CN102764535B - Integrated coagulation and direct-filtration filter cloth reactor for urban sewage recycling pretreatment - Google Patents
Integrated coagulation and direct-filtration filter cloth reactor for urban sewage recycling pretreatment Download PDFInfo
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- CN102764535B CN102764535B CN201210239857.XA CN201210239857A CN102764535B CN 102764535 B CN102764535 B CN 102764535B CN 201210239857 A CN201210239857 A CN 201210239857A CN 102764535 B CN102764535 B CN 102764535B
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- 239000004744 fabric Substances 0.000 title claims abstract description 76
- 239000010865 sewage Substances 0.000 title claims abstract description 38
- 238000005345 coagulation Methods 0.000 title claims abstract description 26
- 230000015271 coagulation Effects 0.000 title claims abstract description 26
- 238000001914 filtration Methods 0.000 title claims abstract description 9
- 238000004064 recycling Methods 0.000 title abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 87
- 238000004140 cleaning Methods 0.000 claims abstract description 51
- 239000012528 membrane Substances 0.000 claims abstract description 22
- 239000000835 fiber Substances 0.000 claims abstract description 14
- 238000011010 flushing procedure Methods 0.000 claims abstract description 13
- 210000002356 Skeleton Anatomy 0.000 claims description 20
- 230000001112 coagulant Effects 0.000 claims description 17
- 210000000214 Mouth Anatomy 0.000 claims description 13
- 239000012141 concentrate Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 6
- 238000011109 contamination Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 230000001808 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 230000001360 synchronised Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 24
- 238000005516 engineering process Methods 0.000 abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052799 carbon Inorganic materials 0.000 abstract description 9
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000011068 load Methods 0.000 abstract description 2
- 238000010992 reflux Methods 0.000 abstract 1
- 239000010802 sludge Substances 0.000 description 7
- 238000005273 aeration Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009285 membrane fouling Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 210000003128 Head Anatomy 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920004933 Terylene® Polymers 0.000 description 1
- 235000012970 cakes Nutrition 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002427 irreversible Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 230000002441 reversible Effects 0.000 description 1
- 230000000630 rising Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001340 slower Effects 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 239000003403 water pollutant Substances 0.000 description 1
Abstract
The invention relates to an integrated coagulation and direct-filtration filter cloth reactor for urban sewage recycling pretreatment, and belongs to the technical field of water treatment equipment. The reactor mainly comprises a box-type tank body, a water inlet coagulation chamber, a concentrated mud bucket, and a rotatable filter cloth assembly and self-cleaning equipment which are arranged in the box-type tank body; the rotatable filter cloth assembly consists of fiber filter cloth, a turntable framework, a hollow water outlet shaft and a transmission motor; and the self-cleaning equipment consists of a self-cleaning cloth water nozzle, a self-cleaning reflux pipe and a flushing pump. According to the reactor, urban sewage is directly separated through a dynamic filter cloth membrane technology, organic carbon sources in the sewage are effectively concentrated, and energy is recovered by using an anaerobic technology; by combining a coagulation technology, membrane pollution rate is retarded, and energy consumption is reduced; and pretreatment is provided for a subsequent process, so that the treatment load of the subsequent process is lightened.
Description
Technical field
The invention belongs to water treatment facilities technical field, particularly a kind of for the pretreated integrated coagulation of municipal sewage as a resource filter cloth reactor directly.
Background technology
In recent years, the rapid growth of China's economic level and the size of population significantly increases municipal sewage output.The municipal sewage activated sludge method processing technique of current main flow, comprise the main units such as setting pot, preliminary sedimentation tank, aeration tank and second pond, main body utilizes aerobic activated sludge in aeration tank by the organic pollution decomposition and inversion in municipal sewage, although can obtain good effluent quality, also have that energy consumption is high, structures take up an area large, CO
2the defect that discharge capacity is large, cannot meet the requirement of sustainable development idea in Global climate change aggravation and resource exhaustion day by day serious today gradually.
In general, sewage can be regarded a kind of resource as, and except basic water quality requirement, sewage treatment process also needs to realize the object that in energy-saving and emission-reduction and water, energy resources reclaim.Anaerobic technology changes into methane by the organic pollutants that mainly contains in municipal sewage, and output cleans secondary energy sources, is a kind of extremely promising sewage disposal technology.But municipal sewage organic contamination substrate concentration is low, be unfavorable for the performance of anaerobic technology advantage.
There is scholar to propose, utilize microfiltration membranes or ultrafiltration membrane technique first municipal sewage to be carried out to organic carbon source separation concentrated, recycling anaerobic technology reclaims the energy in concentrate, after utilizing reverse osmosis membrane to pretreatment, sewage carries out advanced treating simultaneously, can effectively make up the defect that traditional biochemical treatment energy consumption is high, carbon emission amount large, structures floor space is large, be beneficial to by anaerobic technology and fully excavate the energy potential in sewage and resource, contributing to the realization of sustainable theory, is a kind of extremely promising sewage disposal thinking.But in application of membrane process, film pollution can cause the violent decline of membrane flux or transmembrane pressure fast rise, causes even film replacing of operation energy consumption rising, cleaning frequency membrane increase, and the economy problems of bringing with this has restricted the extensive use of membrane technology.
Utilize cheap large aperture filter medium to have the advantages that as the Dynamic membrane of membrane matrix cost is low, membrane fouling rate is slow, when guaranteeing separating effect, can extend the cycle of operation, reduce film regeneration or replacement frequency, effectively reduce operating cost.Filter medium mainly contains metal fabric, filter cloth and multiple synthetic material.The rotating disk filter plant that the filter cloth of take is filter medium with its compact conformation, the advantage such as floor space is little, the backwash water yield is few, disposal cost province is successfully applied to the middle water reuse field after municipal sewage two stage treatment abroad.Domestic also have a patent case of utilizing filter cloth to generate bio-dynamic membrane in activated sludge process.Therefore filter cloth Dynamic Membrane reactor is expected to become a kind of separated preconditioning technique of the sewage low, efficiency is high with easy and simple to handle of investing.
Coagulation and Adsorption process can be reunited and mainly be caused colloid and the small-molecule substance that film pollutes, and in membrane bioreactor (MBR) and micro-polluted water embrane method are directly filtered processing, confirmation has the effect of auxiliary decelerating membrane pollution.The technology of utilizing at present coagulate sludge and filter cloth to form Dynamic Membrane focuses mostly in surface water processing and middle water recovering process, and minority has only been emphasized the booster action to activated sludge process for the case of sewage disposal, and the not mentioned utilization to resource in sewage.During common filtering cloth filtering pool design, owing to more paying close attention to quality problem, adopt separated type configuration more.
Summary of the invention
The object of the invention is for overcoming the deficiency of existing traditional active sludge treatment technology, propose a kind of for the pretreated integrated coagulation of municipal sewage as a resource filter cloth reactor directly, the present invention is by the direct separated municipal sewage of filter cloth Dynamic membrane, in effectively concentrated sewage, organic carbon source is beneficial to anaerobic technology and reclaims the energy, the combination of coagulation process has slowed down membrane fouling rate, has saved energy consumption, and for subsequent technique provides pretreatment, alleviated the processing load of subsequent technique.
It is a kind of for the pretreated integrated coagulation of municipal sewage as a resource filter cloth reactor directly that the present invention proposes, it is characterized in that, this reactor mainly comprises box pond body, water inlet coagulating chamber, condensing, is arranged on rotatable filter cloth assembly and self-cleaning equipment in the body of box pond; This rotatable filter cloth assembly is comprised of fiber filter cloth, rotating disk skeleton, hollow water outlet shaft and driving motor, and self-cleaning equipment is comprised of self-cleaning water-distribution nozzle, self-cleaning return duct and flushing pump; This box pond body is flat cuboid, and the pond body narrow wall of one side upper end is provided with overflow water inlet mouth and is communicated with a sidewall of water inlet coagulating chamber, in water inlet coagulating chamber, the first agitator is installed, and another sidewall of water inlet coagulating chamber has total water inlet; The narrow wall of the opposite side bottom of box pond body is communicated with the self-cleaning return duct of self-cleaning equipment; Self-cleaning return duct is fixedly connected with on the narrow wall of pond body, and self-cleaning return duct one end is connected with flushing delivery side of pump, and the other end is connected with self-cleaning water-distribution nozzle in the body of box pond; This body bottom, box pond is connected with condensing upper end, in condensing lower end, is provided with mud discharging mouth, and bucket top is provided with the second agitator; The hollow water outlet shaft two ends of described rotatable filter cloth assembly are fixed on two middle side parts of the wide wall of box pond body, and hollow water outlet shaft is communicated with in the body of box pond; The sealing of hollow water outlet shaft one end is also connected with driving motor, and the other end is connected with the total delivery port being arranged on the body wall of box pond; Described fiber filter cloth is wrapped in rotating disk skeleton periphery, and rotating disk skeleton is fixedly connected with hollow water outlet shaft.
The invention has the beneficial effects as follows:
The present invention synchronously realizes sewage pretreatment and organic carbon source is concentrated, adopts integrated configuration, has saved occupation of land.Simultaneously, this technology adopts the mode being uniformly mixed with concentrate wash cycles, reduced the biological organic carbon source loss that in activated sludge process, aeration process brings, strengthened the coagulation process in concentrate, improved the stability of coagulation filter cloth dynamic membrane system, promote thickening efficiency, be conducive to the enrichment of sewage carbon source.
The present invention is used in conjunction by coagulation process and filter process, without sedimentation basin and large volume aeration tank are set, simplifies sewage disposal flow process, improves sewage treating efficiency.Coagulation process forms Dynamic Membrane on filter cloth surface, improves filter-cloth filtering precision, increases organic carbon source and holds back concentrated effect, slows down the irreversible membrane fouling of filter cloth.Simultaneously, the reversible membrane fouling resistance that Dynamic Membrane cake layer brings can be removed by the self-cleaning equipment of automation and mechanization, effectively solve the pollution problem of filter-cloth filtering process, make reactor monolith maintain higher flux level, realize the effective of organic carbon source in municipal sewage high-efficiency pretreatment and water and concentrate.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.In figure:
1. box-type shell, 2. water inlet coagulating chamber, 3. total water inlet, 4-1. agitator, 4-2. agitator, 5. overflow water inlet mouth, 6. fiber filter cloth, 7. rotating disk skeleton, 8. hollow water outlet shaft, 9. total delivery port, 10. driving motor, 11. self-cleaning water-distribution nozzles, 12. self-cleaning return ducts, 13. flushing pumps, 14. overfalls, 15. condensings, 16. mud discharging mouths
Fig. 2 is the generalized section of filter cloth assembly of the present invention.In figure:
3. total water inlet, 5. overflow water inlet mouth, 6. fiber filter cloth, 7. rotating disk skeleton, 8. hollow water outlet shaft, 9. total delivery port, 10. driving motor, 11. self-cleaning water-distribution nozzles, 15. condensings
The specific embodiment
Below in conjunction with accompanying drawing, describe structure and characteristics of the present invention in detail:
The present invention propose for the pretreated integrated coagulation of municipal sewage as a resource filter cloth reactor directly, its structure as shown in Figure 1, mainly consists of box pond body 1, water inlet coagulating chamber 2, total water inlet 3, agitator 4-1, agitator 4-2, overflow water inlet mouth 5, fiber filter cloth 6, rotating disk skeleton 7, hollow water outlet shaft 8, total delivery port 9, driving motor 10, self-cleaning water-distribution nozzle 11, self-cleaning return duct 12, flushing pump 13, overfall 14, condensing 15 and mud discharging mouth 16.Wherein, fiber filter cloth 6, rotating disk skeleton 7, hollow water outlet shaft 8 and driving motor 10 form rotatable filter cloth assembly, and self-cleaning water-distribution nozzle 11, self-cleaning return duct 12 and flushing pump 13 form self-cleaning equipment.Box pond body 1 is flat cuboid, and the pond body narrow wall of one side upper end is communicated with a sidewall of water inlet coagulating chamber 2 by overflow water inlet mouth 5, and another sidewall that the first agitator 4-1 water inlet coagulating chamber 2 is installed in water inlet coagulating chamber 2 has total water inlet 3; The narrow wall of body opposite side bottom, pond is communicated with self-cleaning return duct 12 and overfall 14 is established on top, and hollow water outlet shaft 8 is fixed on two middle side parts of the wide wall of box pond body, and hollow water outlet shaft is communicated with box pond body is interior; This body bottom, box pond is connected with condensing 15 upper ends, and mud discharging mouth 16 is arranged on condensing 15 lower ends, and bucket top is provided with the second agitator 4-2; Fiber filter cloth 6 is wrapped in rotating disk skeleton 7 peripheries, and rotating disk skeleton 7 is fixedly connected with hollow water outlet shaft 8, and hollow water outlet shaft 8 one end sealings are also connected with driving motor 10, and the other end is connected with the total delivery port 9 being arranged on the body wall of box pond; Self-cleaning return duct 12 is fixedly connected with on the narrow wall of pond body, and one end is connected with the outlet of flushing pump 13, and the other end is connected with self-cleaning water-distribution nozzle 11 in pond.
Above-mentioned integrated coagulation directly each parts specific embodiment of filter cloth reactor is respectively described below:
Pond body 1 and coagulating chamber 2 are made by corrosion resistant plate, pond body 1 size 1150mm*860mm*L, and L determines according to filter cloth component count N, L=200*N.The size of coagulating chamber 2 designs according to flow of inlet water, makes flow of inlet water maintain the time of staying at 1 ~ 3 minute.Agitator requires rotating speed adjustable, the range of speeds 40 ~ 1200rpm, the agitator that for example German IKA company produces.
The embodiment concrete structure of described rotatable filter cloth assembly as shown in Figure 2.Rotating disk skeleton consists of two patty skeletons, disk diameter 750mm, rotating disk outer arranges outer skeleton, in rotating disk, edge arranges inner frame, inner frame is communicated with hollow water outlet shaft limbers with the limbers of the inner frame of hollow water outlet shaft 8 junctions, water is pooled in hollow water outlet shaft and collects, rotating disk skeleton periphery parcel fiber filter cloth 6 forms filter cloth rotating disk.Hollow water outlet shaft 8 is arranged in the body of pond, and one end is connected with total delivery port 9, and other end sealing connection for transmission motor 10, have limbers on hollow water outlet shaft tube wall, with the corresponding setting in limbers of rotating disk inner frame.
Described fiber filter cloth 6, adopts terylene or polypropylene fibre to make, and the filter cloth model of selecting distributes and determines according to dirty water pollutant particle diameter.
The rotatable filter cloth assembly of the present invention can monolithic or the coaxial coupling of multi-disc filter cloth rotating disk, and each filter cloth rotating disk can be synchronously or asynchronous rotary, and velocity of rotation is adjustable, uses the quantity of filter cloth rotating disk and the filter cloth gross area to be determined by factors such as organic contamination substrate concentration and sewage quantities.
Described self-cleaning return duct 12, one end is connected with Ti Zhaibi bottom, pond, and the other end, in access pond, the narrow wall of body homonymy upper end, pond, connects with self-cleaning water-distribution nozzle 11, connects flushing pump 13 in the middle of self-cleaning return duct.
Above-mentioned integrated coagulation is directly in filter cloth reactor, described self-cleaning water-distribution nozzle 11, and main body is tubular type, one end is connected with self-cleaning return duct 12, other end sealing.Tube type blow head sidewall has a row water jet, and water jet place establishes sharp mouth.
Self-cleaning return duct 12, self-cleaning water-distribution nozzle 11 and flushing pump 13 all adopt conventional products;
Described condensing 15, is the funnel being spliced by four swash plates in the unlimited bottom of pond body, and wide wall skew back plate slope is between 45 ° ~ 60 °, and narrow wall skew back plate slope is between 30 ° ~ 45 °.
Principle of the present invention and running are:
Raw sewage enters from total water inlet 3, through water inlet coagulating chamber 2 dosing coagulants, by the first agitator 4-1, stirred after coagulation, inflow reactor pond body is inner, is continued to be uniformly mixed, and carry out coagulation filter cloth dynamic membrane filtering through rotatable filter cloth assembly by the second agitator 4-2.The flco that coagulation forms and the suspended material in raw sewage are filtered and hold back by rotatable filter cloth assembly, and the heavy mud of reactor bottom is discharged by the mud discharging mouth 16 under condensing 15, collects and treats subsequent treatment.When filter cloth flux significantly reduces, need to utilize self-cleaning equipment to clean.Cleaning process is completed by self-cleaning return duct 12 and self-cleaning water-distribution nozzle 11, filter cloth rotating disk slowly rotates, utilize flushing pump 13 backflow concentrates at self-cleaning water-distribution nozzle 11 places, to produce high pressure and realize the washing away of cloth sheet surface contamination layer, strengthen the mixing of concentrate simultaneously.After cloth sheet rotates a circle, self-cleaning process finishes, and the cleaning frequency determines according to concentrate character.About 0.5 ~ 1h of sewage time of staying in reactor, carries out spoil disposal every 1h.After filtering, water outlet is discharged through total delivery port 9.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. one kind for the pretreated integrated coagulation of municipal sewage as a resource filter cloth reactor directly, it is characterized in that, this reactor mainly comprises box pond body, water inlet coagulating chamber, condensing, is arranged on rotatable filter cloth assembly and self-cleaning equipment in the body of box pond; This rotatable filter cloth assembly is comprised of fiber filter cloth, rotating disk skeleton, hollow water outlet shaft and driving motor, rotatable filter cloth assembly carries out coagulation filter cloth dynamic membrane filtering, the flco that coagulation forms and the suspended material in raw sewage are filtered and hold back by rotatable filter cloth assembly, self-cleaning equipment is comprised of self-cleaning water-distribution nozzle, self-cleaning return duct and flushing pump, utilize flushing pump backflow concentrate at self-cleaning water-distribution nozzle place, to produce high pressure and realize the washing away of cloth sheet surface contamination layer, strengthen the mixing of concentrate simultaneously; This box pond body is flat cuboid, and the pond body narrow wall of one side upper end is provided with overflow water inlet mouth and is communicated with a sidewall of water inlet coagulating chamber, in water inlet coagulating chamber, the first agitator is installed, and another sidewall of water inlet coagulating chamber has total water inlet; The narrow wall of the opposite side bottom of box pond body is communicated with the self-cleaning return duct of self-cleaning equipment; Self-cleaning return duct is fixedly connected with on the narrow wall of pond body, and self-cleaning return duct one end is connected with flushing delivery side of pump, and the other end is connected with self-cleaning water-distribution nozzle in the body of box pond; This body bottom, box pond is connected with condensing upper end, in condensing lower end, is provided with mud discharging mouth, and bucket top is provided with the second agitator; The hollow water outlet shaft two ends of described rotatable filter cloth assembly are fixed on two middle side parts of the wide wall of box pond body, and hollow water outlet shaft is communicated with in the body of box pond; The sealing of hollow water outlet shaft one end is also connected with driving motor, and the other end is connected with the total delivery port being arranged on the body wall of box pond; Described fiber filter cloth is wrapped in rotating disk skeleton periphery, and rotating disk skeleton is fixedly connected with hollow water outlet shaft.
2. integrated coagulation as claimed in claim 1 filter cloth reactor directly, it is characterized in that, the rotating disk skeleton of described rotatable filter cloth assembly forms rotating disk by two patty skeletons, rotating disk outer arranges outer skeleton, in rotating disk, edge arranges inner frame, inner frame is communicated with hollow water outlet shaft limbers with the limbers of the inner frame of hollow water outlet shaft connection place, water is pooled in hollow water outlet shaft and collects, and rotating disk skeleton periphery parcel fiber filter cloth forms filter cloth rotating disk.
3. integrated coagulation as claimed in claim 1 filter cloth reactor directly, is characterized in that, described rotatable filter cloth assembly can monolithic or the coaxial coupling of multi-disc filter cloth rotating disk, the synchronous or asynchronous rotary of each filter cloth rotating disk, and velocity of rotation is adjustable.
4. integrated coagulation as claimed in claim 1 filter cloth reactor directly, it is characterized in that, the funnel of described condensing for being spliced by four swash plates in the unlimited bottom of pond body, wide wall skew back plate slope is between 45 °～60 °, and narrow wall skew back plate slope is between 30 °～45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210239857.XA CN102764535B (en) | 2012-07-10 | 2012-07-10 | Integrated coagulation and direct-filtration filter cloth reactor for urban sewage recycling pretreatment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210239857.XA CN102764535B (en) | 2012-07-10 | 2012-07-10 | Integrated coagulation and direct-filtration filter cloth reactor for urban sewage recycling pretreatment |
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| Publication Number | Publication Date |
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| CN102764535A CN102764535A (en) | 2012-11-07 |
| CN102764535B true CN102764535B (en) | 2014-10-22 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4217115B2 (en) * | 2003-06-30 | 2009-01-28 | 三機工業株式会社 | Fluid nozzle structure and sludge removal method |
| CN201267736Y (en) * | 2008-09-05 | 2009-07-08 | 浙江旺能环保股份有限公司 | Self-cleaning type wastewater filtering equipment |
| CN101991982A (en) * | 2009-08-17 | 2011-03-30 | 株式会社韩国环境技术 | Filter having function of self cleaning and self cleaning method thereof |
-
2012
- 2012-07-10 CN CN201210239857.XA patent/CN102764535B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4217115B2 (en) * | 2003-06-30 | 2009-01-28 | 三機工業株式会社 | Fluid nozzle structure and sludge removal method |
| CN201267736Y (en) * | 2008-09-05 | 2009-07-08 | 浙江旺能环保股份有限公司 | Self-cleaning type wastewater filtering equipment |
| CN101991982A (en) * | 2009-08-17 | 2011-03-30 | 株式会社韩国环境技术 | Filter having function of self cleaning and self cleaning method thereof |
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| CN102764535A (en) | 2012-11-07 |
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