CN107321189A - A kind of outer cleaning device of MBR films line and cleaning method - Google Patents
A kind of outer cleaning device of MBR films line and cleaning method Download PDFInfo
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- CN107321189A CN107321189A CN201710761234.1A CN201710761234A CN107321189A CN 107321189 A CN107321189 A CN 107321189A CN 201710761234 A CN201710761234 A CN 201710761234A CN 107321189 A CN107321189 A CN 107321189A
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- pickling tube
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- 238000004140 cleaning Methods 0.000 title claims abstract description 170
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000003513 alkali Substances 0.000 claims abstract description 101
- 239000002699 waste material Substances 0.000 claims abstract description 92
- 238000005554 pickling Methods 0.000 claims abstract description 81
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 73
- 239000002351 wastewater Substances 0.000 claims abstract description 30
- 238000000746 purification Methods 0.000 claims abstract description 21
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 12
- 231100000719 pollutant Toxicity 0.000 claims abstract description 12
- 239000008213 purified water Substances 0.000 claims abstract description 9
- 238000010926 purge Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 46
- 239000012528 membrane Substances 0.000 claims description 30
- 239000002253 acid Substances 0.000 claims description 22
- 239000012530 fluid Substances 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 5
- 238000007654 immersion Methods 0.000 claims description 5
- 238000004065 wastewater treatment Methods 0.000 claims description 5
- 239000010802 sludge Substances 0.000 claims description 4
- 238000006386 neutralization reaction Methods 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims 1
- 230000009977 dual effect Effects 0.000 abstract description 4
- 239000010865 sewage Substances 0.000 abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 29
- 230000004907 flux Effects 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000003814 drug Substances 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000005273 aeration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 150000004965 peroxy acids Chemical class 0.000 description 1
- 235000021110 pickles Nutrition 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/162—Use of acids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/164—Use of bases
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses cleaning device and cleaning method outside a kind of MBR films line, belong to sewage treatment equipment technical field, to solve MBR with cleaning performance is not good outside film line the problem of.It includes purging system, aerating system and drainage system, purging system includes pickling tube, alkali cleaning pond and purification water pool, purification water pool is connected by purifying entrance of the water pipe respectively with pickling tube and alkali cleaning pond, aerating system includes low-pressure air device, low-pressure air device is connected with pickling tube and alkali cleaning pond respectively by air hose, drainage system includes waste drains pump and wastewater equalization pond, outlet of the entrance of waste drains pump by sewer pipe respectively with pickling tube and alkali cleaning pond is connected, and the outlet of waste drains pump is connected with wastewater equalization pond.The present invention is carried out after the dual cleaning of pickling and alkali cleaning with film to MBR, then is rinsed with purified water, it is ensured that the pollutant on film obtains fully erased, compared with on-line cleaning, and the pollutant on film is removed more totally, and the service life of film is improved.
Description
Technical field
The invention belongs to sewage treatment equipment technical field, more specifically to cleaning device outside a kind of MBR films line and
Cleaning method.
Background technology
Attention of the membrane separating process because of its efficient, simple, energy-conservation by people generally, has been widely used for chemical industry, doctor
The industrial technical fields such as medicine, food, electronics, they are used for water purifying, separation with recycling.Membrane bioreactor (MBR) skill
Art is the Novel sewage treatment technology for being combined membrane separation technique with biological treatment process.With traditional sewage treatment process phase
Have that floor space is small, excess sludge is few, effluent quality is high than, MBR techniques, denitrogenation dephosphorizing efficiency high, technological process are simple, fortune
The features such as row management facilitates.
The use of immersion MBR film devices is also more and more in cold rolling wastewater, and the use, maintenance to MBR films there has also been
Further demand.Although MBR is hydrophilic film with film, fouling membrane is inevitable, film one in membrane separating process
Denier is contaminated will to increase cross-film resistance, reduce membrane flux, influence performance and the life-span of film.Therefore, in daily operation pipe
During reason, Chemical cleaning periodically carried out to film, to remove the pollutant on membrane removal surface and inside, recover the water permeability of film.
Chemical cleaning includes cleaning two kinds of means outside on-line cleaning and line.On-line cleaning can go membrane removal surface and inner most to pollute
Thing, but the deep layer pollution inside part intractable pollutant and fenestra can not be removed effectively.So the effect of on-line cleaning
It is less desirable, often time length, even if adding cleaning frequency, membrane flux still declines quickly, and film changes fast, cost
It is high.Therefore need periodically to enter film outside line and clean.
Chinese utility model patent, publication number：CN202936241U, publication date：On 05 15th, 2013, disclose one kind
Can wash cycles MBR film group devices offline device, described device include circulation cleaning system, on-line monitoring system, medicine system,
Aerating system and heating system, medicine system include acid storage tank and storage alkali tank, and the device of the utility model is when film group device is offline
Medicine charging function, automatically wash cycles function, monitoring flow, liquid level and transmembrane pressure are mended with automatic, can be automatic by PLC controls
Judge cleaning performance and control scavenging period：Cleaning rate can be effectively improved, decoction consumption is reduced；It can improve what film was cleaned offline
Efficiency, is particularly suitable for use in winter low temperature or fouling membrane serious conditions.It is disadvantageous in that patent cleaning is by on-line cleaning
Move on to and carried out in the outer pond of line, its essence is cleaned with membrane filtration reverse direction flow, it is necessary to which supporting facility has clean cycle pond, cleaning
Circulating pump, chemicals dosing plant and on-line monitoring system etc., auxiliary facility is very complete, and cost of investment is high, and it is multiple to operate
It is miscellaneous.Simultaneously because it uses single service sink, a film group can only be cleaned every time, pickling, alkali cleaning, neutralization are a cleaning
In the cycle, for the cleaning of multimembrane group, then the time is very long, and otherwise will set up a huge system could meet multiple film groups simultaneously
The need for cleaning.On-line cleaning system is had been provided with substantially in currently designed system, and in terms of practical production experience, on-line cleaning is clear
Wash frequently, effect is unsatisfactory, half a year cleaning can be accomplished once substantially by being cleaned outside line, and effect is notable.
The content of the invention
1st, the problem of solving
For existing MBR films on-line cleaning effect it is not good the problem of, the present invention provides and cleans dress outside a kind of MBR films line
Put and cleaning method.It can efficiently be handled with film to MBR, the membrane flux of film is preferably recovered, and improve film
Service life.
2nd, technical scheme
To solve the above problems, the present invention is adopted the following technical scheme that.
A kind of outer cleaning device of MBR films line, including purging system, aerating system and drainage system, purging system include acid
Wash pool, alkali cleaning pond and purification water pool, purification water pool are connected by purifying entrance of the water pipe respectively with pickling tube and alkali cleaning pond, aeration
System includes low-pressure air device, and low-pressure air device is connected with pickling tube and alkali cleaning pond respectively by air hose, drainage system
Including waste drains pump and wastewater equalization pond, the outlet of the entrance of waste drains pump by sewer pipe respectively with pickling tube and alkali cleaning pond is connected,
The outlet of waste drains pump is connected with wastewater equalization pond.
Purging system is responsible for main cleaning, specifically includes pickling tube and alkali cleaning pond, acid can be carried out with film to MBR
Wash and alkali cleaning, after overpickling and the wheel stream process of alkali cleaning, the pollutant on MBR films can be all removed, and its membrane flux is obtained
Recover.Low-pressure air is passed through in the liquid that aerating system can be into pickling tube, the oxygen in air is forced to shift into liquid,
Increase the dissolved oxygen in liquid, improve pickling and alkali cleaning efficiency.Waste drains pump reacted in pickling tube and alkali cleaning pond will can give up
After waste water that liquid is emitted into wastewater equalization pond, wastewater equalization pond is adjusted, reach after wastewater discharge standard, you can arranged
Put, be conducive to environmental protection.
As a further improvement on the present invention, described air hose is provided with air valve one and air valve two, air valve one
In parallel with air valve two, air valve one is located at the entrance of pickling tube, and air valve two is located at the entrance in alkali cleaning pond.By adjusting air
Valve one and air valve two, it is possible to achieve be controlled to the air amount of being discharged into pickling tube and alkali cleaning pond, further increase this
The controllability of invention.
As a further improvement on the present invention, described purification water pipe is provided with water pipe valve one and water pipe valve two, water pipe valve
One and water pipe valve two it is in parallel, water pipe valve one is located at the entrance of pickling tube, and water pipe valve two is located at the entrance in alkali cleaning pond.By adjusting water
Pipe valve one and water pipe valve two, it is possible to achieve be controlled to the purified water amount of being discharged into pickling tube and alkali cleaning pond, are further improved
The controllability of the present invention.
As a further improvement on the present invention, described sewer pipe is provided with acid solution drain valve and alkali lye drain valve, acid solution
Drain valve and alkali lye drain valve are in parallel, and acid solution drain valve is located at the outlet of pickling tube, and alkali lye drain valve is located at the outlet in alkali cleaning pond.
By adjusting acid solution drain valve and alkali lye drain valve, it is possible to achieve the wastewater discharge in pickling tube and alkali cleaning pond is controlled
System, further increases the controllability of the present invention.
As a further improvement on the present invention, waste drains pump inlet valve is provided with the porch of waste drains pump, in going out for waste drains pump
Waste drains pump outlet valve is provided with mouthful, the entrance that waste drains pump inlet valve is located at waste drains pump is in parallel with acid solution drain valve and alkali lye drain valve
On pipeline between point, waste drains pump outlet valve is located in the outlet of waste drains pump and the pipeline of wastewater equalization pond.Waste drains pump inlet valve
The inflow and water yield of waste drains pump can be controlled with waste drains pump outlet valve, when waste drains pump is repaired, pass through control
Waste drains pump inlet valve and waste drains pump outlet valve processed, can facilitate the maintenance of waste drains pump, further increase the flexibility of the present invention.
As a further improvement on the present invention, waste liquid is provided with the pipeline between waste liquid pump discharge and waste drains pump outlet valve
Pump outlet check valve.Waste liquid pump outlet check valve can prevent waste liquid from being flowed back, it is to avoid waste drains pump reversion is to cause waste liquid to return
Stream, further increases the security of the present invention.
As a further improvement on the present invention, described low-pressure air device is low pressure blower.Low pressure blower has
The characteristics of small volume, air quantity are big, noise is low, smooth running, air quantity are stablized and are cheap, uses low pressure blower for aeration system
System provides low-pressure air, it is ensured that pickling tube and the middle liquid in alkali cleaning pond are to the stable Rapid Cleanings of MBR films, and cost
It is relatively low.
A kind of MBR cleaning methods outside film line, comprise the following steps：
The first step：Set up a kind of outer cleaning device of above-mentioned MBR films line；
Second step：The acid solution for pickling is added toward pickling tube, the aqueous slkali for alkali cleaning is added into alkali cleaning pond；
3rd step：MBR is hung out from membrane cisterna with film, is put into pickling tube and is soaked；
4th step：MBR is hung out from pickling tube with film again, is put into alkali cleaning pond and is soaked；
5th step：By waste drains pump and waste pipe, by the discharging of waste liquid in pickling tube and alkali cleaning pond to wastewater equalization pond,
In wastewater equalization pond, it will be discharged after wastewater treatment to discharge standard；
6th step：From purification water pool, purified water is discharged into alkali cleaning pond by purifying water pipe, MBR is carried out clearly with film
Water is rinsed, until MBR films surface is reached after neutrality, MBR is hung back in membrane cisterna with film, completes the cleaning to MBR films.
MBR is lifted with film and cleaned to outside line, after the dual cleaning through overpickling and alkali cleaning, then with purified water pair
It is rinsed, it is ensured that MBR obtains fully erased with the pollutant on film, compared with on-line cleaning, and the membrane flux of MBR films is extensive
Multiple is more preferable.The most laggard waste liquid for being used to clean is adjusted in waste liquid regulating reservoir, waste liquid is reached discharge standard, further
Improve the feature of environmental protection of the present invention.
As a further improvement on the present invention, in the 3rd step and the 4th step, in MBR with film immersion process, while with low
Pressure air assembly and air hose are passed through low-pressure air into pickling tube or alkali cleaning pond.Liquid into pickling tube and alkali cleaning pond is passed through
Low-pressure air, can further improve the oxygen content in liquid, further increase the efficiency of cleaning.
As a further improvement on the present invention, the gas flow in air hose is controlled by air valve one and air valve two
Fluid flow in system, purification water pipe is controlled by water pipe valve one and water pipe valve two, and the fluid flow in sewer pipe passes through
Acid solution drain valve and alkali lye drain valve are controlled.The above-mentioned valve by adjusting, can be to the gas and liquid flow in pipeline
Amount is controlled, to be preferably controlled to whole cleaning process, further increases the operability of the present invention.
3rd, beneficial effect
Compared to prior art, beneficial effects of the present invention are：
(1) the outer cleaning device of a kind of MBR films line of the invention, including pickling tube and alkali cleaning pond, can be carried out to MBR with film
Pickling and alkali cleaning, after overpickling and the wheel stream process of alkali cleaning, pollutant and sludge on MBR films can be all removed, its film
Flux is restored, and the service life of film is improved；
(2) it is passed through in the outer cleaning device of a kind of MBR films line of the invention, the liquid that aerating system can be into pickling tube low
Air is pressed, the oxygen in air is forced to shift into liquid, the dissolved oxygen in increase liquid improves pickling and alkali cleaning efficiency；
(3) the outer cleaning device of a kind of MBR films line of the invention, waste drains pump can will be reacted in pickling tube and alkali cleaning pond
Discharging of waste liquid after waste water in wastewater equalization pond is adjusted, is reached after wastewater discharge standard, you can arranged to wastewater equalization pond
Put, be conducive to environmental protection；
(4) a kind of outer cleaning device of MBR films line of the invention, the pipeline between waste liquid pump discharge and waste drains pump outlet valve
Waste liquid pump outlet check valve is provided with, waste liquid pump outlet check valve can prevent waste liquid from being flowed back, it is to avoid waste drains pump, which is inverted, is
Cause waste reflux, further increase the security of the present invention；
(5) the outer cleaning device of a kind of MBR films line of the invention, low-pressure air device is low pressure blower, low pressure blower
With small volume, air quantity is big, noise is low, smooth running, air quantity are stable and it is cheap the characteristics of, low pressure blower is used to expose
Gas system provides low-pressure air, it is ensured that pickling tube and the middle liquid in alkali cleaning pond to the stable Rapid Cleanings of MBR films, and
Cost is relatively low；
(6) a kind of MBR cleaning methods outside film line of the invention, MBR is lifted with film and cleaned to outside line, through peracid
Wash after the dual cleaning with alkali cleaning, then it is rinsed with purified water, it is ensured that MBR is obtained completely clear with the pollutant on film
Remove, compared with on-line cleaning, it is more preferable that the membrane fluxs of MBR films recovers, finally by for the waste liquid of cleaning in waste liquid regulating reservoir
In be adjusted, waste liquid is reached discharge standard, further increase the present invention the feature of environmental protection；
(7) a kind of MBR of the invention passes through air valve one and sky with the gas flow in cleaning method, air hose outside film line
Air valve two is controlled, and the fluid flow in purification water pipe is controlled by water pipe valve one and water pipe valve two, in sewer pipe
Fluid flow is controlled by acid solution drain valve and alkali lye drain valve, the above-mentioned valve by adjusting, can be in pipeline
Gas and fluid flow are controlled, to be preferably controlled to whole cleaning process, further increase the present invention's
Operability；
(8) a kind of outer cleaning device of MBR films line of the invention, compact conformation occupies little space, and cleaning efficiency is high, and prolongs
The service life of MBR films has been grown, cost is reduced.
Brief description of the drawings
Fig. 1 is cleaning device schematic diagram outside a kind of MBR films line of the present invention；
Fig. 2 is a kind of flat distribution map of the outer cleaning device of MBR films line of the present invention.
In figure：1st, pickling tube；2nd, alkali cleaning pond；3rd, low-pressure air device；4th, purification water pool；5th, air hose；6th, water pipe is purified；
7th, air pipe valve one；8th, water pipe valve one；9th, air pipe valve two；10th, water pipe valve two；11st, acid solution drain valve；12nd, alkali lye drain valve；
13rd, sewer pipe；14th, waste drains pump；15th, waste drains pump inlet valve；16th, waste liquid pump outlet check valve；17th, waste drains pump outlet valve；18th, give up
Water regulating reservoir.
Embodiment
The present invention is further described below with reference to specific embodiment.
Embodiment 1
As shown in figure 1, a kind of outer cleaning device of MBR films line, including purging system, aerating system and drainage system, cleaning
System include pickling tube 1, alkali cleaning pond 2 and purification water pool 4, purification water pool 4 by purify water pipe 6 respectively with pickling tube 1 and alkali cleaning
Pond 2 entrance connection, aerating system include low-pressure air device 3, low-pressure air device 3 by air hose 5 respectively with pickling tube 1
Connected with alkali cleaning pond 2, drainage system includes waste drains pump 14 and wastewater equalization pond 18, the entrance of waste drains pump 14 passes through 13 points of sewer pipe
Outlet not with pickling tube 1 and alkali cleaning pond 2 is connected, and the outlet of waste drains pump 14 is connected with wastewater equalization pond 18.
Purging system is responsible for main cleaning, specifically includes pickling tube 1 and alkali cleaning pond 2, and MBR can be carried out with film
Pickling and alkali cleaning, after overpickling and the wheel stream process of alkali cleaning, the pollutant on MBR films can be all removed, and its membrane flux is obtained
To recovery.Aerating system can be passed through low-pressure air into the liquid in pickling tube 1, and the oxygen in air is forced to liquid transfer
Move, the dissolved oxygen in increase liquid improves pickling and alkali cleaning efficiency.Waste drains pump 14 will can react in pickling tube 1 and alkali cleaning pond 2
Discharging of waste liquid afterwards is to wastewater equalization pond 18, and the waste water in wastewater equalization pond 18 is handled into Waste Water Treatment.
Embodiment 2
A kind of outer cleaning device of MBR films line of the present embodiment, similar to Example 1, difference is, described air
Pipe 5 is provided with air valve 1 and air valve 29, and air valve 1 is located at the entrance of pickling tube 1, and air valve 29 is located at alkali cleaning pond 2
Entrance.By adjusting air valve 1 and air valve 29, it is possible to achieve to the air amount of being discharged into pickling tube 1 and alkali cleaning pond 2
It is controlled, further increases the controllability of the present embodiment.
Described purification water pipe 6 is provided with water pipe valve 1 and water pipe valve 2 10, and water pipe valve 1 is located at entering for pickling tube 1
Mouthful, water pipe valve 2 10 is located at the entrance in alkali cleaning pond 2.By adjusting water pipe valve 1 and water pipe valve 2 10, it is possible to achieve to pickling tube
It is controlled with the purified water amount of being discharged into 1 alkali cleaning pond 2, further increases the controllability of the present embodiment.
13 are provided with acid solution drain valve 11 and alkali lye drain valve 12, acid solution drain valve 11 and alkali lye discharge on described sewer pipe
Valve 12 is in parallel, and acid solution drain valve 11 is located at the outlet of pickling tube 1, and alkali lye drain valve 12 is located at the outlet in alkali cleaning pond 2.Pass through regulation
Acid solution drain valve 11 and alkali lye drain valve 12, it is possible to achieve be controlled to the wastewater discharge in pickling tube 1 and alkali cleaning pond 2,
Further increase the controllability of the present embodiment.
Embodiment 3
A kind of outer cleaning device of MBR films line of the present embodiment, similar to Example 2, difference is, in waste drains pump 14
Porch be provided with waste drains pump inlet valve 15, the exit of waste drains pump 14 be provided with waste drains pump outlet valve 17, waste drains pump outlet valve
17 are located in the outlet of waste drains pump 14 and the pipeline of wastewater equalization pond 18.Waste drains pump inlet valve 15 and waste drains pump outlet valve 17 can be with
The inflow and water yield of waste drains pump 14 are controlled, when waste drains pump 14 is repaired, by controlling waste drains pump inlet valve
15 and waste drains pump outlet valve 17, the maintenance of waste drains pump 14 can be facilitated, the operation of the fault impact the present embodiment of waste drains pump 14 is prevented,
Further increase the flexibility of the present embodiment.
Exported in waste drains pump 14 and be provided with waste liquid pump outlet check valve 16 on the pipeline between waste drains pump outlet valve 17.Waste liquid
Pump outlet check valve 16 can prevent waste liquid from being flowed back, it is to avoid the reversion of waste drains pump 14 causes waste reflux, further increases
The security of the present embodiment.
Embodiment 4
A kind of outer cleaning device of MBR films line of the present embodiment, similar to Example 3, difference is, described low pressure
Air assembly 3 is low pressure blower.Low pressure blower has that small volume, air quantity are big, noise is low, smooth running, air quantity are stable and
Cheap the characteristics of, low pressure blower is used to provide low-pressure air for aerating system, it is ensured that pickling tube 1 and alkali cleaning pond 2
Middle liquid to the stable Rapid Cleanings of MBR films, and cost is relatively low.
Embodiment 5
A kind of MBR cleaning methods outside film line, comprise the following steps：
The first step：Set up a kind of outer cleaning device of above-mentioned MBR films line；
Second step：The acid solution for pickling is added toward pickling tube 1, the aqueous slkali for alkali cleaning is added into alkali cleaning pond 2；
Pickle is liquor natrii hypochloritis (effective chlorine density 3000mg/L), and alkali wash water is sodium hydroxide solution (concentration 1%), by tank car
Filling is untill it can submerge MBR film groups；
3rd step：MBR is hung out from membrane cisterna with film, surface sludge is cleaned, is put into pickling tube 1 and is soaked
Bubble, soak time about 1 day, the purpose of pickling is to remove the pollutant on film；
4th step：MBR is hung out with film from pickling tube 1 again, is put into alkali cleaning pond 2 and is soaked；
5th step：By waste drains pump 14 and waste pipe 13, the discharging of waste liquid in pickling tube 1 and alkali cleaning pond 2 to waste water is adjusted
Pond 18 is saved, in wastewater equalization pond 18, will be discharged after wastewater treatment to discharge standard；
6th step：From purification water pool 4, purified water is discharged into alkali cleaning pond 2 by purifying water pipe 6, MBR is carried out with film
Clear water is rinsed, until MBR films surface is reached after neutrality, MBR is hung back in membrane cisterna with film, completes the cleaning to MBR films.
MBR is lifted with film and cleaned to outside line, after the dual cleaning through overpickling and alkali cleaning, then with purified water pair
It is rinsed, it is ensured that MBR obtains fully erased with the pollutant on film, compared with on-line cleaning, and the membrane flux of MBR films is extensive
Multiple is more preferable.The most laggard waste liquid for being used to clean is handled in waste liquid regulating reservoir 18 into Waste Water Treatment.
Pickling tube 1 and alkali cleaning pond 2 can work simultaneously, after hanging out membrane module in pickling tube 1 and being put into alkali cleaning pond 2, can be with
Another batch of (every batch of membrane module includes 2-3 groups membrane module) membrane module is lifted and cleaned into pickling tube 1, pickling tube 1 and alkali cleaning
The access times of the cleaning fluid (i.e. acid solution and aqueous slkali) in pond 2 will be depending on the pollution level of membrane module, and current inventor does
The engineering experience 2-3 groups crossed have no problem, and the time that liquid is replaced and cleaned in fact is not long, and the time of film group immersion is very long.
Embodiment 6
A kind of MBR of the present embodiment cleaning methods outside film line, similar to Example 5, difference is, the 3rd step and
In 4th step, in MBR with film immersion process, while with low-pressure air device 3 and air hose into pickling tube 1 or alkali cleaning pond 2
It is passed through low-pressure air.Liquid into pickling tube and 1 alkali cleaning pond 2 is passed through low-pressure air, can further improve containing in liquid
Oxygen amount, further increases the cleaning efficiency of the present embodiment.
Embodiment 7
A kind of MBR of the present embodiment cleaning methods outside film line, similar to Example 6, difference is, in air hose
Gas flow be controlled by air valve 1 and air valve 29, purification water pipe 6 in fluid flow pass through water pipe valve 1
It is controlled with water pipe valve 2 10, the fluid flow in sewer pipe 13 is controlled by acid solution drain valve 11 and alkali lye drain valve 12
System.The above-mentioned valve by adjusting, can be controlled to the gas and fluid flow in pipeline, so as to preferably to whole clear
Washed journey is controlled, and further increases the operability of the present embodiment.
Schematical above that the present invention and embodiments thereof are described, the description does not have restricted, institute in accompanying drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited thereto.So, if the common skill of this area
Art personnel are enlightened by it, without departing from the spirit of the invention, are designed and the technical scheme without creative
Similar frame mode and embodiment, all should belong to protection scope of the present invention.
Claims (10)
1. a kind of outer cleaning device of MBR films line, including purging system, aerating system and drainage system, it is characterised in that：Cleaning system
System includes pickling tube (1), alkali cleaning pond (2) and purification water pool (4), purification water pool (4) respectively with pickling tube (1) and alkali cleaning pond (2)
Connection, aerating system includes low-pressure air device (3), and low-pressure air device (3) connects with pickling tube (1) and alkali cleaning pond (2) respectively
Logical, drainage system includes wastewater equalization pond (18), and wastewater equalization pond (18) is connected with pickling tube (1) and alkali cleaning pond (2) respectively.
2. a kind of outer cleaning device of MBR films line according to claim 1, it is characterised in that：Low-pressure air device (3) passes through
Air hose (5) is connected with pickling tube (1) and alkali cleaning pond (2) respectively, and air hose (5) is divided into two branch roads, one of branch road
Air valve one (7) is provided with, is connected with pickling tube (1), another branch road is provided with air valve two (9), with alkali cleaning pond (2) even
It is logical.
3. a kind of outer cleaning device of MBR films line according to claim 1, it is characterised in that：Purification water pool (4) passes through purification
Water pipe (6) is connected with pickling tube (1) and alkali cleaning pond (2) respectively, and purification water pipe (6) is divided into two branch roads, one of branch road
Water pipe valve one (8) is provided with, is connected with pickling tube (1), another branch road is provided with water pipe valve two (10), with alkali cleaning pond (2) even
It is logical.
4. a kind of outer cleaning device of MBR films line according to claim 1, it is characterised in that：Wastewater equalization pond (18) passes through
Waste pipe (13) is connected with pickling tube (1) and alkali cleaning pond (2) respectively, and waste pipe (13) is divided into two branch roads, one of branch
Road is provided with acid solution drain valve (11), is connected with pickling tube (1) bottom, and another branch road is provided with alkali lye drain valve (12), with
Alkali cleaning pond (2) bottom is connected.
5. a kind of outer cleaning device of MBR films line according to claim 4, it is characterised in that：Two branch of waste pipe (13)
On the pipeline that road merges, waste drains pump inlet valve (15), waste drains pump are sequentially provided with the direction for leading to wastewater equalization pond (18)
(14), waste liquid pump outlet check valve (16) and waste drains pump outlet valve (17).
6. a kind of outer cleaning device of MBR films line according to claim 3, it is characterised in that：Purify water pipe (6) one of them
Branch road at the top of pickling tube (1) with connecting, another branch road, with being connected at the top of alkali cleaning pond (2).
7. a kind of outer cleaning device of MBR films line according to claim 6, it is characterised in that：Described low-pressure air device
(3) it is low pressure blower.
8. a kind of MBR cleaning methods outside film line, comprise the following steps：
The first step：Set up the outer cleaning device of a kind of MBR films line described in claim any one of 1-7；
Second step：The acid solution for pickling is added toward pickling tube (1), the aqueous slkali for alkali cleaning is added into alkali cleaning pond (2)；
3rd step：MBR is hung out from membrane cisterna with film, surface sludge is cleaned, is put into pickling tube (1) and is soaked,
Soak time is 1 day, and the purpose of pickling is to remove the pollutant on film；
4th step：MBR is hung out with film from pickling tube (1) again, is put into alkali cleaning pond (2) and is soaked, soak time is 1
My god, the purpose of alkali cleaning, which is mainly, to clear the pollution off and neutralization；
5th step：Treat that membrane module is cleaned in alkali cleaning pond to finish, then membrane module is lifted into back original MBR membrane cisternas；
6th step：By waste drains pump (14) and waste pipe (13), by the discharging of waste liquid in pickling tube (1) and alkali cleaning pond (2) to useless
Water regulating reservoir (18), into Waste Water Treatment processing；
7th step：From purification water pool (4), purified water is added in pickling tube (1) and alkali cleaning pond (2) by purifying water pipe (6),
Its effect is：Can be with the concentration of solvent in regulating reservoir, and rinsing membrane module and service sink.
9. a kind of MBR according to claim 8 cleaning methods outside film line, it is characterised in that：In 3rd step and the 4th step,
In MBR with film immersion process, low-pressure air device (3) is passed through by air hose (5) into pickling tube (1) or alkali cleaning pond (2)
Low-pressure air.
10. a kind of cleaning methods outside film line of MBR according to claim 8 or claim 9, it is characterised in that：In air hose (5)
Gas flow is controlled by air valve one (7) and air valve two (9), and the fluid flow in purification water pipe (6) passes through water pipe
Valve one (8) and water pipe valve two (10) are controlled, and the fluid flow in sewer pipe (13) passes through acid solution drain valve (11) and alkali lye
Drain valve (12) is controlled.
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