CN102451618A - System and method for carrying out gas washing on immersed hollow fibrous membranes - Google Patents
System and method for carrying out gas washing on immersed hollow fibrous membranes Download PDFInfo
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- CN102451618A CN102451618A CN2010105259669A CN201010525966A CN102451618A CN 102451618 A CN102451618 A CN 102451618A CN 2010105259669 A CN2010105259669 A CN 2010105259669A CN 201010525966 A CN201010525966 A CN 201010525966A CN 102451618 A CN102451618 A CN 102451618A
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Abstract
The invention relates to a method for carrying out gas washing on an immersed hollow fibrous membrane device, wherein the immersed hollow fibrous membrane device is placed in a membrane pool, and the method comprises the following step of supplying gas for immersed hollow fibrous membrane components by using two gas supply devices so as to carry out two-stage aeration, wherein, in the low-gas-quantity-stage aeration, appropriate stirring is maintained so that the immersed hollow fibrous membrane components carry out normal water production, and in the high-gas-quantity-stage aeration, the immersed hollow fibrous membrane components stop producing water, so that a hollow fibrous membrane is washed effectively; and through the alternate implementation of different stages of aeration, the gas consumption for washing gas is reduced, so that the pollution to the hollow fibrous membrane is reduced under the condition of low energy consumption, and the hollow fibrous membrane can be washed effectively, thereby prolonging the service life of the immersed hollow fibrous membrane device. Meanwhile, the invention also relates to a system for carrying out gas washing on an immersed hollow fibrous membrane device, which is applied to the gas washing of an immersed hollow fibrous membrane device.
Description
Technical field
The present invention relates to the immersion hollow fiber membrane device, relate to the air purge system and method for immersion hollow fiber membrane device more specifically, clean the hollow-fibre membrane surface with the gas with various combination and pollute, keep the water-flowing amount of film to prevent film.
Background technology
The immersion hollow-fibre membrane especially not only is subject to the obstruction of suspension such as mud in the water but also polluted by the organic matter in the water in membrane bioreactor in water; Thereby cause the decline of filtration flux; Can cause the function of film system to worsen under the serious situation. in order to keep the filtration flux of film system, generally can avoid film to pollute through the method for aeration.Aeration can adopt continuous, also can adopt intermittently.Bubble rubs doughnut mutually and takes away the pollutant on film surface, and the effect of cleaning depends on that tolerance, bubble size, bubble distribute, the density of doughnut and distribution etc.For fear of the pollution of film, tolerance needs very big, and the power consumption of air purge is quite big, in membrane bioreactor, has often accounted for the major part of energy.
The pollution of film mainly contains two parts.A part is a macromolecular compound, colloidal type such as microbe metabolite, polysaccharide, protein etc.; Another part is a suspended solid.First's material is evenly distributed in the sewage, keeps the stirring of sewage, and the pressure of controlled filter can prevent concentration polarization.The second portion material has settleability, is deposited on the film surface easily and causes dirty stifled.In case film pollutes aggravation, must remove surface contaminant rapidly, worsen to prevent to pollute rapidly.Therefore, how to improve air purge efficient, reaching optimal cleaning effect with minimum power consumption is the problem that must consider.
Summary of the invention
An object of the present invention is to provide an air purge system and method that is applicable to the immersion hollow fiber membrane device, remove the pollution on film surface rapidly.Native system and method have reduced makes gas consumption, has improved air purge efficient, reaches optimal cleaning effect with minimum power consumption.
The inventor recognizes that the process that film pollutes is progressive from the research of immersed membranes pollution course.Usually the cleaning of film adopts continuous air purge to keep the long-term operation continuously of film, is 90m like tolerance
3/ hr/m
2Membrane cisterna.Say that generally keeping film does not receive concentration polarization and pollute required tolerance and be different to remove and pollute no required tolerance at certain phase, adopt continuous aeration or consume energy too high or cleaning strength is not enough.Adopting two stage aerations can be to reduce to pollute in low tolerance, can when high tolerance, remove pollution again.Therefore in producing the water operation, low tolerance is 60m for example
3/ hr/m
2Membrane cisterna is used to slow down the pollution of film.However, low excessively tolerance is appointed and can be caused the pollutant of film progressively to accumulate.To remove these pollutants effectively, must be periodically to clean than atm number, 120m for example
3/ hr/m
2Membrane cisterna.
The inventor finds after deliberation, if adopt two stage aerations, can avoid long-term a large amount of aeration to waste energy, and the atm number in the time of can guaranteeing to clean is simultaneously removed the pollutant on film surface effectively, thereby prolongs the service life of immersion hollow fiber membrane device.For example, preceding 9 minutes is 60m
3/ hr/m
2Membrane cisterna, 1 minute is 120m
3/ hr/m
2Membrane cisterna, average tolerance then is (60 * 9+120 * 1) ÷ 10=66m
3/ hr/m
2Membrane cisterna is with continuous 90m
3/ hr/m
2Membrane cisterna tolerance is compared, and preceding 9 minute volumes are little by 50%, and back 1 minute volume is big by 50%, and total tolerance has reduced about 36%.
The present invention provides the air purge system of an immersion hollow fiber membrane device, and its immersion hollow fiber membrane device contains the immersion hollow fiber film assembly that is placed in the membrane cisterna.Said air purge system, its spy comprises: aeration tube, the solarization air cap that distributing on it is placed on the below of the immersion hollow fiber film assembly in the membrane cisterna; Interim Aeration fan, air feed is given aeration tube; Wherein the tolerance of at least one interim aeration is low, keeps an amount of stirring; Wherein the tolerance of at least one interim aeration is high, effectively cleans hollow-fibre membrane; Air supply pipe connects said blower fan and aeration tube; The aeration valve is positioned over air supply pipe, controls the tolerance that said blower fan air feed is given aeration tube; In running, when the tolerance of interim aeration was low, the immersion hollow fiber film assembly normally produced water, and when the tolerance of interim aeration was high, the immersion hollow fiber film assembly stopped to produce water, and hollow-fibre membrane gets effective washing; Alternately producing of different phase property aeration reduced the tolerance consumption of gas washing, effectively cleans hollow-fibre membrane, prolongs the service life of immersion hollow fiber membrane device.
Preferably, said interim Aeration fan comprises a stirring blower fan and a cleaning blower fan; Said stirring blower fan is used for the low interim aeration of tolerance, keeps an amount of stirring; Said cleaning blower fan is used for the high interim aeration of tolerance, effectively cleans hollow-fibre membrane; In running, when said cleaning blower fan was opened, said stirring blower fan was held open or cuts out, and therefore the interim aeration of high tolerance is provided jointly by stirring and cleaning blower fan or provides separately by cleaning blower fan.
Preferably, said aeration tube comprises an aeration tube; It is connected to by a public air supply pipe and stirs and the cleaning blower fan, stirs blower fan simultaneously and is controlled respectively by independent aeration valve with the cleaning blower fan.
Preferably, said aeration tube comprises two aeration tubes; An one of which aeration tube is connected to the stirring blower fan by an air supply pipe, and its another aeration tube is connected to the cleaning blower fan by another air supply pipe; Different aeration valves place different air supply pipes respectively and control respectively and stir blower fan and clean blower fan.
Preferably, when the immersion hollow fiber membrane device contained more than an immersion hollow fiber film assembly, said aeration tube placed the below of each hollow fiber film assembly.
Preferably, gas speed is 8-25m/s at the solarization air cap place.In air supply pipe, be lower than 8m/s.
The present invention provides the air purge method of an immersion hollow fiber membrane device simultaneously, and its immersion hollow fiber membrane device contains the immersion hollow fiber film assembly that is placed in the membrane cisterna.Said air purge method comprises the steps: to offer the low interim aeration of immersion hollow fiber film assembly tolerance, keeps an amount of stirring, and the immersion hollow fiber film assembly normally produces water; Offer the high interim aeration of immersion hollow fiber film assembly tolerance, the immersion hollow fiber film assembly stops to produce water, and hollow-fibre membrane gets effective washing; Alternately producing of different phase property aeration reduced the tolerance consumption of gas washing, effectively cleans hollow-fibre membrane, prolongs the service life of immersion hollow fiber membrane device.
Preferably, said different phase property aeration is provided by the air purge system of an immersion hollow fiber membrane device; The air purge system of said immersion hollow fiber membrane device comprises: aeration tube, and the solarization air cap that distributing on it is placed on the below of the immersion hollow fiber film assembly in the membrane cisterna; Interim Aeration fan, air feed is given aeration tube; Wherein the tolerance of at least one interim aeration is low; Wherein the tolerance of at least one interim aeration is high; Air supply pipe connects said blower fan and aeration tube; The aeration valve is positioned over air supply pipe, controls the tolerance that said blower fan air feed is given aeration tube.
Description of drawings
Fig. 1 is the high-level schematic functional block diagram of an embodiment of a kind of immersion hollow-fibre membrane of the present invention air purge system;
Fig. 2 is the high-level schematic functional block diagram of another embodiment of a kind of immersion hollow-fibre membrane of the present invention air purge system;
Fig. 3 is the high-level schematic functional block diagram of an embodiment who is used for a plurality of film devices of a kind of immersion hollow-fibre membrane of the present invention air purge system;
Fig. 4 is the high-level schematic functional block diagram of another embodiment that is used for a plurality of film devices of a kind of immersion hollow-fibre membrane of the present invention air purge system.
The specific embodiment
For making the object of the invention, technical scheme and advantage clearer, the present invention is done to describe in detail further below in conjunction with accompanying drawing.
Fig. 1 is the high-level schematic functional block diagram of an embodiment of a kind of immersion hollow-fibre membrane of the present invention air purge system.As shown in Figure 1, this immersion hollow-fibre membrane air purge system comprises: aeration tube 4, solarization air cap 5 stirs blower fan 6, cleans blower fan 7, stirs aeration valve 8, cleans aeration valve 9 and air supply pipe 11.Said solarization air cap 5 is distributed on the aeration tube 4; Said air supply pipe 11 connects aeration tube 4 to stirring blower fan 6 and cleaning blower fan 7, stirs 8 controls of aeration valve simultaneously by stirring the tolerance that blower fan 6 outputs to aeration tube, cleans 9 controls of aeration valve are outputed to aeration tube by cleaning blower fan 7 tolerance.Name that it should be noted that different blower fans and aeration valve is the convenience in order to narrate.In actual applications, stirring blower fan can be identical with the cleaning blower fan, thereby can be used alternatingly.
In the sewage disposal of common immersion hollow-fibre membrane, immersion hollow fiber film assembly 3 is immersed in the sewage 2, is placed in the membrane cisterna 1, and filtered water is discharged by producing water pump 10.When said immersion hollow-fibre membrane air purge system applies when cleaning hollow-fibre membrane, said aeration tube 4 is installed below immersion hollow fiber film assembly 3, the air feed that solarization air cap 5 importings that distribute it on derive from blower fan is in membrane cisterna 1.When operation, produce water pump 10 and aspirate the product water, stir blower fan 6 and start for a long time, stir aeration valve 8 and open continuous air feed generation stirring action.Crossed certain hour at interval as 9 minutes, produced water pump 10 and stop to produce water a period of time,, cleaned blower fan 7 this moment and start, cleaned a large amount of air feed rinsing membrane modules 3 of aeration valve 9 unlatchings as 1 minute.Air supply pipe 11 should satisfy certain gas speed scope with solarization air cap 5 designs.Preferably, gas speed is 8-25m/s at the solarization air cap place.In air supply pipe, be lower than 8m/s.This method is only overlapped aeration tube and air supply pipe and two typhoon machines one with one and is worked.。
Fig. 2 is the high-level schematic functional block diagram of another embodiment of a kind of immersion hollow-fibre membrane of the present invention air purge system.Immersion hollow-fibre membrane air purge system as shown in Figure 2 and difference shown in Figure 1 are two cover aeration tube and air supply pipes, separately use two typhoon machine air feed.As shown in Figure 2, aeration tube 4B is connected to by air supply pipe 11 and stirs blower fan 6, and aeration tube 4A is connected to by air supply pipe 12 and cleans blower fan 7, and solarization air cap 5A, 5B are distributed in aeration tube 4B respectively, and 4A is last.Immersion hollow fiber film assembly 3 is immersed in the sewage 2, is placed in the membrane cisterna 1, and said aeration tube 4A and 4B are installed below membrane module.When operation, produce water pump 10 and aspirate the product water, stir blower fan 6 and start for a long time, stir aeration valve 8 and open continuous air feed generation stirring action.Crossed certain hour at interval as 9 minutes, produced water pump 10 and stop to produce water a period of time,, cleaned blower fan 7 this moment and start, cleaned a large amount of air feed rinsing membrane modules 3 of aeration valve 9 unlatchings as 1 minute.Air supply pipe 11 and 12 and solarization air cap 4B and 5B design should satisfy certain gas speed scope.Preferably, gas speed is 8-25m/s at the solarization air cap place.In air supply pipe, be lower than 8m/s.
Fig. 3 is the high-level schematic functional block diagram of an embodiment who is used for a plurality of film devices of a kind of immersion hollow-fibre membrane of the present invention air purge system, and for outstanding inventive principle, some of them functional module such as aeration valve do not show.As shown in Figure 3, an aeration tube is installed in each immersion hollow fiber film assembly below in this device, the solarization air cap that wherein distributing on the aeration tube, and through air supply pipe with stir blower fan and link to each other with the cleaning blower fan.Water is produced in the suction of product water pump when operation, stirs the continuous air feed of the long-term startup of blower fan and produces stirring action.Crossed certain hour at interval as 9 minutes, produced water pump and stop to produce water a period of time,, cleaned blower fan this moment and open a large amount of air feed cleaning film devices as 1 minute.Air supply pipe and solarization air cap design should be satisfied certain gas speed scope.Preferably, gas speed is 8-25m/s at the solarization air cap place.In air supply pipe, be lower than 8m/s.。
Fig. 4 is the high-level schematic functional block diagram of another embodiment that is used for a plurality of film devices of a kind of immersion hollow-fibre membrane of the present invention air purge system, and for outstanding inventive principle, some of them functional module such as aeration valve do not show.As shown in Figure 4, two aeration tubes are installed in each immersion hollow fiber film assembly below in this device, the solarization air cap that wherein distributing on the aeration tube, and via dividing other air supply pipe and stirring blower fan and separate with the cleaning blower fan and link to each other.In application, two cover aeration tubes and air supply pipe are by stirring or clean blower fan air feed respectively.Water is produced in the suction of product water pump when operation, stirs the continuous air feed of the long-term startup of blower fan and produces stirring action.Crossed certain hour at interval as 9 minutes, produced water pump and stop to produce water a period of time,, cleaned blower fan this moment and open a large amount of air feed cleaning film devices as 1 minute.Air supply pipe and solarization air cap design should be satisfied certain gas speed scope.Preferably, gas speed is 8-25m/s at the solarization air cap place.In air supply pipe, be lower than 8m/s.。
The specific embodiment
With reference to Fig. 1, use a slice immersion hollow fiber film assembly 3, the wide 571mm of assembly, high 815mm, effective film area are 10m
2, the hollow-fibre membrane silk adopts external diameter 1.2mm, Kynoar (PVDF) hollow-fibre membrane of nominal pore size 0.1 μ m; Above-mentioned immersed membranes assembly upper and lower end parts bonding is fixed, put into the membrane cisterna 1 of vertical setting, the available depth of membrane cisterna is 1.1m; Water in the membrane cisterna is handled the sewage in the oxygen pond well for biology, adopts the circulation of outer loop pump, and aeration tube 4 is installed in the membrane module bottom; Be distributed with solarization air cap 5 on the aeration tube, when real estate discharge (200L/hr) is moved, produce water pump 10 suctions and produce water, blower fan 6 starts for a long time; Stir aeration valve 8 and open continuous air feed generation stirring action, air demand is 2.5m
3/ hr.Spend 9 minutes, produce water pump 10 and stopped to produce water 1 minute, blower fan 7 startups this moment are cleaned aeration valve 9 and are opened a large amount of air feed rinsing membrane modules 3, and air demand is 5m
3/ hr.Can be used alternatingly two typhoon machine air feed during air feed in this device, adopt the film air purge of this kind mode, the film system can reach operation steady in a long-term.
With reference to Fig. 2 of accompanying drawing, use a slice immersion hollow fiber film assembly 3, the wide 571mm of assembly, high 815mm, effective film area are 10m
2, the hollow-fibre membrane silk adopts external diameter 1.2mm, Kynoar (PVDF) hollow-fibre membrane of nominal pore size 0.1 μ m; Above-mentioned immersed membranes assembly upper and lower end parts bonding is fixed, put into the membrane cisterna 1 of vertical setting, the available depth of membrane cisterna is 1.2m; Water in the membrane cisterna is handled the sewage in the oxygen pond well for biology, adopts the circulation of outer loop pump, and two aeration tube 4A and 4B are installed in the membrane module bottom; Be distributed with solarization air cap 5A and 5B on the aeration tube, aeration tube adopts two typhoon machine air feed respectively.When real estate discharge (200L/hr) is moved, produce water pump 10 suctions and produce water, blower fan 6 starts for a long time, stirs the continuous air feed of aeration valve 8 unlatchings and produces stirring action, and air demand is 3m
3/ hr.Spend 9 minutes, produce water pump 10 and stopped to produce water 1 minute, blower fan 7 startups this moment are cleaned aeration valve 9 and are opened a large amount of air feed rinsing membrane modules 3, and air demand is 6m
3/ hr.Can be used alternatingly two typhoon machine air feed during air feed in this device.Adopt the film air purge of this kind mode, the film system can reach operation steady in a long-term.
Use the parallel complete film device of 4 covers, in every cover film device the multi-disc membrane module is housed, with reference to Fig. 3 of accompanying drawing, membrane module adopts wide 571mm, and high 815mm, effective film area are 10m
2The immersion curtain type film assembly, the film silk adopts external diameter 1.2mm, Kynoar (PVDF) the hollow-fibre membrane silk of nominal pore size 0.1 μ m.Above-mentioned immersed membranes device is put into the membrane cisterna that Aerobic Pond sewage is housed that available depth is 1.1m, and every cover film device bottom all is equipped with a cover aeration tube, is 20L/m at permanent film silk flux
2Move during hr, produce water pump 10 suctions and produce water, the continuous air feed of blower fan 6 long-term startups produces stirring action, and air demand is 2.5m
3/ sheet film hr.Spend 9 minutes, produce water pump 10 and stopped to produce water 1 minute, a large amount of air feed rinsing membrane modules 3 of blower fan 7 startups this moment, air demand is 5m
3/ sheet film hr.Can be used alternatingly two typhoon machine air feed during air feed in this device, adopt the film air purge of this kind mode, the film system can reach operation steady in a long-term.
Different with embodiment 3, every cover film device bottom all is equipped with two cover aeration tubes, adopts two typhoon machines by two cover air supply pipe air feed respectively.At permanent film silk flux is 20L/m
2Move during hr, produce water pump 10 suctions and produce water, the continuous air feed of blower fan 6 long-term startups produces stirring action, and air demand is 3m
3/ sheet film hr.Spend 9 minutes, produce water pump 10 and stopped to produce water 1 minute, a large amount of air feed rinsing membrane modules 3 of blower fan 7 startups this moment, air demand is 6m
3/ sheet film hr can be used alternatingly two typhoon machines during air feed.Adopt the film air purge of this kind mode, the film system can reach operation steady in a long-term.
The above is a preferred implementation of the present invention, not in order to restriction the present invention.Should be pointed out that for those skilled in the art, all within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. the air purge system of an immersion hollow fiber membrane device, its immersion hollow fiber membrane device contains the immersion hollow fiber film assembly that is placed in the membrane cisterna, and said air purge system is characterized in that, comprising:
Aeration tube, the solarization air cap that distributing on it is placed on the below of the immersion hollow fiber film assembly in the membrane cisterna;
The interim Aeration fan of two-way, air feed is given aeration tube; Wherein the tolerance of at least one interim aeration is low, keeps an amount of stirring; Wherein the tolerance of at least one interim aeration is high, effectively cleans hollow-fibre membrane;
Air supply pipe connects said blower fan and aeration tube;
The aeration valve is positioned over air supply pipe, controls unlatching and tolerance that said blower fan air feed is given aeration tube;
In running, when the tolerance of interim aeration was low, the immersion hollow fiber film assembly normally produced water, and when the tolerance of interim aeration was high, the immersion hollow fiber film assembly stopped to produce water, and hollow-fibre membrane gets effective washing; Alternately producing of different phase property aeration reduced the tolerance consumption of gas washing, effectively cleans hollow-fibre membrane, prolongs the service life of immersion hollow fiber membrane device.
2. the air purge system of immersion hollow fiber membrane device as claimed in claim 1 is characterized in that, said interim Aeration fan comprises a stirring blower fan and a cleaning blower fan; Said stirring blower fan is used for the low interim aeration of tolerance, keeps an amount of stirring; Said cleaning blower fan is used for the high interim aeration of tolerance, effectively cleans hollow-fibre membrane; In running, when said cleaning blower fan was opened, said stirring blower fan was held open or cuts out, and therefore the interim aeration of high tolerance is provided jointly by stirring and cleaning blower fan or provides separately by cleaning blower fan.
3. the air purge system of immersion hollow fiber membrane device as claimed in claim 2 is characterized in that, said aeration tube comprises an aeration tube; It is connected to by a public air supply pipe and stirs and the cleaning blower fan, stirs blower fan simultaneously and is controlled respectively by independent aeration valve with the cleaning blower fan.
4. the air purge system of immersion hollow fiber membrane device as claimed in claim 2 is characterized in that, said aeration tube comprises two aeration tubes; An one of which aeration tube is connected to the stirring blower fan by an air supply pipe, and its another aeration tube is connected to the cleaning blower fan by another air supply pipe; Different aeration valves place different air supply pipes respectively and control respectively and stir blower fan and clean blower fan.
5. the air purge system of immersion hollow fiber membrane device as claimed in claim 1 is characterized in that, when the immersion hollow fiber membrane device contained more than an immersion hollow fiber film assembly, said aeration tube placed the below of each hollow fiber film assembly.
6. the air purge system of immersion hollow fiber membrane device as claimed in claim 1 is characterized in that gas speed is 8-25m/s at the solarization air cap place, in air supply pipe, is lower than 8m/s.
7. the air purge method of an immersion hollow fiber membrane device, its immersion hollow fiber membrane device contains the immersion hollow fiber film assembly that is placed in the membrane cisterna, and said air purge method is characterized in that said method comprises the steps:
Offer the low interim aeration of immersion hollow fiber film assembly tolerance, keep an amount of stirring, the immersion hollow fiber film assembly normally produces water;
Offer the high interim aeration of immersion hollow fiber film assembly tolerance, the immersion hollow fiber film assembly stops to produce water, and hollow-fibre membrane gets effective washing;
Alternately producing of different phase property aeration reduced the tolerance consumption of gas washing, effectively cleans hollow-fibre membrane, prolongs the service life of immersion hollow fiber membrane device.
8. the air purge method of immersion hollow fiber membrane device as claimed in claim 7 is characterized in that, said different phase property aeration is provided by the air purge system of an immersion hollow fiber membrane device; The air purge system of said immersion hollow fiber membrane device comprises:
Aeration tube, the solarization air cap that distributing on it is placed on the below of the immersion hollow fiber film assembly in the membrane cisterna;
Interim Aeration fan, air feed is given aeration tube; Wherein the tolerance of at least one interim aeration is low; Wherein the tolerance of at least one interim aeration is high;
Air supply pipe connects said blower fan and aeration tube;
The aeration valve is positioned over air supply pipe, controls the tolerance that said blower fan air feed is given aeration tube.
9. the air purge method of immersion hollow fiber membrane device as claimed in claim 8 is characterized in that, said interim Aeration fan comprises a stirring blower fan and a cleaning blower fan; Said stirring blower fan is used for the low interim aeration of tolerance, keeps an amount of stirring; Said cleaning blower fan is used for the high interim aeration of tolerance, effectively cleans hollow-fibre membrane; In running, when said cleaning blower fan was opened, said stirring blower fan was held open or cuts out, and therefore the interim aeration of high tolerance is provided jointly by stirring and cleaning blower fan or provides separately by cleaning blower fan.
10. the air purge method of immersion hollow fiber membrane device as claimed in claim 9 is characterized in that, said aeration tube comprises an aeration tube; It is connected to by a public air supply pipe and stirs and the cleaning blower fan, stirs blower fan simultaneously and is controlled respectively by independent aeration valve with the cleaning blower fan.
11. the air purge method of immersion hollow fiber membrane device as claimed in claim 9 is characterized in that, said aeration tube comprises two aeration tubes; An one of which aeration tube is connected to the stirring blower fan by an air supply pipe, and its another aeration tube is connected to the cleaning blower fan by another air supply pipe; Different aeration valves place different air supply pipes respectively and control respectively and stir blower fan and clean blower fan.
12. the air purge method of immersion hollow fiber membrane device as claimed in claim 8 is characterized in that, when the immersion hollow fiber membrane device contained more than an immersion hollow fiber film assembly, said aeration tube placed the below of each hollow fiber film assembly.
13. the air purge method of immersion hollow fiber membrane device as claimed in claim 8 is characterized in that gas speed is 8-25m/s at the solarization air cap place, in air supply pipe, is lower than 8m/s.
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| CN103624041A (en) * | 2013-11-13 | 2014-03-12 | 烟台仁达自动化装备科技有限公司 | Washing device of deepwater net cage |
| JP2019141779A (en) * | 2018-02-20 | 2019-08-29 | 栗田工業株式会社 | Operation method of aerobic biological treatment apparatus |
| JP2019141780A (en) * | 2018-02-20 | 2019-08-29 | 栗田工業株式会社 | Aerobic biological treatment apparatus |
| CN112798500A (en) * | 2021-02-26 | 2021-05-14 | 绵阳美能材料科技有限公司 | Filter element cleaning and detecting device |
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| JP2009233622A (en) * | 2008-03-28 | 2009-10-15 | Hitachi Ltd | Water treatment device |
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Application publication date: 20120516 |