WO2023112819A1 - 逆浸透膜システムのシリカ汚染抑制法およびシリカ汚染抑制剤 - Google Patents
逆浸透膜システムのシリカ汚染抑制法およびシリカ汚染抑制剤 Download PDFInfo
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- WO2023112819A1 WO2023112819A1 PCT/JP2022/045255 JP2022045255W WO2023112819A1 WO 2023112819 A1 WO2023112819 A1 WO 2023112819A1 JP 2022045255 W JP2022045255 W JP 2022045255W WO 2023112819 A1 WO2023112819 A1 WO 2023112819A1
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- WIPO (PCT)
- Prior art keywords
- acid
- acrylic acid
- water
- silica
- reverse osmosis
- Prior art date
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 239000012528 membrane Substances 0.000 title claims abstract description 58
- 239000000377 silicon dioxide Substances 0.000 title claims abstract description 44
- 238000011109 contamination Methods 0.000 title claims abstract description 36
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000003112 inhibitor Substances 0.000 title claims abstract description 9
- 230000005764 inhibitory process Effects 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 54
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 51
- 229920000642 polymer Polymers 0.000 claims abstract description 44
- -1 N-substituted acrylamide Chemical class 0.000 claims abstract description 36
- 239000007800 oxidant agent Substances 0.000 claims abstract description 33
- 239000000460 chlorine Substances 0.000 claims abstract description 27
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 23
- 229920001577 copolymer Polymers 0.000 claims abstract description 22
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims abstract description 15
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims abstract description 15
- 239000011976 maleic acid Substances 0.000 claims abstract description 15
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims abstract description 15
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims abstract description 11
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052794 bromium Inorganic materials 0.000 claims abstract description 11
- 229920001897 terpolymer Polymers 0.000 claims abstract description 11
- XHZPRMZZQOIPDS-UHFFFAOYSA-N 2-Methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid Chemical compound OS(=O)(=O)CC(C)(C)NC(=O)C=C XHZPRMZZQOIPDS-UHFFFAOYSA-N 0.000 claims description 27
- 230000001590 oxidative effect Effects 0.000 claims description 9
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 7
- 229920002125 Sokalan® Polymers 0.000 claims description 4
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 4
- 125000005250 alkyl acrylate group Chemical group 0.000 claims description 4
- 239000004584 polyacrylic acid Substances 0.000 claims description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 claims description 3
- 229920001444 polymaleic acid Polymers 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- 238000011954 pollution control method Methods 0.000 claims 1
- DZSVIVLGBJKQAP-UHFFFAOYSA-N 1-(2-methyl-5-propan-2-ylcyclohex-2-en-1-yl)propan-1-one Chemical compound CCC(=O)C1CC(C(C)C)CC=C1C DZSVIVLGBJKQAP-UHFFFAOYSA-N 0.000 abstract 1
- BOOMOFPAGCSKKE-UHFFFAOYSA-N butane-2-sulfonic acid;prop-2-enamide Chemical compound NC(=O)C=C.CCC(C)S(O)(=O)=O BOOMOFPAGCSKKE-UHFFFAOYSA-N 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 description 11
- 239000000498 cooling water Substances 0.000 description 7
- 238000011084 recovery Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 6
- 239000002455 scale inhibitor Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 229910052783 alkali metal Inorganic materials 0.000 description 4
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 4
- 238000001471 micro-filtration Methods 0.000 description 3
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid Chemical class NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 description 3
- 238000000108 ultra-filtration Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- YUMNNMSNSLHINV-UHFFFAOYSA-N chloro sulfamate Chemical compound NS(=O)(=O)OCl YUMNNMSNSLHINV-UHFFFAOYSA-N 0.000 description 2
- OGQPUOLFKIMRMF-UHFFFAOYSA-N chlorosulfamic acid Chemical class OS(=O)(=O)NCl OGQPUOLFKIMRMF-UHFFFAOYSA-N 0.000 description 2
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 2
- 238000005188 flotation Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 2
- 238000011085 pressure filtration Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- IIACRCGMVDHOTQ-UHFFFAOYSA-M sulfamate Chemical compound NS([O-])(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-M 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 235000020681 well water Nutrition 0.000 description 2
- 239000002349 well water Substances 0.000 description 2
- RTQPZPWCYWVQCL-UHFFFAOYSA-N 1-[3-(2-methoxyethoxy)phenyl]piperazine Chemical compound COCCOC1=CC=CC(N2CCNCC2)=C1 RTQPZPWCYWVQCL-UHFFFAOYSA-N 0.000 description 1
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 description 1
- JJKVMNNUINFIRK-UHFFFAOYSA-N 4-amino-n-(4-methoxyphenyl)benzamide Chemical compound C1=CC(OC)=CC=C1NC(=O)C1=CC=C(N)C=C1 JJKVMNNUINFIRK-UHFFFAOYSA-N 0.000 description 1
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 description 1
- QDHHCQZDFGDHMP-UHFFFAOYSA-N Chloramine Chemical compound ClN QDHHCQZDFGDHMP-UHFFFAOYSA-N 0.000 description 1
- 239000004155 Chlorine dioxide Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- WOHVONCNVLIHKY-UHFFFAOYSA-L [Ba+2].[O-]Cl=O.[O-]Cl=O Chemical compound [Ba+2].[O-]Cl=O.[O-]Cl=O WOHVONCNVLIHKY-UHFFFAOYSA-L 0.000 description 1
- 229920006322 acrylamide copolymer Polymers 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- KHPLPBHMTCTCHA-UHFFFAOYSA-N ammonium chlorate Chemical compound N.OCl(=O)=O KHPLPBHMTCTCHA-UHFFFAOYSA-N 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- ISFLYIRWQDJPDR-UHFFFAOYSA-L barium chlorate Chemical compound [Ba+2].[O-]Cl(=O)=O.[O-]Cl(=O)=O ISFLYIRWQDJPDR-UHFFFAOYSA-L 0.000 description 1
- HPEWZLCIOKVLBZ-UHFFFAOYSA-N barium hypochlorite Chemical compound [Ba+2].Cl[O-].Cl[O-] HPEWZLCIOKVLBZ-UHFFFAOYSA-N 0.000 description 1
- 159000000009 barium salts Chemical class 0.000 description 1
- BEHLMOQXOSLGHN-UHFFFAOYSA-N benzenamine sulfate Chemical compound OS(=O)(=O)NC1=CC=CC=C1 BEHLMOQXOSLGHN-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- YALMXYPQBUJUME-UHFFFAOYSA-L calcium chlorate Chemical compound [Ca+2].[O-]Cl(=O)=O.[O-]Cl(=O)=O YALMXYPQBUJUME-UHFFFAOYSA-L 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- RSIPQRDGPVEGLE-UHFFFAOYSA-L calcium;disulfamate Chemical compound [Ca+2].NS([O-])(=O)=O.NS([O-])(=O)=O RSIPQRDGPVEGLE-UHFFFAOYSA-L 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- XTEGARKTQYYJKE-UHFFFAOYSA-N chloric acid Chemical compound OCl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-N 0.000 description 1
- 229940005991 chloric acid Drugs 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- 229940077239 chlorous acid Drugs 0.000 description 1
- 150000001868 cobalt Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 150000007973 cyanuric acids Chemical class 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- YGNOYUCUPMACDT-UHFFFAOYSA-N dimethylsulfamic acid Chemical compound CN(C)S(O)(=O)=O YGNOYUCUPMACDT-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 150000002357 guanidines Chemical class 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 150000002430 hydrocarbons Chemical group 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229920001477 hydrophilic polymer Polymers 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 159000000014 iron salts Chemical class 0.000 description 1
- QOPYJZKVLMVYHE-UHFFFAOYSA-N iron sulfamic acid Chemical compound [Fe].S(N)(O)(=O)=O QOPYJZKVLMVYHE-UHFFFAOYSA-N 0.000 description 1
- 150000002696 manganese Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- MYMDOKBFMTVEGE-UHFFFAOYSA-N methylsulfamic acid Chemical compound CNS(O)(=O)=O MYMDOKBFMTVEGE-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002815 nickel Chemical class 0.000 description 1
- AMULHDKUJWPBKU-UHFFFAOYSA-L nickel(2+);dichlorite Chemical compound [Ni+2].[O-]Cl=O.[O-]Cl=O AMULHDKUJWPBKU-UHFFFAOYSA-L 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 description 1
- SATVIFGJTRRDQU-UHFFFAOYSA-N potassium hypochlorite Chemical compound [K+].Cl[O-] SATVIFGJTRRDQU-UHFFFAOYSA-N 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- VISKNDGJUCDNMS-UHFFFAOYSA-M potassium;chlorite Chemical compound [K+].[O-]Cl=O VISKNDGJUCDNMS-UHFFFAOYSA-M 0.000 description 1
- BTAAXEFROUUDIL-UHFFFAOYSA-M potassium;sulfamate Chemical compound [K+].NS([O-])(=O)=O BTAAXEFROUUDIL-UHFFFAOYSA-M 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 description 1
- 229960002218 sodium chlorite Drugs 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- QDWYPRSFEZRKDK-UHFFFAOYSA-M sodium;sulfamate Chemical compound [Na+].NS([O-])(=O)=O QDWYPRSFEZRKDK-UHFFFAOYSA-M 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 159000000008 strontium salts Chemical class 0.000 description 1
- PHUJCVAICLQULC-UHFFFAOYSA-L strontium;disulfamate Chemical compound [Sr+2].NS([O-])(=O)=O.NS([O-])(=O)=O PHUJCVAICLQULC-UHFFFAOYSA-L 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
Images
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
- B01D65/08—Prevention of membrane fouling or of concentration polarisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/04—Feed pretreatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/12—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen
-
- 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
- B01D2321/167—Use of scale inhibitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Definitions
- the present invention relates to a method and inhibitor for suppressing silica contamination in a reverse osmosis membrane (RO membrane) system.
- RO membrane reverse osmosis membrane
- RO membrane devices that can efficiently remove electrolytes and medium- and low-molecular-weight organic components are widely used.
- pretreatment such as pressure filtration equipment, gravity filtration equipment, coagulation sedimentation treatment equipment, pressure flotation filtration equipment, immersion membrane equipment, membrane pretreatment equipment, etc. is usually performed before the RO membrane equipment.
- Equipment is provided, and the water to be treated is pretreated by these pretreatment devices and then supplied to the RO membrane device for RO membrane separation treatment.
- the silica contained in the water to be treated can clog the RO membrane, causing problems such as an increase in the module pressure difference and a decrease in the amount of permeated water.
- silica scale inhibitors examples include polyacrylamide (Patent Document 1), polyethylene glycol (Patent Document 2), polyvinylformamide (Patent Document 3), acrylic acid, acrylamidomethylpropanesulfonic acid, and a terpolymer of N-substituted acrylamide (Patent Document 4), and those containing various hydrophilic polymers such as polyvinylpyrrolidone (Patent Document 5).
- Patent Document 6 describes adding a chlorosulfamate-based oxidant to the water supply of the RO membrane in order to prevent RO membrane contamination.
- the anti-scaling agent is intended to prevent contamination by silica scale even when silica is supersaturated, and has the effect of preventing contamination on the tail side (concentrated water outlet side) in the RO membrane device. be.
- silica scale may cause contamination even on the lead side (feed water side) in the RO membrane apparatus.
- An object of the present invention is to provide a silica contamination suppression method and inhibitor for a reverse osmosis membrane system that can suppress silica contamination not only on the tail side of a reverse osmosis membrane device but also on the lead side.
- the gist of the present invention is as follows.
- the acrylic acid-based polymer and/or maleic acid-based polymer is polyacrylic acid, polymaleic acid, a copolymer of acrylic acid and acrylamidomethylpropanesulfonic acid, acrylic acid, acrylamidomethylpropanesulfonic acid, and N-substituted acrylamide copolymers of acrylic acid and sodium allyloxyhydroxypropane sulfonate; copolymers of maleic anhydride, vinyl acetate and alkyl acrylate; and copolymers of maleic anhydride and isobutylene.
- the method for suppressing silica contamination according to [1] characterized in that it is at least one polymer.
- the acrylic acid-based polymer is a copolymer of acrylic acid and acrylamidomethylpropanesulfonic acid or a terpolymer of acrylic acid, acrylamidomethylpropanesulfonic acid and N-substituted acrylamide
- the acrylic acid-based polymer is a copolymer of acrylic acid and acrylamidomethylpropanesulfonic acid or a terpolymer of acrylic acid, acrylamidomethylpropanesulfonic acid and N-substituted acrylamide
- a silica fouling inhibitor for a reverse osmosis membrane system comprising:
- both a polymer as a scale inhibitor and a combined chlorine-based oxidant and/or a combined bromine-based oxidant as an auxiliary agent are present in the water to be treated, so that the tail side of the reverse osmosis membrane system Not only is scaling suppressed, but the combined chlorine-based oxidant and/or the combined bromine-based oxidant keeps the film clean, which also suppresses silica contamination on the lead side.
- an acrylic acid-based polymer and/or a maleic acid-based polymer and a combined chlorine-based oxidant and/or a combined bromine-based oxidant are present in the water to be treated in order to suppress silica contamination of the RO membrane system.
- the silica contamination inhibitor of the present invention is a combination of this acrylic acid-based polymer and/or maleic acid-based polymer and a combined chlorine-based oxidizing agent and/or a combined bromine-based oxidizing agent. well, and may be made into a single agent.
- acrylic acid-based polymers and maleic acid-based polymers include polyacrylic acid, polymaleic acid, copolymers of acrylic acid and acrylamidomethylpropanesulfonic acid, terpolymers of acrylic acid, acrylamidomethylpropanesulfonic acid and N-substituted acrylamide, acrylic At least one selected from the group consisting of copolymers of acid and sodium allyloxyhydroxypropanesulfonate, copolymers of maleic anhydride, vinyl acetate and alkyl acrylate, and copolymers of maleic anhydride and isobutylene. Polymers are preferred, especially copolymers of acrylic acid and acrylamidomethylpropanesulfonic acid or terpolymers of acrylic acid, acrylamidomethylpropanesulfonic acid and N-substituted acrylamides.
- AA acrylic acid
- AMPS acrylamidomethylpropanesulfonic acid
- a copolymer obtained by copolymerizing AA:AMPS at a ratio of 50 to 99:1 to 50 (molar ratio) is suitable.
- AA:AMPS:(N-substituted acrylamide) 60-98:1-20:1-20 (molar ratio, total of 100 ) is preferred.
- the acrylic acid-based polymer and maleic acid-based polymer preferably have a weight average molecular weight of 1,000 to 50,000, particularly 1,500 to 25,000.
- the weight average molecular weight is a value converted to sodium polyacrylate by GPC.
- Chlorosulfamic acid compounds are suitable as the combined chlorine-based oxidizing agent and the combined bromine-based oxidizing agent.
- Chlorosulfamic acid is obtained by mixing a chlorine-based oxidizing agent such as hypochlorous acid and a sulfamic acid compound such as sulfamate. That is, when a chlorine-based oxidizing agent such as hypochlorite and a sulfamic acid compound such as sulfamate are mixed, they combine to form chlorosulfamate, which is stabilized and dissociated by pH like chloramine. It is possible to maintain a stable concentration of free chlorine in water without causing gender differences and variations in free chlorine concentration caused thereby.
- the chlorine-based oxidizing agent used in the present invention is not particularly limited, and examples include chlorine gas, chlorine dioxide, hypochlorous acid or salts thereof, chlorous acid or salts thereof, chloric acid or salts thereof, perchloric acid or salts thereof, Chlorinated isocyanuric acid or salts thereof can be mentioned.
- specific examples of salt forms include hypochlorite alkali metal salts such as sodium hypochlorite and potassium hypochlorite, and hypochlorites such as calcium hypochlorite and barium hypochlorite.
- chlorine-based oxidizing agents may be used singly or in combination of two or more.
- hypochlorite is easy to handle and can be preferably used.
- the sulfamic acid compound used in the present invention includes compounds represented by the following general formula [1] or salts thereof.
- R 1 and R 2 are each independently hydrogen or a hydrocarbon group having 1 to 8 carbon atoms.
- sulfamic acid compounds include sulfamic acid in which both R 1 and R 2 are hydrogen, as well as N-methylsulfamic acid, N,N-dimethylsulfamic acid, and N-phenylsulfamic acid. can be done.
- Salts of sulfamic acid compounds include, for example, alkali metal salts such as sodium salts and potassium salts, alkaline earth metal salts such as calcium salts, strontium salts and barium salts, manganese salts, copper salts, zinc salts, iron salts, and cobalt salts. salts, other metal salts such as nickel salts, ammonium salts and guanidine salts, specifically sodium sulfamate, potassium sulfamate, calcium sulfamate, strontium sulfamate, barium sulfamate, sulfamic acid Iron, zinc sulfamate and the like can be mentioned. Sulfamic acid and these sulfamates can be used singly or in combination of two or more.
- the acrylic acid-based polymer and/or maleic acid-based polymer is preferably added so that the concentration in the water to be treated is 0.1 to 5 mg/L, particularly 0.15 to 3 mg/L.
- the chlorosulfamic acid compound is preferably added so that the concentration in the water to be treated is 0.1 to 10 mg/L as Cl 2 , particularly 0.3 to 5 mg/L.
- the Cl2 concentration is the value measured by the DPD method.
- the acrylic acid-based polymer and/or maleic acid-based polymer and the chlorosulfamic acid compound may be added separately to the water to be treated.
- Pretreatment equipment such as pressure filtration equipment, gravity filtration equipment, coagulation sedimentation treatment equipment, pressure flotation filtration equipment, immersion membrane equipment, membrane pretreatment equipment, etc. After being pretreated by the treatment equipment, it is supplied to the RO membrane equipment and subjected to RO membrane separation treatment. Acrylic acid-based polymer and/or maleic acid-based polymer is added after pretreatment.
- the chlorosulfamic acid compound may be added after the pretreatment, or may be added in an aqueous system such as a residue of the chlorosulfamic acid compound used in the pretreatment or its previous stage.
- the ratio of each of the acrylic acid-based polymer and/or maleic acid-based polymer and the chlorosulfamic acid compound in the silica scale inhibitor of the present invention is the concentration of each component when added to the water to be treated. is within the above range.
- the raw water to be treated is not particularly limited, and can be applied to all water to which RO membrane treatment is applied, including industrial water, city water (tap water), well water, and various types of wastewater. Can be targeted.
- the present invention is particularly suitable for water treatment with RO membranes in the field of wastewater recovery, for example, cooling discharge from cooling equipment used in industrial processes such as building air conditioning, chemical industry, paper industry, steel industry, electric power industry, etc. water. Cooling effluent typically includes cooling tower blow water, but also includes all effluent discharged from a circulating cooling water system.
- part or all of the circulating cooling water may be withdrawn from the circulating pipe of the circulating cooling water system, treated with an RO membrane according to the present invention, and then returned to the circulating cooling water system.
- the raw water can be the discharged water that is branched from the piping that feeds the cooling water to the cooling water of the cooling tower or the filtering device for the circulating cooling water.
- it can be applied to water supply systems for boilers.
- the raw water may already contain the polymer-based scale dispersant used in the present invention. can be used as raw water
- the raw water can be used as RO membrane feed water as it is, but it may be subjected to a turbidity removal treatment as a pretreatment.
- turbidity removal there are no particular restrictions on the means of turbidity removal, but it is preferable to remove turbidity and colloidal components in the raw water that cause RO membrane contamination without affecting the water quality conditions of the RO membrane feed water described later. It is preferable to use a microfiltration (MF) membrane, an ultrafiltration (UF) membrane, a filter, a safety filter, or a strainer, as far as possible, and two or more of these may be used in combination. For example, after removing coarse turbidity and foreign matter with a strainer, turbidity removal treatment may be performed with a turbidity removal membrane such as an MF membrane or a UF membrane. can be prevented from being damaged by coarse turbidity and foreign matter.
- MF microfiltration
- UF ultrafiltration
- a turbidity removal membrane such as an MF membrane or a UF membrane.
- the RO membrane used in the present invention is preferably a polyamide-based RO membrane.
- the shape of the RO membrane there are no particular restrictions on the shape of the RO membrane, and any type such as a hollow fiber type and a spiral type can be used.
- Example 1 Well water having the water quality shown in Table 1 was passed through a reverse osmosis membrane device (manufactured by Kurita Water Industries Ltd.) at a recovery rate of 70 to 74%.
- Chemical 1 acrylic acid-based polymer (acrylic acid, acrylamidomethylpropanesulfonic acid, and N-substituted acrylamide copolymerized at a molar ratio of 85:10:5 with a weight average molecular weight of 10 ,000 terpolymer) was added at 1 mg/L as an acrylic polymer (Comparative Example 1).
- the recovery rate of the RO device was 70% from the 34th day after the start of water supply and from the 62nd to 76th day, and 74% from the 34th to 62nd day and from the 76th to 100th day. I drove with
- Fig. 1 shows flux
- Fig. 2 shows changes in RO module differential pressure.
- the flux was stable under all conditions, but an increase in the module differential pressure (the difference between the feed water pressure and the concentrated water pressure) was observed up to the 62nd day of treatment with chemical 1 (comparative example 1). After the 62nd day of treatment (Example 2), the rise in the module differential pressure was suppressed.
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Abstract
Description
体例としては、次亜塩素酸ナトリウム、次亜塩素酸カリウムなどの次亜塩素酸アルカリ金属塩、次亜塩素酸カルシウム、次亜塩素酸バリウムなどの次亜塩素酸アルカリ土類金属塩、亜塩素酸ナトリウム、亜塩素酸カリウムなどの亜塩素酸アルカリ金属塩、亜塩素酸バリウムなどの亜塩素酸アルカリ土類金属塩、亜塩素酸ニッケルなどの他の亜塩素酸金属塩、塩素酸アンモニウム、塩素酸ナトリウム、塩素酸カリウムなどの塩素酸アルカリ金属塩、塩素酸カルシウム、塩素酸バリウムなどの塩素酸アルカリ土類金属塩などを挙げることができる。これらの塩素系酸化剤は、1種を単独で用いても良く、2種以上を組み合わせて用いても良い。これらの中で、次亜塩素酸塩は取り扱いが容易であり、好適に用いることができる。
本発明において、水処理の対象となる原水としては特に制限はなく、RO膜による処理が適用されるすべての水に適用可能であり、工業用水、市水(水道水)、井戸水、各種排水を対象とすることができる。本発明は特に排水回収の分野におけるRO膜による水処理に好適であり、例えば、ビル空調や、化学工業、製紙工業、製鉄工業、電力工業等の工業プロセスにおいて使用される冷却設備からの冷却排出水が挙げられる。冷却排出水としては、代表的には、冷却塔のブロー水が挙げられるが、その他、循環冷却水系から排出されるすべての排出水が挙げられる。この場合、例えば、循環冷却水系の循環配管から循環冷却水の一部又は全部を引き抜いて本発明に従ってRO膜処理した後当該循環冷却水系に戻すようにしても良い。また、冷却塔の冷却水や循環冷却水の濾過装置に冷却水を送給する配管から分岐して排出した排出水を原水とすることもできる。その他、ボイラ用の給水システムに適用できる。
原水は、そのままRO膜給水とすることもできるが、前処理として除濁処理を行ってもよい。
本発明で用いるRO膜は、好ましくはポリアミド系RO膜である。RO膜の形状については特に制限はなく、中空糸型、スパイラル型など、いずれのものも使用可能である。
表1の水質を有する井水を逆浸透膜装置(栗田工業株式会社製)に70~74%の回収率で通水した。通水開始時から62日目までは薬品1(アクリル酸系ポリマー(アクリル酸とアクリルアミドメチルプロパンスルホン酸とN-置換アクリルアミドとを85:10:5のモル比で共重合させた重量平均分子量10,000のターポリマー)を含有する薬品)をアクリル酸系ポリマーとして1mg/L添加した(比較例1)。62日目から100日目までは薬品2(アクリル酸系ポリマー(アクリル酸とアクリルアミドメチルプロパンスルホン酸とを80:20のモル比で共重合させた重量平均分子量20,000の共重合体)とクロロスルファミン酸とを含有する薬品)をアクリル酸系ポリマーとして0.35mg/L、Cl2として0.5mg/L添加した(実施例1)。
表2の水質を有する水を逆浸透膜システム(栗田工業株式会社製)に回収率80%で通水した。スケール防止剤としてマレイン酸系ポリマー(無水マレイン酸と酢酸ビニルとアクリル酸アルキルエステルとを70:15:15のモル比で共重合させた重量平均分子量1,200の共重合体)及びアクリル酸系ポリマー(ポリアクリル酸、重量平均分子量3,000)の混合物をそれぞれポリマー成分として0.2mg/L及び0.3mg/L添加していたが、モジュール差圧の上昇が確認された。
表3の水質を有する水を逆浸透膜システム(栗田工業株式会社製)に回収率50%でで通水した。スケール抑制剤は添加せず、結合塩素系酸化剤(栗田工業株式会社製)をCl2として2mg/L添加したが、モジュール差圧の上昇が確認された。
本出願は、2021年12月15日付で出願された日本特許出願2021-203512に基づいており、その全体が引用により援用される。
Claims (9)
- アクリル酸系ポリマー及び/又はマレイン酸系ポリマーと、
結合塩素系酸化剤及び/又は結合臭素系酸化剤と
を被処理水中に存在させることを特徴とする逆浸透膜システムのシリカ汚染抑制方法。 - 前記アクリル酸系ポリマー及び/又はマレイン酸系ポリマーが、ポリアクリル酸、ポリマレイン酸、アクリル酸とアクリルアミドメチルプロパンスルホン酸の共重合体、アクリル酸とアクリルアミドメチルプロパンスルホン酸とN-置換アクリルアミドのターポリマー、アクリル酸とアリルオキシヒドロキシプロパンスルホン酸ナトリウムの共重合体、無水マレイン酸と酢酸ビニルとアクリル酸アルキルエステルの共重合体、無水マレイン酸とイソブチレンの共重合体よりなる群から選択される少なくとも1種のポリマーであることを特徴とする請求項1に記載のシリカ汚染抑制方法。
- 前記アクリル酸系ポリマーが、アクリル酸とアクリルアミドメチルプロパンスルホン酸の共重合体又はアクリル酸とアクリルアミドメチルプロパンスルホン酸とN-置換アクリルアミドのターポリマーであることを特徴とする請求項1に記載のシリカ汚染抑制方法。
- 前記アクリル酸系ポリマーが、アクリル酸(AA)とアクリルアミドメチルプロパンスルホン酸(AMPS)とを、AA:AMPS=50~99:1~50(モル比)の割合で共重合させた共重合体である請求項1~3のいずれかの逆浸透膜システムのシリカ汚染抑制方法。
- 前記アクリル酸系ポリマーの重量平均分子量が1000~50000である請求項1~4のいずれかの逆浸透膜システムのシリカ汚染抑制方法。
- 前記結合塩素系酸化剤がクロロスルファミン酸化合物であることを特徴とする請求項1~5のいずれかに記載のシリカ汚染抑制方法。
- 前記アクリル酸系ポリマー及び/又はマレイン酸系ポリマーを、被処理水中の濃度が0.1~5mg/Lとなるように被処理水に添加し、クロロスルファミン酸化合物を、被処理水中の濃度がCl2として0.1~10mg/Lとなるように被処理水に添加する、請求項1の逆浸透膜システムのシリカ汚染抑制方法。
- アクリル酸とアクリルアミドメチルプロパンスルホン酸の共重合体及び/又はアクリル酸とアクリルアミドメチルプロパンスルホン酸とN-置換アクリルアミドのターポリマーと、
結合塩素系酸化剤及び/又は結合臭素系酸化剤と、
を含有する、逆浸透膜システムのシリカ汚染抑制剤。 - 前記結合塩素系酸化剤がクロロスルファミン酸化合物であることを特徴とする請求項8に記載のシリカ汚染抑制剤。
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AU2022414602A AU2022414602A1 (en) | 2021-12-15 | 2022-12-08 | Silica contamination inhibition method and silica contamination inhibitor for reverse osmosis membrane system |
JP2023547180A JP7409573B2 (ja) | 2021-12-15 | 2022-12-08 | 逆浸透膜システムのシリカ汚染抑制法およびシリカ汚染抑制剤 |
KR1020237030264A KR20240122683A (ko) | 2021-12-15 | 2022-12-08 | 역침투막 시스템의 실리카 오염 억제법 및 실리카 오염 억제제 |
CN202280075409.2A CN118234559A (zh) | 2021-12-15 | 2022-12-08 | 逆渗透膜系统的二氧化硅污染抑制法及二氧化硅污染抑制剂 |
EP22907346.5A EP4450148A1 (en) | 2021-12-15 | 2022-12-08 | Silica contamination inhibition method and silica contamination inhibitor for reverse osmosis membrane system |
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JPS61107998A (ja) | 1984-10-31 | 1986-05-26 | Kurita Water Ind Ltd | スケ−ル防止剤 |
JPH0231894A (ja) | 1988-07-22 | 1990-02-01 | Mitsubishi Gas Chem Co Inc | 冷却水系のスケール防止剤 |
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