WO2022078672A1 - Verfahren zur aufbereitung eines mit organischen stoffen und anorganischen partikeln belasteten kühlkreislaufwassers - Google Patents
Verfahren zur aufbereitung eines mit organischen stoffen und anorganischen partikeln belasteten kühlkreislaufwassers Download PDFInfo
- Publication number
- WO2022078672A1 WO2022078672A1 PCT/EP2021/074450 EP2021074450W WO2022078672A1 WO 2022078672 A1 WO2022078672 A1 WO 2022078672A1 EP 2021074450 W EP2021074450 W EP 2021074450W WO 2022078672 A1 WO2022078672 A1 WO 2022078672A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cooling circuit
- circuit water
- bacteria
- organic substances
- cleaned
- Prior art date
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- 238000001816 cooling Methods 0.000 title claims abstract description 148
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 113
- 239000000126 substance Substances 0.000 title claims abstract description 40
- 239000010954 inorganic particle Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 22
- 241000894006 Bacteria Species 0.000 claims abstract description 65
- 238000010612 desalination reaction Methods 0.000 claims abstract description 45
- 238000005098 hot rolling Methods 0.000 claims abstract description 16
- 238000000926 separation method Methods 0.000 claims abstract description 12
- 230000000593 degrading effect Effects 0.000 claims abstract description 4
- 235000015097 nutrients Nutrition 0.000 claims description 22
- 238000001914 filtration Methods 0.000 claims description 11
- 239000008187 granular material Substances 0.000 claims description 10
- 238000000746 purification Methods 0.000 claims description 7
- 238000011033 desalting Methods 0.000 claims description 5
- 238000001223 reverse osmosis Methods 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 230000003750 conditioning effect Effects 0.000 claims description 3
- 238000002242 deionisation method Methods 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 230000005294 ferromagnetic effect Effects 0.000 claims description 3
- 238000007885 magnetic separation Methods 0.000 claims description 3
- 239000010409 thin film Substances 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract description 3
- 239000012528 membrane Substances 0.000 description 11
- 239000003139 biocide Substances 0.000 description 10
- 235000014593 oils and fats Nutrition 0.000 description 9
- 230000001070 adhesive effect Effects 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 230000003115 biocidal effect Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000005352 clarification Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 4
- 239000013505 freshwater Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 239000012876 carrier material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 241000894007 species Species 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 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 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- UCNNJGDEJXIUCC-UHFFFAOYSA-L hydroxy(oxo)iron;iron Chemical compound [Fe].O[Fe]=O.O[Fe]=O UCNNJGDEJXIUCC-UHFFFAOYSA-L 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011785 micronutrient Substances 0.000 description 1
- 235000013369 micronutrients Nutrition 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000029219 regulation of pH Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
- C02F1/004—Processes for the treatment of water whereby the filtration technique is of importance using large scale industrial sized filters
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- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- 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
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- C02F1/08—Thin film evaporation
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- C—CHEMISTRY; METALLURGY
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- 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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C—CHEMISTRY; METALLURGY
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F3/348—Biological treatment of water, waste water, or sewage characterised by the microorganisms used characterised by the way or the form in which the microorganisms are added or dosed
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- C—CHEMISTRY; METALLURGY
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M173/00—Lubricating compositions containing more than 10% water
- C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
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- C—CHEMISTRY; METALLURGY
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
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- C10M175/0058—Working-up used lubricants to recover useful products ; Cleaning by filtration and centrifugation processes; apparatus therefor
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
- C10M175/0066—Use of electrical and magnetical means
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
- C10M175/04—Working-up used lubricants to recover useful products ; Cleaning aqueous emulsion based
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- C—CHEMISTRY; METALLURGY
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4691—Capacitive deionisation
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- 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
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/023—Water in cooling circuits
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/004—Apparatus and plants for the biological treatment of water, waste water or sewage comprising a selector reactor for promoting floc-forming or other bacteria
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- C—CHEMISTRY; METALLURGY
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- C02F2301/043—Treatment of partial or bypass streams
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- C—CHEMISTRY; METALLURGY
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2301/046—Recirculation with an external loop
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- C—CHEMISTRY; METALLURGY
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2307/00—Location of water treatment or water treatment device
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/20—Metal working
- C10N2040/24—Metal working without essential removal of material, e.g. forming, gorging, drawing, pressing, stamping, rolling or extruding; Punching metal
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
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- C10N2040/242—Hot working
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
- F28F2025/005—Liquid collection; Liquid treatment; Liquid recirculation; Addition of make-up liquid
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- 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
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- 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
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- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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- 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
- Y02A20/152—Water filtration
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Definitions
- the present invention relates to a method and a plant for the treatment of cooling circuit water contaminated with organic substances and inorganic particles in industrial plants, in particular a hot rolling mill.
- Desalination plants are used for this purpose, in which the desalination water is purified using reverse osmosis. It has been shown that although high-quality water can be recovered with a high yield, the membranes used have a greatly reduced service life, so that the operational stability of the desalination plants is endangered.
- the object of the present invention is therefore to provide a method and a system which overcome the disadvantages of the prior art.
- the present invention is based on the object of providing a method and a plant that improves the service life of membranes used in the desalination plant.
- the object is achieved according to a first aspect with the features of patent claim 1 and according to a second aspect with the
- the present invention relates to a method for treating cooling circuit water contaminated with organic substances and inorganic particles in industrial plants, in particular a hot rolling mill.
- the method here comprises the steps: a) separating the organic substances and the inorganic particles from the cooling circuit water, so that a pre-cleaned cooling circuit water is obtained, b) cooling the pre-cleaned cooling circuit water via an open cooling tower, so that a cooled, pre-cleaned cooling circuit water is obtained, c ) Desalination of at least a partial volume flow of the cooled, pre-cleaned cooling circuit water by means of an at least one-stage desalination plant, so that a cleaned cooling circuit water is obtained, and d) adding bacteria that are suitable for degrading the organic substances in the cooling circuit water, the bacteria being present in the cooling circuit water before the Separation according to step a), before cooling according to step b) and/or before desalting according to step c), so that a biological cleaning stage is formed.
- the service life of the membranes used in the desalination plant can be significantly increased by adding the bacteria to the cooling circuit water.
- the service life of the membranes could advantageously be increased by at least 600%, particularly preferably by at least 900%, and very particularly preferably by at least 1200% compared to a conventional pretreatment of blowdown water.
- a granulate which is available from the applicant under the product name “Oilco-Bacteria” can be used as a bacterial culture.
- the present invention is based on the essential finding that the organic substances and inorganic particles contained in the cooling circuit water are not completely removed by means of the conventional separation according to step a) and the fraction remaining in the cooled, pre-cleaned cooling circuit water (desalination water), which is at least as a partial volume flow of the at least one-stage desalination plant, the membranes become blocked to such an extent that the observed, greatly reduced service lives occur.
- the organic substances in particular oils and fats, combine with the inorganic-containing particles solid in the cooling circuit water, in particular scale, which consists predominantly of iron (II, III) oxide, to form highly adhesive fine stagglomerates that irreversibly block the membranes.
- the scale which has a particle size of 500 nm to 3000 nm in the desalination water, is coated with the oils and fats.
- the bacteria added to the cooling circuit form biocenoses in one or more areas of the cooling circuit, in which the bacteria settle and break down or metabolize the organic substances, in particular the oils and fats, which are responsible for the adhesive properties of the fine agglomerates.
- a biocenosis within the meaning of the present invention is a community of organisms in a defined habitat (biotope), the biocenosis and the biotope together forming an ecosystem.
- the bacteria are added to the cooling circuit water before the separation according to step a), before the cooling according to step b) and/or before the desalination according to step c).
- the bacteria can thus be added locally to the cooling circuit water or distributed over the entire cooling circuit in order to form the biological cleaning stage. If the bacteria are added over the entire cooling circuit, there is the advantage that any aggregates of the cooling circuit remain largely free of the sticky deposits, which usually have to be removed from the entire cooling circuit at regular intervals and disposed of separately. The removal of these deposits, which include the organic substances and the inorganic particles, can thus be saved, which has an advantageous effect on the ongoing operating costs of the plant.
- addition of biocide to the cooling circuit water is excluded, since the biocide would then destroy the biocenosis formed by the bacteria.
- adding a biocide to the remaining main volume flow can be advantageous.
- the main volume flow of the cooled, pre-cleaned cooling circuit water, which is conveyed in the cooling circuit section from the open cooling tower via a main line to the industrial plant is preferably 1000 to 30,000 m 3 per hour.
- the partial volume flow of the chilled pre-cleaned cooling circuit water via a bypass line from the main volume flow of at least one-stage Desalination plant is fed is preferably 25 to 500 m 3 per hour, more preferably 50 to 200 m 3 per hour.
- the invention provides a system for the treatment of cooling circuit water contaminated with organic substances and inorganic particles in industrial systems, in particular a hot rolling mill.
- the system according to the invention comprises: a) a separation device for separating the organic substances and the inorganic particles from the cooling circuit water in order to obtain a pre-cleaned cooling circuit water, b) an open cooling tower, via which the pre-cleaned cooling circuit water can be cooled, c) an at least single-stage desalination plant, with which at least a partial volume flow of the cooled, pre-cleaned cooling circuit water can be desalinated in order to obtain cleaned cooling circuit water, and d) a dosing device for adding bacteria that are suitable for decomposing the organic substances in the cooling circuit water, the dosing device upstream of the separating device is arranged the cooling tower and / or in front of the desalination plant, so that a biological purification stage can be formed.
- a residual amount of the organic substances and/or inorganic particles contained in the partial volume flow of the cooled, pre-cleaned cooling circuit water (bleed water) is separated off. If the concentration of the solid inorganic particles released is too high for the subsequent desalination, this can advantageously be separated off first.
- the solid inorganic particles which have been released are preferably separated off in step b1) gravimetrically. Due to the ferromagnetic properties of the inorganic particles, it is particularly preferred that the separation according to step b1) takes place by means of magnetic separation. through the previous one By separating the inorganic particles, the desalination membranes are protected and can be used for longer, which has a beneficial effect on operating costs.
- nutrients are added to the cooling circuit water before step a) before cooling according to step b) and/or before desalination according to step c), which promote the growth of the added bacteria.
- the added nutrients promote the formation of the biocenosis by the bacteria and also promote their long-term existence. Provision is preferably made here for the ratio of added bacteria to the added nutrients to be reduced over time.
- the bacteria are added as a function of the formation of the biocenosis.
- a higher concentration of bacteria is advantageous for the initial development of the biocenosis in a cooling circuit.
- a particularly preferred mixture of added bacteria and added nutrients thus contains 1% by weight of bacteria and 99% by weight of nutrients.
- an increased nutrient concentration is advantageous for maintaining a biocenosis that has already developed. The concentration of added bacteria thus falls below 1% by weight as the application time increases, with more than 99% by weight of nutrients being supplied at the same time.
- the bacteria are pure cultures of specifically oil and fat-degrading species. Some should be able to grow under anaerobic conditions in order to exist in a settling tank and deeper layers of a clarifier, other species must be able to live aerobically in order to also be able to remove oils and fats in the cooling tower and on the surface of the clarifier.
- the nutrients are primarily nitrogen and phosphorus, with sulfur, potassium, magnesium and/or sodium also being used.
- a micronutrient blend may also be included in the concentrate. This is a mixture of metals such as copper, nickel, cobalt, manganese, molybdenum, tungsten, zinc and/or tungsten, possibly supplemented with boron, silicon and/or selenium and possibly other elements and/or amino acids.
- the iron commonly found in bacterial media is not required as it is present in sufficient concentration in the refrigeration cycle, as is calcium.
- the bacteria and/or the nutrients are provided in the form of granules and added to the cooling circuit water within a cooling circuit in the form of an aqueous solution.
- the granules contain the bacteria and/or the nutrients in a concentrated form, which reduces storage requirements.
- the granules are expediently dissolved in water.
- the water is advantageously first heated to a temperature comparable to that of the cooling circuit water. Then the granules are added and the solution is prepared. After a maturing time of 3 to 6 hours, the solution is added to the cooling circuit water. It has been shown here that the spread of bacteria and/or nutrients in the cooling circuit is significantly improved.
- the bacteria in the granules are in the form of lyophilized bacteria.
- Lyophilized bacteria freeze-dried bacteria
- the cooling circuit water contaminated with the organic substances and the inorganic particles is conducted according to step a) through a settling basin, a clarification basin and/or a filtration device.
- these Cooling circuit water with different environmental requirements in particular anaerobic, anoxic and/or aerobic, can be added.
- the bacteria spread according to the respective milieu and form a biocenosis in the respective parts of the plant.
- the cooling circuit water cleaned according to step c), ie the desalinated desalination water is fed to the industrial plant, optionally after conditioning.
- the industrial plant can also be operated in regions that do not have a receiving water in the immediate vicinity.
- conditioning of the desalinated desalted water refers to the addition of corrosion inhibitors and, if necessary, alkalis for pH regulation.
- Desalting after step c) preferably takes place by means of reverse osmosis, by means of capacitive deionization or by means of thin-film evaporation.
- the desalination plant is designed at least in one stage. However, it is preferably provided that the desalination plant is designed in one to two stages or four stages.
- the bacteria are only added to the partial volume flow of the cooled, pre-cleaned cooling circuit water.
- the system has a dosing device arranged in a bypass line fluidically connecting the cooling tower to the at least one-stage desalination system.
- the partial volume flow, before the desalination in step c) is passed through a reactor that is used to form the biological purification stage.
- the reactor is preferably designed as a biological fixed bed reactor, trickling filter or trickle bed reactor.
- the reaction chamber of the respective reactor is filled with a suitable carrier material and can be flowed through.
- Fixed-bed reactors have a very high space turnover rate and also combine the biological metabolic activity with the filtration effect of the carrier material as a depth filter, so that the oils and fats are initially retained inside the bed and then metabolized by the bacteria.
- the bacteria form a biofilm on the surface of the carrier material, as a result of which the bacteria are at least partially protected from biocides and other bacteria-damaging influences.
- the invention is not limited to systems of the hot rolling mill shown in more detail here, but can in principle also be used in other branches of industry, such as systems in the food industry, refineries, chemistry and pharmacy.
- 1 shows a schematic representation of a system for the treatment of cooling circuit water contaminated with organic substances and inorganic particles according to a first embodiment variant
- 2 shows a schematic representation of a system for the treatment of cooling circuit water contaminated with organic substances and inorganic particles according to a second embodiment variant
- FIG. 3 shows a schematic representation of a system for treating cooling circuit water contaminated with organic substances and inorganic particles according to a third embodiment
- FIG. 4 shows a schematic representation of a system for treating cooling circuit water contaminated with organic substances and inorganic particles according to a fourth embodiment.
- the system 1 shown in FIG. 1 comprises a hot rolling mill 2 in the embodiment shown here, to which a cooling circuit 3 is connected.
- the cooling circuit 3 comprises a plurality of units which are each fluidly connected to one another and are explained in more detail below.
- the hot rolling mill 2 is first coupled to the cooling circuit 3, so that cooling circuit water used up in the hot rolling mill 2 and contaminated with organic substances, such as oils and fats, as well as inorganic particles, such as in particular scale, is processed by the units arranged in the cooling circuit 3 is that it can be fed directly to the hot rolling mill 2 again. If the amount of cooling circuit water falls below a specific volume, additional fresh water can be added to the cooling circuit 3 via a fresh water inlet 4 . If necessary, biocides, hardness stabilizers, flocculants and precipitating agents and other additives can be added to this.
- the system 1 shown in FIG. 1 initially comprises a separating device 5 for separating the organic substances and the inorganic particles from the cooling circuit water of the hot rolling mill 2, so that a pre-cleaned cooling circuit water is obtained.
- the separating device 5 comprises the Separating device 5 more series-connected components.
- the separating device 5 comprises a settling tank 6 for separating a coarse fraction of a mixture of organic substances and inorganic particles, a clarification tank 7 for separating an average size of the mixture of organic substances and inorganic particles, and a filtering device 8, which is usually includes a large number of filter units.
- the separating device 5 comprises a settling tank 6 for separating a coarse fraction of a mixture of organic substances and inorganic particles, a clarification tank 7 for separating an average size of the mixture of organic substances and inorganic particles, and a filtering device 8, which is usually includes a large number of filter units.
- two filter units 9, 10 connected in parallel of the plurality of filter units of the filter device 8 are shown as an example. In both
- the system 1 shown in FIG. 1 comprises an open cooling tower 11, via which the pre-cleaned cooling circuit water can be cooled.
- the pre-cleaned cooling circuit water is sprayed in the cooling tower 11 so that an aerosol is formed, which then condenses and cools down in the process.
- the cooled, pre-cleaned cooling circuit water (so-called desalination water) that is then obtained is divided into a main volume flow and a partial volume flow.
- the main volume flow is fed to the hot rolling mill 2 via a main line 12 .
- the partial volume flow is fed via a bypass line 13 to an at least single-stage desalination plant 14 and desalinated in order to obtain a cleaned cooling circuit water, which is then fed to the hot rolling mill 2 via a return line 15 .
- Another advantage is that the system 1 can also be operated in regions that have little ground or river water in the immediate vicinity.
- the desalination is preferably carried out according to the principle of reverse osmosis, capacitive deionization or thin-film evaporation.
- the system 1 also includes a dosing device 16 for adding bacteria that are suitable for degrading the organic substances in the cooling circuit water.
- the bacteria are in the form of lyophilized bacteria.
- the dosing device 16 can be arranged in front of the separating device 5, in front of the cooling tower 11 and/or in front of the desalination plant 14.
- the dosing device 16 can also be arranged within the separating device 5 in front of the settling tank 6, in front of the clarification tank 7 and/or in front of the filtering device 8 (not shown).
- the system 1 comprises a first dosing device 17 arranged in front of the separating device 5 and a second dosing device 18 arranged in front of the cooling tower 11, via which the bacteria are added to the cooling circuit 3.
- the service life of the membranes (not shown) used in the desalination plant 14 is significantly increased. This is due to the fact that the organic substances contained in the cooling circuit water, in particular oils and fats, and inorganic particles, in particular scale, which consists predominantly of iron (II, 11 l) oxide, form highly adhesive fine agglomerates, which are separated by the separating device 5 cannot be completely removed.
- the bacteria added to the cooling circuit 3 break down or metabolize the organic substances, in particular the oils and fats, which are responsible for the adhesive property of the fine agglomerates, so that the scale particles then bare in the cooling circuit water do not penetrate the membranes due to the lack of adhesive properties can block more.
- Nutrients which promote the growth of the added bacteria, are also added to the cooling circuit 3 via the two metering devices 17, 18.
- the added nutrients promote the formation of a biocenosis by the bacteria and also promote their long-term existence. Provision is preferably made here for the ratio of added bacteria to the added nutrients to be reduced over time.
- the bacteria are added as a function of the formation of a biocenosis.
- a higher concentration of bacteria is advantageous for the initial formation of a biocenosis in the cooling circuit 3 .
- a particularly preferred mixture of added bacteria and added nutrients contains 1% by weight bacteria and 99% by weight nutrients.
- an increased nutrient concentration is advantageous for maintaining a biocenosis that has already developed.
- the concentration of added bacteria thus falls below 1% by weight as the application time increases, with more than 99% by weight of nutrients being supplied at the same time.
- the bacteria and the nutrients are provided in the form of granules and added to the cooling circuit water within a cooling circuit 3 in the form of an aqueous solution via the two metering devices 17 , 18 .
- the bacteria presently added to the cooling circuit water have different environmental requirements. So the settling tank 6 becomes anaerobic, the Clarifier tank 7 operated anaerobically or aerobically, the filtration device 8 anoxically and aerobically and the cooling tower 11 operated aerobically.
- FIG. 2 shows a second embodiment of the system 1 according to the invention.
- the system 1 includes a second separating device 19 which is arranged in the bypass line 13 between the cooling tower 11 and the desalination system 14 .
- the concentration of the released solid scale particles in the desalting water is too high for the subsequent desalination, they can advantageously be separated first by means of the second separating device 19 .
- the separation can also take place by means of magnetic separation in addition to the usual sedimentation.
- the desalination membranes are protected and can be used for longer, which has a beneficial effect on operating costs.
- Figure 3 shows a third embodiment of the system 1 according to the invention.
- the bacteria are added locally to the cooling circuit water via a third dosing device 20 .
- the bacteria are only added to the partial volume flow of the blowdown water according to the present embodiment variant in order to remove the organic substances, in particular oils and fats, and inorganic particles, in particular scale, which consists predominantly of iron (II, III) oxide to dissolve highly adhesive fine stagglomerates for the downstream desalination.
- the system 1 comprises a reactor 21 which is arranged downstream of the third dosing device 20 and in which the biocenosis develops.
- the reactor 21 in the embodiment shown here is a biological fixed-bed reactor.
- the cooling circuit formed upstream of the third dosing device 20 is not subject to any biological purification, in the present illustrated embodiment on the two metering devices 17, 18 added biocides and other additives.
- the biocides are metered into the cooling circuit at intervals.
- the bypass line 13 and the return line 15 are advantageously blocked via a shut-off valve (not shown) until the concentration peak has distributed in the system after about 3 hours and has reached a stable value Has.
- FIG. 4 shows a fourth embodiment variant of the system 1 according to the invention, which, in contrast to the previous embodiment variant (FIG. 3), includes a second separating device 19 for removing the inorganic scale components, analogous to the embodiment variant shown in FIG. Line 13 is arranged downstream of the reactor 21 and serves to relieve the desalination stages.
- the invention is not limited to the combinations of features defined in the independent claims, but can also be defined by any other combination of specific features of all the individual features disclosed overall. This means that in principle practically every individual feature of the independent claims can be omitted or replaced by at least one individual feature disclosed elsewhere in the application. In this respect, the independent claim is to be understood merely as a first attempt at formulating the present invention.
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- Environmental & Geological Engineering (AREA)
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Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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CN202180070149.5A CN116419966A (zh) | 2020-10-16 | 2021-09-06 | 用于处理夹杂有机物和无机粒子的冷却循环水的方法 |
KR1020237013789A KR20230074769A (ko) | 2020-10-16 | 2021-09-06 | 유기 물질 및 무기 입자로 오염된 냉각용 순환수의 처리 방법 |
EP21773348.4A EP4229013A1 (de) | 2020-10-16 | 2021-09-06 | Verfahren zur aufbereitung eines mit organischen stoffen und anorganischen partikeln belasteten kühlkreislaufwassers |
US18/249,153 US20230406745A1 (en) | 2020-10-16 | 2021-09-06 | Method of treating a cooling circuit water contaminated with organic substances and inorganic particles |
JP2023522969A JP2023546404A (ja) | 2020-10-16 | 2021-09-06 | 有機物及び無機粒子を負荷された冷却回路水を処理するための方法 |
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DE102020213077.9A DE102020213077A1 (de) | 2020-10-16 | 2020-10-16 | Verfahren zur Aufbereitung eines mit organischen Stoffen und anorganischen Partikeln belasteten Kühlkreislaufwassers |
DE102020213077.9 | 2020-10-16 |
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EP (1) | EP4229013A1 (de) |
JP (1) | JP2023546404A (de) |
KR (1) | KR20230074769A (de) |
CN (1) | CN116419966A (de) |
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KR20230074769A (ko) | 2023-05-31 |
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JP2023546404A (ja) | 2023-11-02 |
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