CN103585888A - Immersed-type ultrafiltration membrane pool and on-line chemical cleaning method thereof - Google Patents
Immersed-type ultrafiltration membrane pool and on-line chemical cleaning method thereof Download PDFInfo
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- CN103585888A CN103585888A CN201210293086.2A CN201210293086A CN103585888A CN 103585888 A CN103585888 A CN 103585888A CN 201210293086 A CN201210293086 A CN 201210293086A CN 103585888 A CN103585888 A CN 103585888A
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Abstract
The invention relates to an immersed-type ultrafiltration membrane pool and an on-line maintaining and recovering chemical cleaning method thereof. According to the immersed-type ultrafiltration membrane pool, a pipeline system and a valve system are simplified as far as possible, so that pipeline arrangement of chemical cleaning circulation, a wastewater discharge system, a membrane pool water discharge system, a water back wash system, a gas back wash system, and the like is subjected to overall consideration, and sharing of part of pipelines and valves is realized. That is to say, a pump is used as a membrane pool filtration clean water suction pump and a membrane pool medicine cleaning water deliver pump; a pump is used as a membrane pool recovering chemical cleaning circulating pump and a membrane pool chemical cleaning effluent discharging pump; a valve is used as a membrane pool effluent discharging control valve and a membrane pool chemical cleaning circulating liquid feeding valve; a pipe is used as a membrane pool filtration clean water main pipe, a membrane pool back wash water main pipe, and a membrane pool chemical cleaning circulating discharging main pipe; and a pipe is used as a membrane pool chemical cleaning circulating main pipe and a membrane pool chemical washing effluent discharging main pipe.
Description
Technical field
The present invention relates to a kind of immersed ultrafiltration membrane pond, be specifically related to setting and on-line maintenance Chemical cleaning, the alkali cleaning of online restorative Chemical cleaning and the acid washing method of online restorative Chemical cleaning of various valves and pipeline in immersed ultrafiltration membrane pond.
Background technology
Milipore filter technique is described as third generation feedwater treatment method, can effectively ensure the turbidity of water outlet, can remove bacterium, algae, two worms in water completely, can also remove part virus.Along with China, adopt in recent years the successful development of PVC material high-quality milipore filter, the construction of ultrafiltration membrane treatment technique and operating cost are declined to a great extent.Conventional milipore filter post has tubular type, doughnut, plate and frame and rolling etc., in municipal water supply, conventionally adopt at present hollow-fibre membrane, during according to membrane filtration, see through the inside and outside relative position relation of liquid and film before film after stoste and film, hollow fiber ultrafiltration membrane is divided into again two kinds of inner pressed and external-compression types.In practical implementation, hyperfiltration membrane assembly comprises columnar membrane (claiming again container type film or tubular membrane) and two kinds of forms of submerged membrane, wherein columnar membrane refers to membrane component (also having the parts such as aquaporin material to be made of one film and supporter thereof) is received and is contained in container, the mode of using as membrane module.Container type film is generally pressed into water to be filtered with pump to internal tank, and the pressure that can bear is higher.Container type film can be both inner pressed, can be also external-compression type; Submerged ultrafiltration refers to hollow-fibre membrane is immersed in tank or pond, a kind of form membrane that the water-head before and after relying on or suction pump are filtered, and submerged membrane all belongs to external-compression type.
Submerged membrane system is in running, and the particle in former water can build up the outer surface at film, thereby the transmembrane pressure of filtration system is increased, and now ultrafiltration system will stop filtering the backwash of the line period of going forward side by side.Backwash process is exactly on the one hand ultrafiltration to be produced to water oppositely to see through film, in membrane stack bottom, by gas scouring abrasion, wash film silk surface to remove deposit simultaneously, after backwash finishes, the waste liquid in membrane cisterna is discharged.
Except day ordinary water flushing and air bump rinse operation, milipore filter can produce the phenomenon of the strainability decline causing due to obstruction after operation a period of time, now needs to carry out the Chemical cleaning of film.Membrance chemistry cleans and comprises maintainability Chemical cleaning and two processes of restorative Chemical cleaning.It is chemical enhanced backwash that maintainability cleans, and adopts suitable chemical agent solution to soak ultrafiltration membrane filaments, to slow down the deep layer of milipore filter, pollutes, and maintains ultrafiltration system flux; When maintainability Chemical cleaning is not enough to recover the strainability of film, should carry out restorative Chemical cleaning.Restorative Chemical cleaning can be divided into again alkali cleaning and two processes of pickling, both sequencings and medicament select because of film self-condition different.
The Chemical cleaning mode of milipore filter can be divided into on-line cleaning and off-line and clean two kinds, and so-called on-line cleaning refers to that milipore filter residing position when Chemical cleaning is identical with its residing position when the normal filtration; And so-called off-line cleans, refer to residing position when milipore filter is separated to its filtration, be placed on a kind of mode of cleaning in the membrance chemistry service sink of setting up specially.With off-line, clean and compare, on-line cleaning is with the obvious advantage: at film, clean link on the one hand and be connected this lengthy and jumbled process without the dismounting, lifting, installation and the pipeline that carry out film group again, greatly alleviated the staff's of water factory workload, the filtration working time of having improved milipore filter, be conducive to improve milipore filter aquifer yield; On the other hand, no longer need to arrange separately membrance chemistry service sink, reduced to a certain extent construction investment, and be conducive to keep film to process the clean and tidy and attractive in appearance of workshop, be difficult for film to cause secondary pollution, also avoided milipore filter group that expendable damage occurs when dismounting and lifting simultaneously.
At present, the city milipore filter water factory building is both at home and abroad more and more many, and scale is also more and more large, and is accelerated development trend.In these water factories, both useful container type milipore filters, also useful submerged ultrafiltration.And aspect Chemical cleaning, because container type milipore filter flux is relatively large, chemistry is washed short, frequent operation of cycle, and container type milipore filter sealing and globality are stronger, in addition, it is few that container type milipore filter membrane area is little, chemistry is washed dosage, so container type milipore filter adopts on-line cleaning mode more; And submerged ultrafiltration flux is relatively low, chemistry is washed especially restorative chemistry, and to wash the cycle longer, and it is many that membrane area is large, chemistry is washed dosage, in addition, immersed ultrafiltration membrane pond is generally established piping lane, for avoiding in piping lane all kinds of pipelines numerous and complicated mixed and disorderly, the submerged ultrafiltration in Practical Project adopts off-line cleaning way more at present.
Summary of the invention
First object of the present invention is to provide a kind of immersed ultrafiltration membrane pond, and all kinds of pipelines, valve in immersed ultrafiltration membrane pond piping lane are farthest simplified, and makes to be arranged in an orderly way and compactness in piping lane.
To achieve these goals, technical scheme of the present invention is as follows: a kind of immersed ultrafiltration membrane pond, piping lane in the middle of comprising, inlet channel, clear water canal and a plurality of single lattice membrane cisterna being connected with clear water canal with this inlet channel, described single lattice membrane cisterna is equipped with distributing channel, influent weir and membrane cisterna main body, the inlet gate that the distributing channel of described a plurality of single lattice membrane cisternas passes through separately is respectively connected with inlet channel, distributing channel is connected with membrane cisterna main body by influent weir, in membrane cisterna main body, be provided with many group membrane stacks, every group of membrane stack top is provided with collector pipe and aeration tube, the collector pipe that it is characterized in that every lattice membrane cisterna is connected with clear water canal by jellyfish pipe after a filter respectively, after described filter, between jellyfish pipe and clear water canal, be provided with Clean water valve and suction pump, aeration tube is responsible for gentle backwash control valve by aeration and is connected with gas backwashing system, after filter, jellyfish pipe is also washed cyclic switching valve by water backwashing switch valve and chemistry and is washed the circulatory system with water backwashing system and chemistry respectively and be connected.Wherein, be provided with the graticule mesh of interception activated carbon granule in the middle of inlet gate and distributing channel, influent weir is provided with adjustable for height stainless steel weir plate.Described suction pump adopts lobe pump, during forward, the jellyfish pipe after filter of water after the filter of membrane cisterna main body is pumped to clear water canal, water during reversion in clear water canal is filled in membrane cisterna main body as chemical wash liquid thinned water, membrane cisterna main body is also provided with waste liquid outlet near the side bottom of middle piping lane one side, described waste liquid outlet is washed circulating pump by chemistry and is washed the circulatory system with chemistry and be connected, described waste liquid outlet is provided with waste liquid and discharges control valve, described chemistry is washed circulating pump and is adopted lobe pump, during forward, the Chemical cleaning medicine in membrane cisterna main body is washed after filter jellyfish pipe and chemistry wash the circulatory system by waste liquid outlet to membrane cisterna bottom part body, reach circulating effect, during reversion, the Chemical cleaning waste liquid in membrane cisterna is discharged and washed the circulatory system through chemistry by waste liquid outlet, chemistry washes waste liquid emptying main valve and wastewater discharge pipe is discharged.After filter on jellyfish pipe, and wash and between cyclic switching valve, be provided with maintainability Chemical cleaning chemical feeding points at water backwashing switch valve and chemistry, circulating pump and chemistry are washed and between the circulatory system, are provided with restorative Chemical cleaning filling point.This immersed ultrafiltration membrane pond is provided with NaClO stoste chemical feed pipe, HCl stoste chemical feed pipe, NaOH stoste chemical feed pipe, maintainability Chemical cleaning chemical feeding points is provided with maintainability NaClO stoste fill valve, described NaClO stoste chemical feed pipe is connected with jellyfish pipe after filter by maintainability NaClO stoste fill valve, restorative Chemical cleaning filling point comprises restorative NaClO stoste fill valve, restorative HCl stoste fill valve and restorative NaOH stoste fill valve, described NaClO stoste chemical feed pipe, HCl stoste chemical feed pipe and NaOH stoste chemical feed pipe are respectively by restorative NaClO stoste fill valve, restorative HCl stoste fill valve is washed the circulatory system with restorative NaOH stoste fill valve with chemistry and is connected.
Second object of the present invention is to provide a kind of on-line maintenance chemical cleaning method of immersed ultrafiltration membrane pond, can realize the on-line maintenance of this immersed ultrafiltration membrane pond is cleaned.
To achieve these goals, technical scheme of the present invention is: a kind of on-line maintenance chemical cleaning method of immersed ultrafiltration membrane pond, it is characterized in that the method comprises: close inlet gate and Clean water valve, opening water discharge gate makes water level in membrane cisterna drop to preset water level, close emptying gate, open Clean water valve, utilize fresh water pouring in the suction pump counter steer membrane cisterna that this lattice membrane cisterna is corresponding, to water level in membrane cisterna, rise to the membrane cisterna normal filtration water level of setting, in this process, open maintainability NaClO stoste fill valve simultaneously, open maintainability NaClO dispenser pump and add maintainability NaClO stoste in jellyfish pipe after membrane cisterna filter, entering medicine reaches after Preset Time, close the suction pump of reversion, Clean water valve, maintainability NaClO stoste filling valve and maintainability NaClO dispenser pump, make membrane stack soak setting-up time in NaClO solution, open membrane cisterna bottom Chemical cleaning waste liquid and discharge control valve, circulating pump is opened in reversion, open waste liquid emptying main valve simultaneously, emptying integral lattice membrane cisterna maintainability is closed waste liquid discharge control valve after cleaning waste liquid, emptying main valve and circulating pump, again open Clean water valve, utilize suction pump to reverse in the mode that sees through film silk to fresh water pouring in membrane cisterna with clean and maintenance detergent line and film silk, continue to close suction pump and Clean water valve after setting-up time, opening water discharge gate, after emptying membrane cisterna, close emptying gate, open membrane cisterna inlet gate, enter normal air-water backwashing and filter process.
The 3rd object of the present invention is to provide a kind of alkali washing method of online restorative Chemical cleaning of immersed ultrafiltration membrane pond, can realize the online restorative alkali cleaning to this immersed ultrafiltration membrane pond.
To achieve these goals, technical scheme of the present invention is: a kind of alkali washing method of online restorative Chemical cleaning of immersed ultrafiltration membrane pond, it is characterized in that the method comprises: close inlet gate and Clean water valve, after opening water discharge gate emptying integral lattice membrane cisterna, close emptying gate, open membrane cisterna inlet gate, make water level in membrane cisterna rise to preset water level, close inlet gate, open chemistry and wash circulating switching valve, waste liquid is discharged control valve and circulating pump forward, open restorative NaOH stoste fill valve and restorative NaClO stoste fill valve simultaneously, restorative NaOH dispenser pump and restorative NaClO dispenser pump, simultaneously to chemistry, wash and in the circulatory system, add NaOH stoste and restorative NaClO stoste, entering medicine reaches after Preset Time, close restorative NaOH stoste fill valve and restorative NaClO stoste fill valve, restorative NaOH dispenser pump, restorative NaClO dispenser pump, after continuation maintenance pump operating cycle certain hour, close chemistry and wash circulating switching valve, waste liquid is discharged control valve and circulating pump, make membrane stack film silk soak special time in NaOH and NaClO mixed solution, open membrane cisterna bottom waste liquid and discharge control valve, membrane cisterna circulating pump is opened in reversion, open waste liquid emptying main valve simultaneously, after emptying integral lattice membrane cisterna alkali-washing waste liquid, close waste liquid and discharge control valve, waste liquid emptying main valve and circulating pump, open the waste liquid of membrane cisterna bottom and discharge control valve, Clean water valve, water backwashing transfer valve, and utilize suction pump reversion and circulating pump forward through waste liquid discharge control valve to fresh water pouring in membrane cisterna to clean the pipeline after alkali cleaning, after certain time, close Clean water valve, water backwashing transfer valve, the suction pump of reversion and the circulating pump of forward, keeping waste liquid to discharge control valve opens, and circulating pump is opened in reversion, open waste liquid emptying main valve simultaneously, again after emptying membrane cisterna, close waste liquid and discharge control valve, waste liquid emptying main valve and circulating pump.
The 4th object of the present invention is to provide a kind of acid washing method of online restorative Chemical cleaning of immersed ultrafiltration membrane pond, can realize the online restorative pickling to this immersed ultrafiltration membrane pond.
To achieve these goals, technical scheme of the present invention is: a kind of acid washing method of online restorative Chemical cleaning of immersed ultrafiltration membrane pond, it is characterized in that the method comprises: after alkali cleaning, keep Clean water valve and emptying gate to close, open membrane cisterna inlet gate, make water level in membrane cisterna rise to preset water level, close inlet gate, open chemistry and wash circulating switching valve, waste liquid is discharged control valve and circulating pump forward, open restorative HCl stoste fill valve and restorative HCl dispenser pump, in circulation line, add HCl stoste, entering medicine reaches after Preset Time, close restorative HCl stoste fill valve and restorative HCl dispenser pump, after continuation maintenance pump operating cycle certain hour, close chemistry and wash circulating switching valve, waste liquid is discharged control valve and circulating pump, make membrane stack film silk soak special time in HCl solution, open membrane cisterna bottom waste liquid and discharge control valve, membrane cisterna circulating pump is opened in reversion, open waste liquid emptying main valve simultaneously, after emptying integral lattice membrane cisterna pickle liquor, close waste liquid and discharge control valve, waste liquid emptying main valve and circulating pump.
The present invention is for simplifying as far as possible pipeline and valve system, chemistry is washed to circulation and discharge of wastewater system and membrane cisterna outlet system, water backwashing system, the line arrangement such as gas backwashing system consider, part pipeline and valve are realized and being shared, that is: clear water suction pump and membrane cisterna medicine after membrane cisterna filter of the prior art being washed to intake pump shares, the restorative Chemical cleaning circulating pump of membrane cisterna and membrane cisterna chemistry are washed to waste liquid emptying pump to be shared, membrane cisterna waste liquid is discharged to control valve and membrane cisterna chemistry, and to wash circulation liquid feed valve shared, by the female pipe of clear water and membrane cisterna backwash jellyfish pipe after membrane cisterna filter, membrane cisterna chemistry is washed and is recycled jellyfish pipe and share, membrane cisterna chemistry is washed to circulation house steward and membrane cisterna chemistry to be washed discharging of waste liquid house steward and shares.Therefore, the invention has the advantages that the pipeline and the valve that make in piping lane are simplified, make to be arranged in an orderly way and compactness in piping lane.
The 5th object of the present invention is to provide a kind of on-line maintenance of immersed ultrafiltration membrane pond, makes after the alkali cleaning of online restorative Chemical cleaning the NaClO composition in chemical wash liquid to obtain the method for online neutralization, can realize the harmless discharge to this immersed ultrafiltration membrane pond Chemical cleaning waste liquid.
To achieve these goals, technical scheme of the present invention is: after a kind of on-line maintenance of immersed ultrafiltration membrane pond, the alkali cleaning of online restorative Chemical cleaning, make the NaClO composition in chemical wash liquid obtain the online method neutralizing, it is characterized in that the method comprises: at emptying integral lattice membrane cisterna maintainability, clean in waste liquid process, open Na
2sO
3stoste filling valve and Na
2sO
3dispenser pump, cleans in waste liquid blow-down pipe and adds Na to membrane cisterna maintainability
2sO
3stoste with in and maintainability clean the NaClO in waste liquid, reach harmless without discharge; In the restorative alkali-washing waste liquid process of emptying integral lattice membrane cisterna, open Na
2sO
3stoste filling valve and Na
2sO
3dispenser pump adds Na in the restorative alkali-washing waste liquid blow-down pipe of membrane cisterna
2sO
3stoste, to neutralize the NaClO in restorative alkali-washing waste liquid, reaches harmless without discharge.
Accompanying drawing explanation
Fig. 1 is immersed ultrafiltration membrane pond partial plan layout of the present invention.
Fig. 2 is immersed ultrafiltration membrane pond profile of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing and example, the invention will be further described.
The parameter that the selected medicament kind of immersed ultrafiltration membrane pond Chemical cleaning, cleaning frequency, scavenging period etc. provide with the relevant ，Ke reference membrane of factor producers such as raw water quality, running environment, film device self-conditions, but finally need be determined by pilot scale research achievement.The present invention cleans and adopts clorox (NaClO) solution with maintainability, restorative cleaning is by the order of pickling after first alkali cleaning, pickling adopts hydrochloric acid (HCl) solution, alkali cleaning adopts NaOH (NaOH) solution and clorox (NaClO) solution, and uses sodium sulfite (Na in liquor natrii hypochloritis's discharge process
2sO
3) solution neutralization illustrates the process of immersed ultrafiltration membrane pond film on-line maintenance, restorative Chemical cleaning for example.
As shown in the figure, a kind of immersed ultrafiltration membrane pond, comprise water inlet portion, membrane cisterna main body, Overflow drainage part and middle piping lane etc., wherein water inlet portion is comprised of inlet channel 1, inlet gate 2, activated carbon granule interception graticule mesh 3, distributing channel 4 and influent weir 5, and Overflow drainage part is comprised of downflow weir 22, overflow canal 28, overflow pipe 26, drainage ditch 6 and drainpipe 27.Inlet channel 1 is connected by the inlet gate 2 of every lattice membrane cisterna and the distributing channel 4 of this membrane cisterna, is provided with the graticule mesh 3 of interception activated carbon granule in the middle of inlet gate 2 and distributing channel 4, prevents from, after activated carbon granule from entering membrane cisterna, film silk is caused to damage.Distributing channel 4 is connected with membrane cisterna main body by influent weir 5, influent weir 5 is provided with adjustable for height stainless steel weir plate to guarantee every lattice membrane cisterna water inlet evenly, in membrane cisterna, be provided with many group membrane stacks 8, it is characterized in that every group of membrane stack 8 tops are provided with collector pipe 10 and aeration tube 21, the many collector pipes 10 of single lattice membrane cisterna are connected with clear water canal 18 with Clean water valve 15 by the rear jellyfish pipe 11 of filter, clear water canal 18 is established 2 roads altogether, middle with concrete partition, separate, be unlikely to cause bed rearrangement membrane cisterna to be cut off the water when guaranteeing that wherein 1 lattice membrane cisterna Out of order.The many aeration tubes 21 of single lattice membrane cisterna are responsible for 20 gentle backwash control valves 37 by aeration and are connected with gas backwashing system 20.Inlet channel 1 is connected with the overflow canal 28 of Overflow drainage part by downflow weir 22, and finally by overflow pipe 26 discharge membrane cisternas, Overflow drainage drainage ditch 6 is partly connected with membrane cisterna main body by emptying gate 7, the drainage ditch 6 ends water pipe 27 that runs in.
In addition, after filter, between jellyfish pipe 11 and clear water canal 18, be provided with Clean water valve 15 and suction pump 17, chemistry is washed and is provided with chemistry between jellyfish pipe 11 after the circulatory system 13 and filter and washes cyclic switching valve 14, after water backwashing system 12 and filter, between jellyfish pipe 11, be provided with water backwashing switch valve 16, chemistry washes the circulation house steward 33 of the circulatory system and the house steward 34 of water backwashing system is located in the space between middle piping lane walkway board and clear water canal 18.Membrane cisterna main body is provided with emptying gate 7 away from the bottom, side of middle piping lane one side and is connected with the drainage ditch 6 of Overflow drainage part, membrane cisterna main body is also provided with waste liquid outlet 23 near the side bottom of middle piping lane one side, and described waste liquid outlet 23 is discharged by-pass valve control 24 and chemistry by waste liquid and washed circulating pump 19 and wash the circulatory system 13 with chemistry and be connected.Immersed ultrafiltration membrane pond adopts online Chemical cleaning, only need reach the object that membrane stack chemistry is washed by filtering the reasonable switching that rear jellyfish pipe 11, water backwashing system 12, chemistry wash between the circulatory system 13 and water-collecting system 25 4, and without membrane stack being hung to membrane cisterna, also without independently chemical washing basin is set.
After the filter of single lattice membrane cisterna on jellyfish pipe 11, and at water backwashing switch valve 16 and chemistry, wash and between cyclic switching valve 14, be provided with maintainability Chemical cleaning chemical feeding points, the circulating pump 19 of single lattice membrane cisterna and chemistry are washed and between the circulatory system 13, are provided with restorative Chemical cleaning filling point.
This immersed ultrafiltration membrane pond is also provided with NaClO stoste chemical feed pipe 29, HCl stoste chemical feed pipe 30, NaOH stoste chemical feed pipe 31, maintainability Chemical cleaning chemical feeding points is provided with maintainability NaClO stoste fill valve and dispenser pump, described NaClO stoste chemical feed pipe 29 is connected with jellyfish pipe 11 after filter by maintainability NaClO stoste fill valve, restorative Chemical cleaning filling point comprises restorative NaClO stoste fill valve and dispenser pump, restorative HCl stoste fill valve and dispenser pump and restorative NaOH stoste fill valve and dispenser pump, described NaClO stoste chemical feed pipe 29, HCl stoste chemical feed pipe 30 and NaOH stoste chemical feed pipe 31 are respectively by restorative NaClO stoste fill valve, restorative HCl stoste fill valve and restorative NaOH stoste fill valve and chemistry are washed chemistry after circulating pump 19 and are washed circulation pipe and be connected.
The circulation house steward 33 that described chemistry is washed the circulatory system is also connected by waste liquid emptying main valve 32 with wastewater discharge pipe 35, and wastewater discharge pipe 35 is provided with Na
2sO
3filling point 36, this Na
2sO
3filler pipe is provided with Na
2sO
3stoste filling valve.
Described various liquid fill valve, inlet gate 2, emptying gate 7 and purge valve 15, chemistry are washed circulating switching valve 14, gas backwash control valve 37, water backwashing transfer valve 16, waste liquid discharge control valve 24, waste liquid emptying main valve 32 etc. and are pneumatic (or electronic) type, all the other valves shown in figure are type hand, and for often opening.The present invention is by rationally switching on-line maintenance Chemical cleaning and the restorative Chemical cleaning that above-mentioned pneumatic (or electronic) gate and valve are realized immersed ultrafiltration membrane pond, and the relation between the processes such as the normal filtration of immersed ultrafiltration membrane pond, reverse cleaning and the online Chemical cleaning of film has been carried out to careful, careful consideration, simplify as far as possible pipeline and valve system, at utmost realize sharing of pipeline and switch valve.The control description of each course of work of immersed ultrafiltration membrane pond to valve, gate and other capital equipment, refers to below.
During immersed ultrafiltration membrane pond normal filtration, close emptying gate 7, open inlet gate 2, after the normal filtration water level that rises to setting until water level in membrane cisterna, open pumped vacuum systems 9 and make to form certain vacuum in film silk, now open suction pump 17 to setpoint frequency, and open Clean water valve 15, all the other pneumatic (or electronic) valves are all closed, and membrane cisterna starts normal filtration, when the backwash condition that normal filtration moves to setting reaches, closing membrane cisterna inlet gate 2 makes water level drop to preset height, close suction pump 17 and Clean water valve 15, open gas backwash control valve 37 rear startup air blasts, make milipore filter enter independent gas backwash state, last till after Preset Time, continue to keep air blast opening, in gas punching, open membrane cisterna backwash pump, open water backwash transfer valve 16 carries out water backwashing, gas, water associating backwash reaches after Preset Time, successively close water backwashing transfer valve 16, backwash pump, the gentle backwash control valve 37 of air blast, opening water discharge gate 7 afterwards, carry out backwashing wastewater discharge, be disposed to after preset water level, close membrane cisterna emptying gate 7, open inlet gate 2, again enter normal filtration process.In membrane cisterna backwash process, pneumatic (or electronic) valve, the gate in process, mentioned carry out switching manipulation as requested, and all the other pneumatic (or electronic) valves are all closed.
Milipore filter group normal filtration and air-water backwashing are until while reaching pre-conditioned that maintainability cleans, need carry out maintainability cleaning.Close inlet gate 2 and Clean water valve 15, opening water discharge gate 7 makes water level in membrane cisterna drop to preset water level, close emptying gate 7, open Clean water valve 15, utilize fresh water pouring in the suction pump 17 counter steer membrane cisternas that this lattice membrane cisterna is corresponding, to water level in membrane cisterna, rise to the membrane cisterna normal filtration water level of setting, open maintainability NaClO stoste fill valve simultaneously, open maintainability NaClO dispenser pump and add maintainability NaClO stoste in membrane cisterna backwash inlet pipeline, entering medicine reaches after Preset Time, the NaClO solution that makes whole membrane cisterna is in water inlet (clear water) and enter medicine (NaClO stoste) process and finish rear ultimate density and remain on setting value, close the suction pump 17 of reversion, Clean water valve 15, maintainability NaClO stoste filling valve and maintainability NaClO dispenser pump, make membrane stack soak special time in NaClO solution.After maintainability Chemical cleaning finishes, need wash waste liquid to chemistry rationally discharges, open membrane cisterna bottom Chemical cleaning waste liquid and discharge control valve 24, circulating pump 19 is opened in reversion, open waste liquid emptying main valve 32 simultaneously, emptying integral lattice membrane cisterna maintainability is closed waste liquid discharge control valve 24, emptying main valve 32 and circulating pump 19 after cleaning waste liquid, in this emptying process, opens Na
2sO
3stoste filling valve and Na
2sO
3dispenser pump reaches Preset Time, to membrane cisterna maintainability, cleans in waste liquid blow-down pipe 35 and adds Na
2sO
3stoste with in and maintainability clean the NaClO in waste liquid, close Na
2sO
3stoste filling valve and Na
2sO
3dispenser pump.For making maintainability chemistry in membrane cisterna, wash residual waste solution discharge completely, again open Clean water valve 15, utilize suction pump 17 to reverse in the mode that sees through film silk to fresh water pouring in membrane cisterna with clean and maintenance detergent line and film silk, continue to close suction pump 17 and Clean water valve 15 after special time, open membrane cisterna emptying gate 7, after emptying membrane cisterna, close emptying gate 7, open membrane cisterna inlet gate 2, enter normal filtration and backwash process.In membrane cisterna maintainability cleaning process, pneumatic (or electronic) valve, the gate in process, mentioned carry out switching manipulation as requested, and all the other pneumatic (or electronic) valves are all closed.
Milipore filter group normal filtration and air-water backwashing be after longer a period of time of operation, until while reaching restorative cleaning pre-conditioned, need carry out restorative cleaning.Close inlet gate 2 and Clean water valve 15, after opening water discharge gate 7 emptying integral lattice membrane cisternas, close emptying gate 7, open membrane cisterna inlet gate 2, make water level in membrane cisterna rise to preset water level, close inlet gate 2, open chemistry and wash circulating switching valve 14, waste liquid discharges control valve 24 and circulating pump 19(is now forward), open restorative NaOH stoste fill valve and restorative NaClO stoste fill valve simultaneously, (method to set up of described restorative NaOH dispenser pump and restorative NaClO dispenser pump is prior art for restorative NaOH dispenser pump and restorative NaClO dispenser pump, do not repeat them here), in circulation line, add NaOH stoste and restorative NaClO stoste simultaneously, entering medicine reaches after Preset Time, make the NaOH of whole membrane cisterna and NaClO mixed solution finish rear ultimate density and remain on setting value entering medicine (NaOH stoste and NaClO stoste) process, close restorative NaOH stoste fill valve and restorative NaClO stoste filling valve, restorative NaOH dispenser pump, restorative NaClO dispenser pump, after continuation maintenance water circulating pump 19 forwards operation certain hours, close chemistry and wash circulating switching valve 14, waste liquid is discharged control valve 24 and water circulating pump 19, make membrane stack film silk soak special time in NaOH and NaClO mixed solution, open membrane cisterna bottom waste liquid and discharge control valve 24, membrane cisterna circulating pump 19 is opened in reversion, open waste liquid emptying main valve 32 simultaneously, after emptying integral lattice membrane cisterna alkali-washing waste liquid, close waste liquid and discharge control valve 24, waste liquid emptying main valve 32 and circulating pump 19, in this process, open Na
2sO
3stoste fill valve and Na
2sO
3dispenser pump reaches Preset Time, in membrane cisterna alkali-washing waste liquid blow-down pipe 35, adds Na
2sO
3stoste with in and alkali-washing waste liquid in NaClO, close Na
2sO
3stoste fill valve and Na
2sO
3dispenser pump.For making restorative chemistry in membrane cisterna, wash residual waste solution discharge completely, open the waste liquid of membrane cisterna bottom and discharge control valve 24, Clean water valve 15, water backwashing transfer valve 16, and utilize suction pump 17 reversion and circulating pump 19 forwards from waste liquid discharge control valve 24 to fresh water pouring in membrane cisterna the pipeline with cleaning alkali cleaning, after certain time, close Clean water valve 15, water backwashing transfer valve 16, the suction pump 17 of reversion and the circulating pump 19 of forward, keeping waste liquid to discharge control valve 24 opens, and circulating pump 19 is opened in reversion, open waste liquid emptying main valve 32 simultaneously, again after emptying membrane cisterna, close waste liquid and discharge control valve 24, waste liquid emptying main valve 32 and circulating pump 19, alkali cleaning finishes.
After alkali cleaning, carry out pickling, acid cleaning process is similar with alkaline cleaning procedure, just need in pickle liquor emptying process, not add Na
2sO
3stoste.After alkali cleaning, keep Clean water valve 15 and emptying gate 7 to close, open membrane cisterna inlet gate 2, make water level in membrane cisterna rise to preset water level, close inlet gate 2, open chemistry and wash circulating switching valve 14, waste liquid discharges control valve 24 and circulating pump 19(is now forward), (method to set up of described restorative HCl dispenser pump is also prior art to open restorative HCl stoste fill valve and restorative HCl dispenser pump, do not repeat them here), in circulation line, add HCl stoste simultaneously, entering medicine reaches after Preset Time, the HCl solution that makes whole membrane cisterna ultimate density after entering medicine process and finishing remains on setting value, close restorative HCl stoste fill valve and restorative HCl dispenser pump, after continuation maintenance water circulating pump 19 operation certain hours, close chemistry and wash circulating switching valve 14, waste liquid is discharged control valve 24 and water circulating pump 19, make membrane stack film silk soak special time in HCl solution, open membrane cisterna bottom waste liquid and discharge control valve 24, circulating pump 19 is opened in reversion, open waste liquid emptying main valve 32 simultaneously, after emptying integral lattice membrane cisterna alkali-washing waste liquid, close waste liquid and discharge control valve 24, waste liquid emptying main valve 32 and circulating pump 19.After alkali cleaning and pickling complete, open membrane cisterna inlet gate, enter normal filtration and backwash process.In the restorative cleaning process of membrane cisterna, pneumatic (or electronic) valve, the gate in process, mentioned carry out switching manipulation as requested, and all the other pneumatic (or electronic) valves are all closed.
Visible, the method to set up to the online Chemical cleaning of immersed ultrafiltration membrane pond in the present invention, both can reach and smoothly milipore filter carried out that on-line maintenance cleans and the object of restorative cleaning, again the process such as a bit normal filtration that does not affect milipore filter and air-water backwashing.Simultaneously, the present invention washes intake pump (17) by clear water suction pump and membrane cisterna medicine after membrane cisterna filter and shares, the restorative Chemical cleaning circulating pump of membrane cisterna and membrane cisterna chemistry are washed to waste liquid emptying pump (19) to be shared, membrane cisterna waste liquid is discharged to control valve and membrane cisterna chemistry, and to wash circulation liquid feed valve (24) shared, by the female pipe of clear water after membrane cisterna filter and the female pipe of membrane cisterna water backwashing, membrane cisterna chemistry is washed and is recycled jellyfish pipe (11) and share, membrane cisterna chemistry is washed to circulation house steward and membrane cisterna chemistry to be washed discharging of waste liquid house steward (33 and 35) and shares, make all kinds of pipelines in immersed ultrafiltration membrane pond piping lane, valve is farthest simplified, and make to arrange in piping lane clean and tidy and compact, the integration with height.
Claims (10)
1. an immersed ultrafiltration membrane pond, piping lane in the middle of comprising, inlet channel, clear water canal and a plurality of single lattice membrane cisterna being connected with clear water canal with this inlet channel, described every lattice membrane cisterna is equipped with distributing channel, influent weir and membrane cisterna main body, the inlet gate that the distributing channel of described a plurality of single lattice membrane cisternas passes through separately is respectively connected with inlet channel, distributing channel is connected with membrane cisterna main body by influent weir, in membrane cisterna main body, be provided with many group membrane stacks, every group of membrane stack top is provided with collector pipe and aeration tube, the collector pipe that it is characterized in that every lattice membrane cisterna is connected with clear water canal by jellyfish pipe after a filter respectively, after described filter, between jellyfish pipe and clear water canal, be provided with Clean water valve and suction pump, aeration tube is responsible for gentle backwash control valve by aeration and is connected with gas backwashing system, after filter, jellyfish pipe is also washed cyclic switching valve by water backwashing switch valve and chemistry and is washed the circulatory system with water backwashing system and chemistry respectively and be connected.
2. immersed ultrafiltration membrane pond as claimed in claim 1, is characterized in that being provided with the graticule mesh of tackling activated carbon granule in the middle of inlet gate and distributing channel, and influent weir is provided with adjustable for height stainless steel weir plate.
3. immersed ultrafiltration membrane pond as claimed in claim 1, described suction pump adopts lobe pump, during forward, the jellyfish pipe after filter of water after the filter of membrane cisterna main body is pumped to clear water canal, water during reversion in clear water canal is filled in membrane cisterna main body as chemical wash liquid thinned water, membrane cisterna main body is also provided with waste liquid outlet near the side bottom of middle piping lane one side, described waste liquid outlet is washed circulating pump by chemistry and is washed the circulatory system with chemistry and be connected, described waste liquid outlet is provided with waste liquid and discharges control valve, described chemistry is washed circulating pump and is adopted lobe pump, during forward, the Chemical cleaning medicine in membrane cisterna main body is washed after filter jellyfish pipe and chemistry wash the circulatory system by waste liquid outlet to membrane cisterna bottom part body, reach circulating effect, during reversion, the Chemical cleaning waste liquid in membrane cisterna is discharged and washed the circulatory system through chemistry by waste liquid outlet, chemistry washes waste liquid emptying main valve and wastewater discharge pipe is discharged.
4. by a kind of immersed ultrafiltration membrane pond claimed in claim 1, it is characterized in that after filter on jellyfish pipe, and at water backwashing switch valve and chemistry, wash and between cyclic switching valve, be provided with maintainability Chemical cleaning chemical feeding points, circulating pump and chemistry are washed and between the circulatory system, are provided with restorative Chemical cleaning filling point.
5. by a kind of immersed ultrafiltration membrane pond claimed in claim 4, it is characterized in that this immersed ultrafiltration membrane pond is provided with NaClO stoste chemical feed pipe, HCl stoste chemical feed pipe, NaOH stoste chemical feed pipe, maintainability Chemical cleaning chemical feeding points is provided with maintainability NaClO stoste fill valve, described NaClO stoste chemical feed pipe is connected with jellyfish pipe after filter by maintainability NaClO stoste fill valve, restorative Chemical cleaning filling point comprises restorative NaClO stoste fill valve, restorative HCl stoste fill valve and restorative NaOH stoste fill valve, described NaClO stoste chemical feed pipe, HCl stoste chemical feed pipe and NaOH stoste chemical feed pipe are respectively by restorative NaClO stoste fill valve, restorative HCl stoste fill valve is washed the circulatory system with restorative NaOH stoste fill valve with chemistry and is connected.
6. the on-line maintenance chemical cleaning method of an immersed ultrafiltration membrane pond, it is characterized in that the method comprises: close inlet gate and Clean water valve, opening water discharge gate makes water level in membrane cisterna drop to preset water level, close emptying gate, open Clean water valve, utilize fresh water pouring in the suction pump counter steer membrane cisterna that this lattice membrane cisterna is corresponding, to water level in membrane cisterna, rise to the membrane cisterna normal filtration water level of setting, in this process, open maintainability NaClO stoste fill valve simultaneously, after filtering to membrane cisterna, in jellyfish pipe, add maintainability NaClO stoste, entering medicine reaches after Preset Time, close the suction pump of reversion, Clean water valve, maintainability NaClO stoste filling valve, make membrane stack soak setting-up time in NaClO solution, open membrane cisterna bottom Chemical cleaning waste liquid and discharge control valve, circulating pump is opened in reversion, open waste liquid emptying main valve simultaneously, emptying integral lattice membrane cisterna maintainability is closed waste liquid discharge control valve after cleaning waste liquid, emptying main valve and circulating pump, again open Clean water valve, utilize suction pump to reverse in the mode that sees through film silk to fresh water pouring in membrane cisterna with clean and maintenance detergent line and film silk, continue to close suction pump and Clean water valve after setting-up time, opening water discharge gate, after emptying membrane cisterna, close emptying gate, open membrane cisterna inlet gate, enter normal air-water backwashing and filter process.
7. on-line maintenance chemical cleaning method as claimed in claim 6, is characterized in that cleaning in waste liquid process at emptying integral lattice membrane cisterna maintainability, opens Na
2sO
3stoste filling valve, cleans in waste liquid blow-down pipe and adds Na to membrane cisterna maintainability
2sO
3stoste with in and maintainability clean the NaClO in waste liquid.
8. the alkali washing method of the online restorative Chemical cleaning of an immersed ultrafiltration membrane pond, it is characterized in that the method comprises: close inlet gate and Clean water valve, after opening water discharge gate emptying integral lattice membrane cisterna, close emptying gate, open membrane cisterna inlet gate, make water level in membrane cisterna rise to preset water level, close inlet gate, open chemistry and wash circulating switching valve, waste liquid is discharged control valve, open forward circulating pump, open restorative NaOH stoste fill valve and restorative NaClO stoste fill valve simultaneously, simultaneously to chemistry, wash and in the circulatory system, add NaOH stoste and restorative NaClO stoste, entering medicine reaches after Preset Time, close restorative NaOH stoste fill valve and restorative NaClO stoste fill valve, after continuation maintenance pump operating cycle certain hour, close chemistry and wash circulating switching valve, waste liquid is discharged control valve and circulating pump, make membrane stack film silk soak special time in NaOH and NaClO mixed solution, open membrane cisterna bottom waste liquid and discharge control valve, membrane cisterna circulating pump is opened in reversion, open waste liquid emptying main valve simultaneously, after emptying integral lattice membrane cisterna alkali-washing waste liquid, close waste liquid and discharge control valve, waste liquid emptying main valve and circulating pump, open the waste liquid of membrane cisterna bottom and discharge control valve, Clean water valve, water backwashing transfer valve, and utilize suction pump reversion and circulating pump forward through waste liquid discharge control valve to fresh water pouring in membrane cisterna to clean the pipeline after alkali cleaning, after certain time, close Clean water valve, water backwashing transfer valve, the suction pump of reversion and the circulating pump of forward, keeping waste liquid to discharge control valve opens, and circulating pump is opened in reversion, open waste liquid emptying main valve simultaneously, again after emptying membrane cisterna, close waste liquid and discharge control valve, waste liquid emptying main valve and circulating pump.
9. online restorative chemical cleaning method as claimed in claim 8, is characterized in that in the restorative cleaning waste liquid of emptying integral lattice membrane cisterna process, opens Na
2sO
3stoste filling valve adds Na in the restorative cleaning waste liquid of membrane cisterna blow-down pipe
2sO
3stoste is to neutralize the NaClO in restorative cleaning waste liquid.
10. the acid washing method of the online restorative Chemical cleaning of an immersed ultrafiltration membrane pond, it is characterized in that the method comprises: after alkali cleaning, keep Clean water valve and emptying gate to close, open membrane cisterna inlet gate, make water level in membrane cisterna rise to preset water level, close inlet gate, open chemistry and wash circulating switching valve, waste liquid is discharged control valve, open forward circulating pump, open restorative HCl stoste fill valve, in circulation line, add HCl stoste, entering medicine reaches after Preset Time, close restorative HCl stoste fill valve, after continuation maintenance pump operating cycle certain hour, close chemistry and wash circulating switching valve, waste liquid is discharged control valve and circulating pump, make membrane stack film silk soak special time in HCl solution, open membrane cisterna bottom waste liquid and discharge control valve, membrane cisterna circulating pump is opened in reversion, open waste liquid emptying main valve simultaneously, after emptying integral lattice membrane cisterna pickle liquor, close waste liquid and discharge control valve, waste liquid emptying main valve and circulating pump.
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| CN201210293086.2A CN103585888A (en) | 2012-08-17 | 2012-08-17 | Immersed-type ultrafiltration membrane pool and on-line chemical cleaning method thereof |
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| CN201210293086.2A CN103585888A (en) | 2012-08-17 | 2012-08-17 | Immersed-type ultrafiltration membrane pool and on-line chemical cleaning method thereof |
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| CN103990383A (en) * | 2014-03-20 | 2014-08-20 | 河海大学 | Chemical cleaning method of external pressure membrane system |
| CN104492265A (en) * | 2014-12-31 | 2015-04-08 | 天津大学 | Ultrafiltration membrane device with on-line medicament backwashing and blowdown device |
| CN106380041A (en) * | 2016-08-30 | 2017-02-08 | 上海世渊环保科技有限公司 | Detachable waste water processing facility and waste water processing technology |
| CN107349793A (en) * | 2017-07-12 | 2017-11-17 | 天津大学 | A kind of system and method that can carry out offline chemical cleaning to MBR film group devices online |
| CN110776091A (en) * | 2019-08-02 | 2020-02-11 | 同济大学 | Immersed MBR (membrane bioreactor) in-situ chemical cleaning method without impact influence on sludge activity |
| CN113101811A (en) * | 2021-05-27 | 2021-07-13 | 成都市排水有限责任公司 | Recovery cleaning method for MBR hollow fiber membrane |
| CN114699923A (en) * | 2022-05-06 | 2022-07-05 | 江苏道科环境科技有限公司 | Method for recycling chemical cleaning liquid medicine of immersed ultrafiltration membrane |
| CN115724491A (en) * | 2022-11-16 | 2023-03-03 | 上海市政工程设计研究总院（集团）有限公司 | Water treatment method of carbon-film integrated filter with central channel |
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| CN107349793A (en) * | 2017-07-12 | 2017-11-17 | 天津大学 | A kind of system and method that can carry out offline chemical cleaning to MBR film group devices online |
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| CN113101811B (en) * | 2021-05-27 | 2022-06-07 | 成都市排水有限责任公司 | Recovery cleaning method for MBR hollow fiber membrane |
| CN114699923A (en) * | 2022-05-06 | 2022-07-05 | 江苏道科环境科技有限公司 | Method for recycling chemical cleaning liquid medicine of immersed ultrafiltration membrane |
| CN114699923B (en) * | 2022-05-06 | 2024-06-07 | 江苏道科环境科技有限公司 | Method for recycling chemical cleaning liquid medicine of immersed ultrafiltration membrane |
| CN115724491A (en) * | 2022-11-16 | 2023-03-03 | 上海市政工程设计研究总院（集团）有限公司 | Water treatment method of carbon-film integrated filter with central channel |
| CN116199295A (en) * | 2022-11-16 | 2023-06-02 | 上海市政工程设计研究总院（集团）有限公司 | Water treatment method of carbon film integrated filter tank |
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