CN106552513A - The cleaning method of filter membrane - Google Patents
The cleaning method of filter membrane Download PDFInfo
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- CN106552513A CN106552513A CN201510641871.6A CN201510641871A CN106552513A CN 106552513 A CN106552513 A CN 106552513A CN 201510641871 A CN201510641871 A CN 201510641871A CN 106552513 A CN106552513 A CN 106552513A
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Abstract
The invention discloses a kind of method for filtering Membrane cleaning, including step：S1, one reverse water pump of offer, carry out backwash to filter membrane；S2, the chlorine water by cl concn for 5mg/L～15mg/L are rinsed to filter membrane；S3, the filter membrane after flushing is taken out and drained, be positioned in the drying baker that temperature is 120 degree and be dried；S4, filter membrane is positioned in crucible furnace, with 500 degree of temperature heating 2-3 minutes；S5, filter membrane is blowed and sprayed using air gun；S6, by filter membrane be positioned in sodium hydroxide solution soak 24 hours；S7, taking-up filter membrane, are soaked 1 hour with being positioned over after clean water in the sodium hypochlorite that concentration is 1.5%；S8, filter membrane is cleaned with saline after be placed in drying baker be dried 1 hour；S9, filter membrane is placed in non oxidizing bactericide solution and is soaked；S10, taking-up filter membrane are placed in being dried 3 hours in the drying baker that temperature is 120 degree.
Description
Technical field
The present invention relates to the field of Membrane cleaning, more particularly to a kind of cleaning method of filter membrane.
Background technology
Filter membrane occurs the phenomenon of fouling membrane after operation a period of time, after there is fouling membrane, typically
Individually by the way of Chemical cleaning eliminating fouling membrane.But general acid using high concentration during Chemical cleaning,
Alkali or oxidant are soaked to film or wash cycles.As the chemical concentration for adopting is higher, meeting can not
Film is caused damage with avoiding so as to shorten film service life, hinder the application of membrane technology.Therefore, film is dirty
Dye control is vital problem during membrane technology popularization and application.In another kind of cleaning method, typically
Only it is the mode for being employed alone in after film runs a period of time carrying out backwash again.The backwash of film is typically adopted
Membranous system water outlet carries out backwash.Using the method, the material that fouling membrane is caused in removing part is only capable of, such as
Grain thing etc..But complex of Organic substance, metal and Organic substance etc. causes the material of fouling membrane to be difficult in backwash
When thoroughly remove, therefore the more serious fouling membrane that can still cause.And during actual production run also
It was found that：In the membranous system of constant flow operation, transmembrane pressure can be gradually increasing with the prolongation of run time；
And in the membranous system of constant pressure operation, film is by being gradually reduced with the prolongation of run time.It is this
Phenomenon directly shows to be difficult to reach the requirement of control fouling membrane using existing backwash mode.
The content of the invention
The purpose of the embodiment of the present invention is to provide a kind of cleaning method of filter membrane, can be prevented effectively from using highly concentrated
Degree infringement of the chemical agent to film, is avoided that physics rinses caused pollutant residual again, right so as to take into account
The cleaning of filter membrane and maintenance problem.
Embodiments provide a kind of cleaning method of filter membrane, including step：
S1, provide a reverse water pump, open the reverse water pump and simultaneously close service valve, make water (flow) direction with
The water (flow) direction of the service valve is opened conversely, 30 minutes are rinsed to filter membrane；
S2, the chlorine water by cl concn for 5mg/L～15mg/L are positioned in the water of the reverse water pump supply,
The flushing of 5-10 minutes is carried out to the filter membrane；
S3, by flushing after the filter membrane take out and drain, be positioned in the drying baker that temperature is 120 degree
It is dried 3 hours；
S4, the filter membrane is positioned in crucible furnace, with 500 degree of temperature heating 2-3 minutes；
S5, the filter membrane is blowed and sprayed using air gun, by the dust or degradation product on the filter membrane from described
Separate in filter membrane；
S6, by the filter membrane be positioned in sodium hydroxide solution soak 24 hours, the sodium hydroxide PH
Maintain 12；
S7, the filter membrane is taken out, with being positioned over after clean water in the liquor natrii hypochloritises that concentration is 1.5%
Immersion 1 hour；
S8, the filter membrane is cleaned with saline, and by cleaning after the filter membrane be placed in temperature and be
It is dried 1 hour in 45 degree of drying baker；
S9, the filter membrane is placed in volume be 50L non oxidizing bactericide solution in soaked；
S10, the taking-up filter membrane are placed in being dried 3 hours in the drying baker that temperature is 120 degree, so as to complete
Into the cleaning of the filter membrane.
Used as the improvement of such scheme, the pump power is 0.75kw, and bore is 50mm, and flow velocity is
2.5m/s。
Used as the improvement of such scheme, the flow of the water (flow) direction of the reverse water pump is the service valve
5 times of water (flow) direction flow.
Used as the improvement of such scheme, the chlorine water is liquor natrii hypochloritises or liquid chlorine.
Compared with prior art, the cleaning method of filter membrane disclosed by the invention, solves exclusive use chemistry
Medicament can clean filter membrane but filter membrane can be caused damage, and physics is used alone and rinses without compromising on filter membrane
But the problem that both filter membranes can not be taken into account cannot be totally cleaned, accomplishes not only to have maintained filter membrane but also clean cleaning
Beneficial effect.On the one hand the medicament pollution of chemistry can be reduced, on the other hand, it is also possible to targetedly
For drainage screen is cleaned, so as to, make cleaning method more effectively, and reduces cost.
Description of the drawings
Fig. 1 is a kind of schematic flow sheet of the cleaning method of the filter membrane in the embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of the invention, rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
Property work under the premise of the every other embodiment that obtained, belong to the scope of protection of the invention.
Referring to Fig. 1, it is a kind of schematic flow sheet of the cleaning method of filter membrane provided in an embodiment of the present invention.Such as
Shown in Fig. 1, the method comprising the steps of：
S101, one reverse water pump of offer, open the reverse water pump and simultaneously close service valve, make described reverse
The water (flow) direction of the water (flow) direction of water pump and the service valve is conversely, carry out backwash 30 minutes to filter membrane.
Specifically, the reverse pump power is 0.75kw, and bore is 50mm, and flow velocity is 2.5m/s；Implement
When, service valve is closed, the reverse water pump is opened, and current direction is made conversely, rinsing 30 minutes to filter membrane.
S102, it is invested in the pipeline of backwashing water using effective chlorine, the cl concn of backwashing water is
5mg/L～15mg/L, flow velocity are 5 times of forward filter flow, carry out backwash 5-10 minutes.
Preferably, the effective chlorine of input is liquor natrii hypochloritises or liquid chlorine.
The present embodiment uses the back-flushing method that fouling membrane is controlled suitable for external-compression type, super for external-compression type
For filter membrane, as the cl concn adopted during backwash is relatively low, after backwash, membrane cisterna mixed liquor cl concn is lower, because
This need not empty backwashing wastewater at the end of chlorinated water backwash process, and in this water, the content of chlorine is completely etc.
The chlorine content of tap water is same as, row is only needed when pollutant (referring mainly to turbidity) reach limit value in membrane cisterna
It is empty.
S103, filter membrane is drained at normal temperatures, 3 are dried in being put in 120 degrees Celsius of drying baker little
When, make to adhere to the chlorine volatilization of the filter membrane, reduce chemical damage of the chlorine to the filter membrane.
S104, filter membrane is placed in 500 degrees Celsius of crucible furnace and is heated 2-3 minutes, using high temperature to antibacterial
Pyrolytic is carried out Deng Organic substance.
S105, high wind speed injection is carried out with air gun to filter membrane so that the residue and dust and institute after decomposition
State filter membrane disengaging.
S106, filter membrane is positioned in the sodium hydroxide solution that pH value is 12 and is soaked 24 hours, in this phase
Between per every other hour check a pH value, be adjusted in time so as to which pH value maintains 12, using highly basic
Further decompose the acidic materials in the filter membrane.
S107, taking-up filter membrane, with clean water, make the alkaline solution in the removal filter membrane, clean
Soaked one hour with the sodium hypochlorite that concentration is 1.5% again afterwards, further to remove the alkalescence in the filter membrane
Material.
S108, cleaned with saline, in making the Sodium Chloride in saline and the sodium hypochlorite that remains in filter membrane,
After wash clean, it is put within drying baker and is dried 1 hour.
S109,50 liters of non oxidizing bactericides of addition, soak to filter membrane, are further sterilized.
Heating 3 hours in 120 degrees Celsius of drying baker are positioned over after S110, taking-up, complete to filter Membrane cleaning
Process.
After the backwash step of step S101～S102, screen plate is entered by step S103～S110
The process of one step, attachment that can targetedly to film surface are cleaned, particularly in backwash
Part without complete place to go is cleaned.
In sum, a kind of cleaning method of filter membrane disclosed by the invention, solves exclusive use chemical drugs
Agent can be cleaned filter membrane but filter membrane can be caused damage, be used alone physics rinse without compromising on filter membrane but
The problem that both filter membranes can not be taken into account cannot be totally cleaned, accomplishes what is filter membrane not only maintained but also has totally been cleaned
Beneficial effect.On the one hand the medicament pollution of chemistry can be reduced, on the other hand, it is also possible to targetedly right
Cleaned in drainage screen, so that cleaning method is more effectively, and reduces cost.By implementing the present invention
Filter membrane cleaning method to pollute drainage screen clean after, follow can the drainage screen of pollution
Ring is recycled.
The above is the preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, this
A little improvements and modifications are also considered as protection scope of the present invention.
Claims (4)
1. a kind of cleaning method of filter membrane, it is characterised in that including step：
S1, one reverse water pump of offer, open the reverse water pump and simultaneously close service valve, make the reverse water
The water (flow) direction of the water (flow) direction of pump and the service valve is conversely, carry out backwash 30 minutes to filter membrane；
S2, the recoil that the chlorine water that cl concn is 5mg/L～15mg/L is carried out 5～10 minutes to the filter membrane
Wash；
S3, by flushing after the filter membrane take out and drain, be positioned in the drying baker that temperature is 120 degree
It is dried 3 hours；
S4, the dried filter membrane is positioned in crucible furnace, 2～3 points are heated with 500 degree of temperature
Clock；
S5, the filter membrane is blowed and sprayed using air gun, by the dust or degradation product on the filter membrane from described
Separate in filter membrane；
S6, the filter membrane is positioned in sodium hydroxide solution and is soaked 24 hours, and make the sodium hydroxide
Solution concentration keeps PH=12；
S7, the filter membrane is taken out, with being positioned over after clean water in the liquor natrii hypochloritises that concentration is 1.5%
Immersion 1 hour；
S8, the filter membrane is cleaned with saline, and by cleaning after the filter membrane be placed in temperature and be
It is dried 1 hour in 45 degree of drying baker；
S9, the filter membrane is placed in volume be 50L non oxidizing bactericide solution in soaked；
S10, the taking-up filter membrane are placed in being dried 3 hours in the drying baker that temperature is 120 degree, so as to complete
Into the cleaning of the filter membrane.
2. the cleaning method of filter membrane as claimed in claim 1, it is characterised in that：The reverse water pump work(
Rate is 0.75kw, and bore is 50mm, and flow velocity is 2.5m/s.
3. the cleaning method of filter membrane as claimed in claim 1, it is characterised in that：The reverse water pump
The flow of water (flow) direction is 5 times of the water (flow) direction flow of the service valve.
4. the cleaning method of filter membrane as claimed in claim 1, it is characterised in that：The chlorine water is time chlorine
Acid sodium solution or liquid chlorine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510641871.6A CN106552513B (en) | 2015-09-29 | 2015-09-29 | Method for cleaning filtration membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510641871.6A CN106552513B (en) | 2015-09-29 | 2015-09-29 | Method for cleaning filtration membrane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106552513A true CN106552513A (en) | 2017-04-05 |
| CN106552513B CN106552513B (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510641871.6A Active CN106552513B (en) | 2015-09-29 | 2015-09-29 | Method for cleaning filtration membrane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111565825A (en) * | 2018-03-05 | 2020-08-21 | 栗田工业株式会社 | Method for cleaning membrane separation device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201776088U (en) * | 2010-09-03 | 2011-03-30 | 云南昆船第二机械有限公司 | Flat membrane cleaning system |
| CN202606042U (en) * | 2012-03-23 | 2012-12-19 | 苏州市新能膜材料科技有限公司 | Membrane cleaning device |
| CN103638819A (en) * | 2013-12-19 | 2014-03-19 | 北京林业大学 | Method for cleaning external tubular membrane for deeply treating waste incineration leachate |
-
2015
- 2015-09-29 CN CN201510641871.6A patent/CN106552513B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201776088U (en) * | 2010-09-03 | 2011-03-30 | 云南昆船第二机械有限公司 | Flat membrane cleaning system |
| CN202606042U (en) * | 2012-03-23 | 2012-12-19 | 苏州市新能膜材料科技有限公司 | Membrane cleaning device |
| CN103638819A (en) * | 2013-12-19 | 2014-03-19 | 北京林业大学 | Method for cleaning external tubular membrane for deeply treating waste incineration leachate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111565825A (en) * | 2018-03-05 | 2020-08-21 | 栗田工业株式会社 | Method for cleaning membrane separation device |
| CN111565825B (en) * | 2018-03-05 | 2021-09-10 | 栗田工业株式会社 | Method for cleaning membrane separation device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106552513B (en) | 2020-04-21 |
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