CN109954406A - A kind of reverse osmosis membrane cleaning process - Google Patents
A kind of reverse osmosis membrane cleaning process Download PDFInfo
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- CN109954406A CN109954406A CN201910393332.3A CN201910393332A CN109954406A CN 109954406 A CN109954406 A CN 109954406A CN 201910393332 A CN201910393332 A CN 201910393332A CN 109954406 A CN109954406 A CN 109954406A
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- reverse osmosis
- osmosis membrane
- cleaning process
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- lye
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- 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
- 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
- B01D65/022—Membrane sterilisation
-
- 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
Abstract
The present invention relates to reverse osmosis membranes to clean related fields, more particularly to a kind of reverse osmosis membrane cleaning process, which mainly includes acid solution combined with micro-nano bubble and ultrasonic treatment reverse osmosis membrane is cleaned, reverse osmosis water rinses, lye combined with micro-nano bubble and ultrasonic treatment reverse osmosis membrane is cleaned, reverse osmosis water four steps of cleaning.Reverse osmosis membrane cleaning efficiency is high in the application, cleaning effect is good, cleaning will not cause to damage to reverse osmosis membrane, so as to extend the service life of reverse osmosis membrane.
Description
Technical field
The present invention relates to reverse osmosis membranes to clean related fields, and in particular to a kind of reverse osmosis membrane cleaning process.
Background technique
Reverse osmosis membrane is artificial semi-permeable membrane with certain characteristics made of a kind of simulation biological semi-permeable film, is reverse osmosis skill
The core component of art.Reverse osmosis technology principle is cannot to penetrate half according to other substances under the action of being higher than solution osmotic pressure
Permeable membrane and these substances and water are separated.The membrane aperture of reverse osmosis membrane is very small, therefore can be effectively removed in water
Dissolved salts, colloid, microorganism, organic matter etc..
Reverse osmosis unit can accumulate colloid, metal oxide, thin after running for a period of time, in reverse osmosis membrane concentrated water side
The substances such as bacterium, organic matter or scale, cause reverse osmosis membrane dirt block, so as to cause system salt rejection rate decline, water yield reduce and
The problems such as pressure difference increases.It would therefore be desirable to be cleaned in time to reverse osmosis membrane.Reverse osmosis dirty stifled object specifically includes that organic
Fouling, microorganism dirt are stifled and inorganic dirty stifled.Cleaning process common in the art is the acid solution matched using a certain concentration
Reverse osmosis membrane is cleaned respectively with lye, such cleaning method is chemical cleaning, and cleaning efficiency is low, cleaning effect one
As.Reverse osmosis membrane cannot thoroughly be cleaned, to not be able to satisfy the demand used.
Therefore, in order to improve reverse osmosis cleaning effect, the cleaning efficiency of reverse osmosis membrane is improved, the invention proposes one kind
Reverse osmosis membrane cleaning process.
Summary of the invention
In view of this, the application provides a kind of reverse osmosis membrane cleaning process, this cleaning process is using physical cleaning and chemistry
It cleans the mode combined to clean reverse osmosis membrane, cleaning effect is good, and cleaning efficiency is high.
A kind of reverse osmosis membrane cleaning process, mainly includes the following steps that,
Step 1: reverse osmosis membrane being put into acid solution and is cleaned, and is passed through micro-nano bubble in cleaning process into acid solution,
It is then turned on ultrasound and micro- ultrasonic treatment is carried out to acid solution；
Step 2: the reverse osmosis membrane through overpickling is rinsed with reverse osmosis water；
Step 3: the reverse osmosis membrane after cleaning in step 2 is put into lye and is cleaned, to lye in cleaning process
In be passed through micro-nano bubble, be then turned on ultrasound lye is ultrasonically treated；
Step 4: the reverse osmosis membrane Jing Guo alkali cleaning is rinsed with reverse osmosis water.
Preferably, the acid solution in the step 1 includes the component of following mass parts meter: 3.5~4 parts of organic acids, 0.25~
0.5 part of acidity PH regulator, 2~3 parts of non oxidizing bactericides；PH=3.5~4 of the acid solution.
Preferably, the lye in the step 3 includes the component of following mass parts meter: 1~2 part of alkali, 0.15~0.25 part
Surfactant, 0.3~0.4 part of alkalinity PH regulator；PH=10~11 of the lye.
Preferably, the organic acid is citric acid, and the acidity PH regulator is hydrochloric acid, and the non oxidizing bactericide is
Antiphen.
Preferably, the alkali is one of sodium hydroxide and potassium hydroxide, and the surfactant is sodium glycocholate, institute
Stating alkaline PH regulator is sodium hydroxide.
Preferably, the micro-nano bubble is generated by micro-nano bubble generator, the end of micro-nano bubble generator
It is connected with water pipe, water pipe protrudes into acid or alkaline solution.
Preferably, the partial size of the micro-nano bubble is 100~10000nm.
Preferably, the ultrasound is generated by processor for ultrasonic wave, ultrasonic power be 50~80W, frequency be 60~
80KHz, to avoid reverse osmosis membrane by ultrasound injury, ultrasonic power is no more than 80W.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are: the present invention uses physical principle
Reverse osmosis membrane is cleaned with the method that the principles of chemistry combine, i.e., be respectively adopted in acid solution and lye ultrasound with it is micro-nano
The mode that bubble phase combines cleans reverse osmosis membrane；Such cleaning way cleaning efficiency is high, and cleaning effect is good, cleans
Reverse osmosis membrane will not be caused to damage in journey, so as to extend the service life of reverse osmosis membrane.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with embodiment of the present invention,
Technical solution in embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only this
Invent a part of embodiment, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.In the absence of conflict, the feature in the embodiment and embodiment in the present invention can mutual any combination.
Embodiment one
A kind of reverse osmosis membrane cleaning process, mainly includes the following steps that,
Step 1: reverse osmosis membrane being put into acid solution and is cleaned, and is passed through micro-nano bubble in cleaning process into acid solution,
Ultrasound is then turned on to be ultrasonically treated acid solution；Wherein, acid solution includes the component of following mass parts meter: 3.5~4 portions of lemons
Acid, 0.25~0.5 part of hydrochloric acid, 2~3 parts of antiphens；PH=3.5~4 of acid solution in cleaning process；
Step 2: the reverse osmosis membrane through overpickling is rinsed with reverse osmosis water；Washing time is 30~40min；
Step 3: the reverse osmosis membrane after cleaning in step 2 is put into lye and is cleaned, to lye in cleaning process
In be passed through micro-nano bubble, be then turned on ultrasound lye is ultrasonically treated；Wherein, lye includes the group of following mass parts meter
Part: 1~2 part of sodium hydroxide or potassium hydroxide, 0.15~0.25 part of sodium glycocholate, 0.3~0.4 part of sodium hydroxide；Cleaning process
In, PH=10~11 of lye；
Step 4: the reverse osmosis membrane Jing Guo alkali cleaning is rinsed with reverse osmosis water, and washing time is 30~40min.
In the process of cleaning, two cleaning frames for being respectively provided with acid solution and lye are in parallel, cleaning frame bottom is equipped with frame column,
Reverse osmosis membrane to be cleaned is placed on frame column.Two cleaning frame bottoms are provided with processor for ultrasonic wave, processor for ultrasonic wave
It is controlled by ultrasonic wave control panel.Two cleaning outer frame sides are equipped with micro-nano bubble generator, and micro-nano bubble occurs
The end of device is connected with water pipe, and water pipe protrudes into acid or alkaline solution.The micro-nano bubble that micro-nano bubble generator generates
Partial size be 100~10000nm.
In step 1 and step 3, the power of the ultrasound of ultrasonic treatment is 50~80W, and frequency is 60~80KHz, work
Time is 3s, intermittent time 1s.
In the present embodiment and following embodiments, micro-nano bubble surface is negatively charged, has stronger absorption to cation
Effect is adsorbed calcium ion, magnesium ion of film surface etc. and is entered in solution, achievees the purpose that cleaning.Micro-nano bubble respectively with acid
Property and alkaline solution to combine the principle cleaned to reverse osmosis membrane be that micro-nano bubble carries out the pollutant on reverse osmosis membrane
Absorption brings pollutant into liquid phase, and neutralization reaction occurs with bronsted lowry acids and bases bronsted lowry respectively in the liquid phase for pollutant, displacement is reacted, and is formed new
Compound precipitation, to achieve the effect that cleaning.After the micro-nano bubble in acid solution or lye reaches a certain concentration, open
Ultrasonic processor is ultrasonically treated.Ultrasonic wave has high frequency radiation, and radiating surface generates high-frequency vibration, and high-frequency vibration makes reverse osmosis
The pollutant of film surface be detached from film surface and further with micro-nano bubble ining conjunction with or with acid solution or lye occur to chemically react and
Further achieve the effect that cleaning.Meanwhile during ultrasonic treatment, micro-nano bubble can obtain energy under ultrasonication
Amount, carries out secondary empty verbiage, micro-nano style expands in secondary cavitation processes, the micro-nano bubbles burst in part, micro-nano
By the percussion of minute yardstick during bubbles burst, enhance cleaning dynamics, improves cleaning efficiency.Therefore, lead in the present invention
Cross acid solution with micro-nano bubble and ultrasonic treatment combine, lye with micro-nano bubble and be ultrasonically treated combine respectively to reverse osmosis
Permeable membrane, which carries out cleaning, can improve the cleaning efficiency, and guarantee that cleaning effect is good, at the same time it can also be ensured that will not be to anti-in cleaning process
Permeable membrane causes to damage, to extend the service life of reverse osmosis membrane.
Embodiment two
A kind of reverse osmosis membrane cleaning process, mainly includes the following steps that,
Step 1: reverse osmosis membrane being put into acid solution and is cleaned, and is passed through micro-nano bubble in cleaning process into acid solution,
Ultrasound is then turned on to be ultrasonically treated acid solution；Wherein, acid solution includes the component of following mass parts meter: 3.5 parts of citric acids,
0.25 part of hydrochloric acid, 2 parts of antiphens；The PH=3.5 of acid solution in cleaning process；
Step 2: the reverse osmosis membrane through overpickling is rinsed with reverse osmosis water；Scavenging period is 30min；
Step 3: the reverse osmosis membrane after cleaning in step 2 is put into lye and is cleaned, to lye in cleaning process
In be passed through micro-nano bubble, be then turned on ultrasound lye is ultrasonically treated；Wherein, lye includes the group of following mass parts meter
Part: 1 part of sodium hydroxide or potassium hydroxide, 0.15 part of sodium glycocholate, 0.3 part of sodium hydroxide；In cleaning process, the PH=of lye
10；
Step 4: the reverse osmosis membrane Jing Guo alkali cleaning is rinsed with reverse osmosis water, scavenging period 30min.
In the process of cleaning, two cleaning frames for being respectively provided with acid solution and lye are in parallel, cleaning frame bottom is equipped with frame column,
Reverse osmosis membrane to be cleaned is placed on frame column.Two cleaning frame bottoms are provided with processor for ultrasonic wave, processor for ultrasonic wave
It is controlled by ultrasonic wave control panel.Two cleaning outer frame sides are equipped with micro-nano bubble generator, and micro-nano bubble occurs
The end of device is connected with water pipe, and water pipe protrudes into acid or alkaline solution.The micro-nano bubble that micro-nano bubble generator generates
Partial size be 100nm.
In step 1 and step 3, the power of the ultrasound of ultrasonic treatment is 50W, frequency 60KHz, and the working time is
3s, intermittent time 1s.
Embodiment three
A kind of reverse osmosis membrane cleaning process, mainly includes the following steps that,
Step 1: reverse osmosis membrane being put into acid solution and is cleaned, and is passed through micro-nano bubble in cleaning process into acid solution,
Ultrasound is then turned on to be ultrasonically treated acid solution；Wherein, acid solution includes the component of following mass parts meter: 3.8 parts of citric acids,
0.38 part of hydrochloric acid, 2.5 parts of antiphens；The PH=3.8 of acid solution in cleaning process；
Step 2: the reverse osmosis membrane through overpickling is rinsed with reverse osmosis water；Scavenging period is 35min；
Step 3: the reverse osmosis membrane after cleaning in step 2 is put into lye and is cleaned, to lye in cleaning process
In be passed through micro-nano bubble, be then turned on ultrasound lye is ultrasonically treated；Wherein, lye includes the group of following mass parts meter
Part: .5 parts of sodium hydroxides or potassium hydroxide, 0.2 part of sodium glycocholate, 0.35 part of sodium hydroxide；In cleaning process, the PH=of lye
10.5；
Step 4: the reverse osmosis membrane Jing Guo alkali cleaning is rinsed with reverse osmosis water, scavenging period 35min.
In the process of cleaning, two cleaning frames for being respectively provided with acid solution and lye are in parallel, cleaning frame bottom is equipped with frame column,
Reverse osmosis membrane to be cleaned is placed on frame column.Two cleaning frame bottoms are provided with processor for ultrasonic wave, processor for ultrasonic wave
It is controlled by ultrasonic wave control panel.Two cleaning outer frame sides are equipped with micro-nano bubble generator, and micro-nano bubble occurs
The end of device is connected with water pipe, and water pipe protrudes into acid or alkaline solution.The micro-nano bubble that micro-nano bubble generator generates
Partial size be 1000nm.
In step 1 and step 3, the power of the ultrasound of ultrasonic treatment is 65W, frequency 70KHz, and the working time is
3s, intermittent time 1s.
Embodiment four
A kind of reverse osmosis membrane cleaning process, mainly includes the following steps that,
Step 1: reverse osmosis membrane being put into acid solution and is cleaned, and is passed through micro-nano bubble in cleaning process into acid solution,
Ultrasound is then turned on to be ultrasonically treated acid solution；Wherein, acid solution includes the component of following mass parts meter: 4 parts of citric acids, 0.5
Part hydrochloric acid, 3 parts of antiphens；The PH=4 of acid solution in cleaning process；
Step 2: the reverse osmosis membrane through overpickling is rinsed with reverse osmosis water；Scavenging period is 40min；
Step 3: the reverse osmosis membrane after cleaning in step 2 is put into lye and is cleaned, to lye in cleaning process
In be passed through micro-nano bubble, be then turned on ultrasound lye is ultrasonically treated；Wherein, lye includes the group of following mass parts meter
Part: 2 parts of sodium hydroxides or potassium hydroxide, 0.25 part of sodium glycocholate, 0.4 part of sodium hydroxide；In cleaning process, the PH=of lye
11；
Step 4: the reverse osmosis membrane Jing Guo alkali cleaning is rinsed with reverse osmosis water, scavenging period 40min.
In the process of cleaning, two cleaning frames for being respectively provided with acid solution and lye are in parallel, cleaning frame bottom is equipped with frame column,
Reverse osmosis membrane to be cleaned is placed on frame column.Two cleaning frame bottoms are provided with processor for ultrasonic wave, processor for ultrasonic wave
It is controlled by ultrasonic wave control panel.Two cleaning outer frame sides are equipped with micro-nano bubble generator, and micro-nano bubble occurs
The end of device is connected with water pipe, and water pipe protrudes into acid or alkaline solution.The micro-nano bubble that micro-nano bubble generator generates
Partial size be 10000nm.
In step 1 and step 3, the power of the ultrasound of ultrasonic treatment is 80W, frequency 80KHz, and the working time is
3s, intermittent time 1s.
The above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
Limitation of the invention, protection scope of the present invention should be defined by the scope defined by the claims..For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, these change
It also should be regarded as protection scope of the present invention into retouching.
Claims (8)
1. a kind of reverse osmosis membrane cleaning process, which is characterized in that it mainly includes the following steps that,
Step 1: reverse osmosis membrane being put into acid solution and is cleaned, and is passed through micro-nano bubble in cleaning process into acid solution, then
It opens ultrasound and micro- ultrasonic treatment is carried out to acid solution；
Step 2: the reverse osmosis membrane through overpickling is rinsed with reverse osmosis water；
Step 3: the reverse osmosis membrane after cleaning in step 2 is put into lye and is cleaned, is led in cleaning process into lye
Nano bubble in a subtle way is then turned on ultrasound and is ultrasonically treated to lye；
Step 4: the reverse osmosis membrane Jing Guo alkali cleaning is rinsed with reverse osmosis water.
2. a kind of reverse osmosis membrane cleaning process according to claim 1, it is characterised in that: the acid solution packet in the step 1
Include the component of following mass parts meter: 3.5~4 parts of organic acids, 0.25~0.5 part of acidity PH regulator, 2~3 parts non-oxidizable kill
Microbial inoculum；PH=3.5~4 of the acid solution.
3. a kind of reverse osmosis membrane cleaning process according to claim 1, it is characterised in that: the lye packet in the step 3
Include the component of following mass parts meter: 1~2 part of alkali, 0.15~0.25 part of surfactant, 0.3~0.4 part of alkalinity PH regulator；
PH=10~11 of the lye.
4. a kind of reverse osmosis membrane cleaning process according to claim 2, it is characterised in that: the organic acid is citric acid,
The acidity PH regulator is hydrochloric acid, and the non oxidizing bactericide is antiphen.
5. a kind of reverse osmosis membrane cleaning process according to claim 3, it is characterised in that: the alkali is sodium hydroxide and hydrogen
One of potassium oxide, the surfactant are sodium glycocholate, and the alkalinity PH regulator is sodium hydroxide.
6. a kind of reverse osmosis membrane cleaning process according to claim 1, it is characterised in that: the micro-nano bubble passes through micro-
Nano-bubble generator generates, and the end of micro-nano bubble generator is connected with water pipe, and water pipe protrudes into acid or alkaline solution.
7. a kind of reverse osmosis membrane cleaning process according to claim 1, it is characterised in that: the partial size of the micro-nano bubble
For 100~10000nm.
8. a kind of reverse osmosis membrane cleaning process according to claim 1, it is characterised in that: the ultrasound is by ultrasonication
Device generates, and ultrasonic power is 50~80W, and frequency is 60~80KHz.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910393332.3A CN109954406A (en) | 2019-05-13 | 2019-05-13 | A kind of reverse osmosis membrane cleaning process |
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| CN201910393332.3A CN109954406A (en) | 2019-05-13 | 2019-05-13 | A kind of reverse osmosis membrane cleaning process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113069931A (en) * | 2021-05-06 | 2021-07-06 | 镇江沁远电力设备有限公司 | Novel reverse osmosis membrane cleaning process |
| CN113648837A (en) * | 2021-07-23 | 2021-11-16 | 清乐环保科技(苏州)有限公司 | Method for cleaning highly-polluted reverse osmosis membrane |
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| CN1657143A (en) * | 2004-12-10 | 2005-08-24 | 沈阳建筑大学 | Method for washing hollow fiber membrane component |
| CN202606043U (en) * | 2012-06-06 | 2012-12-19 | 北京中农天陆微纳米气泡水科技有限公司 | Membrane cleaning device suitable for immersed membrane bioreactor |
| WO2017104194A1 (en) * | 2015-12-14 | 2017-06-22 | 三菱電機株式会社 | Washing device and washing method as well as membrane separation bioreactor |
| CN109224870A (en) * | 2018-11-19 | 2019-01-18 | 湖南军信环保股份有限公司 | A kind of nanofiltration, reverse osmosis membrane chemical cleaning method |
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2019
- 2019-05-13 CN CN201910393332.3A patent/CN109954406A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1657143A (en) * | 2004-12-10 | 2005-08-24 | 沈阳建筑大学 | Method for washing hollow fiber membrane component |
| CN202606043U (en) * | 2012-06-06 | 2012-12-19 | 北京中农天陆微纳米气泡水科技有限公司 | Membrane cleaning device suitable for immersed membrane bioreactor |
| WO2017104194A1 (en) * | 2015-12-14 | 2017-06-22 | 三菱電機株式会社 | Washing device and washing method as well as membrane separation bioreactor |
| CN109224870A (en) * | 2018-11-19 | 2019-01-18 | 湖南军信环保股份有限公司 | A kind of nanofiltration, reverse osmosis membrane chemical cleaning method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113069931A (en) * | 2021-05-06 | 2021-07-06 | 镇江沁远电力设备有限公司 | Novel reverse osmosis membrane cleaning process |
| CN113648837A (en) * | 2021-07-23 | 2021-11-16 | 清乐环保科技(苏州)有限公司 | Method for cleaning highly-polluted reverse osmosis membrane |
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