en) | 2014-03-12 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030466A (en) * | 2014-04-30 | 2014-09-10 | 河海大学 | Novel immersion ultrafilter apparatus |
| CN104310627A (en) * | 2014-11-18 | 2015-01-28 | 郭旦威 | Portable anti-clogging unpowered waterer |
| CN107158949A (en) * | 2017-07-10 | 2017-09-15 | 北京赛诺膜技术有限公司 | A kind of ultrafiltration water purification treatment technology of high-recovery |
| CN111482089A (en) * | 2020-06-03 | 2020-08-04 | 北京唯沃特水务科技有限公司 | High-density fiber module group and high-density fiber HDF module |
| CN112473377A (en) * | 2020-12-18 | 2021-03-12 | 青岛润扬环境科技有限公司 | Tubular micro-filtration circulating water tank |
| CN115124216A (en) * | 2022-08-12 | 2022-09-30 | 北控水务(中国)投资有限公司 | Sludge concentration device and sewage treatment system |
| CN115124216B (en) * | 2022-08-12 | 2024-11-12 | 北控水务(中国)投资有限公司 | Sludge concentration device and sewage treatment system |
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| JP2009101349A (en) * | 2007-10-05 | 2009-05-14 | Toray Ind Inc | Cleaning method of immersion type membrane module |
| CN201125177Y (en) * | 2007-11-16 | 2008-10-01 | 王俊川 | Membrane separation sedimentation system integrated apparatus for recycling reclaimed water |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030466A (en) * | 2014-04-30 | 2014-09-10 | 河海大学 | Novel immersion ultrafilter apparatus |
| CN104030466B (en) * | 2014-04-30 | 2016-02-10 | 河海大学 | A kind of immersion ultra-filtration filters device |
| CN104310627A (en) * | 2014-11-18 | 2015-01-28 | 郭旦威 | Portable anti-clogging unpowered waterer |
| CN107158949A (en) * | 2017-07-10 | 2017-09-15 | 北京赛诺膜技术有限公司 | A kind of ultrafiltration water purification treatment technology of high-recovery |
| CN111482089A (en) * | 2020-06-03 | 2020-08-04 | 北京唯沃特水务科技有限公司 | High-density fiber module group and high-density fiber HDF module |
| CN112473377A (en) * | 2020-12-18 | 2021-03-12 | 青岛润扬环境科技有限公司 | Tubular micro-filtration circulating water tank |
| CN115124216A (en) * | 2022-08-12 | 2022-09-30 | 北控水务(中国)投资有限公司 | Sludge concentration device and sewage treatment system |
| CN115124216B (en) * | 2022-08-12 | 2024-11-12 | 北控水务(中国)投资有限公司 | Sludge concentration device and sewage treatment system |
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