CN117563425A - Membrane cleaning agent and preparation and use methods thereof - Google Patents
Membrane cleaning agent and preparation and use methods thereof Download PDFInfo
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- CN117563425A CN117563425A CN202311701457.0A CN202311701457A CN117563425A CN 117563425 A CN117563425 A CN 117563425A CN 202311701457 A CN202311701457 A CN 202311701457A CN 117563425 A CN117563425 A CN 117563425A
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- 239000012459 cleaning agent Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000012528 membrane Substances 0.000 title abstract description 73
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 239000006210 lotion Substances 0.000 claims abstract description 116
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 86
- 238000004140 cleaning Methods 0.000 claims abstract description 54
- 102000004190 Enzymes Human genes 0.000 claims abstract description 43
- 108090000790 Enzymes Proteins 0.000 claims abstract description 43
- 239000007800 oxidant agent Substances 0.000 claims abstract description 27
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 21
- 239000003899 bactericide agent Substances 0.000 claims abstract description 21
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 18
- 239000010703 silicon Substances 0.000 claims abstract description 18
- 239000004094 surface-active agent Substances 0.000 claims abstract description 15
- 239000003513 alkali Substances 0.000 claims abstract description 13
- 239000013530 defoamer Substances 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 239000002270 dispersing agent Substances 0.000 claims abstract description 11
- 230000000149 penetrating effect Effects 0.000 claims abstract description 11
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 6
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims abstract description 4
- 150000004679 hydroxides Chemical class 0.000 claims abstract description 4
- 230000001590 oxidative effect Effects 0.000 claims description 13
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 11
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 11
- 229910052794 bromium Inorganic materials 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 8
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 8
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 8
- 108091005804 Peptidases Proteins 0.000 claims description 7
- 108010059820 Polygalacturonase Proteins 0.000 claims description 7
- 239000004365 Protease Substances 0.000 claims description 7
- 108010093305 exopolygalacturonase Proteins 0.000 claims description 7
- 108010002430 hemicellulase Proteins 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910019142 PO4 Inorganic materials 0.000 claims description 4
- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 claims description 4
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 claims description 4
- 229920000141 poly(maleic anhydride) Polymers 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 108010084185 Cellulases Proteins 0.000 claims description 3
- 102000005575 Cellulases Human genes 0.000 claims description 3
- 108010026132 Gelatinases Proteins 0.000 claims description 3
- 102000013382 Gelatinases Human genes 0.000 claims description 3
- 102000035195 Peptidases Human genes 0.000 claims description 3
- 150000002191 fatty alcohols Chemical class 0.000 claims description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- JHWIEAWILPSRMU-UHFFFAOYSA-N 2-methyl-3-pyrimidin-4-ylpropanoic acid Chemical compound OC(=O)C(C)CC1=CC=NC=N1 JHWIEAWILPSRMU-UHFFFAOYSA-N 0.000 claims description 2
- 206010004542 Bezoar Diseases 0.000 claims description 2
- 235000021314 Palmitic acid Nutrition 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims description 2
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 2
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 2
- 239000000194 fatty acid Substances 0.000 claims description 2
- 229930195729 fatty acid Natural products 0.000 claims description 2
- 229960005102 foscarnet Drugs 0.000 claims description 2
- ZJAOAACCNHFJAH-UHFFFAOYSA-N hydroxycarbonylphosphonic acid Natural products OC(=O)P(O)(O)=O ZJAOAACCNHFJAH-UHFFFAOYSA-N 0.000 claims description 2
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 claims description 2
- 238000004806 packaging method and process Methods 0.000 claims description 2
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 2
- QDWYPRSFEZRKDK-UHFFFAOYSA-M sodium;sulfamate Chemical compound [Na+].NS([O-])(=O)=O QDWYPRSFEZRKDK-UHFFFAOYSA-M 0.000 claims description 2
- 125000000542 sulfonic acid group Chemical group 0.000 claims description 2
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims 1
- 238000001223 reverse osmosis Methods 0.000 abstract description 65
- 230000000694 effects Effects 0.000 abstract description 25
- 230000000903 blocking effect Effects 0.000 abstract description 21
- 229940088598 enzyme Drugs 0.000 description 40
- 230000000052 comparative effect Effects 0.000 description 26
- 239000010865 sewage Substances 0.000 description 19
- 239000000306 component Substances 0.000 description 15
- FJKROLUGYXJWQN-UHFFFAOYSA-M 4-hydroxybenzoate Chemical compound OC1=CC=C(C([O-])=O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-M 0.000 description 14
- 239000002245 particle Substances 0.000 description 12
- 238000011065 in-situ storage Methods 0.000 description 7
- UUIVKBHZENILKB-UHFFFAOYSA-N 2,2-dibromo-2-cyanoacetamide Chemical group NC(=O)C(Br)(Br)C#N UUIVKBHZENILKB-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000005406 washing Methods 0.000 description 5
- 108010059892 Cellulase Proteins 0.000 description 4
- 102100037486 Reverse transcriptase/ribonuclease H Human genes 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229940106157 cellulase Drugs 0.000 description 4
- 239000000084 colloidal system Substances 0.000 description 4
- 230000001804 emulsifying effect Effects 0.000 description 4
- 229940059442 hemicellulase Drugs 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000813 microbial effect Effects 0.000 description 4
- 102000004169 proteins and genes Human genes 0.000 description 4
- 108090000623 proteins and genes Proteins 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 3
- 229920000877 Melamine resin Polymers 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 239000012670 alkaline solution Substances 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000004925 denaturation Methods 0.000 description 3
- 230000036425 denaturation Effects 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 235000021317 phosphate Nutrition 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N propylene glycol Substances CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 241000195493 Cryptophyta Species 0.000 description 2
- 241000233866 Fungi Species 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 238000009395 breeding Methods 0.000 description 2
- 230000001488 breeding effect Effects 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 210000000170 cell membrane Anatomy 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000003834 intracellular effect Effects 0.000 description 2
- 231100000053 low toxicity Toxicity 0.000 description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000000241 respiratory effect Effects 0.000 description 2
- 230000027756 respiratory electron transport chain Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000002210 silicon-based material Substances 0.000 description 2
- UEUXEKPTXMALOB-UHFFFAOYSA-J tetrasodium;2-[2-[bis(carboxylatomethyl)amino]ethyl-(carboxylatomethyl)amino]acetate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O UEUXEKPTXMALOB-UHFFFAOYSA-J 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 150000007974 melamines Chemical class 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- YGSDEFSMJLZEOE-UHFFFAOYSA-M salicylate Chemical compound OC1=CC=CC=C1C([O-])=O YGSDEFSMJLZEOE-UHFFFAOYSA-M 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- FEJQDYXPAQVBCA-UHFFFAOYSA-J tetrasodium;ethane-1,2-diamine;tetraacetate Chemical group [Na+].[Na+].[Na+].[Na+].CC([O-])=O.CC([O-])=O.CC([O-])=O.CC([O-])=O.NCCN FEJQDYXPAQVBCA-UHFFFAOYSA-J 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
- B01D65/06—Membrane cleaning or sterilisation ; Membrane regeneration with special washing compositions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/164—Use of bases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/166—Use of enzymatic agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/168—Use of other chemical agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/42—Chemical regeneration
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cosmetics (AREA)
Abstract
The application relates to a membrane cleaning agent and a preparation and use method thereof, wherein the membrane cleaning agent comprises the following components in percentage by mass: the first lotion and the second lotion of (1.6-1.9); the first lotion comprises the following components in percentage by weight: 20-24% of a builder, 10-16% of a penetrating agent, 3-5% of a non-silicon defoamer and the balance of water; the builder comprises the following components in percentage by mass: (0.4-0.6) a treating enzyme and an oxidizing agent; the second lotion comprises the following components in parts by weight: 1-5% of inorganic alkali regulator, 5-10% of surfactant, 10-12% of bactericide, 10-12% of dispersing agent, 3-5% of non-silicon defoaming agent and the balance of water; the inorganic alkali lotion comprises the following components in percentage by mass: (0.6-0.8) hydroxides and carbonates. The cleaning effect to the dirt blocking object deposited on the reverse osmosis membrane can be improved.
Description
Technical Field
The application relates to the field of membrane cleaning agents, in particular to a membrane cleaning agent and a preparation method and a use method thereof.
Background
Reverse osmosis, also known as reverse osmosis, is a membrane separation operation that separates solvent from solution using pressure differential as a driving force, and is commonly applied to membrane sewage treatment systems. The reverse osmosis membrane is an artificial semipermeable membrane with certain characteristics, which is made of a simulated biological semipermeable membrane, and is a core component in a reverse osmosis device. The reverse osmosis technology principle is that under the action of the osmotic pressure higher than that of the solution, other substances can not permeate the reverse osmosis membrane to separate the substances from water, so that dissolved salts, colloid, microorganisms, organic matters and the like in the water can be effectively removed.
However, in the process of separating and treating sewage, after the reverse osmosis device runs for a period of time, substances such as colloid, metal oxide, bacteria, organic matters or scale and the like can be accumulated on the concentrated water side of the reverse osmosis membrane, so that the reverse osmosis membrane is blocked, and the problems of reduced desalination rate, reduced water yield, increased pressure difference and the like of the system are caused. And effectively cleaning the dirt and blockage on the surface of the reverse osmosis membrane, which is important for relieving reverse osmosis operation pressure and avoiding situation deterioration at the same time, and selecting a membrane cleaning agent.
At present, a series of organic matters and microbial fouling are compounded with alkali and surfactant to form a cleaning agent, and the alkali and the surfactant can enable the organic matters and the microbial fouling to loosen, emulsify and disperse relative to a reverse osmosis membrane so as to clean the reverse osmosis membrane.
In the membrane separation process, the dirt blocking particles and the reverse osmosis membrane have mechanical action or physical-chemical interaction, so that the dirt blocking particles are firmly adsorbed and deposited on the surface or in the membrane holes, and therefore, the cleaning effect of loosening, emulsifying and dispersing the dirt blocking particles only through alkali and surfactant is to be improved.
Disclosure of Invention
In order to improve the cleaning effect on dirt and blockage substances accumulated on a reverse osmosis membrane, the application provides a membrane cleaning agent and a preparation and use method thereof.
The application provides a membrane cleaning agent which adopts the following technical scheme:
the film cleaning agent comprises the following components in percentage by mass: the first lotion and the second lotion of (1.6-1.9);
the first lotion comprises the following components in parts by weight: 20-24% of a builder, 10-16% of a penetrating agent, 3-5% of a non-silicon defoamer and the balance of water;
the builder comprises the following components in percentage by mass: (0.4-0.6) a treating enzyme and an oxidizing agent;
the second lotion comprises the following components in parts by weight: 1-5% of inorganic alkali regulator, 5-10% of surfactant, 10-12% of bactericide, 10-12% of dispersing agent, 3-5% of non-silicon defoaming agent and the balance of water;
the inorganic alkali lotion comprises the following components in percentage by mass: (0.6-0.8) hydroxides and carbonates.
Through adopting above-mentioned technical scheme, when wasing reverse osmosis membrane, carry out first circulation washing to reverse osmosis membrane with the washing liquid of first lotion preparation earlier, the treatment enzyme can carry out the decomposition respectively to the biological sewage blocking material such as colloid and albumen on the reverse osmosis membrane, and the oxidant can carry out oxidation to organic matter such as above-mentioned biological sewage blocking material and grease, makes its denaturation and break away from reverse osmosis membrane surface to destroy above-mentioned sewage blocking material particle and reverse osmosis membrane existence mechanical action or physical chemistry interact, make sewage blocking material particle take place to become flexible or break away from even relative reverse osmosis membrane surface. The penetrating agent can enable the treatment enzyme and the oxidizing agent to fully penetrate between the sewage plugs so as to promote the decomposition and oxidative denaturation of the sewage plugs by the treatment enzyme and the oxidizing agent.
In addition, as the treatment enzyme is also protein, new pollution is formed by adsorbing the treatment enzyme on the surface of the membrane and the inner wall of the membrane hole under the condition of improper pH value, and the treatment enzyme can be oxidized and denatured by the oxidant under the condition that the specific water temperature is reached during the use by the combination of the treatment enzyme and the oxidant, so that the possibility that the treatment enzyme is attached to the surface of the membrane and the inner wall of the membrane hole to form new pollution is reduced.
The biological and organic pollutant and blockage on the reverse osmosis membrane are decomposed and oxidized and denatured by the treatment enzyme and the oxidant, and then the reverse osmosis membrane is circularly cleaned for the second time by the cleaning liquid prepared by the first lotion. The hydroxide and the carbonate are compounded for use, so that the cleaning liquid forms a stable alkaline solution environment, the surfactant can better promote loosening, emulsification and dispersion of the dirt blocking particles in the alkaline solution environment, and the dispersing agent can further prevent mutual agglomeration and deposition among the loosened and emulsified dirt blocking particles, so that the cleaning effect of the reverse osmosis membrane is further improved.
The biological and organic sewage blocking matters are decomposed and oxidized and denatured through the first lotion, so that the connecting structure of the sewage blocking matters particles and the reverse osmosis membrane is effectively destroyed, the sewage blocking matters particles are emulsified and dispersed through the second lotion, the sewage blocking matters on the reverse osmosis membrane can be separated more effectively, and the cleaning effect of the accumulated sewage blocking matters on the reverse osmosis membrane is improved.
Optionally, the treating enzyme comprises a mass ratio of 1: (0.3-0.5): (0.1-0.2): (0.2-0.4): (0.6-0.8) proteases, cellulases, hemicellulases, pectinases and gelatinases.
By adopting the technical scheme, the enzymes are proportioned according to the proportion, and biological fouling substances such as protein and colloid on the reverse osmosis membrane can be fully and comprehensively decomposed, so that the cleaning effect of the reverse osmosis membrane is improved.
Optionally, the oxidizing agent is selected from at least one of hydrogen peroxide, peracetic acid and sodium dichromate.
By adopting the technical scheme, the oxidizing agents are acidic oxidizing agents, and when the oxidizing agents perform redox reaction, the solution environment tends to be acidic, so that the activity of the treatment enzyme is better, and the decomposition effect of the treatment enzyme on the sewage blocking matters is further improved.
Optionally, the surfactant is at least one selected from the group consisting of ethylene diamine tetraacetic acid tetrasodium salt, sodium dodecyl benzene sulfonate, sodium alkyl polyoxyethylene ether sulfate and sodium oleoyl methyl bezoar.
By adopting the technical scheme, the surfactant has excellent emulsifying and dispersing capabilities, and the surfactant is alkali-resistant, so that the emulsifying and dispersing effects can be normally exerted in an alkaline solution environment.
Optionally, the bactericide comprises the following components in percentage by mass: (0.4-0.6): the parabens of (2-4), organic bromine and an alcohol solvent.
By adopting the technical scheme, the parahydroxybenzoate and the organic bromine are high-efficiency low-toxicity bactericides, and can destroy cell membranes, so that intracellular proteins are denatured, the parahydroxybenzoate can also always maintain the activities of respiratory enzyme systems and electron transfer enzyme systems of microbial cells, and bacteria and fungi can be more effectively inhibited by compounding the parahydroxybenzoate and the organic bromine, so that the possibility of algae breeding on a reverse osmosis membrane is realized.
Optionally, the penetrating agent is at least one selected from fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether and sodium sulfamate.
Optionally, the dispersant includes at least one of a sulfonic acid group-containing phosphonocarboxylic acid copolymer and hydrolyzed polymaleic anhydride.
Through adopting above-mentioned technical scheme, above-mentioned dispersant all has excellent dirt dispersion effect, not only can hinder microorganism, organic matter dirt stifled thing particle to take place to reunite, can also chelate dirt dispersion to the metal particle diameter of easy oxidation to further promote the cleaning performance to reverse osmosis membrane.
Optionally, the non-silicon defoamer is selected from at least one of fatty acid glycerides, trialkyl melamines, dialkyl phosphates, and palmitic acid.
By adopting the technical scheme, the defoamer does not contain silicon, so that a large amount of bubbles are not generated in the preparation process of the first lotion and the second lotion, and the silicon-containing compound is not remained after the reverse osmosis membrane is cleaned, thereby causing the condition of forming silica scale on the reverse osmosis membrane.
In a second aspect, the preparation method of the membrane cleaning agent provided by the application adopts the following technical scheme:
a preparation method of a film cleaning agent comprises the following steps:
mixing the builder, the penetrating agent, the non-silicon defoamer and water with the content, and uniformly stirring to prepare a first lotion; mixing the inorganic alkaline lotion, the surfactant, the bactericide, the dispersing agent, the non-silicon defoaming agent and water in the content, and uniformly stirring to prepare a second lotion;
and (3) separating and packaging the first lotion and the second lotion to obtain a film cleaning agent, wherein the mass ratio of the first lotion to the second lotion is 1: (1.6-1.9).
In a third aspect, the application method of the film cleaning agent provided by the application adopts the following technical scheme:
the application method of the film cleaning agent comprises the following steps:
the first lotion is put into water, and the put mass ratio of the first lotion to the water is 1: (90-110), heating to 30-35 ℃, and opening a valve to perform first cycle cleaning;
after the first cycle cleaning is finished, the second lotion is put into water, and the mass ratio of the second lotion to the water is 1: (90-110), heating to 40-50 ℃, and opening a valve for second cycle cleaning.
By adopting the technical scheme, the first lotion and the second lotion are respectively blended with water, and the treatment enzyme in the first lotion can better decompose microbial fouling in a solution environment of 30-35 ℃. And then, carrying out circulating cleaning on the second lotion cleaning liquid at the temperature of 40-50 ℃, wherein with the rising of the temperature and the pH, the residual oxidizing agent on the reverse osmosis membrane can enable the residual treating enzyme to carry out oxidative denaturation, and part of treating enzyme also starts to denature and deactivate in a high pH environment, so that the residual treating enzyme on the reverse osmosis membrane can be cleaned and separated while emulsifying and dispersing the dirt and blockage, and the possibility of forming new pollution on the reverse osmosis membrane is reduced.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the biological and organic sewage blocking matters are decomposed and oxidized and denatured firstly through the first lotion, so that the connection structure of the sewage blocking matters particles and the reverse osmosis membrane is effectively destroyed, and then the sewage blocking matters particles are emulsified and dispersed through the second lotion, so that the sewage blocking matters on the reverse osmosis membrane can be separated more effectively, and the cleaning effect of the sewage blocking matters accumulated on the reverse osmosis membrane is improved; 2. the parahydroxybenzoate and the organic bromine are high-efficiency low-toxicity bactericides, and can destroy cell membranes to denature intracellular proteins, and the parahydroxybenzoate can also keep the activities of a respiratory enzyme system and an electron transfer enzyme system of microorganism cells, so that the parahydroxybenzoate and the organic bromine are compounded and used, bacteria and fungi can be more effectively inhibited, and the possibility of algae breeding on a reverse osmosis membrane is further realized;
3. the defoamer does not contain silicon, so that a large amount of bubbles are not generated in the preparation process of the first lotion and the second lotion, and silicon-containing compounds are not remained after the reverse osmosis membrane is cleaned, thereby causing the condition of forming silica scale on the reverse osmosis membrane.
Detailed Description
1. Examples
Example 1:
a film cleaning agent comprising a first lotion and a second lotion.
The first lotion comprises the following components in percentage by weight: 20% of a builder, 10% of a penetrating agent, 3% of a non-silicon defoamer and the balance of water;
wherein the builder comprises a mass ratio of 1:0.5 treating enzyme and oxidizing agent;
wherein the treating enzyme comprises the following components in percentage by mass: 0.4:0.15:0.3: proteases, cellulases, hemicellulases, pectinases and gelatinases of 0.7;
wherein the oxidant is hydrogen peroxide, the penetrating agent is fatty alcohol polyoxyethylene ether, and the non-silicon defoaming agent is trialkyl melamine.
The second lotion comprises the following components in parts by weight: 1% of inorganic alkali regulator, 5% of surfactant, 10% of bactericide, 10% of dispersing agent, 3% of non-silicon defoamer and the balance of water;
wherein the inorganic alkali lotion comprises the following components in percentage by mass: hydroxides and carbonates of 0.7;
wherein the bactericide comprises the following components in percentage by mass: 0.5:3, organic bromine and an alcohol solvent, wherein the organic bromine is selected from 2, 2-dibromo-3-nitrilopropionamide, and the alcohol solvent is selected from 3-propylene glycol;
wherein the surfactant is ethylenediamine tetraacetic acid tetrasodium salt, the dispersant is hydrolyzed polymaleic anhydride, and the non-silicon defoamer is dialkyl phosphate.
Preparation of a membrane cleaning agent:
mixing and uniformly stirring 2kg of a builder, 1kg of fatty alcohol-polyoxyethylene ether, 0.3kg of trialkyl melamine and 6.7kg of water to prepare a first lotion;
mixing 0.18kg of inorganic alkali lotion, 0.9kg of ethylene diamine tetraacetic acid tetrasodium salt, 1.8kg of bactericide, 1.8kg of hydrolyzed polymaleic anhydride, 0.54kg of dialkyl phosphate and water, and uniformly stirring to prepare a second lotion;
the first lotion and the second lotion are separated and packaged to obtain the film cleaning agent, wherein the mass of the first lotion is 10kg, the mass of the second lotion is 18kg, and the mass ratio of the first lotion to the second lotion is 1:1.7.
use of a membrane cleaner:
adding water into the cleaning water tank to 1m 3 Adding the prepared first lotion, wherein the mass ratio of the first lotion to water is 1:100, heating to 35 ℃, and opening a valve to carry out first cycle cleaning on the reverse osmosis membrane for 6 hours;
after the first cycle cleaning is completed, water is added into the cleaning water tank to 1.7m 3 And adding the prepared second lotion, heating to 45 ℃, and opening a valve to carry out second cycle cleaning on the reverse osmosis membrane for 18 hours.
Examples 2-3:
a film cleaning agent is different from example 1 in that table 1.
Table 1:
examples 4 to 5:
a film cleaning agent is different from example 2 in that table 2.
Table 2:
example 6:
a film cleaning agent, which is different from example 4 in that: the mass ratio of the first lotion to the second lotion is 1:1.6.
example 7:
a film cleaning agent, which is different from example 4 in that: the mass ratio of the first lotion to the second lotion is 1:1.9.
example 8:
a film cleaning agent, which is different from example 4 in that: the mass ratio of the treatment enzyme to the oxidant in the builder is 1:0.4.
example 9:
a film cleaning agent, which is different from example 4 in that: the mass ratio of the treatment enzyme to the oxidant in the builder is 1:0.6.
example 10:
a film cleaning agent, which is different from example 4 in that: the mass ratio of protease, cellulase, hemicellulase, pectinase and gel enzyme in the treating enzyme is 1:0.3:0.1:0.2:0.6.
example 11:
a film cleaning agent, which is different from example 4 in that: the mass ratio of protease, cellulase, hemicellulase, pectinase and gel enzyme in the treating enzyme is 1:0.5:0.2:0.4:0.8.
example 12:
a film cleaning agent, which is different from example 4 in that: the mass ratio of the parahydroxybenzoate to the 2, 2-dibromo-3-nitrilopropionamide to the 3-propylene glycol in the bactericide is 1:0.4:2.
example 13:
a film cleaning agent, which is different from example 4 in that: the mass ratio of the parahydroxybenzoate to the 2, 2-dibromo-3-nitrilopropionamide to the 3-propylene glycol in the bactericide is 1:0.6:4.
example 14:
a film cleaning agent, which is different from example 4 in that: when in use, the mass ratio of the first lotion to the water is 1:90, the mass ratio of the second lotion to the water is also 1:90.
example 15:
a film cleaning agent, which is different from example 4 in that: when in use, the mass ratio of the first lotion to the water is 1:110, the mass ratio of the second lotion to the water is also 1:110.
example 16:
a film cleaning agent, which is different from example 4 in that: the mass ratio of the hydroxide to the carbonate is 1:0.6.
example 17:
a film cleaning agent, which is different from example 4 in that: the mass ratio of the hydroxide to the carbonate is 1:0.8.
2. comparative example
Comparative example 1:
the difference from example 4 is that: the first lotion is replaced by the second lotion in equal quantity, and water is added into the cleaning water tank until the water is 1m 3 Adding the prepared second lotion which is equal to the first lotion, wherein the mass ratio of the second lotion to water is 1:100, heating to 45 ℃, and opening a valve to carry out first circulation cleaning on the reverse osmosis membrane for 6 hours;
after the first cycle cleaning is finished, water is added into the cleaning water tank to 1.8m 3 And adding the prepared second lotion, heating to 45 ℃, and opening a valve to carry out second cycle cleaning on the reverse osmosis membrane for 18 hours. .
Comparative example 2:
the difference from example 4 is that: the mass ratio of the first lotion to the second lotion is 1:1.2.
comparative example 3:
the difference from example 4 is that: the mass ratio of the first lotion to the second lotion is 1:2.2.
comparative example 4:
the difference from example 4 is that: the treating enzymes in the builder are replaced by the oxidizing agent in equal amounts.
Comparative example 5:
the difference from example 4 is that: the oxidizing agent in the builder is replaced equally with the treating enzyme.
Comparative example 6:
the difference from example 4 is that: equivalent 2, 2-dibromo-3-nitrilopropionamide in the bactericide is replaced by parahydroxybenzoate.
Comparative example 7:
the difference from example 4 is that: the equivalent amount of the parahydroxybenzoate in the bactericide is replaced by 2, 2-dibromo-3-nitrilopropionamide.
Comparative example 8:
the difference from example 4 is that: when the washing machine is used, the first lotion and the second lotion are directly mixed, then water with the mass ratio of 100 to the total mass of the first lotion and the second lotion is added, the temperature is heated to 45 ℃, and a valve is opened for circular washing.
3. Performance test
Firstly, carrying out data recording on water inlet pressure, water outlet pressure and water yield of the on-site operation of a reverse osmosis system before cleaning for 5 continuous days, and taking an average value;
respectively recording the data of water inlet pressure, water outlet pressure and water yield of the field operation of the reverse osmosis system which are cleaned by using the membrane cleaning agents and the cleaning modes of the examples 1-15 and the comparative examples 1-8 for 5 days, and taking an average value;
the above test results are shown in Table 3.
Table 3:
4. analysis and summary of results
As can be seen from a combination of examples 1-3 and Table 3, the first lotions of examples 1-3 have different amounts of each component, and it can be seen from Table 3 that the in-situ running water inlet and outlet pressure difference of the reverse osmosis systems of examples 1-3 is significantly lower than the water inlet and outlet pressure difference before cleaning, and the water yield is significantly higher than the water yield before cleaning. The inlet/outlet water pressure difference in example 2 was lower than that in example 1 and the water yield was higher than that in example 1, and the inlet/outlet water pressure difference and the water yield in example 3 were equal to those in example 2.
From the above, the first lotion and the second lotion compounded by the builder, the penetrating agent and the defoamer are matched for use, so that the reverse osmosis membrane can be effectively cleaned, and the condition that the reverse osmosis membrane is blocked to cause the reduction of the water treatment efficiency is reduced; in addition, the content of each component of the first lotion of example 2 can achieve relatively optimal cleaning effect while saving the amount of reagent to reduce cleaning cost.
As can be seen from a combination of examples 2, examples 4-5 and table 3, the second lotions of examples 4-5 all have different contents of components from example 2, and it can be seen from table 3 that the in-situ running water inlet and outlet pressure difference of the reverse osmosis system of example 4 is lower than that of example 2, and the water yield is higher than that of example 2; the difference in water inlet and outlet pressure of example 5 was slightly higher than that of example 2 and the water yield was slightly lower than that of example 2. From the above, the content of each component of the second lotion of example 4 can achieve relatively optimal cleaning effect while saving the amount of reagent to reduce cleaning cost.
As can be seen from a combination of examples 4, examples 6-7 and table 3, the mass ratios of the first and second lotions in examples 6-7 are different from example 4, and it can be seen from table 3 that the in-situ running water inlet/outlet pressure difference of the reverse osmosis systems of examples 6-7 is higher than that of example 4, and the water yield is lower than that of example 4.
Also, as can be seen from the combination of comparative examples 1 to 3, in comparative example 1, the first lotion was replaced with the second lotion in the same amount, that is, the second lotion used for both the first cycle cleaning and the second cycle cleaning, and as can be seen from Table 3, the inlet and outlet water pressure difference of comparative example 1 was significantly higher than that of examples 4 and examples 6 to 7, and the water yield was significantly lower than that of examples 4 and examples 6 to 7. Also, the mass ratio of the first lotion to the second lotion in comparative examples 2-3 was outside the scope of the present application, and it can be seen from Table 3 that the inlet and outlet water pressure difference of comparative examples 2-3 was significantly higher than that of examples 4 and examples 6-7, and the water yield was significantly lower than that of examples 4 and examples 6-7.
From the above, when the cleaning is performed by the second lotion, the cleaning effect is obviously inferior to that when the first lotion and the second lotion are used in combination for cleaning; and the mass ratio of the first lotion to the second lotion is 1: when the cleaning agent is compounded and used in a proportion of 1.8, the cleaning effect is relatively better.
As can be seen from a combination of examples 4, examples 8-9 and Table 3, the mass ratios of treatment enzyme and oxidant in the builders of examples 8-9 are different from those of example 4, and it can be seen from Table 3 that the in-situ run water inlet/outlet pressure difference of the reverse osmosis systems of examples 8-9 is higher than that of example 4 and the water yield is lower than that of example 4.
Also, in combination with comparative examples 4 to 5, the same amount of treatment enzyme as in the builder was replaced with the same amount of oxidizing agent in comparative example 4, and the same amount of oxidizing agent as in the builder was replaced with the same amount of treatment enzyme in comparative example 5, and as can be seen from Table 3, the inlet and outlet water pressure difference of comparative examples 4 to 5 was significantly higher than that of examples 4 and examples 8 to 9, and the water yield was significantly lower than that of examples 4 and examples 8 to 9.
The method has the advantages that the oxidant and the treatment enzyme are compounded to form the builder for use, and compared with the method for independently using the oxidant or the treatment enzyme, the method has better cleaning effect on the reverse osmosis membrane; and when the mass ratio of the oxidizing agent to the treating enzyme in the builder is 1: at 0.5, the cleaning effect on the reverse osmosis membrane is relatively better.
As can be seen from a combination of examples 4, examples 10-11 and Table 3, the mass ratios of protease, cellulase, hemicellulase, pectinase and gelase in the treatment enzymes of examples 10-11 are different from those of example 4, and it can be seen from Table 3 that the in-situ running water inlet/outlet pressure difference of the reverse osmosis system of examples 10-11 is higher than that of example 4, and the water yield is lower than that of example 4. From the above, the mass ratio of protease, cellulase, hemicellulase, pectinase and gelase in the treatment enzyme is 1:0.4:0.15:0.3: at 0.7, the cleaning effect on the reverse osmosis membrane is relatively better.
As can be seen from a combination of examples 4, examples 12-13 and Table 3, the mass ratios of the parabens, 2-dibromo-3-nitrilopropionamide and 3-propanediol in the bactericides of examples 12-13 are all different from example 4, and it can be seen from Table 3 that the in-situ running water inlet/outlet pressure difference of the reverse osmosis system of examples 12-13 is higher than that of example 4 and the water yield is lower than that of example 4.
And in combination with comparative examples 6-7, 2-dibromo-3-nitrilopropionamide in the bactericide was replaced with an equivalent amount of p-hydroxybenzoate in comparative example 6, and the equivalent amount of p-hydroxybenzoate in the bactericide was replaced with 2, 2-dibromo-3-nitrilopropionamide in comparative example 7. As can be seen from Table 3, the water inlet and outlet pressure difference of comparative examples 6-7 was significantly higher than that of examples 4 and examples 10-11, and the water yield was significantly lower than that of examples 4 and examples 10-11.
From the above, the parahydroxybenzoate and the organic bromine are compounded to be used as the bactericide, and compared with the parahydroxybenzoate or the organic bromine which is singly used, the cleaning effect on the reverse osmosis membrane is better; and when the mass ratio of the hydroxybenzoate to the organic bromine to the alcohol solvent in the bactericide is 1:0.5:3, the cleaning effect on the reverse osmosis membrane is relatively better.
As can be seen from a combination of examples 4, examples 14-15 and table 3, the mass of the first/second lotions and water administered in use of examples 14-15 is different from example 4, and it can be seen from table 3 that the in-situ running water inlet/outlet pressure difference of the reverse osmosis system of examples 14-15 is higher than that of example 4 and the water yield is lower than that of example 4. From the above, when the mass ratio of the first lotion to the water is 1:100 and the mass ratio of the second lotion to the water is also 1:100, the cleaning effect on the reverse osmosis membrane is relatively better.
As can be seen from a combination of comparative example 8 and table 3, comparative example 8 was used in which the first lotion and the second lotion were directly mixed for circulation washing, and it can be seen from table 3 that the water inlet and outlet pressure difference of comparative example 8 was significantly higher than that of example 4 and the water yield was significantly lower than that of example 4. From the above, the cleaning effect of preparing the first lotion into the cleaning liquid to carry out the first cycle cleaning on the reverse osmosis membrane and then preparing the second lotion into the cleaning liquid to carry out the second cycle cleaning is obviously better than that of directly mixing the first lotion and the second lotion.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes of products, methods and principles of this application are intended to be covered by the scope of this application.
Claims (10)
1. A film cleaning agent, which is characterized in that: comprises the following components in percentage by mass: the first lotion and the second lotion of (1.6-1.9);
the first lotion comprises the following components in parts by weight: 20-24% of a builder, 10-16% of a penetrating agent, 3-5% of a non-silicon defoamer and the balance of water;
the builder comprises the following components in percentage by mass: (0.4-0.6) a treating enzyme and an oxidizing agent;
the second lotion comprises the following components in parts by weight: 1-5% of inorganic alkali regulator, 5-10% of surfactant, 10-12% of bactericide, 10-12% of dispersing agent, 3-5% of non-silicon defoaming agent and the balance of water;
the inorganic alkali lotion comprises the following components in percentage by mass: (0.6-0.8) hydroxides and carbonates.
2. The film cleaning agent according to claim 1, wherein: the treating enzyme comprises the following components in percentage by mass: (0.3-0.5): (0.1-0.2): (0.2-0.4): (0.6-0.8) proteases, cellulases, hemicellulases, pectinases and gelatinases.
3. The film cleaning agent according to claim 1, wherein: the oxidant is selected from at least one of hydrogen peroxide, peracetic acid and sodium dichromate.
4. The film cleaning agent according to claim 1, wherein: the surfactant is at least one selected from the group consisting of ethylene diamine tetraacetic acid disodium salt, sodium dodecyl benzene sulfonate, sodium alkyl polyoxyethylene ether sulfate and sodium oleoyl methyl bezoar.
5. The film cleaning agent according to claim 1, wherein: the bactericide comprises the following components in percentage by mass: (0.4-0.6): (2-4), an organic bromine and an alcohol solvent.
6. The film cleaning agent according to claim 1, wherein: the penetrating agent is at least one selected from fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether and sodium sulfamate.
7. The film cleaning agent according to claim 1, wherein: the dispersant includes at least one of a sulfonic acid group-containing phosphonocarboxylic acid copolymer and hydrolyzed polymaleic anhydride.
8. The film cleaning agent according to claim 1, wherein: the non-silicon defoamer is at least one of fatty acid glyceride, trialkyl, dialkyl phosphate and palmitic acid.
9. A method for preparing the film cleaning agent as claimed in any one of claims 1 to 8, comprising the steps of:
mixing the builder, the penetrating agent, the non-silicon defoamer and water with the content, and uniformly stirring to prepare a first lotion;
mixing the inorganic alkaline lotion, the surfactant, the bactericide, the dispersing agent, the non-silicon defoaming agent and water in the content, and uniformly stirring to prepare a second lotion;
and (3) separating and packaging the first lotion and the second lotion to obtain a film cleaning agent, wherein the mass ratio of the first lotion to the second lotion is 1: (1.6-1.9).
10. A method of using the film cleaning agent as claimed in any one of claims 1 to 8, comprising the steps of:
the first lotion is put into water, and the put mass ratio of the first lotion to the water is 1: (90-110), heating to 30-35 ℃, and opening a valve to perform first cycle cleaning;
after the first cycle cleaning is finished, the second lotion is put into water, and the mass ratio of the second lotion to the water is 1: (90-110), heating to 40-50 ℃, and opening a valve for second cycle cleaning.
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