CN110252149A - A kind of off-line cleaning method being heavily polluted reverse osmosis membrane - Google Patents
A kind of off-line cleaning method being heavily polluted reverse osmosis membrane Download PDFInfo
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- CN110252149A CN110252149A CN201910560169.5A CN201910560169A CN110252149A CN 110252149 A CN110252149 A CN 110252149A CN 201910560169 A CN201910560169 A CN 201910560169A CN 110252149 A CN110252149 A CN 110252149A
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- water tank
- cleaning solution
- cleaning
- film
- impregnated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/10—Accessories; Auxiliary operations
-
- 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
- B01D2321/28—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling by soaking or impregnating
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nanotechnology (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A kind of off-line cleaning method being heavily polluted reverse osmosis membrane of the present invention, by first being cleaned to film both ends and appearance using giant, film is impregnated vertically again, it impregnates water tank bottom design honeycombed plastic plate and impregnates water tank, water tank will be impregnated using two suction pumps to be connected with cleaning solution regulating tank, the scavenger specially dilution impregnated in water tank was extracted into cleaning solution regulating tank in every 1 hour, pass through online pH control device, automatically adjust pH, scavenger specially dilution is pumped into again and impregnates water tank, when the pH that immersion water tank is extracted into cleaning solution regulating tank is completely unchanged, stop circulation action, film is packed into off-line cleaning device again and reinforces the schemes such as cleaning and detection using acid scavenger specially and alkaline scavenger specially.It cleans the reverse osmosis membrane being heavily polluted offline using the method, film properties can be restored substantially to state before cleaning.
Description
Technical field
The present invention relates to reverse osmosis membrane fields, and in particular, to a kind of offline cleaning side for being heavily polluted reverse osmosis membrane
Method.
Background technique
Raising with country to environmental requirement, most of factory all starts centering water and carries out reuse, wherein how much making greatly
It is all that counter-infiltration system or nanofiltration system carry out Treated sewage reusing.But due to surface water such as middle water water-quality ratio regular tap waters and
Complicated more of quality of groundwater, cause reverse osmosis membrane and nanofiltration membrane dirt stifled very fast, and it is dirty it is stifled very seriously, on-line cleaning is basic
It can not restore initial value, part film is even directly scrapped.To save system operation cost, need that reverse osmosis membrane will be heavily polluted
It is diagnosed and is cleaned offline.To understand the performance of every film and preferably can carry out cleaning reparation to film.
In existing processing technique, reverse osmosis membrane cleans general first using single regular hydrochloric acid or lemonade or hydroxide offline
Sodium carries out medicament immersion, can the dirt of part in film be softened or be dissolved in this way, then film is fitted into putamina, use cleaning pump
Carry out wash cycles.But the more serious film of some pollutions, not only there is serious scale formation, but also knot in film in the both ends of film
Dirty serious, immersion effect is excessively poor, and reagent consumption also quickly, impregnate effect with the short time and be not much different by immersion for a long time, impregnates
Effect is very little, and reagent consumption amount is very big when the cleaning agent impregnated with this online wash cycles, on-line cleaning film
Quantity and scavenging period are limited, need Membrane cleaning is thoroughly very difficult.
The reason of leading to this phenomenon, is: by research, all immersion effects it is poor, be since reagent consumption is very fast,
When just starting to immerse medicament in fermentation vat, hence it is evident that pH value variation occur, but since the reagent consumption immersed in film falls rear fermentation vat
In cleaning solution be difficult to touch with the pollutant in film, cause impregnate effect it is not in place, simultaneously because adding medicine in fermentation vat
Agent also can generate medicament unevenly and cause the damage that part water Chinese medicine excessive concentration causes film.
Summary of the invention
The present invention aims to overcome the above drawbacks, provides a kind of off-line cleaning method for being heavily polluted reverse osmosis membrane.
The present invention is by first cleaning film both ends and appearance using giant, then film is impregnated vertically, soaking water
Bottom portion designs honeycombed plastic plate and impregnates water tank, will impregnate water tank and cleaning solution regulating tank phase using two suction pumps
The cleaning solution impregnated in water tank can be extracted into cleaning solution regulating tank by suction pump, can also be incited somebody to action by another suction pump by company
Cleaning solution in cleaning solution regulating tank, which is extracted into, to be impregnated in water tank, is controlled by using automatic control system, will be impregnated within every 1 hour
Acid scavenger specially dilution in water tank is extracted into cleaning solution regulating tank, passes through online pH control device, automatic adjustment
PH, then acid scavenger specially dilution is pumped into and impregnates water tank, when impregnating, the pH that water tank is extracted into cleaning solution regulating tank is complete
When completely without variation, stop circulation action, then be flushed to neutrality after the water impregnated in water tank is emptied, later with alkaline Special cleaning
Dilution agent liquid continues cycling through soaking and washing movement, after acid scavenger specially and alkaline scavenger specially wash one time, then
Film is packed into off-line cleaning device and reinforces cleaning and detection using acid scavenger specially and alkaline scavenger specially.Use this side
Method cleans the reverse osmosis membrane being heavily polluted offline, and film properties can be restored substantially to state before cleaning.
Acidity scavenger specially described herein is the mixture of hydrochloric acid, oxalic acid, sulfamic acid and citric acid and water, specific matter
Amount is than being 0.5-1:0.5-1:1-5:1-5:10-20
The acidic cleaner it is capable of washing fall most carbonate scales, sulfate scale and metal oxide dirt.
It is described herein alkalinity scavenger specially are as follows: sodium hydroxide, sodium carbonate, EDTA2Na and neopelex and
The mixture of water, specific mass ratio are 0.5-1:1-2:1-5:1-5:10-20
The alkaline cleaner it is capable of washing fall most oily substances, organic matter and colloid pollution object.
In addition, a kind of off-line cleaning method for being heavily polluted reverse osmosis membrane provided by the invention, it is further characterized in that: it will
Film impregnates vertically, impregnates water tank bottom and designs honeycombed plastic plate, clear in film when water is extracted into cleaning solution regulating tank
Washing lotion also can quickly flow out, it is ensured that pollutant in the interior cleaning film of film can be entered by being again introduced into the cleaning solution impregnated in water tank.
In addition, a kind of off-line cleaning method for being heavily polluted reverse osmosis membrane provided by the invention, it is further characterized in that: make
Water tank will be impregnated with two suction pumps to be connected with cleaning solution regulating tank, can be taken out by suction pump by the cleaning solution in water tank is impregnated
To cleaning solution regulating tank, also the cleaning solution in cleaning solution regulating tank can be extracted into immersion water tank by another suction pump
In.
In addition, a kind of off-line cleaning method for being heavily polluted reverse osmosis membrane provided by the invention, it is further characterized in that: it is logical
It crosses and is controlled using automatic control system, the cleaning agent dilution impregnated in water tank was extracted into cleaning solution regulating tank in every 1 hour,
By online pH control device, pH is automatically adjusted, then cleaning solution is pumped into and impregnates water tank, is extracted into cleaning solution adjusting when impregnating water tank
When pH in water tank is completely unchanged, stop circulation action.
In addition, a kind of off-line cleaning method for being heavily polluted reverse osmosis membrane provided by the invention, it is further characterized in that: leaching
Film is packed into off-line cleaning device again after the completion of bubble and carries out reinforcement cleaning using acid scavenger specially and alkaline scavenger specially
And detection.
The function and effect of the present invention are as follows:
1, it is robbed by high pressure water and physics flushing is carried out to film both ends and appearance；
2, film is impregnated respectively using acid scavenger specially and alkaline scavenger specially respectively, reaches preferably clear
Wash effect；
3, the cleaning solution for adjusting pH after draining by dedicated unit to the Membrane cleaning liquid in immersion and more renewing, it is ensured that in film
Keep fresh cleaning solution；
4, film is packed into system again after impregnating and carries out reinforcement cleaning using acid scavenger specially and alkaline scavenger specially
And detection, it is ensured that final cleaning effect.
Specific embodiment
The present embodiment is by first cleaning film both ends and appearance using giant, then film is impregnated vertically, impregnates
Water tank bottom designs honeycombed plastic plate and impregnates water tank, will impregnate water tank and cleaning solution regulating tank phase using two suction pumps
The cleaning solution impregnated in water tank can be extracted into cleaning solution regulating tank by suction pump, can also be incited somebody to action by another suction pump by company
Cleaning solution in cleaning solution regulating tank, which is extracted into, to be impregnated in water tank, is controlled by using automatic control system, will be impregnated within every 1 hour
Acid scavenger specially dilution in water tank is extracted into cleaning solution regulating tank, passes through online pH control device, automatic adjustment
PH, then acid scavenger specially dilution is pumped into and impregnates water tank, when impregnating, the pH that water tank is extracted into cleaning solution regulating tank is complete
When completely without variation, stop circulation action, then be flushed to neutrality after the water impregnated in water tank is emptied, later with alkaline Special cleaning
Dilution agent liquid continues cycling through soaking and washing movement, after acid scavenger specially and alkaline scavenger specially wash one time, then
Film is packed into off-line cleaning device and reinforces cleaning and detection using acid scavenger specially and alkaline scavenger specially.Use this side
Method cleans the reverse osmosis membrane being heavily polluted offline, and film properties can be restored substantially to state before cleaning.
Acidity scavenger specially described herein is the mixture of hydrochloric acid, oxalic acid, sulfamic acid and citric acid and water, specific matter
Amount is than being 0.5-1:0.5-1:1-5:1-5:10-20
The acidic cleaner it is capable of washing fall most carbonate scales, sulfate scale and metal oxide dirt.
It is described herein alkalinity scavenger specially are as follows: sodium hydroxide, sodium carbonate, EDTA2Na and neopelex and
The mixture of water, specific mass ratio are 0.5-1:1-2:1-5:1-5:10-20
The alkaline cleaner it is capable of washing fall most oily substances, organic matter and colloid pollution object.
In addition, in the present embodiment, also impregnating film vertically, impregnates water tank bottom and design honeycombed plastic plate, work as water
When being extracted into cleaning solution regulating tank, the cleaning solution in film also can quickly flow out, it is ensured that be again introduced into the cleaning impregnated in water tank
Liquid, which can enter, cleans pollutant in film in film.
In addition, in the present embodiment, will also impregnate water tank using two suction pumps and be connected with cleaning solution regulating tank, can lead to
It crosses suction pump and the cleaning solution impregnated in water tank is extracted into cleaning solution regulating tank, it also can be by another suction pump by cleaning solution tune
Cleaning solution in water-saving box, which is extracted into, to be impregnated in water tank.
In addition, in the present embodiment, also being controlled by using automatic control system, will impregnate within every 1 hour clear in water tank
Lotion dilution is extracted into cleaning solution regulating tank, by online pH control device, automatically adjusts pH, then cleaning solution is pumped into and is soaked
Soaking tank stops circulation action when the pH that immersion water tank is extracted into cleaning solution regulating tank is completely unchanged.
In addition, in the present embodiment, film being packed into off-line cleaning device again after the completion of also impregnating and uses acid Special cleaning
Agent and alkaline scavenger specially carry out reinforcing cleaning and detection.
The effect and effect of the present embodiment:
1, it is robbed by high pressure water and physics flushing is carried out to film both ends and appearance；
2, film is impregnated respectively using acid scavenger specially and alkaline scavenger specially respectively, reaches preferably clear
Wash effect；
3, the cleaning solution for adjusting pH after draining by dedicated unit to the Membrane cleaning liquid in immersion and more renewing, it is ensured that in film
Keep fresh cleaning solution；
4, film is packed into system again after impregnating and carries out reinforcement cleaning using acid scavenger specially and alkaline scavenger specially
And detection, it is ensured that final cleaning effect.
Claims (9)
1. a kind of off-line cleaning method for being heavily polluted reverse osmosis membrane, it is characterised in that: by first making to film both ends and appearance
It is cleaned with giant, then film is impregnated vertically, impregnated water tank bottom design honeycombed plastic plate and impregnate water tank, use
Two suction pumps will impregnate water tank and be connected with cleaning solution regulating tank, can be extracted into the cleaning solution impregnated in water tank by suction pump
Cleaning solution in cleaning solution regulating tank can be also extracted by another suction pump and be impregnated in water tank by cleaning solution regulating tank,
It is controlled by using automatic control system, the acid scavenger specially dilution impregnated in water tank was extracted into cleaning solution in every 1 hour
In regulating tank, by online pH control device, pH is automatically adjusted, then acid scavenger specially dilution is pumped into soaking water
Case stops circulation action, then will impregnate in water tank when the pH that immersion water tank is extracted into cleaning solution regulating tank is completely unchanged
Water empty after be flushed to neutrality, soaking and washing movement is continued cycling through with alkaline scavenger specially dilution later, to acid special
After washing one time with cleaning agent and alkaline scavenger specially, then film is packed into off-line cleaning device and uses acid scavenger specially
It cleans and detects offline with alkaline scavenger specially.
2. a kind of off-line cleaning method for being heavily polluted reverse osmosis membrane as described in claim 1, it is characterised in that: the acid
Property scavenger specially be hydrochloric acid, oxalic acid, sulfamic acid and citric acid and water mixture.
3. a kind of off-line cleaning method for being heavily polluted reverse osmosis membrane as claimed in claim 2, it is characterised in that: the salt
The mass ratio of acid, oxalic acid, sulfamic acid and citric acid and water is 0.5-1:0.5-1:1-5:1-5:10-20.
4. a kind of off-line cleaning method for being heavily polluted reverse osmosis membrane as described in claim 1, it is characterised in that: the alkali
Property scavenger specially are as follows: the mixture of sodium hydroxide, sodium carbonate, EDTA2Na and neopelex and water.
5. a kind of off-line cleaning method for being heavily polluted reverse osmosis membrane as claimed in claim 4, it is characterised in that: the alkali
Property scavenger specially are as follows: the mass ratio of sodium hydroxide, sodium carbonate, EDTA2Na and neopelex and water be 0.5-1:
1-2:1-5:1-5:10-20.
6. a kind of off-line cleaning method for being heavily polluted reverse osmosis membrane as described in claim 1, it is characterised in that: erect film
It is straight to impregnate, it impregnates water tank bottom and designs honeycombed plastic plate, the cleaning solution when water is extracted into cleaning solution regulating tank, in film
Also it can quickly flow out, it is ensured that pollutant in the interior cleaning film of film can be entered by being again introduced into the cleaning solution impregnated in water tank.
7. a kind of off-line cleaning method for being heavily polluted reverse osmosis membrane as described in claim 1, it is characterised in that: use two
A suction pump will impregnate water tank and be connected with cleaning solution regulating tank, can be extracted into the cleaning solution impregnated in water tank clearly by suction pump
Cleaning solution in cleaning solution regulating tank can be also extracted by another suction pump and be impregnated in water tank by washing lotion regulating tank.
8. a kind of off-line cleaning method for being heavily polluted reverse osmosis membrane as described in claim 1, it is characterised in that: by making
It is controlled with automatic control system, the cleaning agent dilution impregnated in water tank was extracted into cleaning solution regulating tank in every 1 hour, is passed through
Online pH control device automatically adjusts pH, then cleaning solution is pumped into and impregnates water tank, is extracted into cleaning solution regulating tank when impregnating water tank
In pH it is completely unchanged when, stop circulation action.
9. a kind of off-line cleaning method for being heavily polluted reverse osmosis membrane as described in claim 1, it is characterised in that: impregnated
Film is packed into off-line cleaning device and carries out reinforcing cleaning and inspection using acid scavenger specially and alkaline scavenger specially by Cheng Houzai
It surveys.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910560169.5A CN110252149A (en) | 2019-06-26 | 2019-06-26 | A kind of off-line cleaning method being heavily polluted reverse osmosis membrane |
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| CN201910560169.5A CN110252149A (en) | 2019-06-26 | 2019-06-26 | A kind of off-line cleaning method being heavily polluted reverse osmosis membrane |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112604504A (en) * | 2020-11-27 | 2021-04-06 | 乌鲁木齐河西水务有限公司 | Sewage plant MBR membrane module off-line cleaning method |
| CN112999882A (en) * | 2021-04-16 | 2021-06-22 | 厦门市天泉鑫膜科技股份有限公司 | High-efficiency acidic cleaning agent for landfill leachate pollutants and application thereof |
| CN113996185A (en) * | 2021-11-09 | 2022-02-01 | 江苏拓邦环保科技有限公司 | Reverse osmosis membrane circulation belt cleaning device |
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Application publication date: 20190920 |