CN102806016A - Off-line cleaning method for reverse osmosis membranes - Google Patents
Off-line cleaning method for reverse osmosis membranes Download PDFInfo
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- CN102806016A CN102806016A CN2012102705830A CN201210270583A CN102806016A CN 102806016 A CN102806016 A CN 102806016A CN 2012102705830 A CN2012102705830 A CN 2012102705830A CN 201210270583 A CN201210270583 A CN 201210270583A CN 102806016 A CN102806016 A CN 102806016A
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Abstract
The invention discloses an off-line cleaning method for reverse osmosis membranes, which comprises the following steps of: 1) preparation of a cleaning solution with pH value of 10-13, wherein the cleaning solution comprises the following components in percentage by weight: 2-3% of sodium tripolyphosphate, 0.25-0.5% of sodium hydroxide solution, 0.25-0.5% of sodium dodecyl benzene sulfonate solution, and the balance of pure water; 2) ultrasonic cleaning: placing the reverse osmosis membranes into an ultrasonic cleaner, and ultrasonically oscillating to drop off the dirt from the surfaces of the reverse osmosis membranes; 3) circulatory cleaning: placing the reverse osmosis membranes into membrane shells, pumping the cleaning liquid medicine in a cleaning liquid storage tank into the membrane shells by a water supply pump so as to wash the reverse osmosis membranes, and recirculating the cleaning solution to the cleaning solution storage tank; circularly cleaning at low flow for 30-35 min, wherein the flow of a pressure container of each reverse osmosis membrane is 50-100L/min; circularly cleaning at high flow for 1-2 h, and the flow of a pressure container of each reverse osmosis membrane is 101-150L/min; and 4) washing: washing by pure water at low pressure for 20-30 min, thereby guaranteeing to remove the cleaning solution and impurities.
Description
Technical field:
The invention belongs to the counter-infiltration cleaning technique, particularly the reverse osmosis membrane off-line cleaning method through ultrasonic wave soaking and washing and Chemical cleaning, is removed the pollutant of reverse osmosis membrane surface deposition, is applicable to that the reverse osmosis membrane off-line cleans.This system detects the salt rejection rate of single film, flux etc. simultaneously.
Background technology
Reverse-osmosis membrane element is as the filtration means of deep layer, now in various water treatment system extensive uses.Its principle is: reverse osmosis membrane is the pellicle with selective permeation performance; In natural process, the side that salt content is lower can flow to the higher side of salt content through pellicle, and this scene is referred to as infiltration; Up to reaching balance, this is that the differential static pressure of the both sides of film is exactly an osmotic pressure.When applying an impressed pressure in salt solution one side, original balance can be destroyed, and impressed pressure will make the water of the higher side of salt content see through pellicle and flow to low side, and this phenomenon is counter-infiltration.
Owing to all contain certain density suspension and dissolved matter in the various former water, in reverse osmosis process, the volume of water inlet reduces, and the concentration of suspension and dissolved matter is increasing.Suspended particle can be deposited on the film, stops up water inlet flow channel, increases frictional resistance.Indissoluble salt can be precipitated out from dense water, on face, forms fouling, reduces the flux of reverse osmosis membrane, and this phenomenon at face formation sedimentary deposit is called film to be polluted, and the result that film pollutes is the deterioration of systematic function.
The reverse osmosis unit that uses in multiple field in case come into operation, after normal operation a period of time, all need clean.
Main at present on-line cleaning and the off-line of dividing of cleaning model cleans two kinds.
There is following problem in on-line cleaning owing to be the original technology of maintenance system in cleaning process:
1, counter-infiltration system putamina pressure vessel adopts the reverse osmosis membrane that is installed in series, and can 1 ~ 7 film be installed according to demand.In cleaning process, the pollutant under front end cleans possibly pollute the film of back.
2, in same putamina, the film pollution level of diverse location is all different, adopts identical cleaning method, does not reach cleaning performance.
3, the film pollution level in every putamina also all is not quite similar in big system, causes that when cleaning, to pollute light cleaning fluid flow big, and with serious pollution cleaning fluid flow is little, has a strong impact on cleaning performance.
Simultaneously, on-line cleaning is as the means of a kind of counter-infiltration system cleaning maintenance, impact sterilization and regular protection, and it is powerless when facing the reverse-osmosis membrane element serious pollution, just to seem, just need carry out off-line to reverse-osmosis membrane element this time and clean.
It is a kind of special cleaning device that single film is cleaned that utilizes that off-line cleans.Existing off-line cleaning device is made up of following equipment: cleaning fluid holding vessel, frequency conversion scavenging pump, security personnel's filter, heater, parallelly connected reverse osmosis membrane, raw water box, antisludging agent dosing pump, pure water case, dense water tank, instrument system and pipeline, and its cleaning performance is better than on-line cleaning, but to some foulings, dirty stifled more serious reverse osmosis membrane; Because the space is very little between the diaphragm; So cleaning agent is difficult to remove dirty thing within a short period of time, exists and clean phenomenon repeatedly; It cleans chemical agent and adopts 2% hydrochloric acid and 2% NaOH simultaneously; Because it belongs to strong acid and strong base, long-time cleaning meeting causes damage to reverse osmosis membrane, causes film properties to descend.
Summary of the invention
The object of the present invention is to provide a kind of reverse osmosis membrane off-line cleaning method; Not good to cleaning performance in the cleaning of counter-infiltration off-line; Clean repeatedly and be prone to film cause damage problem; Can significantly improve cleaning performance, avoid reverse osmosis membrane to clean repeatedly, reduce to damage prolongation in service life in period simultaneously.After cleaning, can produce the detection of water flux and salt rejection rate at last to single reverse osmosis membrane.
For achieving the above object, technical scheme of the present invention is:
A kind of reverse osmosis membrane off-line cleaning method, it comprises the steps:
1) preparation cleaning solution, cleaning solution composition percentage by weight is: sodium phosphate trimer 2 ~ 3%, sodium hydroxide solution 0.25 ~ 0.5%, neopelex solution 0.25 ~ 0.5%, all the other are pure water; PH value 10 ~ 13;
2) ultrasonic waves for cleaning is put into ultrasonic cleaner with reverse osmosis membrane, mixes above-mentioned cleaning soup again, through supersonic oscillations dirt is come off from the reverse osmosis membrane surface, and the ultrasonic waves for cleaning time is at 12 ~ 48h;
3) wash cycles
Reverse osmosis membrane is put into putamina, through supply-water pump the cleaning soup in the cleaning fluid storage tank is squeezed in the putamina, reverse osmosis membrane is cleaned, cleaning solution is recycled to the cleaning fluid storage tank, and the intake pressure of putamina is 0.3 ~ 0.5MPa;
Low discharge wash cycles, scavenging period are 30 ~ 35 minutes, and the pressure vessel flow of every reverse osmosis membrane is: 50 ~ 100 liters/minute;
High flow capacity wash cycles, scavenging period are 1 ~ 2 hour, and the pressure vessel flow of every reverse osmosis membrane is: 101 ~ 150 liters/minute;
4) flushing
Use the pure water low-pressure washing, pressure is 0.3 ~ 0.5MPa, and scavenging period is 20 ~ 30 minutes, guarantees that cleaning fluid and impurity are washed out.
Further, in the wash cycles process, after the low discharge wash cycles, reverse osmosis membrane is taked immersion treatment, immersion is carried out the high flow capacity wash cycles, soak time 1～24 hour after finishing again; Soak the back reverse osmosis membrane is washed with pure water repeatedly, guarantee that cleaning fluid and impurity are washed out.
Again, described cleaning solution temperature is 25 ~ 30 ℃.
In addition, the ultrasonic frequency 50 ~ 100KHz of described ultrasonic waves for cleaning.
The present invention adopts the method for off-line ultrasonic wave prerinse+organic and inorganic compound chemical cleaning agent to clean; Effect through supersonic oscillations; The dirt salt that make particulate fouling and membrane-bound organic dirt such as the packaged mixture of colloid, is concentrated; In film body,, increase and Chemical cleaning medicament haptoreaction face rapidly from film sur-face peeling and fragmentation.
Every pressure vessel of the present invention can independently store the reverse-osmosis membrane element that is cleaned.When adopting organic and inorganic compound chemical cleaning agent purging system to move, clean the stepless action of soup ability, the reactant of pollutant and Film impurity is gone out outside the film body, reduce the damage of chemical agent simultaneously film through the effect of current in every reverse-osmosis membrane element.
Beneficial effect of the present invention:
The shortcoming that online counter-infiltration is cleaned to tradition; The present invention adopts the technology of off-line ultrasonic waves for cleaning+Chemical cleaning; Can effectively promote cleaning performance, guarantee the counter-infiltration system salt rejection rate and produce water flux, can also detect the undesirable film of salt rejection rate simultaneously; It is eliminated, guarantees that counter-infiltration system normally moves:
At first clean, can significantly promote cleaning performance, produce water flux from minimum 0.5m through off-line ultrasonic waves for cleaning+organic and inorganic compound chemical medicament
3/ Hr returns to 1.1m
3/ Hr, salt rejection rate returns to 98 above %.
Conventional off-line cleans, and does not have ultrasonic waves for cleaning, the dirt stronger to some adhesivenesses, and cleaning performance is not good, has the situation of cleaning repeatedly.Adopt ultrasonic waves for cleaning, can make a dirt in film body rapidly from film sur-face peeling and fragmentation, increase and Chemical cleaning medicament haptoreaction face, strengthen cleaning performance.
Conventional to clean the cleaning agent that adopts be hydrochloric acid and NaOH, and cleaning performance is not good, and bigger to membrane damage, and the present invention adopts inorganic, organic complex cleaning agent can effectively be removed inorganic and organic dirt, and less to the infringement of film.
Description of drawings
Fig. 1 is the sketch map of the embodiment of the invention.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is further specified.
Embodiment 1
Preparation cleaning solution: use pure water allotment cleaning solution: 2% sodium phosphate trimer+0.5% sodium hydroxide solution+0.25% neopelex solution, put into cleaning fluid storage tank 3, be adjusted to temperature required: 25 ℃.
Referring to Fig. 1, reverse osmosis membrane is put into ultrasonic cleaner 1, and put into cleaning agent, ultrasonic frequency is adjusted to 60KHz, carry out ultrasonic waves for cleaning, scavenging period is 24h;
Reverse osmosis membrane after the ultrasonic waves for cleaning is packed in the reverse osmosis membrane pipe 6; In cleaning fluid storage tank 3, pack into and clean chemical agent A; Open the outlet valve b of cleaning fluid storage tank 3 and be arranged at valve d, e, f, the h that leads to reverse osmosis membrane pipe 6 pipelines; With the valve j, the l that are connected in reverse osmosis membrane pipe 6 export pipelines, open variable frequency water supply pump 4, keep-up pressure in 0.5MPa; Then open the valve c in the connecting line between variable frequency water supply pump 4 export pipelines and the cleaning fluid storage tank 3 like hypertonia, carry out the pressure adjustment;
Low discharge circulation for the first time: the global cycle scavenging period is 20 minutes, and the pressure vessel flow of every reverse osmosis membrane is: 50 liters/minute, the pollutant that the minimizing of trying one's best is washed is to the obstruction of intake tunnel;
Low discharge circulation for the second time: the global cycle scavenging period is 13 minutes, and the pressure vessel flow of every reverse osmosis membrane is: 90 liters/minute;
For the first time big flow circulation: the global cycle scavenging period is 55 minutes, and the pressure vessel flow of every reverse osmosis membrane is: 140 liters/minute;
Soak: with reverse osmosis membrane soaked overnight (for keeping the circular flow of temperature maintenance normal discharge 10%).The concentration of cleaning soup is controlled at 1%, and soak time is 2h; Soak afterflush: valve-off c, j, l, open valve i, k, open variable frequency water supply pump 4, use the pure water of not regulating in the pure water case 7 to wash repeatedly, guarantee that chemical cleaning solution, impurity are all washed out;
For the second time big flow circulation: the global cycle scavenging period is 55 minutes, and the pressure vessel flow of every reverse osmosis membrane is: 140 liters/minute;
Final flushing, valve-off c, j, l open valve i, k, open variable frequency water supply pump 4, use the pure water of not regulating in the pure water case 7 to wash repeatedly, guarantee that chemical cleaning solution is all washed out., cleaning fluid can also be disposed to storage box 8, reclaims or detects.
Embodiment 2
Preparation cleaning solution: use pure water allotment cleaning solution: 3% sodium phosphate trimer+0.2% sodium hydroxide solution+0.25% neopelex solution, put into cleaning fluid storage tank 3, be adjusted to temperature required: 25 ℃.
Reverse osmosis membrane is put into ultrasonic cleaner 1, and put into cleaning agent ultrasonic frequency is adjusted to 70KHz, carry out ultrasonic waves for cleaning, scavenging period is 36h.
Reverse osmosis membrane after the ultrasonic waves for cleaning is packed in the reverse osmosis membrane pipe 6, and the cleaning chemical agent of in cleaning fluid storage tank 3, packing into is opened valve b, d, e, f, h, j, l; Open variable frequency water supply pump 4; Keep-up pressure in 0.5MPa, then open valve c, carry out the pressure adjustment like hypertonia.
Low discharge circulation for the first time: the global cycle scavenging period is 20 minutes, and the pressure vessel flow of every reverse osmosis membrane is: 50 liters/minute, the pollutant that the minimizing of trying one's best is washed is to the obstruction of intake tunnel.
Low discharge circulation for the second time: the global cycle scavenging period is 15 minutes, and the pressure vessel flow of every reverse osmosis membrane is: 100 liters/minute.
For the first time big flow circulation: the global cycle scavenging period is 60 minutes, and the pressure vessel flow of every reverse osmosis membrane is: 140 liters/minute.
Soak: with reverse osmosis membrane soaked overnight (for keeping the circular flow of temperature maintenance normal discharge 10%).The concentration of cleaning soup is controlled at 2%, and soak time is 24h.Soak afterflush, valve-off c, j, l open valve i, k, open variable frequency water supply pump 4, use the pure water of not regulating in the pure water case 7 to wash repeatedly, guarantee that chemical cleaning solution is all washed out.
High flow capacity circulation for the second time: circulated 55 minutes, the pressure vessel flow of every reverse osmosis membrane is: 140 liters/minute.
Final flushing: use the pure water low-pressure washing, all washed out until cleaning fluid.
Preparation cleaning solution: use pure water allotment cleaning solution: 2% sodium phosphate trimer+0.25% sodium hydroxide solution+0.5% neopelex solution, put into cleaning fluid storage tank 3, be adjusted to temperature required: 25 ℃.
Reverse osmosis membrane is put into ultrasonic cleaner 1, and put into cleaning agent ultrasonic frequency is adjusted to 50KHz, carry out ultrasonic waves for cleaning, scavenging period is 12h.
Reverse osmosis membrane after the ultrasonic waves for cleaning is packed in the reverse osmosis membrane pipe 6, and the cleaning chemical agent of in cleaning fluid storage tank 3, packing into is opened valve b, d, e, f, h, j, l; Open variable frequency water supply pump 4; Keep-up pressure in 0.5MPa, then open valve c, carry out the pressure adjustment like hypertonia.
Low discharge circulation for the first time: the global cycle scavenging period is 20 minutes, and the pressure vessel flow of every reverse osmosis membrane is: 50 liters/minute, the pollutant that the minimizing of trying one's best is washed is to the obstruction of intake tunnel.
Low discharge circulation for the second time: the global cycle scavenging period is 15 minutes, and the pressure vessel flow of every reverse osmosis membrane is: 90 liters/minute.
For the first time big flow circulation: the global cycle scavenging period is 60 minutes, and the pressure vessel flow of every reverse osmosis membrane is: 140 liters/minute.
Soak: with reverse osmosis membrane soaked overnight (for keeping the circular flow of temperature maintenance normal discharge 10%).The concentration of cleaning soup is controlled at 2%, and soak time is 24h.Soak afterflush, valve-off c, j, l open valve i, k, open variable frequency water supply pump 4, use the pure water of not regulating in the pure water case 7 to wash repeatedly, guarantee that chemical cleaning solution is all washed out.
High flow capacity circulation for the second time: circulated 55 minutes, the pressure vessel flow of every reverse osmosis membrane is: 140 liters/minute.
The pure water low-pressure washing is used in final flushing, is all washed out until cleaning fluid.
Table 1 cleaning performance
In sum, the present invention has introduced ultrasound wave descaling and cleaned preconditioning technique on existing off-line cleaning technique, makes dirty thing under the effect of highdensity plywood power, and is broken rapidly, peel off and be cleaned.To of the damage of existing Chemical cleaning medicament, adopt organic and inorganic composite cleaning agent simultaneously, to the damage of film, prolong its service life when reducing Chemical cleaning film.
Claims (4)
1. reverse osmosis membrane off-line cleaning method, it comprises the steps:
1) preparation cleaning solution, cleaning solution composition percentage by weight is: sodium phosphate trimer 2 ~ 3%, sodium hydroxide solution 0.25 ~ 0.5%, neopelex solution 0.25 ~ 0.5%, all the other are pure water; PH value 10 ~ 13;
2) ultrasonic waves for cleaning is put into ultrasonic cleaner with reverse osmosis membrane, mixes above-mentioned cleaning soup again, through supersonic oscillations dirt is come off from the reverse osmosis membrane surface, and the ultrasonic waves for cleaning time is at 12 ~ 48h;
3) wash cycles
Reverse osmosis membrane is put into putamina, through supply-water pump the cleaning soup in the cleaning fluid storage tank is squeezed in the putamina, reverse osmosis membrane is cleaned, cleaning solution is recycled to the cleaning fluid storage tank, and the intake pressure of putamina is 0.3 ~ 0.5MPa;
Low discharge wash cycles, scavenging period are 30 ~ 35 minutes, and the pressure vessel flow of every reverse osmosis membrane is: 50 ~ 100 liters/minute;
High flow capacity wash cycles, scavenging period are 1 ~ 2 hour, and the pressure vessel flow of every reverse osmosis membrane is: 101 ~ 150 liters/minute;
4) flushing
Use the pure water low-pressure washing, pressure is 0.3 ~ 0.5MPa, and scavenging period is 20 ~ 30 minutes, guarantees that cleaning fluid and impurity are washed out.
2. reverse osmosis membrane off-line cleaning method as claimed in claim 1 is characterized in that, in the wash cycles process, after the low discharge wash cycles, reverse osmosis membrane is taked immersion treatment, and immersion is carried out the high flow capacity wash cycles, soak time 1～24 hour after finishing again; Soak the back reverse osmosis membrane is washed with pure water repeatedly, guarantee that cleaning fluid and impurity are washed out.
3. reverse osmosis membrane off-line cleaning method as claimed in claim 1 is characterized in that, described cleaning solution temperature is 25 ~ 30 ℃.
4. reverse osmosis membrane off-line cleaning method as claimed in claim 1 is characterized in that, the ultrasonic frequency 50 ~ 100KHz of described ultrasonic waves for cleaning.
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| CN2012102705830A CN102806016A (en) | 2012-07-31 | 2012-07-31 | Off-line cleaning method for reverse osmosis membranes |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103223298A (en) * | 2013-04-10 | 2013-07-31 | 杭州英普水处理技术有限公司 | Ultrasonic off-line cleaning apparatus and cleaning method of reverse osmosis membrane |
| CN104645834A (en) * | 2015-01-13 | 2015-05-27 | 浙江工业大学 | Method for cleaning membrane organic solvent pollutants |
| CN105561794A (en) * | 2015-08-13 | 2016-05-11 | 常州联江环保科技有限公司 | Method applicable to cleaning ultra-filtration membranes or reverse osmosis membranes |
| CN105709605A (en) * | 2015-08-13 | 2016-06-29 | 常州联江环保科技有限公司 | Alkaline cleaning agent and bactericide applicable to ultra-filtration membranes or reverse osmosis membranes |
| CN106630011A (en) * | 2015-11-04 | 2017-05-10 | 杭州天创环境科技股份有限公司 | Combined cleaning method of water reuse reverse osmosis system for printing and dyeing wastewater |
| CN106630324A (en) * | 2016-12-06 | 2017-05-10 | 苏州赛斯德工程设备有限公司 | Central water purification equipment and membrane system cleaning method thereof |
| CN108854559A (en) * | 2018-09-07 | 2018-11-23 | 华电水务膜分离科技（天津）有限公司 | Suitable for the ultrasonic cleaning equipment of hollow fiber film assembly, system and technique |
| CN111330449A (en) * | 2020-04-01 | 2020-06-26 | 天津鼎芯膜科技有限公司 | Method for cleaning and regenerating reverse osmosis membrane pollution |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2684953Y (en) * | 2003-07-10 | 2005-03-16 | 天津泰达新水源科技开发有限公司 | Ultrasound wave cleaning device of hollow fibre separation film |
| CN102284248A (en) * | 2011-06-07 | 2011-12-21 | 天津工业大学 | Ultrasonic membrane cleaning device and process |
| CN102407076A (en) * | 2011-10-11 | 2012-04-11 | 清远加多宝草本植物科技有限公司 | Membrane element cleaning agent in membrane separation industry |
| CN102527244A (en) * | 2012-01-10 | 2012-07-04 | 蓝星环境工程有限公司 | Cleaning method of reverse osmosis membrane |
-
2012
- 2012-07-31 CN CN2012102705830A patent/CN102806016A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2684953Y (en) * | 2003-07-10 | 2005-03-16 | 天津泰达新水源科技开发有限公司 | Ultrasound wave cleaning device of hollow fibre separation film |
| CN102284248A (en) * | 2011-06-07 | 2011-12-21 | 天津工业大学 | Ultrasonic membrane cleaning device and process |
| CN102407076A (en) * | 2011-10-11 | 2012-04-11 | 清远加多宝草本植物科技有限公司 | Membrane element cleaning agent in membrane separation industry |
| CN102527244A (en) * | 2012-01-10 | 2012-07-04 | 蓝星环境工程有限公司 | Cleaning method of reverse osmosis membrane |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103223298A (en) * | 2013-04-10 | 2013-07-31 | 杭州英普水处理技术有限公司 | Ultrasonic off-line cleaning apparatus and cleaning method of reverse osmosis membrane |
| CN104645834A (en) * | 2015-01-13 | 2015-05-27 | 浙江工业大学 | Method for cleaning membrane organic solvent pollutants |
| CN105561794A (en) * | 2015-08-13 | 2016-05-11 | 常州联江环保科技有限公司 | Method applicable to cleaning ultra-filtration membranes or reverse osmosis membranes |
| CN105709605A (en) * | 2015-08-13 | 2016-06-29 | 常州联江环保科技有限公司 | Alkaline cleaning agent and bactericide applicable to ultra-filtration membranes or reverse osmosis membranes |
| CN106630011A (en) * | 2015-11-04 | 2017-05-10 | 杭州天创环境科技股份有限公司 | Combined cleaning method of water reuse reverse osmosis system for printing and dyeing wastewater |
| CN106630324A (en) * | 2016-12-06 | 2017-05-10 | 苏州赛斯德工程设备有限公司 | Central water purification equipment and membrane system cleaning method thereof |
| CN108854559A (en) * | 2018-09-07 | 2018-11-23 | 华电水务膜分离科技（天津）有限公司 | Suitable for the ultrasonic cleaning equipment of hollow fiber film assembly, system and technique |
| CN111330449A (en) * | 2020-04-01 | 2020-06-26 | 天津鼎芯膜科技有限公司 | Method for cleaning and regenerating reverse osmosis membrane pollution |
| 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 |
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Application publication date: 20121205 |