CN103143261B - Cleaning agent composition and cleaning method for reverse osmosis membrane - Google Patents
Cleaning agent composition and cleaning method for reverse osmosis membrane Download PDFInfo
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Abstract
The invention relates to a cleaning agent composition, comprising an A agent and a B agent. The A agent and the B agent are stored independently. The A agent comprises a non-ionic surfactant and a dispersing agent, wherein the non-ionic surfactant is a fatty alcohol-polyoxyethylene ether; and the dispersing agent is selected at least one from an organic phosphonic acid, a poly-aspartic acid, a polyepoxysuccinic acid and a co-polymer and/or a homopolymer obtained by polymerization of at least one of an unsaturated organic acid, an unsaturated organic acid ester and an unsaturated organic acid anhydride. The B agent contains a foaming agent. The invention also relates to a method for cleaning a reverse osmosis membrane by using the above cleaning agent composition. A 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.In underground water, bacterium is little, and salt content is high, and iron ion exists with ferric iron and ferrous two kinds of forms, not easily crosses and filters.
Usually following several pollution modes is mainly contained using underground water (as phreatic water) as the counter-infiltration system at water source: (1) calcium carbonate, the blocking microporous passage of calcium phosphate deposit; (2) the blocking microporous passage of calcium sulfate class deposit; (3) metal oxide is at the blocking microporous passage of film surface deposition.
Experimental study shows, the contamination phenomenon that various different pollutant causes is different, such as, the deposit of calcium, its symptom is that salt rejection rate obviously declines, and system pressure drop increases, and system aquifer yield is slightly fallen; Metal oxide, its symptom is that salt rejection rate obviously declines, and system pressure drop obviously raises, 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, said composition comprises A agent and B agent, and A agent and B agent are independently preserved separately, A agent contains nonionic surface active agent and dispersant, described nonionic surface active agent is AEO, described dispersant is for being selected from organic phospho acid, poly-aspartic-acid, poly-epoxy succinic acid and by being selected from unsaturated organic acid, at least one in unsaturated organic acid ester and unsaturated organic acid acid anhydride is polymerized at least one in the copolymer and/or homopolymers obtained, described organic phospho acid contains hydroxyl, amino, one or more in carboxyl and sulfonic group, B agent contains blowing agent.
Present invention also offers a kind of method using above-mentioned cleansing composition to clean reverse osmosis membrane, the method comprises the following steps:
(1) described A agent is mixed with the cleaning fluid that pH value is 6-6.5;
(2) with the cleaning fluid of preparation in step (1), reverse osmosis membrane is cleaned, and in cleaning process, in this cleaning fluid, add described B agent.
In described cleansing composition of the present invention, the lipophile of the nonionic surface active agent in A agent is comparatively strong, can strengthen cleaning fluid to floatingization of organic matter and mud, 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, the nonionic surface active agent in A 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 the dispersant in A agent is dirt dispersion agent, there is excellent chelating dispersive property and higher calcium tolerance, cleaning, stable and dispersion can be played in cleaning process simultaneously, can cleaning performance be improved, and effectively can avoid secondary pollution.
In addition, in the process adopting the cleaning fluid cleaning reverse osmosis membrane prepared by A agent, in cleaning fluid, add the B agent containing blowing agent, blowing agent can generate gas, and the pollutant contributed on reverse osmosis membrane departs from film surface, thus can improve cleaning performance.
Therefore, the cleaning fluid be mixed with by described cleansing composition of the present invention can clean reverse osmosis membrane effectively, the reverse osmosis membrane be specially adapted to having microorgranic contaminant cleans, 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.
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 comprises A agent and B agent, and A agent and B agent are independently preserved separately,
A agent contains nonionic surface active agent and dispersant, described nonionic surface active agent is AEO, described dispersant is at least one in being selected from organic phospho acid, poly-aspartic-acid, poly-epoxy succinic acid and being polymerized the copolymer and/or homopolymers that obtain by least one be selected from unsaturated organic acid, unsaturated organic acid ester and unsaturated organic acid acid anhydride, described organic phospho acid contain in hydroxyl, amino, carboxyl and sulfonic group one or more;
B agent contains blowing agent.
In described A agent, the weight ratio of described nonionic surface active agent and described dispersant is preferably 1000: 1-40, is more preferably 1000: 2-10, is further preferably 1000: 3.5-6.5.
In the process that the reverse osmosis membrane with microorgranic contaminant is cleaned, better cleaning performance is shown for making 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.
Described organic phospho acid can be conventionally used as the various organic phospho acids of dirt dispersion agent for this area.Under preferable case, in order to reduce secondary pollution as far as possible, and ensure good cleaning performance, described organic phospho acid is preferably HEDP, ATMP, 2-phosphonate group-1,2,4-butane tricarboxylate, hydroxyethylidene diphosphonic acid guanidine-acetic acid, ethylene diamine tetra methylene phosphonic acid, diethylene triamine pentamethylene phosphonic, at least one in two phosphono and sulfonics, glycine two methylenephosphonic acid, glutamic acid two methylenephosphonic acid, sulfamic acid two methylenephosphonic acid and tarine two methylenephosphonic acid.
Poly-aspartic-acid can be commercially available the poly-aspartic acid product of various routines, its number-average molecular weight can be 1000-5000.Poly-aspartic acid product such as can purchased from Shandong Taihe Water Treatment Co., Ltd..
Poly-epoxy succinic acid can be the poly-epoxy succinic acid product of commercially available various routines, and its number-average molecular weight can be 400-1500.Poly-epoxy succinic acid product such as can purchased from Shandong Taihe Water Treatment Co., Ltd..
Described unsaturated organic acid is preferably at least one in (methyl) acrylic acid, maleic acid, the unsaturated sulfonic acid of C2-C10 and the unsaturated phosphonic acids of C3-C10.The unsaturated sulfonic acid of described C2-C10 can be the unsaturated sulfonic acid of various routine, and except alkyl, thiazolinyl and sulfonic group, can also contain phenyl, amide groups etc., the unsaturated sulfonic acid of described C2-C10 can be such as styrene sulfonic acid, allyl sulphonic acid, vinyl sulfonic acid, 2-methyl-2 '-acrylamido propane sulfonic acid, 2-acrylamide-2-methyl-propane sulfonic acid, 2-methyl-2 '-acrylamido propane sulfonic acid etc.The unsaturated phosphonic acids of described C3-C10 can be the unsaturated phosphonic acids of various routine, and except alkyl, thiazolinyl and phosphonate group, can also contain amide groups, and the unsaturated phosphonic acids of described C3-C10 can be such as 2-acrylamido-2-methylpropanephosphonic acid.
In the present invention, described unsaturated organic acid ester is the ester of above-mentioned unsaturated organic acid.Described unsaturated organic acid acid anhydride is the acid anhydrides of above-mentioned unsaturated organic acid.
Described copolymer and described homopolymers can be conventionally used as the organic polymer of dirt dispersion agent for this area, and its number-average molecular weight can be 300-10000, is preferably 300-6000.Under preferable case, described copolymer is (methyl) acrylic acid/(methyl) hydroxypropyl acrylate copolymer, (methyl) acrylic acid/(methyl) hydroxypropyl acrylate/(methyl) methyl acrylate copolymer, maleic acid/Styrene Sulfonic Acid Copolymer, maleic anhydride/Styrene Sulfonic Acid Copolymer, (methyl) acrylic acid/Styrene Sulfonic Acid Copolymer, (methyl) acrylate/Styrene Sulfonic Acid Copolymer, maleic acid/allyl sulphonic acid copolymer, maleic anhydride/allyl sulphonic acid copolymer, (methyl) acrylic acid/allyl sulphonic acid copolymer, (methyl) acrylic acid/vinyl sulfonic acid copolymer, (methyl) acrylic acid/2-methyl-2 '-acrylamido propane sulfonic acid copolymer, (methyl) acrylic acid/(methyl) hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer, (methyl) acrylic acid/acrylamide/2-methyl-2 '-acrylamido propane sulfonic acid copolymer, (methyl) acrylic acid/(methyl) acrylate/2-methyl-2 '-acrylamido propane sulfonic acid copolymer, (methyl) acrylic acid/maleic acid/2-methyl-2 '-acrylamido propane sulfonic acid copolymer and at least one in (methyl) acrylic acid/2-acrylamido-2-methylpropanephosphonic acid/2-methyl-2 '-acrylamido propane sulfonic acid copolymer, described homopolymers is poly-(methyl) acrylic acid and/or HPMA.
In a preferred embodiment, in order to improve cleaning performance further, to reduce the front and back pressure differential of reverse osmosis membrane further and to produce electrical conductivity of water, described dispersant is preferably the mixture of described organic phospho acid and described copolymer, and the weight ratio of described organic phosphoric acid and described copolymer is 1-2: 1.In this case, the weight ratio of described nonionic surface active agent and described dispersant is preferably 1000: 3.5-6.5.
Further preferably, when described dispersant is the mixture of described organic phospho acid and described copolymer, described organic phospho acid most preferably is 2-phosphonate group-1,2,4-butane tricarboxylate, described copolymer most preferably is (methyl) acrylic acid/(methyl) hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer.
In described B agent, described blowing agent can be the material that can generate gas under acid condition (if pH value is the condition of 6-6.5) of various routine, is preferably sodium acid carbonate.
Composition according to the present invention, can also contain deionized water in described A agent and B agent separately, they to be diluted to respectively the arbitrary concentration being applicable to storing or use.
Present invention also offers a kind of method using above-mentioned cleansing composition to clean reverse osmosis membrane, the method comprises the following steps:
(1) described A agent is mixed with the cleaning fluid that pH value is 6-6.5;
(2) with the cleaning fluid of preparation in step (1), reverse osmosis membrane is cleaned, and in cleaning process, in this cleaning fluid, add described B agent.
Method according to the present invention, described A agent is identical with above-described respectively with described B agent.
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, in step (2), relative to the described cleaning fluid of 100 weight portions, the consumption of described blowing agent can be 0.2-1.5 weight portion, is preferably 0.5-1 weight portion.
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 dispersant can be 30-200mg/L, is preferably 50-150mg/L.
Method according to the present invention, in step (1), 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.Under preferable case, be ammoniacal liquor for regulating the material of the pH value of described cleaning fluid.Under this preferable case, can prevent from forming slightly solubility material as ferrous citrate, thus reduce secondary pollution.
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, and in cleaning process, add blowing agent or the aqueous solution containing blowing agent lentamente;
(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.
(purchased from Shandong Taihe Water Treatment Co., Ltd., density is 1.272g/cm to take Lauryl Alcohol APEO (purchased from company of Jiangsu Hai'an Petrochemical Plant, trade mark E-1206) 2kg, 2-phosphonate group-1,2,4-butane tricarboxylate
3(20 DEG C)) 6g, acrylic acid/hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer (purchased from Shandong Taihe Water Treatment Co., Ltd., trade mark TH-613) 4g, adds 90kg deionized water, stirring makes it fully dissolve, and forms cleaning agent A1.
Take sodium acid carbonate 0.75kg, add 10kg deionized water, stir and make it fully dissolve, form foaming agent solution B1.
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) with ammoniacal liquor, the pH value of cleaning agent A1 is adjusted to 6.2, obtains cleaning fluid;
(2) 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;
(3) cleaning fluid of preparation in step (1) 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, slowly joined in described cleaning fluid by foaming agent solution B1 with 1 hours during this period, circulate complete immersion 4 hours;
(4) cleaning fluid is discharged;
(5) first-stage reverse osmosis film is rinsed 15 minutes with counter-infiltration product water;
(6) 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;
(7) cleaning fluid of preparation in step (1) 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, slowly joined in described cleaning fluid by foaming agent solution B1 with 1 hours during this period, circulate complete immersion 2 hours;
(8) cleaning fluid is discharged;
(9) two-pass reverse osmosis film is rinsed 15 minutes with counter-infiltration product water;
(10) 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 | 326.5 | 251.6 | 441.9 | 7.36 | 134.2 |
| Project | Dissolved oxygen | Positive phosphorus | Total iron | Sulfate | COD |
| Numerical value | 9.8 | 0.36 | 0.15 | 118.2 | 5 |
| Project | Electrical conductivity | Potassium ion | Suspension | Soluble solids | Ammonia nitrogen |
| Numerical value | 1108 | 3.4 | 4.0 | 724 | 0.606 |
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.
(purchased from Shandong Taihe Water Treatment Co., Ltd., density is 1.272g/cm to take ten four carbon alcohols APEOs (purchased from company of Jiangsu Hai'an Petrochemical Plant, trade mark E-1406) 4.5kg, 2-phosphonate group-1,2,4-butane tricarboxylate
3(20 DEG C)) 11g, acrylic acid/hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer (purchased from Shandong Taihe Water Treatment Co., Ltd., trade mark TH-613) 8g, adds 90kg deionized water, stirring makes it fully dissolve, and forms cleaning agent A2.With NaOH, the pH value of cleaning agent A2 is adjusted to 6.1, obtains cleaning fluid.
Take sodium acid carbonate 1.4kg, add 10kg deionized water, stir and make it fully dissolve, form foaming agent solution B2.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces cleaning agent and the foaming agent solution of use in embodiment 1 respectively with the above-mentioned cleaning fluid prepared by cleaning agent A2 and foaming agent solution B2.
Embodiment 3
The present embodiment is for illustration of the cleaning method of described cleansing composition of the present invention and reverse osmosis membrane.
(purchased from Shandong Taihe Water Treatment Co., Ltd., density is 1.272g/cm to take 16 carbon alcohol APEOs (purchased from company of Jiangsu Hai'an Petrochemical Plant, trade mark E-1606) 2.3kg, 2-phosphonate group-1,2,4-butane tricarboxylate
3(20 DEG C)) 8g, acrylic acid/hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer (purchased from Shandong Taihe Water Treatment Co., Ltd., trade mark TH-613) 6g, adds 90kg deionized water, stirring makes it fully dissolve, and forms cleaning agent A3.With NaOH, the pH value of cleaning agent A3 is adjusted to 6.1, obtains cleaning fluid.
Take sodium acid carbonate 0.9kg, add 10kg deionized water, stir and make it fully dissolve, form foaming agent solution B3.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces cleaning agent and the foaming agent solution of use in embodiment 1 respectively with the above-mentioned cleaning fluid prepared by cleaning agent A3 and foaming agent solution B3.
Embodiment 4
The present embodiment is for illustration of the cleaning method of described cleansing composition of the present invention and reverse osmosis membrane.
(purchased from Shandong Taihe Water Treatment Co., Ltd., density is 1.272g/cm to take octadecanol APEO (purchased from company of Jiangsu Hai'an Petrochemical Plant, trade mark E-1806) 1.6kg, 2-phosphonate group-1,2,4-butane tricarboxylate
3(20 DEG C)) 4g, acrylic acid/hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer (purchased from Shandong Taihe Water Treatment Co., Ltd., trade mark TH-613) 3g, adds 90kg deionized water, stirring makes it fully dissolve, and forms cleaning agent A4.With ammoniacal liquor, the pH value of cleaning agent A4 is adjusted to 6.3, obtains cleaning fluid.
Take sodium acid carbonate 0.6kg, add 10kg deionized water, stir and make it fully dissolve, form foaming agent solution B4.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces cleaning agent and the foaming agent solution of use in embodiment 1 respectively with the above-mentioned cleaning fluid prepared by cleaning agent A4 and foaming agent solution B4.
Embodiment 5
The present embodiment is for illustration of the cleaning method of described cleansing composition of the present invention and reverse osmosis membrane.
(purchased from Shandong Taihe Water Treatment Co., Ltd., density is 1.272g/cm to take ten four carbon alcohols APEOs (company of Jiangsu Hai'an Petrochemical Plant, trade mark E-1406) 0.7kg, 2-phosphonate group-1,2,4-butane tricarboxylate
3(20 DEG C)) 2g, acrylic acid/hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer (purchased from Shandong Taihe Water Treatment Co., Ltd., trade mark TH-613) 2g, adds 90kg deionized water, stirring makes it fully dissolve, and forms cleaning agent A5.With ammoniacal liquor, the pH value of cleaning agent A5 is adjusted to 6.4, obtains cleaning fluid.
Take sodium acid carbonate 0.3kg, add 10kg deionized water, stir and make it fully dissolve, form foaming agent solution B5.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces cleaning agent and the foaming agent solution of use in embodiment 1 respectively with the above-mentioned cleaning fluid prepared by cleaning agent A5 and foaming agent solution B5.
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 Lauryl Alcohol APEO (purchased from company of Jiangsu Hai'an Petrochemical Plant, trade mark E-1206) 2kg, (purchased from Shandong Taihe Water Treatment Co., Ltd., density is 1.345g/cm to take HEDP
3(20 DEG C)) 6g, glycine two methylenephosphonic acid (purchased from Shanghai Ao highland barley Industrial Co., Ltd., trade mark YSS-95 B840) 4g, adds 90kg deionized water, stirs and makes it fully dissolve, and forms cleaning agent A6.With KOH, the pH value of cleaning agent A6 is adjusted to 6.3, obtains cleaning fluid.
Take sodium acid carbonate 0.75kg, add 10kg deionized water, stir and make it fully dissolve, form foaming agent solution B6.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces cleaning agent and the foaming agent solution of use in embodiment 1 respectively with the above-mentioned cleaning fluid prepared by cleaning agent A6 and foaming agent solution B6.
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) 1.6kg, (purchased from Shandong Taihe Water Treatment Co., Ltd., density is 1.315g/cm to hydroxyethylidene diphosphonic acid guanidine-acetic acid
3(20 DEG C)) 3g, sulfamic acid two methylenephosphonic acid (purchased from Qingdao TianLan Power Industry Co., Ltd, trade mark TL-105) 4g, adds 90kg deionized water, stirs and makes it fully dissolve, and forms cleaning agent A7.With KOH, the pH value of cleaning agent A7 is adjusted to 6.3, obtains cleaning fluid.
Take sodium acid carbonate 0.6kg, add 10kg deionized water, stir and make it fully dissolve, form foaming agent solution B7.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces cleaning agent and the foaming agent solution of use in embodiment 1 respectively with the above-mentioned cleaning fluid prepared by cleaning agent A7 and foaming agent solution B7.
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) 2.3kg, (purchased from Shandong Taihe Water Treatment Co., Ltd., density is 1.405g/cm to diethylene triamine pentamethylene phosphonic
3(20 DEG C)) 8g, (purchased from Shandong Taihe Water Treatment Co., Ltd., density is 1.285g/cm to ATMP
3(20 DEG C)) 6g, add 90kg deionized water, stir and make it fully dissolve, form cleaning agent A8.With NaOH, the pH value of cleaning agent A8 is adjusted to 6.2, obtains cleaning fluid.
Take sodium acid carbonate 1.4kg, add 10kg deionized water, stir and make it fully dissolve, form foaming agent solution B8.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces cleaning agent and the foaming agent solution of use in embodiment 1 respectively with the above-mentioned cleaning fluid prepared by cleaning agent A8 and foaming agent solution B8.
Embodiment 9
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) 2kg, acrylic acid/hydroxypropyl acrylate/methyl acrylate copolymer is (purchased from Hangzhou Tuo Mu Science and Technology Ltd., trade mark lov166) 6g, maleic acid/Styrene Sulfonic Acid Copolymer (purchased from Langfang Jin Nuo biotechnology development corporation, Ltd., trade mark JNH-406) 4g, adds 90kg deionized water, stirring makes it fully dissolve, and forms cleaning agent A9.With ammoniacal liquor, the pH value of cleaning agent A9 is adjusted to 6.1, obtains cleaning fluid.
Take sodium acid carbonate 0.75kg, add 10kg deionized water, stir and make it fully dissolve, form foaming agent solution B9.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces cleaning agent and the foaming agent solution of use in embodiment 1 respectively with the above-mentioned cleaning fluid prepared by cleaning agent A9 and foaming agent solution B9.
Embodiment 10
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) 1.8kg, poly-aspartic-acid is (purchased from Shandong Taihe Water Treatment Co., Ltd., number-average molecular weight is 1000-5000) 3g, poly-epoxy succinic acid (purchased from Shandong Taihe Water Treatment Co., Ltd., number-average molecular weight is 400-1500) 4g, adds 90kg deionized water, stirring makes it fully dissolve, and forms cleaning agent A10.With KOH, the pH value of cleaning agent A10 is adjusted to 6.3, obtains cleaning fluid.
Take sodium acid carbonate 0.65kg, add 10kg deionized water, stir and make it fully dissolve, form foaming agent solution B10.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces cleaning agent and the foaming agent solution of use in embodiment 1 respectively with the above-mentioned cleaning fluid prepared by cleaning agent A10 and foaming agent solution B10.
Embodiment 11
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) 2.4kg, acrylic acid/hydroxypropyl acrylate/methyl acrylate copolymer is (purchased from purchased from Hangzhou Tuo Mu Science and Technology Ltd., trade mark lov166) 8g, maleic anhydride/Styrene Sulfonic Acid Copolymer (purchased from Langfang Jin Nuo biotechnology development corporation, Ltd., trade mark JNH-406) 6g, adds 90kg deionized water, stirring makes it fully dissolve, and forms cleaning agent A11.With KOH, the pH value of cleaning agent A11 is adjusted to 6.3, obtains cleaning fluid.
Take sodium acid carbonate 1.4kg, add 10kg deionized water, stir and make it fully dissolve, form foaming agent solution B11.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces cleaning agent and the foaming agent solution of use in embodiment 1 respectively with the above-mentioned cleaning fluid prepared by cleaning agent A11 and foaming agent solution B11.
Embodiment 12
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-1406) 2kg, glycine two methylenephosphonic acid is (purchased from Shanghai Ao highland barley Industrial Co., Ltd., trade mark YSS-95B840) 10g, add 90kg deionized water, stirring makes it fully dissolve, and forms cleaning agent A12.With NaOH, the pH value of cleaning agent A12 is adjusted to 6.1, obtains cleaning fluid.
Take sodium acid carbonate 0.75kg, add 10kg deionized water, stir and make it fully dissolve, form foaming agent solution B12.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces cleaning agent and the foaming agent solution of use in embodiment 1 respectively with the above-mentioned cleaning fluid prepared by cleaning agent A12 and foaming agent solution B12.
Embodiment 13
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) 1.7kg, (purchased from Shandong Taihe Water Treatment Co., Ltd., density is 1.356g/cm to ethylene diamine tetra methylene phosphonic acid
3(20 DEG C)) 8g, add 90kg deionized water, stir and make it fully dissolve, form cleaning agent A13.With NaOH, the pH value of cleaning agent A13 is adjusted to 6.1, obtains cleaning fluid.
Take sodium acid carbonate 0.65kg, add 10kg deionized water, stir and make it fully dissolve, form foaming agent solution B13.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces cleaning agent and the foaming agent solution of use in embodiment 1 respectively with the above-mentioned cleaning fluid prepared by cleaning agent A13 and foaming agent solution B13.
Embodiment 14
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) 2.2kg, two phosphono and sulfonic diformazan fork phosphonic acids are (purchased from the strong imperial fine chemistry industry head factory in Luoyang, trade mark LCH-104) 14g, add 90kg deionized water, stirring makes it fully dissolve, and forms cleaning agent A14.With NaOH, the pH value of cleaning agent A14 is adjusted to 6.1, obtains cleaning fluid.
Take sodium acid carbonate 0.8kg, add 10kg deionized water, stir and make it fully dissolve, form foaming agent solution B14.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces cleaning agent and the foaming agent solution of use in embodiment 1 respectively with the above-mentioned cleaning fluid prepared by cleaning agent A14 and foaming agent solution B14.
Embodiment 15
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) 2kg, acrylic acid/2-acrylamido-2-methylpropanephosphonic acid/2-methyl-2 '-acrylamido propane sulfonic acid copolymer is (purchased from precious ten thousand forge plants in Tong County, Beijing City, trade mark BF-204) 10g, add 90kg deionized water, stirring makes it fully dissolve, and forms cleaning agent A15.With ammoniacal liquor, the pH value of cleaning agent A15 is adjusted to 6.3, obtains cleaning fluid.
Take sodium acid carbonate 0.75kg, add 10kg deionized water, stir and make it fully dissolve, form foaming agent solution B15.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces cleaning agent and the foaming agent solution of use in embodiment 1 respectively with the above-mentioned cleaning fluid prepared by cleaning agent A15 and foaming agent solution B15.
Embodiment 16
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) 1.9kg, acrylic acid/acrylamide/2-methyl-2 '-acrylamido propane sulfonic acid copolymer is (purchased from Hubei Zo Tai Environment Technology Co., Ltd., trade mark ZT-207) 7g, add 90kg deionized water, stirring makes it fully dissolve, and forms cleaning agent A16.With ammoniacal liquor, the pH value of cleaning agent A16 is adjusted to 6.2, obtains cleaning fluid.
Take sodium acid carbonate 0.7kg, add 10kg deionized water, stir and make it fully dissolve, form foaming agent solution B16.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces cleaning agent and the foaming agent solution of use in embodiment 1 respectively with the above-mentioned cleaning fluid prepared by cleaning agent A16 and foaming agent solution B16.
Embodiment 17
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) 2.2kg, 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) 13g, add 90kg deionized water, stirring makes it fully dissolve, and forms cleaning agent A17.With ammoniacal liquor, the pH value of cleaning agent A17 is adjusted to 6.4, obtains cleaning fluid.
Take sodium acid carbonate 0.8kg, add 10kg deionized water, stir and make it fully dissolve, form foaming agent solution B17.
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, replaces cleaning agent and the foaming agent solution of use in embodiment 1 respectively with the above-mentioned cleaning fluid prepared by cleaning agent A17 and foaming agent solution B17.
Comparative example 1
Method according to embodiment 1 is cleaned the reverse osmosis membrane in two-stage two-segment counter-infiltration system, and difference is, in cleaning process, do not add described foaming agent solution.
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 (16)
1. a cleansing composition, is characterized in that, said composition comprises A agent and B agent, and A agent and B agent are independently preserved separately,
A agent contains nonionic surface active agent and dispersant, described nonionic surface active agent is AEO, described dispersant is at least one in being selected from organic phospho acid, poly-aspartic-acid, poly-epoxy succinic acid and being polymerized the copolymer and/or homopolymers that obtain by least one be selected from unsaturated organic acid, unsaturated organic acid ester and unsaturated organic acid acid anhydride, described organic phospho acid contain in hydroxyl, amino, carboxyl and sulfonic group one or more; In A agent, the weight ratio of described nonionic surface active agent and described dispersant is 1000:1-40;
B agent contains blowing agent.
2. composition according to claim 1, wherein, in A agent, the weight ratio of described nonionic surface active agent and described dispersant is 1000:2-10.
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 organic phospho acid is for being selected from HEDP, ATMP, 2-phosphonate group-1,2,4-butane tricarboxylate, hydroxyethylidene diphosphonic acid guanidine-acetic acid, ethylene diamine tetra methylene phosphonic acid, diethylene triamine pentamethylene phosphonic, at least one in two phosphono and sulfonics, glycine two methylenephosphonic acid, glutamic acid two methylenephosphonic acid, sulfamic acid two methylenephosphonic acid and tarine two methylenephosphonic acid.
6. composition according to claim 1, wherein, described unsaturated organic acid is at least one in (methyl) acrylic acid, maleic acid, the unsaturated sulfonic acid of C2-C10 and the unsaturated phosphonic acids of C3-C10; Described unsaturated organic acid ester is the ester of described unsaturated organic acid; Described unsaturated organic acid acid anhydride is the acid anhydrides of described unsaturated organic acid.
7. the composition according to claim 1 or 6, wherein, described copolymer is for being selected from (methyl) acrylic acid/(methyl) hydroxypropyl acrylate copolymer, (methyl) acrylic acid/(methyl) hydroxypropyl acrylate/(methyl) methyl acrylate copolymer, maleic acid/Styrene Sulfonic Acid Copolymer, maleic anhydride/Styrene Sulfonic Acid Copolymer, (methyl) acrylic acid/Styrene Sulfonic Acid Copolymer, (methyl) acrylate/Styrene Sulfonic Acid Copolymer, maleic acid/allyl sulphonic acid copolymer, maleic anhydride/allyl sulphonic acid copolymer, (methyl) acrylic acid/allyl sulphonic acid copolymer, (methyl) acrylic acid/vinyl sulfonic acid copolymer, (methyl) acrylic acid/2-methyl-2'-acrylamido propane sulfonic acid copolymer, (methyl) acrylic acid/(methyl) hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer, (methyl) acrylic acid/acrylamide/2-methyl-2'-acrylamido propane sulfonic acid copolymer, (methyl) acrylic acid/(methyl) acrylate/2-methyl-2'-acrylamido propane sulfonic acid copolymer, (methyl) acrylic acid/maleic acid/2-methyl-2'-acrylamido propane sulfonic acid copolymer and at least one in (methyl) acrylic acid/2-acrylamido-2-methylpropanephosphonic acid/2-methyl-2'-acrylamido propane sulfonic acid copolymer, described homopolymers is for being selected from poly-(methyl) acrylic acid and/or HPMA.
8. composition according to claim 1, wherein, in A agent, described dispersant is the mixture of described organic phospho acid and described copolymer, and the weight ratio of described organic phosphoric acid and described copolymer is 1-2:1.
9. composition according to claim 8, wherein, described organic phospho acid is 2-phosphonate group-1,2,4-butane tricarboxylate, described copolymer is (methyl) acrylic acid/(methyl) hydroxypropyl acrylate/2-acrylamide-2-methyl-propane sulfonic acid copolymer.
10. composition according to claim 8, wherein, described blowing agent is the material that can generate gas in acid condition.
11. compositions according to claim 10, wherein, described blowing agent is sodium acid carbonate.
12. 1 kinds of methods using the cleansing composition in claim 1-11 described in any one to clean reverse osmosis membrane, the method comprises the following steps:
(1) described A agent is mixed with the cleaning fluid that pH value is 6-6.5;
(2) with the cleaning fluid of preparation in step (1), reverse osmosis membrane is cleaned, and in cleaning process, in this cleaning fluid, add described B agent.
13. methods according to claim 12, wherein, in step (1), the concentration of the nonionic surface active agent in described cleaning fluid is 0.5-5 % by weight.
14. methods according to claim 13, wherein, in step (1), the concentration of the nonionic surface active agent in described cleaning fluid is 1.5-2.5 % by weight.
15. methods according to claim 12, wherein, in step (2), relative to the described cleaning fluid of 100 weight portions, the consumption of described blowing agent is 0.2-1.5 weight portion.
16. methods according to claim 15, wherein, in step (2), relative to the described cleaning fluid of 100 weight portions, the consumption of described blowing agent is 0.5-1 weight portion.
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| CN107824054A (en) * | 2017-11-22 | 2018-03-23 | 广东桑海环保有限公司 | A kind of reverse osmosis membrane cleaning agent and preparation method thereof |
| CN108821455A (en) * | 2018-06-28 | 2018-11-16 | 芜湖市棠华建材科技有限公司 | The dirt dispersion agent of gasification furnace ash water system |
| CN108854563A (en) * | 2018-06-28 | 2018-11-23 | 芜湖市棠华建材科技有限公司 | The dirt dispersion agent of reverse osmosis membrane |
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