CN103143264B - Cleaning agent composition and cleaning method for reverse osmosis membrane - Google Patents
Cleaning agent composition and cleaning method for reverse osmosis membrane Download PDFInfo
- Publication number
- CN103143264B CN103143264B CN201110402997.XA CN201110402997A CN103143264B CN 103143264 B CN103143264 B CN 103143264B CN 201110402997 A CN201110402997 A CN 201110402997A CN 103143264 B CN103143264 B CN 103143264B
- Authority
- CN
- China
- Prior art keywords
- reverse osmosis
- methyl
- osmosis membrane
- cleaning
- water
- 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.)
- Active
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Detergent Compositions (AREA)
Abstract
The invention relates to a cleaning agent composition, comprising a non-ionic surfactant and a dispersing agent, wherein the non-ionic surfactant is a fatty alcohol-polyoxyethylene ether; and the dispersing agent is a (methyl)acrylic homopolymer and/or a (methyl)acrylic acid copolymer. The invention also relates to a method for cleaning a reverse osmosis membrane by using the above cleaning agent composition. The method comprises the steps of preparing the cleaning agent composition into a cleaning liquid with a pH value of 10.5-11.5 and cleaning the reverse osmosis membrane by using the cleaning liquid. The cleaning liquid prepared by the cleaning agent composition can clean the reverse osmosis membrane effectively, makes water yield of a reverse osmosis system restore basically, and can significantly reduce front-and-back pressure difference of the reverse osmosis membrane and reduce conductivity of produced water.
Description
Technical field
The present invention relates to a kind of cleansing composition, and the method using this cleansing composition to clean reverse osmosis membrane.
Background technology
Along with global water pollutions and water shortage, the equipment-reverse osmosis desalination plant (RO) of water treatment from the end of the fifties U.S. develop rapidly after having made First high performance membrane.China adopts reverse osmosis desalination plant first the end of the seventies, but until the appearance of the new film of TFC-HR high desalination in 1993, just obtains large development.Counter-infiltration is a kind of function by means of permselectivity membrane, take pressure reduction as the membrane separation technique of power, and when system institute plus-pressure is greater than the osmotic pressure of solution, hydrone enters central tube through film through producing water flow passage, at one end flows out.The impurity (as ion, colloid, organic matter, bacterium) entered in water is trapped within the influent side of film, flows out, thus reach the object of isolation of purified from dense water water side.Reverse osmosis technology is compared with the technology such as traditional evaporimeter, electrodialysis, and have original characteristics and advantages, its total salt clearance is high, Water Sproading rate is high, simple to operate, facility compact, easy to maintenance, greatly can reduce labour intensity, improve operation level and the automaticity of whole water treatment technology, when with ion-exchange unit conbined usage, greatly can extend the regeneration period of ion-exchange unit, reduce the discharge capacity of soda acid, be conducive to saving water resource and environmental protect.At present, reverse osmosis technology has covered nearly all industrial department, is particularly widely used in the multiple fields such as concentrated of desalinization, pure water preparation, boiler feedwater, wastewater treatment and drinking-water, beverage and chemical products.
Because counter-infiltration is completely different from traditional filtration, the latter's water all passes through filtering layer, backwash is relied on to be removed from filtering layer by the dirt dammed, counter-infiltration is then make a part of water pass through film with the direction straight with costal fold, now salt and colloidal substance concentrate on film surface, rely on the dense water of the direction flowing parallel with film to be taken away by condensed matter.Reverse osmosis unit is after operation a period of time, and on film, dense water side can accumulate the materials such as colloid, metal oxide, bacterium, organic matter, incrustation scale, causes the problems such as the decline of system salt rejection rate, water yield reduction, pressure reduction increase, thus can form fouling membrane.Described fouling membrane refer to suspended solid in water, microorganism and dissolving salt because being concentrated, its concentration exceedes solubility product and generates unwanted deposit on the surface of the film, these pollutions can be caused by following reason: the 1) deposition (fouling) of inorganic matter, common pollutant is as CaCO
3, CaSO
4, Ca
3(PO
4)
2deng; 2) absorption of organic molecule; 3) deposition (colloid pollution) of particle, common particle is as iron hydroxide, aluminium hydroxide, silicon dioxide colloid etc.; 4) metal oxide deposition, common metal oxide is as iron oxide; 5) adhesion of microorganism and growth (microbial contamination), common microorganism is as bacterium, algae class.
The fouling membrane of reverse osmosis unit is slowly development, if do not taken measures in early days, pollutes the performance will damaging membrane component within the relatively short time.In the ordinary course of things, when counter-infiltration system occurs that following symptoms for the moment, show that reverse osmosis membrane is contaminated, should clean in time: under normal pressure, product water flow have dropped 10-15% compared with normal value; In order to maintain normal product water flow, the feed pressure after temperature correction adds 10-15%; Product water salt transmitance adds 10-15%.The water flux of reverse-osmosis membrane element is larger, and the rate of recovery is higher, then its film surface more vulnerable to pollution.Under normal operating conditions, all above-mentioned fouling membrane all will make the aquifer yield of reverse osmosis unit reduce, and pressure of supply water increases, and product water quality reduces, and adds the cleaning frequency of reverse osmosis unit, add and produce water rate use.Therefore, how to prevent or slow down reverse osmosis membrane and pollute, extend service life of film and the cleaning performance improving film has become one of important subject in current reverse osmosis technology.
In reverse osmosis unit running, dissimilar pollution usually occurs simultaneously, and influences each other, but knows little about it to the interaction between dissimilar pollution at present.The reverse osmosis unit used in various field, no matter how perfect it is, no matter also adopt the membrane component of which kind of type of which kind of manufacturer production, reverse osmosis unit is once put into operation, once feed liquid contacts with film, namely fouling membrane starts, final all needs cleans, and only cleaning frequency length is different.
The removal of general reverse osmosis unit pollutant is rinsed by physics and Chemical cleaning two kinds of methods realize.Usually, if reducing just has appearred in the water permeability of film, enabled production water, has carried out flushing 20-40 minute to film surface according to physical method under low pressure high flow rate, makes the water permeability of film obtain recovery to a certain extent; And be heavily polluted at reverse osmosis membrane, and when DeGrain with physical method cleaning, chemical method is usually adopted to clean.Needing to carry out chemical analysis to pollutant when adopting chemical method to clean, distinguishing the kind of pollutant, and selecting corresponding chemicals and formula according to different pollutants.
The surface of reverse osmosis membrane is easy to the pollution by foreign substance and produces dirt, and these foreign substances are present in RO water inlet in a variety of manners.Because various places source quality is different, the preprocess method adopted is not quite similar, so the pollutant on reverse osmosis membrane is also different.Surface water is affected by environment, complicated component is changeable, suspension, colloid, organic matter, microorganism are very many, and added again many inorganic, organic flocculants, flocculation aid, bactericide, reducing agent etc. in preprocessing process, so the reverse osmosis membrane of former hydromining surface water is easy to contaminated and pollutant is complicated and changeable.
Usually following several pollution modes is mainly contained using surface water as the counter-infiltration system at water source: (1) causes film surface contamination due to the deposition of dissolved organic matter; (2) film surface contamination is caused due to the absorption of various colloid; (3) because bacteria flora breeding causes to aquaporin and the blocking of film surface; (4) solid particle in feedwater blocks to aquaporin.
Experimental study shows, the contamination phenomenon that various different pollutant causes is different: various colloid, and its symptom is that salt rejection rate is in a slight decrease, and system pressure drop rises gradually, and system aquifer yield reduces gradually; Various organic sediment, its symptom is that salt rejection rate may reduce, and system pressure drop raises gradually, and system aquifer yield reduces gradually; Germ contamination, its symptom is that salt rejection rate may reduce, and system pressure drop obviously increases, and system aquifer yield obviously reduces.
Many chemical reagent to removal dirt and other deposits all effective.Chemical cleaning is in fact make selected chemical agent and deposit, dirt, corrosion product and affect flux rates and produce other pollutant reactions of water water quality, impels it to depart from film surface.Product four class that these chemical reagent can be divided into acid, alkali, chelating agent and manufacture by formula.The pollutant of fouling membrane is different, then the cleaning agent selected is different.Select a kind of suitable cleaning agent, can play a multiplier effect.
US4976876 discloses the cleaning program of a kind of method by regular backwash cleaning counter-infiltration system, but wherein and not mentioned Chemical cleaning part.US5499197 discloses a kind of automatic control scheme of counter-infiltration system, this cover counter-infiltration system is for the production of drinking water, the various indexs of water are produced by automatic control system monitoring, when the product water index monitored is defective, the prompting counter-infiltration system that can automatically give the alarm needs cleaning, and the running of counter-infiltration system can be stopped voluntarily when not getting effective washing, but wherein and not mentioned concrete cleaning program.
Summary of the invention
The object of this invention is to provide a kind of cleansing composition being applicable to that reverse osmosis membrane is cleaned, and adopt this cleansing composition to clean the method for reverse osmosis membrane.
The invention provides a kind of cleansing composition, wherein, said composition contains nonionic surface active agent and dispersant, described nonionic surface active agent is AEO, and described dispersant is (methyl) acrylate homopolymer and/or (methyl) acrylic copolymer.
Present invention also offers a kind of cleaning method of reverse osmosis membrane, the method comprises: above-mentioned cleansing composition is mixed with the cleaning fluid that pH value is 10.5-11.5, rinses with described cleaning fluid to reverse osmosis membrane.
In described cleansing composition of the present invention, described nonionic surface active agent can improve the wetability of cleaning agent, strengthens washing performance, increases the contact between chemical and dirt, and its lipophile is comparatively strong, can strengthen cleaning fluid to organic floatingization, solubilising and dispersion effect; And, because nonionic surface active agent does not exist with ionic condition in the solution, so its stability is higher, is not subject to the impact that strong electrolyte exists, is not subject to the impact of acid, alkali yet; In addition, described nonionic surface active agent has the feature of low foaming characteristic, the consumption of flushing water and washing time can be made to drop to minimum.Further, the AEO being used as nonionic surface active agent in the present invention all has good dissolubility in aqueous phase and oil phase, there is not strong adsorption on a solid surface, there is under low temperature good washing dirt-removing power, the requirement of the resistance to hard water of the low bubble of low temperature can be met; And the biodegradability of AEO is good, safety and environmental protection.
And described dispersant is dirt dispersion agent, there is excellent chelating dispersive property and higher calcium tolerance, can effectively prevent easily to become the example of dirt (as Ca
2+, PO
4 3-deng) deposition on reverse osmosis membrane surface, cleaning, stable and dispersion can be played simultaneously in cleaning process, therefore, it is possible to improve cleaning performance, and effectively can avoid secondary pollution.
In addition, in the cleaning method of described reverse osmosis membrane of the present invention, cleaning fluid is mixed with the alkaline solution that pH value is about 11, this cleaning fluid has good dissolubility to silica isocolloid material.
Therefore, the cleaning fluid be mixed with by described cleansing composition of the present invention can clean reverse osmosis membrane effectively, be specially adapted to the problem solving colloid and the organic matter class pollution that reverse osmosis membrane slowly occurs, the aquifer yield of counter-infiltration system is recovered substantially, significantly can reduce the front and back pressure differential of reverse osmosis membrane, and reduce product electrical conductivity of water.
Other features and advantages of the present invention are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Fig. 1 is the water treatment process figure of two-stage two-segment counter-infiltration system.
Detailed description of the invention
The invention provides a kind of cleansing composition, said composition contains nonionic surface active agent and dispersant, described nonionic surface active agent is AEO, and described dispersant is (methyl) acrylate homopolymer and/or (methyl) acrylic copolymer.
In described cleansing composition of the present invention, the weight ratio of described nonionic surface active agent and described dispersant can be 100-4500: 3, is preferably 375-1500: 3.
In the process that reverse osmosis membrane is cleaned, good cleaning performance is shown for making the cleaning fluid be mixed with by described cleansing composition, described AEO is preferably high-carbon fatty alcohol polyoxyethylene ether, be more preferably C10-C20 AEO, be further preferably at least one in Lauryl Alcohol APEO, ten four carbon alcohols APEOs, 16 carbon alcohol APEOs and octadecanol APEO.In the present invention, described AEO can be conventionally used as the commercially available prod of nonionic surface active agent for this area.
For described dispersant, the number-average molecular weight of described (methyl) acrylate homopolymer and (methyl) acrylic copolymer can be 300-10000 separately, is preferably 300-6000.Described (methyl) acrylic copolymer can be conventionally used as various (methyl) acrylic copolymer of dirt dispersion agent for this area, such as, described (methyl) acrylic copolymer can be bipolymer between (methyl) acrylic acid, (methyl) hydroxypropyl acrylate and 2-acrylamide-2-methyl-propane sulfonic acid and/or terpolymer.Preferably, described dispersant is at least one in (methyl) acrylic acid/(methyl) hydroxypropyl acrylate copolymer, (methyl) acrylic acid/2-acrylamide-2-methyl-propane sulfonic acid copolymer and (methyl) acrylic acid/(methyl) hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer.Most preferably, described dispersant is (methyl) acrylic acid/(methyl) hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer.
In more preferably embodiment, described nonionic surface active agent is Lauryl Alcohol APEO, and described dispersant is (methyl) acrylic acid/(methyl) hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer.In this preferred embodiment, described nonionic surface active agent and described dispersant can improve cleaning performance synergistically.
In the present invention, described cleansing composition can also contain deionized water, they to be diluted to respectively the arbitrary concentration being applicable to storing or use.
Present invention also offers a kind of cleaning method of reverse osmosis membrane, the method comprises: cleansing composition is mixed with the cleaning fluid that pH value is 10.5-11.5, rinses with described cleaning fluid to reverse osmosis membrane.
Method according to the present invention, described cleansing composition is identical with above-described.
The cleaning method of reverse osmosis membrane according to the present invention, its main improvements are to employ the cleaning fluid be mixed with by cleansing composition of the present invention, and the method for operating of concrete cleaning process and operating condition can be same or similar with the reverse osmosis membrane cleaning method of routine.
Method according to the present invention, because the alkali corrosion resistance of reverse osmosis membrane requires pH≤12, and the alkaline cleaning fluid that pH value is about 11 has good dissolubility to silica isocolloid material, therefore, in the present invention, the pH value of described cleaning fluid is controlled as 10.5-11.5.
Method according to the present invention, in order to ensure that described method of the present invention has good cleaning performance, the concentration usually described cleansing composition being diluted to nonionic surface active agent is 0.5-5 % by weight, is preferably 1.5-2.5 % by weight.In this case, the concentration of described dispersant can be 20-60mg/L, is preferably 30-40mg/L.
Method according to the present invention, for regulating the material of the pH value of described cleaning fluid to be the alkaline matter of various routine, such as, can be NaOH, KOH, ammoniacal liquor etc., be preferably NaOH and/or KOH.
In the present invention, described cleaning process is preferably carried out under lower operating pressure (as 0.4-0.6MPa) and larger dense water flux.Lower operating pressure can balance out the pressure drop from feedwater to dense water, and essentially no infiltration water produces, and can reduce booty precipitating again on film like this; Larger dense water flux can ensure more cleaning fluid and wash away reverse osmosis membrane surface, helpful for the pollutant removed on reverse osmosis membrane surface.
Usually, for reverse osmosis water treatment system, water temperature often improves 1 DEG C, and the permeability rate of reverse osmosis membrane can increase about 3%.In the process that reverse osmosis membrane is cleaned, after cleaning fluid is heated to certain temperature, while raising reverse osmosis membrane water permeability, can significantly improve cleaning fluid to the cleaning performance of reverse osmosis membrane; But due to the consideration of reverse osmosis membrane material and the scope of application, the temperature of cleaning fluid is no more than 50 DEG C.
As shown in Figure 1, for the water treatment procedure of two-stage two-segment counter-infiltration system, anti-penetration wastewater disposal process can comprise usually: Jiang Yuanshui carries out pretreatment, first-stage reverse osmosis membrane treatment appts will be injected through pretreated water by high-pressure pump to process, by the injection flush box of purifying waste water obtained after the process of first-stage reverse osmosis film, then inject two-pass reverse osmosis membrane treatment appts by high-pressure pump and carry out after-treatment, the pure water obtained after collecting process.Preferably, former water being carried out pretreated method can adopt conventional method to implement, such as, preprocess method can be included in former water and add flocculant (as aluminium polychloride), the pH value of the clear water obtained after flocculation is adjusted to 6-7, then adds clorox and carry out sterilization, then the water obtained is sent into manganese sand filter and filter, filter through more medium filter and active carbon filter again, add sodium hydrogensulfite afterwards and regulate water body oxidation-reduction potential to neutral.More preferably, before pretreated water injects first-stage reverse osmosis membrane treatment appts by high-pressure pump, antisludging agent (the Flocon135 antisludging agent as purchased from American Biglake chemical Corp) will added in pretreated water.
In the present invention, the cleaning method of described reverse osmosis membrane is applicable to the reverse osmosis membrane to various routine, is particularly applicable to clean PA membrane.When described reverse osmosis membrane is PA membrane, cleaning method according to the present invention can obtain excellent cleaning performance.
In the present invention, the cleaning process of described reverse osmosis membrane preferably includes washing, cleaning fluid washes and wash three steps.Concrete operating process as:
(1) rinse reverse osmosis membrane with water, preferably rinse 10-15 minute;
(2) above-mentioned cleaning fluid is added in reverse osmosis membrane processing device, wash cycles, preferably cleaning 1-2 hour;
(3) make cleaning fluid rest in reverse osmosis membrane processing device, reverse osmosis membrane is soaked, preferably soak 3-6 hour; Or often soak 20-30 minute, wash cycles 10-30 minute, and make the temporal summation of immersion and wash cycles be 1-6 hour;
(4) discharge cleaning fluid, then rinse reverse osmosis membrane with water, preferably rinse 10-40 minute.
The invention will be further described by the following examples.
Embodiment 1
The present embodiment is for illustration of the cleaning method of described cleansing composition of the present invention and reverse osmosis membrane.
Take Lauryl Alcohol APEO (purchased from company of Jiangsu Hai'an Petrochemical Plant, trade mark E-1206) 1kg, acrylic acid/hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer is (purchased from Shandong Taihe Water Treatment Co., Ltd., trade mark TH-613) 3.5g, add 70kg deionized water, stir and make it fully dissolve, adding deionized water to solution weight is 100kg, and be 11.0 by NaOH adjust ph, obtain cleaning fluid L1.
According to the process shown in Fig. 1, adopt two-stage two-segment counter-infiltration system to process the former water that water quality parameter is as shown in table 1, water treatment amount is 200L/h, until stop when the front and back pressure differential increase 20% of first-stage reverse osmosis film or pure water output reduce 20%.Then, the reverse osmosis membrane (PA membrane, purchased from Hydranautics Water Management Equipment Ltd., trade mark RE4021-TL) in two-stage two-segment counter-infiltration system is cleaned according to following process according to following:
(1) pressure of first-stage reverse osmosis film is adjusted to 0.4MPa, the dense aquatic products amount regulating first-stage reverse osmosis membrane treatment appts is 160L/h, and primary reverse osmosis water output is 40L/h, closes two-pass reverse osmosis membrane treatment appts.Rinse first-stage reverse osmosis film with counter-infiltration product water, rinse 12 minutes;
(2) described cleaning fluid L1 is added first-stage reverse osmosis membrane treatment appts, till displacing original liquid, make described first-stage reverse osmosis membrane treatment appts circular flow 2 hours, then soak 4 hours;
(3) cleaning fluid is discharged;
(4) first-stage reverse osmosis film is rinsed 15 minutes with counter-infiltration product water;
(5) first-stage reverse osmosis membrane treatment appts is closed.The pressure of two-pass reverse osmosis film is adjusted to 0.4MPa, and the dense aquatic products amount regulating two-pass reverse osmosis membrane treatment appts is 160L/h, and two-pass reverse osmosis aquatic products amount is 40L/h, rinses two-pass reverse osmosis film 12 minutes with counter-infiltration product water;
(6) described cleaning fluid L1 is added two-pass reverse osmosis membrane treatment appts, till displacing original liquid, make described two-pass reverse osmosis membrane treatment appts circular flow 1.5 hours, then soak 2 hours;
(7) cleaning fluid is discharged;
(8) two-pass reverse osmosis film is rinsed 15 minutes with counter-infiltration product water;
(9) first-stage reverse osmosis membrane treatment appts and two-pass reverse osmosis membrane treatment appts are opened simultaneously, keep the pressure 0.4MPa of first-stage reverse osmosis film, the pressure of two-pass reverse osmosis film is 0.6MPa, discharges after 20 minutes with counter-infiltration product water circulation cleaning counter-infiltration system.
Table 1
| Project | Calcium ion | Total alkalinity | Total hardness | pH | Chlorion |
| Numerical value | 170.4 | 189.5 | 260.3 | 7.82 | 35.7 |
| Project | Dissolved oxygen | Positive phosphorus | Total iron | Sulfate | COD |
| Numerical value | 9.9 | 0.72 | 0.08 | 46.9 | 13 |
| Project | Electrical conductivity | Potassium ion | Suspension | Soluble solids | Ammonia nitrogen |
| Numerical value | 598 | 2.2 | 4.2 | 327 | 1.973 |
Note: the unit of electrical conductivity is μ s/cm, the unit of all the other parameters is mg/L.
Embodiment 2
The present embodiment is for illustration of the cleaning method of described cleansing composition of the present invention and reverse osmosis membrane.
Take Lauryl Alcohol APEO (purchased from company of Jiangsu Hai'an Petrochemical Plant, trade mark E-1206) 2.7kg, acrylic acid/hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer is (purchased from Shandong Taihe Water Treatment Co., Ltd., trade mark TH-613) 5.5g, add 70kg deionized water, stir and make it fully dissolve, adding deionized water to solution weight is 100kg, and be 11.2 by KOH adjust ph, obtain cleaning fluid L2.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces the cleaning fluid L1 used in embodiment 1 with cleaning fluid L2.
Embodiment 3
The present embodiment is for illustration of the cleaning method of described cleansing composition of the present invention and reverse osmosis membrane.
Take Lauryl Alcohol APEO (purchased from company of Jiangsu Hai'an Petrochemical Plant, trade mark E-1206) 1.3kg, acrylic acid/hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer is (purchased from Shandong Taihe Water Treatment Co., Ltd., trade mark TH-613) 3.9g, add 70kg deionized water, stir and make it fully dissolve, adding deionized water to solution weight is 100kg, and be 11.4 by NaOH adjust ph, obtain cleaning fluid L3.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces the cleaning fluid L1 used in embodiment 1 with cleaning fluid L3.
Embodiment 4
The present embodiment is for illustration of the cleaning method of described cleansing composition of the present invention and reverse osmosis membrane.
Take Lauryl Alcohol APEO (purchased from company of Jiangsu Hai'an Petrochemical Plant, trade mark E-1206) 0.7kg, acrylic acid/hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer is (purchased from Shandong Taihe Water Treatment Co., Ltd., trade mark TH-613) 3.1g, add 70kg deionized water, stir and make it fully dissolve, adding deionized water to solution weight is 100kg, and be 11.3 by KOH adjust ph, obtain cleaning fluid L4.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces the cleaning fluid L1 used in embodiment 1 with cleaning fluid L4.
Embodiment 5
The present embodiment is for illustration of the cleaning method of described cleansing composition of the present invention and reverse osmosis membrane.
Take Lauryl Alcohol APEO (purchased from company of Jiangsu Hai'an Petrochemical Plant, trade mark E-1206) 0.4kg, acrylic acid/hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer is (purchased from Shandong Taihe Water Treatment Co., Ltd., trade mark TH-613) 2.2g, add 70kg deionized water, stir and make it fully dissolve, adding deionized water to solution weight is 100kg, and be 10.6 by NaOH adjust ph, obtain cleaning fluid L5.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces the cleaning fluid L1 used in embodiment 1 with cleaning fluid L5.
Embodiment 6
The present embodiment is for illustration of the cleaning method of described cleansing composition of the present invention and reverse osmosis membrane.
Take ten four carbon alcohols APEOs (purchased from company of Jiangsu Hai'an Petrochemical Plant, trade mark E-1406) 0.9kg, hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer is (purchased from Shandong Taihe Water Treatment Co., Ltd., trade mark TH-613) 3.6g, add 70kg deionized water, stir and make it fully dissolve, adding deionized water to solution weight is 100kg, and be 10.7 by KOH adjust ph, obtain cleaning fluid L6.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces the cleaning fluid L1 used in embodiment 1 with cleaning fluid L6.
Embodiment 7
The present embodiment is for illustration of the cleaning method of described cleansing composition of the present invention and reverse osmosis membrane.
Take 16 carbon alcohol APEOs (purchased from company of Jiangsu Hai'an Petrochemical Plant, trade mark E-1606) 0.8kg, acrylic acid/hydroxypropyl acrylate copolymer is (purchased from Shandong Taihe Water Treatment Co., Ltd., trade mark T225) 3.7g, add 70kg deionized water, stir and make it fully dissolve, adding deionized water to solution weight is 100kg, and be 10.9 by NaOH adjust ph, obtain cleaning fluid L7.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces the cleaning fluid L1 used in embodiment 1 with cleaning fluid L7.
Embodiment 8
The present embodiment is for illustration of the cleaning method of described cleansing composition of the present invention and reverse osmosis membrane.
Take octadecanol APEO (purchased from company of Jiangsu Hai'an Petrochemical Plant, trade mark E-1806) 1.1kg, polyacrylic acid is (purchased from Shandong Taihe Water Treatment Co., Ltd., trade mark PAA) 3.4g, add 70kg deionized water, stir and make it fully dissolve, adding deionized water to solution weight is 100kg, and be 10.8 by NaOH adjust ph, obtain cleaning fluid L8.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces the cleaning fluid L1 used in embodiment 1 with cleaning fluid L8.
Comparative example 1
Take Lauryl Alcohol APEO (purchased from company of Jiangsu Hai'an Petrochemical Plant, trade mark E-1206) 2kg, add 70kg deionized water, stirring makes it fully dissolve, adding deionized water to solution weight is 100kg, and is 11.0 by NaOH adjust ph, obtains cleaning fluid DL1.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces the cleaning fluid L1 used in embodiment 1 with cleaning fluid DL1.
Comparative example 2
Take acrylic acid/hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer (purchased from Shandong Taihe Water Treatment Co., Ltd., trade mark TH-613) 5.5g, add 70kg deionized water, stirring makes it fully dissolve, adding deionized water to solution weight is 100kg, and be 11.0 by NaOH adjust ph, obtain cleaning fluid DL2.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces the cleaning fluid L1 used in embodiment 1 with cleaning fluid DL2.
Test case
At above-mentioned two-stage two-segment counter-infiltration system after cleaning, according to the process shown in Fig. 1, the former water as shown in table 1 to water quality parameter processes again, and water treatment amount is 200L/h.During process, the performance indications of first-stage reverse osmosis film and two-pass reverse osmosis film are as shown in table 2 below again.
Table 2
Note: the unit of pure water flow, concentrated stream amount is L/h, and pressure drop unit is MPa, and electrical conductivity unit is μ s/cm.
As can be seen from Table 2, the cleaning fluid be mixed with by described cleansing composition of the present invention can clean reverse osmosis membrane effectively, the aquifer yield of counter-infiltration system is recovered substantially, significantly can reduce the front and back pressure differential of reverse osmosis membrane, and reduce product electrical conductivity of water.
Claims (9)
1. one kind is applicable to the cleansing composition that cleans reverse osmosis membrane, it is characterized in that, said composition contains nonionic surface active agent and dispersant, described nonionic surface active agent is AEO, described dispersant is (methyl) acrylate homopolymer and/or (methyl) acrylic copolymer, wherein, the weight ratio of described nonionic surface active agent and described dispersant is 100-4500:3.
2. composition according to claim 1, wherein, the weight ratio of described nonionic surface active agent and described dispersant is 375-1500:3.
3. composition according to claim 1 and 2, wherein, described AEO is C10-C20 AEO.
4. composition according to claim 3, wherein, described AEO is be selected from least one in Lauryl Alcohol APEO, ten four carbon alcohols APEOs, 16 carbon alcohol APEOs and octadecanol APEO.
5. composition according to claim 1 and 2, wherein, described (methyl) acrylic copolymer is bipolymer between (methyl) acrylic acid, (methyl) hydroxypropyl acrylate and 2-acrylamide-2-methyl-propane sulfonic acid and/or terpolymer.
6. composition according to claim 5, wherein, described (methyl) acrylic copolymer is at least one in (methyl) acrylic acid/(methyl) hydroxypropyl acrylate copolymer, (methyl) acrylic acid/2-acrylamide-2-methyl-propane sulfonic acid copolymer and (methyl) acrylic acid/(methyl) hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer.
7. composition according to claim 1 and 2, wherein, described nonionic surface active agent is Lauryl Alcohol APEO, and described dispersant is (methyl) acrylic acid/(methyl) hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer.
8. a cleaning method for reverse osmosis membrane, the method comprises: the cleansing composition in claim 1-7 described in any one is mixed with the cleaning fluid that pH value is 10.5-11.5, rinses with described cleaning fluid to reverse osmosis membrane.
9. method according to claim 8, wherein, in described cleaning fluid, the concentration of nonionic surface active agent is 0.5-5 % by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110402997.XA CN103143264B (en) | 2011-12-07 | 2011-12-07 | Cleaning agent composition and cleaning method for reverse osmosis membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110402997.XA CN103143264B (en) | 2011-12-07 | 2011-12-07 | Cleaning agent composition and cleaning method for reverse osmosis membrane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103143264A CN103143264A (en) | 2013-06-12 |
| CN103143264B true CN103143264B (en) | 2015-07-22 |
Family
ID=48541740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110402997.XA Active CN103143264B (en) | 2011-12-07 | 2011-12-07 | Cleaning agent composition and cleaning method for reverse osmosis membrane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103143264B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109251583B (en) * | 2018-09-26 | 2021-08-10 | 河南海利未来科技有限公司 | Plastic deinking agent for woven bags |
| CN112029592B (en) * | 2020-07-25 | 2021-09-28 | 上海宝聚表面技术有限公司 | Alkaline cleaning agent for hollow fiber ultrafiltration membrane and preparation method and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5279756A (en) * | 1992-08-27 | 1994-01-18 | Church & Dwight Co., Inc. | Non-phosphate machine dishwashing detergents |
| CA2292256A1 (en) * | 1998-12-23 | 2000-06-23 | Henkel Kommanditgesellschaft Auf Aktien | A multiphase cleaning composition containing alkoxylated aromatic dihydroxy compound |
| DE102004040848A1 (en) * | 2004-08-23 | 2006-03-02 | Henkel Kgaa | Cleaner with faecal dirt repellent properties |
| CN1796309A (en) * | 2004-12-30 | 2006-07-05 | 中国石化北京燕化石油化工股份有限公司 | Composite agent for anti water incrustation in use for reverse osmosis system and application |
| CN1837341A (en) * | 2006-03-15 | 2006-09-27 | 江苏久吾高科技股份有限公司 | Cleaning agent for ceramic film and its preparation method |
| US20100257676A1 (en) * | 2007-06-04 | 2010-10-14 | Ecolab Inc. | Liquid membrane compatible detergent formulation comprising branched alkoxylated fatty alcohols as non-ionic surfactants |
-
2011
- 2011-12-07 CN CN201110402997.XA patent/CN103143264B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5279756A (en) * | 1992-08-27 | 1994-01-18 | Church & Dwight Co., Inc. | Non-phosphate machine dishwashing detergents |
| CA2292256A1 (en) * | 1998-12-23 | 2000-06-23 | Henkel Kommanditgesellschaft Auf Aktien | A multiphase cleaning composition containing alkoxylated aromatic dihydroxy compound |
| DE102004040848A1 (en) * | 2004-08-23 | 2006-03-02 | Henkel Kgaa | Cleaner with faecal dirt repellent properties |
| CN1796309A (en) * | 2004-12-30 | 2006-07-05 | 中国石化北京燕化石油化工股份有限公司 | Composite agent for anti water incrustation in use for reverse osmosis system and application |
| CN1837341A (en) * | 2006-03-15 | 2006-09-27 | 江苏久吾高科技股份有限公司 | Cleaning agent for ceramic film and its preparation method |
| US20100257676A1 (en) * | 2007-06-04 | 2010-10-14 | Ecolab Inc. | Liquid membrane compatible detergent formulation comprising branched alkoxylated fatty alcohols as non-ionic surfactants |
Non-Patent Citations (1)
| Title |
|---|
| 反渗透膜的清洗;徐晓莉，尹连庆;《陶瓷研究与职业教育》;20051231;第3卷(第3期);27-28页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103143264A (en) | 2013-06-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103143260B (en) | Cleaning agent composition and cleaning method for reverse osmosis membrane | |
| CN102285705B (en) | Method for cleaning reverse osmosis system | |
| CN103143262B (en) | Cleaning agent composition and cleaning method for reverse osmosis membrane | |
| CN107261854B (en) | Method for cleaning membrane in leachate treatment process | |
| CN102284247A (en) | Method for cleaning reverse osmosis system | |
| CN101209886B (en) | Advanced treatment recycling technique of urban sewage | |
| CN102491564B (en) | Comprehensive recycling technology for mine water with high suspended matter content and high mineralization degree | |
| CN103143263B (en) | Cleaning agent composition and cleaning method for reverse osmosis membrane | |
| CN103143261B (en) | Cleaning agent composition and cleaning method for reverse osmosis membrane | |
| CN201610402U (en) | Recycling and deep treatment device for electronic electroplating wastewater | |
| CN109499378B (en) | Cleaning method for organic dirt blockage of hollow fiber ultrafiltration membrane | |
| CN103143264B (en) | Cleaning agent composition and cleaning method for reverse osmosis membrane | |
| CN104071925A (en) | Zero-drainage treatment system and zero-drainage treatment method for nickel plating wastewater in steel workshop | |
| CN110215846A (en) | A kind of cleaning agent and cleaning method handling reverse osmosis concentrated water plate nanofiltration membrane | |
| CN113045059A (en) | Treatment system and treatment process for realizing zero discharge of wastewater by full-membrane method | |
| MX2008000564A (en) | Extended-life water softening system, apparatus and method. | |
| CN112694182A (en) | Anti-sedimentation mine water purification treatment system | |
| CN116655172A (en) | Reverse osmosis-based electric power light sewage and wastewater treatment system and process | |
| CN211972038U (en) | CNC waste water zero discharge system | |
| CN112759116A (en) | Contain FEP waste water recovery processing system | |
| CN103183422A (en) | Treatment process for heavy metal wastewater | |
| CN103418248B (en) | Cleaning liquid composition and reverse osmosis membrane cleaning method | |
| CN220432572U (en) | Central water purifying equipment with TDS sensing micro-discharge function | |
| CN201223775Y (en) | Permeable membrane cleaning system of one-stage type hyperfiltration filtration device | |
| CN205313250U (en) | Circulative cooling arranges sewage treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |