CN108079668A - The cleaning method of filter screen - Google Patents
The cleaning method of filter screen Download PDFInfo
- Publication number
- CN108079668A CN108079668A CN201611044306.2A CN201611044306A CN108079668A CN 108079668 A CN108079668 A CN 108079668A CN 201611044306 A CN201611044306 A CN 201611044306A CN 108079668 A CN108079668 A CN 108079668A
- Authority
- CN
- China
- Prior art keywords
- filter screen
- cleaning method
- mass fraction
- concentration
- back flush
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D41/00—Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids
- B01D41/04—Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids of rigid self-supporting filtering material
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Detergent Compositions (AREA)
Abstract
The cleaning method of the filter screen of the present invention, including：First time caustic scrubbing step：Mass fraction is used to carry out positive flushing for 1%~3% sodium hydroxide solution；Acid pickling step：The hydrochloric acid solution that mass fraction is used to be 0.4%~1.2% for 1%~2% oxalic acid or mass fraction carries out back flush；Water rinsing step：Back flush is carried out using demineralized water, the flow of demineralized water is 2~4 times of the filtering traffic of filter screen.It can not only improve cleaning performance, reduce cost, and can reduce chemical agent pollution.
Description
Technical field
The present invention relates to Treatment of Industrial Water field more particularly to a kind of cleaning methods of filter screen.
Background technology
In Treatment of Industrial Water field, filtering network technology is a kind of common practical technique, have it is efficient, energy saving, pollution-free,
The advantages of easy to operate.In use for some time, it may appear that the situation of network pollution is filtered, so as to hinder filter effect.It is existing
Cleaning method usually cleaned using chemicals, since the concentration of chemicals is higher, had after cleaning medicament residual.
Now, a kind of new cleaning method is introduced, on the one hand can reduce the medicament pollution of chemistry, another convenience also may be used
Targetedly to be cleaned for filter screen, so as to make cleaning method more effective, and reduce cost.
So there is an urgent need for a kind of cleaning method of improved filter screen, one side improves cleaning performance, reduces cost, separately
On the one hand chemical agent pollution is reduced.
The content of the invention
It is an object of the invention to provide a kind of cleaning method of filter screen, can not only improve cleaning performance, reduce into
This, and chemical agent pollution can be reduced.
To achieve the above object, the cleaning method of filter screen of the invention, including：
First time caustic scrubbing step：Mass fraction is used to carry out positive flushing for 1%~3% sodium hydroxide solution；
Acid pickling step：The hydrochloric acid that mass fraction is used to be 0.4%~1.2% for 1%~2% oxalic acid or mass fraction is molten
Liquid carries out back flush；
Water rinsing step：Back flush is carried out using demineralized water, the flow of demineralized water for the filtering traffic of filter screen 2~
4 times.
Compared with prior art, the present invention carries out positive flushing by using alkaline solution, then using acid solution into
Row back flush and demineralized water back flush can effectively clean the pollutant on filter screen, such as iron rust or organic microbial, and
And the moderate concentration of alkaline solution and acid solution, reduce chemical contamination.In addition, the alkaline solution and acid solution that use hold
Easily obtain, it is of low cost.
It is preferred that it is further included after the water rinsing step：Drying steps：The filter screen is dried；And second
Secondary caustic scrubbing step：Filter screen concentration be 0.05%~0.15% sodium hydroxide and concentration be 0.2%~0.5% hypochlorous acid
It is cleaned in the mixed liquor of sodium.
It is preferred that it is further included after second of caustic scrubbing step：Use concentration for 1.5%~2.0% hypochlorous acid
When immersion 1~2 is small in sodium solution.
It is preferred that the temperature of the mixed liquor in second of caustic scrubbing step is 35~40 degree, pH value is 11.5~12.0.
It is preferred that it is also wrapped after when immersion 1~2 is small in using concentration as 1.5%~2.0% liquor natrii hypochloritis
It includes：The filter screen is dried.
It is preferred that the drying steps include：The filter screen is drained at normal temperatures and is added in high temperature drying case
Heated drying.
Specific embodiment
The recovery method of ionic liquid of the present invention is described further with reference to embodiment, but is not so limited this hair
It is bright.
The cleaning method of the filter screen of the present invention comprises the following steps：
First time caustic scrubbing step：Mass fraction is used to carry out positive flushing for 1%~3% sodium hydroxide solution；
Acid pickling step：The hydrochloric acid that mass fraction is used to be 0.4%~1.2% for 1%~2% oxalic acid or mass fraction is molten
Liquid carries out back flush；
Water rinsing step：Back flush is carried out using demineralized water, the flow of demineralized water for the filtering traffic of filter screen 2~
4 times.
Specifically, the present invention uses water pump wash cycles mode, and in first time caustic scrubbing step, positive water pump is opened,
Alkaline solution carries out filter screen under the action of water pump positive flushing.The pollutant washed out is mainly by organic matter or micro- life
Object, deposition of iron object composition.
In acid pickling step and water rinsing step, reversed water pump is opened, use mass fraction for 1%~2% oxalic acid
Or the hydrochloric acid solution that mass fraction is 0.4%~1.2% carries out back flush.The pollutant cleaned in acid cleaning process is mainly iron
Deposit.In cleaning process, ultrafiltration system drops to 0.03MPa across strainer pressure difference from 0.1MPa.System production after cleaning
Water flow is from 125m before3/ h rises to 170m3/h。
In water rinsing step, the flow of water is 2~4 times of the filtering traffic of filter screen.Waste water is emptied after cleaning.
The present invention carries out positive flushing by using alkaline solution, then carries out back flush and desalination using acid solution
Water back flush can effectively clean the pollutant on filter screen, such as iron rust or organic microbial, and alkaline solution and acidity
The moderate concentration of solution reduces chemical contamination.The alkaline solution and acid solution of use are readily available, of low cost.
In order to further clean the attachment of filtering net surface, in another preferred embodiment of the invention, in Shui Chong
It washes further comprising the steps of after step：
Drying steps：The filter screen is dried；Specifically, filter screen draining at normal temperatures is placed on 120 degree of drying box
In be thermally dried 3 it is small when.
Second of caustic scrubbing step：Filter screen concentration be 0.05%~0.15% sodium hydroxide and concentration be 0.2%~
It is cleaned in the mixed liquor of 0.5% sodium hypochlorite；Specifically, the temperature of mixed liquor is 35~40 degree, and pH value is 11.5~12.0.
It impregnates：When immersion 1~2 is small during concentration is used as 1.5%~2.0% liquor natrii hypochloritis；And
Redrying：Filter screen is subjected to redrying, specifically, when drying 1 is small in 45 degree of drying box.
The above disclosed right for being only presently preferred embodiments of the present invention, the present invention cannot being limited with this certainly
Scope, therefore the equivalent variations made according to scope of the present invention patent, are still within the scope of the present invention.
Claims (6)
1. a kind of cleaning method of filter screen, including：
First time caustic scrubbing step：Mass fraction is used to carry out positive flushing for 1%~3% sodium hydroxide solution；
Acid pickling step：Use mass fraction for the hydrochloric acid solution that 1%~2% oxalic acid or mass fraction is 0.4%~1.2% into
Row back flush；
Water rinsing step：Back flush is carried out using demineralized water, the flow of demineralized water is 2~4 times of the filtering traffic of filter screen.
2. the cleaning method of filter screen as described in claim 1, it is characterised in that：It is also wrapped after the water rinsing step
It includes：
Drying steps：The filter screen is dried；And
Second of caustic scrubbing step：Filter screen concentration be 0.05%~0.15% sodium hydroxide and concentration be 0.2%~0.5%
Sodium hypochlorite mixed liquor in clean.
3. the cleaning method of filter screen as claimed in claim 2, it is characterised in that：After second of caustic scrubbing step also
Including：When immersion 1~2 is small during concentration is used as 1.5%~2.0% liquor natrii hypochloritis.
4. the cleaning method of filter screen as claimed in claim 2, it is characterised in that：Mixing in second of caustic scrubbing step
The temperature of liquid is 35~40 degree, and pH value is 11.5~12.0.
5. the cleaning method of filter screen as claimed in claim 3, it is characterised in that：Concentration is being used as 1.5%~2.0%
It is further included after when immersion 1~2 is small in liquor natrii hypochloritis：The filter screen is dried.
6. the cleaning method of filter screen as claimed in claim 2, it is characterised in that：The drying steps include：By the mistake
Strainer drains at normal temperatures and the heat drying in high temperature drying case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611044306.2A CN108079668A (en) | 2016-11-22 | 2016-11-22 | The cleaning method of filter screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611044306.2A CN108079668A (en) | 2016-11-22 | 2016-11-22 | The cleaning method of filter screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108079668A true CN108079668A (en) | 2018-05-29 |
Family
ID=62171065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611044306.2A Pending CN108079668A (en) | 2016-11-22 | 2016-11-22 | The cleaning method of filter screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108079668A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112843881A (en) * | 2019-11-27 | 2021-05-28 | 东莞新科技术研究开发有限公司 | Method for cleaning filter screen |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102397752A (en) * | 2010-09-09 | 2012-04-04 | 山西太钢不锈钢股份有限公司 | Method for cleaning ultrafiltration membrane |
| CN102580537A (en) * | 2012-03-05 | 2012-07-18 | 山西太钢不锈钢股份有限公司 | Method for regenerating filter core of security filter |
| CN104001378A (en) * | 2013-02-27 | 2014-08-27 | 上海阿科玛双氧水有限公司 | Cleaning method for filter core used for hydrogen peroxide production process |
| CN104548755A (en) * | 2013-10-14 | 2015-04-29 | 青岛市首胜实业有限公司 | Method for cleaning stainless steel powder-sintered filter core |
| CN105363280A (en) * | 2015-11-17 | 2016-03-02 | 成都丽雅纤维股份有限公司 | Method for cleaning filter screen of KKF full-automatic backwashing filter |
-
2016
- 2016-11-22 CN CN201611044306.2A patent/CN108079668A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102397752A (en) * | 2010-09-09 | 2012-04-04 | 山西太钢不锈钢股份有限公司 | Method for cleaning ultrafiltration membrane |
| CN102580537A (en) * | 2012-03-05 | 2012-07-18 | 山西太钢不锈钢股份有限公司 | Method for regenerating filter core of security filter |
| CN104001378A (en) * | 2013-02-27 | 2014-08-27 | 上海阿科玛双氧水有限公司 | Cleaning method for filter core used for hydrogen peroxide production process |
| CN104548755A (en) * | 2013-10-14 | 2015-04-29 | 青岛市首胜实业有限公司 | Method for cleaning stainless steel powder-sintered filter core |
| CN105363280A (en) * | 2015-11-17 | 2016-03-02 | 成都丽雅纤维股份有限公司 | Method for cleaning filter screen of KKF full-automatic backwashing filter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112843881A (en) * | 2019-11-27 | 2021-05-28 | 东莞新科技术研究开发有限公司 | Method for cleaning filter screen |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180529 |
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| RJ01 | Rejection of invention patent application after publication |