CN115340236A - Electroplating effluent zero release processing system - Google Patents
Electroplating effluent zero release processing system Download PDFInfo
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- CN115340236A CN115340236A CN202210719494.3A CN202210719494A CN115340236A CN 115340236 A CN115340236 A CN 115340236A CN 202210719494 A CN202210719494 A CN 202210719494A CN 115340236 A CN115340236 A CN 115340236A
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- wastewater
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- nickel
- chromium
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- 238000009713 electroplating Methods 0.000 title claims abstract description 36
- 238000012545 processing Methods 0.000 title description 2
- 239000002351 wastewater Substances 0.000 claims abstract description 245
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 137
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 69
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 65
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 53
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 53
- 239000011651 chromium Substances 0.000 claims abstract description 53
- 238000004064 recycling Methods 0.000 claims abstract description 37
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 30
- 239000011701 zinc Substances 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 24
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims abstract description 23
- 208000028659 discharge Diseases 0.000 claims abstract description 19
- 239000000126 substance Substances 0.000 claims abstract description 15
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims abstract description 10
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 126
- 239000010802 sludge Substances 0.000 claims description 72
- 238000005189 flocculation Methods 0.000 claims description 60
- 230000016615 flocculation Effects 0.000 claims description 60
- 238000001556 precipitation Methods 0.000 claims description 49
- 238000007254 oxidation reaction Methods 0.000 claims description 42
- 230000003647 oxidation Effects 0.000 claims description 36
- 230000001105 regulatory effect Effects 0.000 claims description 27
- 239000003921 oil Substances 0.000 claims description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 229910001385 heavy metal Inorganic materials 0.000 claims description 22
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 229910052782 aluminium Inorganic materials 0.000 claims description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 239000012528 membrane Substances 0.000 claims description 14
- 230000018044 dehydration Effects 0.000 claims description 13
- 238000006297 dehydration reaction Methods 0.000 claims description 13
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- 239000003513 alkali Substances 0.000 claims description 12
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 claims description 12
- 238000004062 sedimentation Methods 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 238000005188 flotation Methods 0.000 claims description 10
- 239000013505 freshwater Substances 0.000 claims description 10
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 9
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 239000000839 emulsion Substances 0.000 claims description 9
- 150000002500 ions Chemical class 0.000 claims description 9
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
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- 239000010949 copper Substances 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 7
- 230000008020 evaporation Effects 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 150000003839 salts Chemical class 0.000 claims description 7
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 7
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 238000005868 electrolysis reaction Methods 0.000 claims description 6
- 239000003344 environmental pollutant Substances 0.000 claims description 6
- 239000008394 flocculating agent Substances 0.000 claims description 6
- 239000007800 oxidant agent Substances 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 6
- 231100000719 pollutant Toxicity 0.000 claims description 6
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 239000000701 coagulant Substances 0.000 claims description 3
- 238000005345 coagulation Methods 0.000 claims description 3
- 230000015271 coagulation Effects 0.000 claims description 3
- 230000036571 hydration Effects 0.000 claims description 3
- 238000006703 hydration reaction Methods 0.000 claims description 3
- 231100000053 low toxicity Toxicity 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 235000010265 sodium sulphite Nutrition 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 2
- 239000010865 sewage Substances 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 229920002401 polyacrylamide Polymers 0.000 description 9
- 230000036961 partial effect Effects 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 231100000331 toxic Toxicity 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000002516 radical scavenger Substances 0.000 description 2
- 208000005623 Carcinogenesis Diseases 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000036952 cancer formation Effects 0.000 description 1
- 231100000504 carcinogenesis Toxicity 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000007918 pathogenicity Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
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- C22B15/0063—Hydrometallurgy
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
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- C22B19/20—Obtaining zinc otherwise than by distilling
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
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- C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/0015—Obtaining aluminium by wet processes
- C22B21/0023—Obtaining aluminium by wet processes from waste materials
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- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
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- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
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- C22B34/32—Obtaining chromium
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- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
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- C22B7/006—Wet processes
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- C02F1/00—Treatment of water, waste water, or sewage
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Abstract
The invention relates to an electroplating wastewater zero-discharge treatment system, which comprises: the first wastewater treatment subsystem is used for treating the oily wastewater to produce pretreated effluent; the second wastewater treatment subsystem is used for treating the chromium-containing wastewater to produce pretreated effluent; the third waste water treatment subsystem is used for treating chemical nickel wastewater, nickel-containing wastewater and zinc-nickel-containing wastewater to produce pretreated effluent; the fourth wastewater treatment subsystem is used for treating mixed wastewater, cyanide-containing wastewater and initial rainwater to produce pretreated effluent; the fifth wastewater treatment subsystem is used for treating nitrogen-containing wastewater, zinc-containing wastewater and comprehensive wastewater to produce pretreated effluent; and the sixth wastewater treatment system is used for carrying out deepening treatment on the pretreated effluent and recycling the pretreated effluent. The beneficial effects of the invention are: can recycle the waste water generated in the electroplating process and reduce the pollution of the sewage to the environment.
Description
Technical Field
The invention relates to the technical field of electroplating wastewater treatment, in particular to an electroplating wastewater zero-discharge treatment system.
Background
Electroplating wastewater is generated in electroplating lines for various products. The electroplating wastewater is generally divided into: oily wastewater, chromium-containing wastewater, chemical nickel wastewater, nickel-containing wastewater, zinc-nickel-containing wastewater, cyanogen-containing wastewater, mixed wastewater (mainly generated by leakage), nitrogen-containing wastewater, zinc-containing wastewater, and comprehensive wastewater (mainly acid pickling wastewater and alkali washing wastewater). The main characteristic pollutants of the electroplating wastewater are toxic heavy metals and cyanides and some grease, and the toxic heavy metals mainly comprise: gold, silver, copper, zinc, nickel, chromium, and the like. Toxic heavy metals in the electroplating wastewater can cause carcinogenesis and pathogenicity, have the effects of inhibiting and even sterilizing organisms, and can cause water poisoning and influence the ecological environment when being discharged into water. In the prior art, a method for effectively recycling the waste water generated in the electroplating process is lacked, so that fresh water needs to be frequently supplemented in the electroplating process, and the utilization rate of water resources is low.
Disclosure of Invention
In order to overcome at least part of defects in the prior art, the embodiment of the invention provides an electroplating wastewater zero-discharge treatment system, which can recycle wastewater generated in an electroplating process and reduce pollution of sewage to the environment.
The invention relates to an electroplating wastewater zero-discharge treatment system, which comprises:
the first wastewater treatment subsystem is used for treating the oily wastewater, removing oil components in the oily wastewater and producing pretreated effluent;
the second wastewater treatment subsystem is used for treating the chromium-containing wastewater to remove chromium elements in the chromium-containing wastewater and produce pretreated effluent;
the third waste water treatment subsystem is used for treating chemical nickel wastewater, nickel-containing wastewater and zinc-nickel-containing wastewater to produce pretreated effluent;
the fourth wastewater treatment subsystem is used for treating mixed drainage wastewater, cyanide-containing wastewater and initial rainwater to produce pretreated effluent;
the fifth wastewater treatment subsystem is used for treating nitrogen-containing wastewater, zinc-containing wastewater and comprehensive wastewater to produce pretreated effluent;
the sixth wastewater treatment system is respectively connected with the water outlets of the first wastewater treatment subsystem, the second wastewater treatment subsystem, the third wastewater treatment subsystem, the fourth wastewater treatment subsystem and the fifth wastewater treatment subsystem, and is used for carrying out advanced treatment on the pretreated outlet water, and the treated fresh water is conveyed to the advanced reclaimed water reuse system for recycling;
the sixth wastewater treatment system comprises a regulating tank, an MVR evaporation system and an RO system which are sequentially connected, wherein the regulating tank is used for adding a pH regulating agent to regulate pretreated effluent water in the regulating tank to be neutral or weakly alkaline, the pretreated effluent water enters the MVR evaporation system after being regulated by the regulating tank, evaporated heavy metal-containing waste salt is separated and treated independently, condensate liquid is filtered by the RO system to intercept most light-component organic matters in the water, concentrated water containing the light-component organic matters flows back to the regulating tank, and fresh water is input into the deep reclaimed water recycling system. The deep reclaimed water recycling system and the whole system adopt the principle of quality-based classified collection and treatment and determine the step recycling of the electroplating wastewater according to the recycling water quality requirements of different working sections
Further, the first wastewater treatment subsystem comprises an oily wastewater collection tank, a demulsification and air flotation integrated device, an air flotation effluent collection tank, a UF and RO system, an oily wastewater flocculation and precipitation integrated device, an oily sludge concentration tank and an oily sludge plate-and-frame filter press which are sequentially connected, and the UF and RO system is connected with the front-end reclaimed water recycling system through a water outlet pipeline.
Furthermore, the second wastewater treatment subsystem comprises a chromium-containing wastewater collection tank, a UF and RO system, a high-concentration chromium-containing wastewater collection tank, a reduction flocculation precipitation integrated device, a chromium-containing sludge concentration tank and a chromium-containing sludge plate-and-frame filter press, and the UF and RO system is connected with the front-end reclaimed water recycling system through a water outlet pipeline.
Furthermore, the third waste water treatment subsystem comprises an oxidation complex breaking system, a nickel-containing and chemical nickel-containing wastewater collecting pool, a UF and RO system, a high-concentration nickel-containing wastewater collecting pool, flocculation and precipitation integrated equipment, a nickel-containing sludge concentrating tank and a nickel-containing sludge plate-and-frame filter press, wherein the UF and RO system is connected with the front-end reclaimed water recycling system through a water outlet pipeline.
Further, the fourth wastewater treatment subsystem comprises an initial rainwater, cyanide-containing wastewater and mixed wastewater collection tank, a UF and RO system, a primary oxidation treatment system, a secondary oxidation treatment system, a primary flocculation sedimentation tank, a secondary flocculation sedimentation tank, a sludge concentration tank containing iron, zinc, aluminum and nickel, and a sludge plate-and-frame filter press containing iron, zinc, aluminum and nickel, wherein the UF and RO system is connected with the front-end reclaimed water reuse system through a water outlet pipeline, and the output of the sludge plate-and-frame filter press containing iron, zinc, aluminum and nickel pretreats effluent;
further, the fifth wastewater treatment subsystem comprises a comprehensive wastewater collection tank, a UF and RO system, a centrifugal electrolysis cyclone device, a primary flocculation sedimentation tank, a secondary flocculation sedimentation tank, a comprehensive sludge concentration tank and a comprehensive sludge plate-and-frame filter press, and the UF and RO system is connected with the front-end reclaimed water reuse system through a water outlet pipeline.
A zero-discharge treatment method of electroplating wastewater is applied to the electroplating wastewater zero-discharge treatment system and is characterized by comprising the following steps of:
after the oily wastewater is collected, lifting the oily wastewater to demulsification and air flotation integrated equipment, adding a demulsifier to dehydrate oil droplets, reducing free water molecules in emulsion, and damaging a hydration layer of the oil droplets in the emulsion to convert emulsified oil into dispersed oil; adding PAM and PAC to adsorb oils to obtain air-floated effluent, mixing the air-floated effluent with pure water concentrated water in a plant area, then feeding the air-floated effluent into an UF and RO system, feeding the produced water of the UF and RO system into a front-end reclaimed water recycling system, feeding the concentrated water into an oily wastewater flocculation and precipitation integrated device, adding liquid caustic soda and a flocculating agent to perform flocculation and precipitation to remove suspended matters in wastewater, simultaneously adding sodium hypochlorite to oxidize water to convert into ammonia nitrogen, removing a salt water collecting pool from clear liquid after flocculation and precipitation, feeding the generated sludge into an oily sludge concentration tank and an oily sludge plate-and-frame filter press to perform near-step dehydration, and then performing centralized treatment.
Further, still include: collecting low-concentration chromium-containing wastewater through a chromium-containing wastewater collecting tank, lifting the low-concentration chromium-containing wastewater to a UF and RO system, enabling produced water to enter a front-end reclaimed water recycling system, enabling concentrated water and the high-concentration chromium-containing wastewater to enter reduction flocculation precipitation integrated equipment, enabling the wastewater to enter a reduction tank, sequentially adding sulfuric acid into a reaction tank because chromium in the wastewater mainly exists as hexavalent chromium, controlling the addition of the sulfuric acid through a pH controller, adjusting the pH value to an appropriate value, adding sodium sulfite as a reducing agent, reducing the hexavalent chromium contained in the wastewater into low-toxicity trivalent chromium, adding sodium hydroxide to adjust the wastewater to be alkaline, adding PAC, PAM and a heavy metal catching agent to perform flocculation reaction to generate chromium precipitates, further separating chromium elements from the wastewater through precipitation, simultaneously adding ammonia nitrogen in sodium hypochlorite oxidation water to perform pretreatment on ammonia nitrogen, discharging the treated wastewater to an adjusting tank, enabling the generated sludge to enter a chromium-containing sludge concentrating tank and a chromium-containing sludge plate-and frame filter press for further dehydration and then performing centralized treatment.
Further, still include: after chemical nickel wastewater is collected through an oxidation complex breaking system, after a nickel complex is removed through sodium hypochlorite oxidation in the oxidation complex breaking system, then the chemical nickel wastewater treated by the oxidation complex breaking system, low-concentration nickel-containing wastewater and zinc-containing nickel wastewater enter an UF and RO system together, water produced by the UF and RO system enters a front-end reclaimed water recycling system, concentrated water and high-concentration nickel-containing wastewater enter a flocculation and precipitation integrated device together, a coagulant is added into a coagulation and precipitation device to adjust the pH value, and then a heavy metal ion trapping agent is added to remove nickel in the wastewater, the treated wastewater is discharged into a regulating tank, and the produced sludge enters a nickel-containing sludge concentration tank and a nickel-containing sludge plate-and-frame filter press to be subjected to concentration treatment after near-step dehydration.
Further, still include: collecting cyanide-containing wastewater, mixed drainage wastewater and initial rainwater, and then respectively pretreating characteristic pollutants before cyanide breaking according to water quality conditions;
the method comprises the following steps of (1) setting a demulsification and air floatation integrated device for demulsification and oil removal, wherein the mixed wastewater has high content of petroleum substances and is easy to block a membrane system; mixing the demulsified waste water with cyanide-containing waste water and initial rainwater, and pumping the mixture into a UF and RO membrane system for membrane concentration; the produced water after passing through the membrane system enters a front-end reclaimed water recycling system, and concentrated water enters a two-stage oxidation cyanogen breaking system;
the method comprises the following steps of enabling cyanide-containing wastewater to enter a primary pH adjusting tank, adding alkali to adjust the pH value to 10-11, then overflowing into a primary oxidation tank, adding an oxidant under the stirring condition, carrying out primary oxidation reaction, enabling the wastewater to overflow into a secondary pH adjusting tank after primary oxidation, adding acid to adjust the pH value to 8-8.5, then overflowing into a secondary oxidation tank, adding the oxidant under the stirring condition, carrying out secondary oxidation reaction, finally overflowing into a drainage tank, breaking cyanogen, entering a two-stage flocculation precipitation tank, adjusting the pH value respectively, adding a flocculating agent and a heavy metal catching agent to carry out flocculation reaction, adding liquid alkali to the primary flocculation precipitation to control the pH value to be less than or equal to 8, precipitating zinc and aluminum in the wastewater, and carrying out secondary flocculation precipitation on nickel in the wastewater;
the method comprises the steps that the comprehensive wastewater collection pool is used for collecting and mixing nitrogen-containing wastewater, zinc-containing wastewater and comprehensive wastewater, the nitrogen-containing wastewater, the zinc-containing wastewater and the comprehensive wastewater enter the UF and RO systems together, produced water enters the front-end reclaimed water recycling system, and concentrated water enters the centrifugal electrolysis cyclone device for treatment and copper recovery in the wastewater;
performing two-stage flocculation precipitation after copper removal, adding liquid alkali to the first-stage flocculation precipitation to control the pH to be less than or equal to 8, adding PAC (polyaluminium chloride), PAM (polyacrylamide) and a heavy metal ion scavenger to precipitate zinc and aluminum in the wastewater, and adding liquid alkali to the second-stage flocculation precipitation to control the pH to be less than or equal to 10, and adding PAM and the heavy metal ion scavenger to precipitate nickel in the wastewater;
and discharging the treated wastewater to a regulating tank, and allowing the generated sludge to enter a comprehensive sludge concentration tank and a comprehensive sludge plate-and-frame filter press for further dehydration and then performing centralized treatment.
The invention has the advantages that: the method is characterized in that a quality-based classification collection treatment principle is adopted overall, and the gradient reuse of electroplating wastewater is determined according to the requirements of the quality of reused water required by different working sections, so that the investment of fresh water is reduced as much as possible, the use cost of the fresh water is reduced, UF and RO systems (ultrafiltration and reverse osmosis systems) at the front end of each strand of wastewater treatment in the process flow can preferentially treat and reuse the production wastewater with lower concentration to a pre-production treatment section, the investment scale of subsequent processes is reduced, through the arrangement of an MVR evaporation system and an RO system in a sixth wastewater treatment system, the removal of water salt and heavy component pollutants and the removal of most light component organic matters in each strand after pretreatment can be realized, the effluent can be reused to a production rear-end process, the supplement frequency of the fresh water is reduced, the recycling of the electroplating wastewater is realized, and the zero discharge of the wastewater is realized.
In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a zero-discharge treatment system for electroplating wastewater;
FIG. 2 is a schematic view of a partial configuration of a first wastewater treatment subsystem;
FIG. 3 is a schematic view of a partial configuration of a second wastewater treatment subsystem;
FIG. 4 is a schematic view of a partial structure of a third waste water treatment subsystem;
FIG. 5 is a schematic view of a partial structure of a fourth wastewater treatment subsystem;
FIG. 6 is a schematic view of a partial structure of a fifth wastewater treatment subsystem;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In a preferred embodiment of the present invention, a zero discharge treatment system for electroplating wastewater comprises:
the first wastewater treatment subsystem is used for treating the oily wastewater, removing oil components in the oily wastewater and producing pretreated effluent;
the second wastewater treatment subsystem is used for treating the chromium-containing wastewater to remove chromium elements in the chromium-containing wastewater and produce pretreated effluent;
the third waste water treatment subsystem is used for treating chemical nickel wastewater, nickel-containing wastewater and zinc-nickel-containing wastewater to produce pretreated effluent;
the fourth wastewater treatment subsystem is used for treating mixed drainage wastewater, cyanide-containing wastewater and initial rainwater to produce pretreated effluent;
the fifth wastewater treatment subsystem is used for treating nitrogen-containing wastewater, zinc-containing wastewater and comprehensive wastewater to produce pretreated effluent;
the sixth wastewater treatment system is respectively connected with the water outlets of the first wastewater treatment subsystem, the second wastewater treatment subsystem, the third wastewater treatment subsystem, the fourth wastewater treatment subsystem and the fifth wastewater treatment subsystem, and is used for carrying out advanced treatment on pretreated effluent, and delivering treated fresh water to an advanced reclaimed water recycling system for recycling;
the sixth wastewater treatment system comprises a regulating reservoir, an MVR evaporation system and an RO system which are connected in sequence, wherein the regulating reservoir is used for adding a pH regulating agent to regulate pretreated effluent water in the regulating reservoir to be neutral or weakly alkaline, the pretreated effluent water enters the MVR evaporation system after being regulated by the regulating reservoir, evaporated heavy metal-containing waste salt is separated out for independent treatment, condensate liquid is filtered by the RO membrane system to intercept most light component organic matters in the water, concentrated water containing the light component organic matters flows back to the regulating reservoir, and fresh water is input into the deep reclaimed water recycling system;
in the above embodiment, the first wastewater treatment subsystem includes an oily wastewater collection tank, a demulsification-flotation integrated device, a flotation effluent collection tank, UF and RO systems, an oily wastewater flocculation-precipitation integrated device, an oily sludge concentration tank and an oily sludge plate-and-frame filter press, which are connected in sequence, and the UF and RO systems are connected with the front-end reclaimed water recycling system through a water outlet pipeline.
In the above embodiment, the second wastewater treatment subsystem includes a chromium-containing wastewater collection tank, an UF and RO system, a high-concentration chromium-containing wastewater collection tank, a reduction flocculation precipitation integrated device, a chromium-containing sludge concentration tank and a chromium-containing sludge plate-and-frame filter press, which are connected in sequence, and the UF and RO system is connected with the front-end reclaimed water reuse system through a water outlet pipeline.
In the above embodiment, the third waste water treatment subsystem includes an oxidation and decomplexation system, a nickel-containing and chemical nickel-containing wastewater collection tank, an UF and RO system, a high-concentration nickel-containing wastewater collection tank, a flocculation and precipitation integrated device, a nickel-containing sludge concentration tank and a nickel-containing sludge plate-and-frame filter press, which are connected in sequence, and the UF and RO system is connected with the front-end reclaimed water reuse system through a water outlet pipeline.
In the above embodiment, the fourth wastewater treatment subsystem includes an initial rainwater, a cyanide-containing wastewater and mixed wastewater collection tank, an UF and RO system, a primary oxidation treatment system, a secondary oxidation treatment system, a primary flocculation sedimentation tank, a secondary flocculation sedimentation tank, an iron, zinc, aluminum, nickel-containing sludge concentration tank and an iron, zinc, aluminum, nickel-containing sludge plate-and-frame filter press connected in sequence, the UF and RO system is connected with the front-end reclaimed water reuse system through a water outlet pipeline, and the output of the iron, zinc, aluminum, nickel-containing sludge plate-and-frame filter press pretreats the effluent.
In the above embodiment, the fifth wastewater treatment subsystem includes a comprehensive wastewater collection tank, a UF and RO system, a centrifugal electrolysis cyclone device, a primary flocculation and sedimentation tank, a secondary flocculation and sedimentation tank, a comprehensive sludge concentration tank, and a comprehensive sludge plate-and-frame filter press, which are connected in sequence, and the UF and RO system is connected to the front-end reclaimed water reuse system through a water outlet pipeline.
A zero-discharge treatment method of electroplating wastewater is applied to the zero-discharge treatment system of electroplating wastewater, and comprises the following steps:
after the oily wastewater is collected by an oily wastewater collecting tank, lifting the oily wastewater to an emulsion breaking and air floating integrated device, adding a demulsifier to dehydrate oil droplets, reducing free water molecules in the emulsion, and destroying a hydration layer of the oil droplets in the emulsion to convert the emulsified oil into dispersed oil; PAM and PAC are added to adsorb oil, so that the aim of removing oil is fulfilled. Air flotation effluent and pure water concentrated water in a plant area are mixed and then enter a UF and RO system, produced water of the UF and RO system enters a front-end reclaimed water recycling system, the concentrated water enters an oily wastewater flocculation and precipitation integrated device, liquid caustic soda and a flocculating agent are added for flocculation and precipitation to remove suspended matters in the wastewater, ammonia nitrogen in sodium hypochlorite oxidation water is added to be converted into nitrogen, and a clear solution after flocculation and precipitation is removed to a salt water collecting tank. The generated sludge enters an oil-containing sludge concentration tank and an oil-containing sludge plate-and-frame filter press for further dehydration and then is subjected to centralized treatment.
In the embodiment, low-concentration chromium-containing wastewater is collected by a chromium-containing wastewater collection tank, then the low-concentration chromium-containing wastewater is lifted to a UF and RO system, produced water enters a front-end reclaimed water recycling system, concentrated water and high-concentration chromium-containing wastewater enter a reduction flocculation and precipitation integrated device, the wastewater firstly enters a reduction tank, sulfuric acid is sequentially added into a reaction tank because chromium in the wastewater mainly exists as hexavalent chromium, the sulfuric acid is controlled by a pH controller to be added, the pH value is adjusted to an appropriate value, a reducing agent sodium sulfite is added into the wastewater, the hexavalent chromium contained in the wastewater is reduced to trivalent chromium with low toxicity, then sodium hydroxide is added into the wastewater to adjust the wastewater to be alkaline, PAC, PAM and a heavy metal catching agent are added to carry out flocculation reaction to generate chromium precipitates, the purpose of separating chromium elements from the wastewater is achieved through precipitation, meanwhile, ammonia nitrogen in sodium hypochlorite oxidation water is added to pretreat the ammonia nitrogen, the treated wastewater is discharged to an adjusting tank, and the generated sludge enters a chromium-containing sludge concentration tank and a plate-and frame sludge filter press for further dehydration and centralized treatment.
In the above embodiment, after the chemical nickel wastewater is collected by the oxidation complex breaking system, the nickel-containing complex is oxidized and broken by sodium hypochlorite in the oxidation complex breaking system, then the chemical nickel wastewater treated by the oxidation complex breaking system, the low-concentration nickel-containing wastewater and the zinc-nickel-containing wastewater enter the UF and RO systems together, the water produced by the UF and RO systems enters the front-end reclaimed water recycling system, the concentrated water and the high-concentration nickel-containing wastewater enter the flocculation and precipitation integrated device together, and the liquid caustic soda is added into the coagulation and precipitation device to adjust the pH value, and then the coagulant and the heavy metal ion trapping agent are added to remove nickel in the wastewater. The treated wastewater is discharged to a regulating tank, and the generated sludge enters a nickel-containing sludge concentration tank and a nickel-containing sludge plate-and-frame filter press for further dehydration and then is subjected to centralized treatment.
In the embodiment, the cyanide-containing wastewater, the mixed drainage wastewater and the initial rainwater are respectively pretreated aiming at characteristic pollutants before cyanide breaking according to the water quality condition;
wherein the mixed wastewater has high content of petroleum substances and is easy to block a membrane system, and the demulsification and oil removal by arranging demulsification and air floatation integrated equipment is considered at first; mixing the demulsified waste water with cyanide-containing waste water and initial rainwater, and pumping the mixture into a UF and RO membrane system for membrane concentration; the produced water after passing through the membrane system enters a front-end reclaimed water recycling system, and concentrated water enters a two-stage oxidation cyanogen breaking system;
the method comprises the steps of enabling cyanide-containing wastewater to enter a first-stage pH adjusting tank, adding alkali to adjust the pH value to 10-11, then overflowing the cyanide-containing wastewater to enter a first-stage oxidation tank, adding an oxidant under the condition of stirring to perform first-stage oxidation reaction, enabling the wastewater to overflow to enter a second-stage pH adjusting tank after first-stage oxidation, adding acid to adjust the pH value to 8-8.5, then overflowing the cyanide-containing wastewater to enter a second-stage oxidation tank, adding the oxidant under the condition of stirring to perform second-stage oxidation reaction, finally overflowing the cyanide-containing wastewater to enter a drainage tank, breaking the cyanide, then entering a second-stage flocculation precipitation tank, adjusting the pH value to add a flocculating agent and a heavy metal catching agent respectively to perform flocculation reaction, adding liquid alkali to the first-stage flocculation precipitation to control the pH value to be less than or equal to 8 to precipitate zinc and aluminum in the wastewater, and precipitating nickel in the second-stage flocculation precipitation wastewater.
Heavy metal pollutant silver is also contained in the mixed drainage sewage, and the mixed drainage sewage is precipitated in two-stage flocculation precipitation treatment because the concentration of the silver is too low and the mixed drainage sewage does not have a recovery condition. And discharging the treated wastewater to a regulating tank. The generated sludge enters an iron, zinc, aluminum and nickel-containing sludge concentration tank and an iron, zinc, aluminum and nickel-containing sludge plate-and-frame filter press for further dehydration and then is disposed outside;
in the above embodiment, the nitrogen-containing wastewater, the zinc-containing wastewater and the comprehensive wastewater are collected and mixed by the comprehensive wastewater collection tank, and then enter the UF and RO systems together, the produced water enters the front-end reclaimed water recycling system, and the concentrated water enters the centrifugal electrolysis cyclone device for treatment and recovery of copper in the wastewater. And (2) performing two-stage flocculation precipitation after copper removal, adding liquid alkali to the first-stage flocculation precipitation to control the pH to be less than or equal to 8, adding PAC, PAM and heavy metal ion trapping agents to precipitate zinc and aluminum in the wastewater, adding liquid alkali to the second-stage flocculation precipitation to control the pH to be less than or equal to 10, adding PAM and heavy metal ion trapping agents to precipitate nickel in the wastewater, discharging the treated wastewater to an adjusting tank, and performing concentrated treatment after the generated sludge enters a comprehensive sludge concentration tank and a comprehensive sludge plate-and-frame filter press for further dehydration.
In the practical implementation process, the centralized treatment mode is to classify the mud blocks obtained by filter pressing, and then transport the mud blocks to a recycling plant for reprocessing or recycling according to the practical classification.
The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A zero discharge treatment system for electroplating wastewater is characterized by comprising:
the first wastewater treatment subsystem is used for treating the oily wastewater, removing oil components in the oily wastewater and producing pretreated effluent;
the second wastewater treatment subsystem is used for treating the chromium-containing wastewater to remove chromium elements in the chromium-containing wastewater and produce pretreated effluent;
the third waste water treatment subsystem is used for treating chemical nickel wastewater, nickel-containing wastewater and zinc-nickel-containing wastewater to produce pretreated effluent;
the fourth wastewater treatment subsystem is used for treating mixed drainage wastewater, cyanide-containing wastewater and initial rainwater to produce pretreated effluent;
the fifth wastewater treatment subsystem is used for treating nitrogen-containing wastewater, zinc-containing wastewater and comprehensive wastewater to produce pretreated effluent;
the sixth wastewater treatment system is respectively connected with the water outlets of the first wastewater treatment subsystem, the second wastewater treatment subsystem, the third wastewater treatment subsystem, the fourth wastewater treatment subsystem and the fifth wastewater treatment subsystem, and is used for carrying out advanced treatment on the pretreated outlet water, and the treated fresh water is conveyed to the advanced reclaimed water reuse system for recycling;
the sixth wastewater treatment system comprises a regulating reservoir, an MVR evaporation system and an RO system which are sequentially connected, wherein the regulating reservoir is used for adding a pH regulating agent to regulate pretreated effluent water in the regulating reservoir to be neutral or weakly alkaline, the pretreated effluent water enters the MVR evaporation system after being regulated by the regulating reservoir, evaporated heavy metal-containing waste salt is separated out for independent treatment, condensate liquid is filtered by the RO membrane system to intercept most light component organic matters in the water, concentrated water containing the light component organic matters flows back to the regulating reservoir, and fresh water is input into the deep reclaimed water recycling system.
2. The electroplating wastewater zero-emission treatment system as claimed in claim 1, wherein the first wastewater treatment subsystem comprises an oily wastewater collection tank, a demulsification and air flotation integrated device, an air flotation effluent collection tank, an UF and RO system, an oily wastewater flocculation and precipitation integrated device, an oily sludge concentration tank and an oily sludge plate-and-frame filter press which are connected in sequence, and the UF and RO system is connected with the front-end reclaimed water recycling system through a water outlet pipeline.
3. The electroplating wastewater zero-emission treatment system as claimed in claim 1, wherein the second wastewater treatment subsystem comprises a chromium-containing wastewater collection tank, a UF and RO system, a high-concentration chromium-containing wastewater collection tank, a reduction flocculation precipitation integrated device, a chromium-containing sludge concentration tank and a chromium-containing sludge plate-and-frame filter press, and the UF and RO system is connected with the front-end reclaimed water recycling system through a water outlet pipeline.
4. The electroplating wastewater zero-emission treatment system as claimed in claim 1, wherein the third wastewater treatment subsystem comprises an oxidation and decomplexation system, a nickel-containing and chemical-nickel-containing wastewater collection tank, a UF and RO system, a high-concentration nickel-containing wastewater collection tank, a flocculation and precipitation integrated device, a nickel-containing sludge concentration tank and a nickel-containing sludge plate-and-frame filter press, and the UF and RO system is connected with the front-end reclaimed water reuse system through a water outlet pipeline.
5. The electroplating wastewater zero-discharge treatment system as claimed in claim 1, wherein the fourth wastewater treatment subsystem comprises an initial rainwater, cyanide-containing wastewater and mixed wastewater collection tank, a UF and RO system, a primary oxidation treatment system, a secondary oxidation treatment system, a primary flocculation sedimentation tank, a secondary flocculation sedimentation tank, a sludge concentration tank containing iron, zinc, aluminum and nickel, and a sludge plate-and-frame filter press containing iron, zinc, aluminum and nickel, the UF and RO system is connected with the front-end reclaimed water reuse system through an outlet pipe, and the output of the sludge plate-and-frame filter press containing iron, zinc, aluminum and nickel is used for pretreating outlet water.
6. The electroplating wastewater zero-discharge treatment system as claimed in claim 1, wherein the fifth wastewater treatment subsystem comprises a comprehensive wastewater collection tank, a UF and RO system, a centrifugal electrolysis cyclone device, a primary flocculation sedimentation tank, a secondary flocculation sedimentation tank, a comprehensive sludge concentration tank and a comprehensive sludge plate-and-frame filter press, and the UF and RO system is connected with the front-end reclaimed water recycling system through a water outlet pipeline.
7. A zero discharge treatment method of electroplating wastewater, which is applied to the zero discharge treatment system of electroplating wastewater of any one of claims 1 to 6, and is characterized by comprising the following steps:
after the oily wastewater is collected, lifting the oily wastewater to demulsification and air flotation integrated equipment, adding a demulsifier to dehydrate oil droplets, reducing free water molecules in emulsion, and damaging a hydration layer of the oil droplets in the emulsion to convert emulsified oil into dispersed oil; adding PAM and PAC to adsorb oils to obtain air-floated effluent, mixing the air-floated effluent with pure water concentrated water in a plant area, then feeding the air-floated effluent into an UF and RO system, feeding the produced water of the UF and RO system into a front-end reclaimed water recycling system, feeding the concentrated water into an oily wastewater flocculation and precipitation integrated device, adding liquid caustic soda and a flocculating agent to perform flocculation and precipitation to remove suspended matters in wastewater, simultaneously adding sodium hypochlorite to oxidize water to convert into ammonia nitrogen, removing a salt water collecting pool from clear liquid after flocculation and precipitation, feeding the generated sludge into an oily sludge concentration tank and an oily sludge plate-and-frame filter press to perform near-step dehydration, and then performing centralized treatment.
8. The zero discharge treatment method of electroplating wastewater according to claim 6, further comprising: collecting low-concentration chromium-containing wastewater through a chromium-containing wastewater collecting tank, lifting the low-concentration chromium-containing wastewater to a UF and RO system, enabling produced water to enter a front-end reclaimed water recycling system, enabling concentrated water and the high-concentration chromium-containing wastewater to enter reduction flocculation precipitation integrated equipment, enabling the wastewater to enter a reduction tank, sequentially adding sulfuric acid into a reaction tank because chromium in the wastewater mainly exists as hexavalent chromium, controlling the addition of the sulfuric acid through a pH controller, adjusting the pH value to an appropriate value, adding sodium sulfite as a reducing agent, reducing the hexavalent chromium contained in the wastewater into low-toxicity trivalent chromium, adding sodium hydroxide to adjust the wastewater to be alkaline, adding PAC, PAM and a heavy metal catching agent to perform flocculation reaction to generate chromium precipitates, further separating chromium elements from the wastewater through precipitation, simultaneously adding ammonia nitrogen in sodium hypochlorite oxidation water to perform pretreatment on ammonia nitrogen, discharging the treated wastewater to an adjusting tank, enabling the generated sludge to enter a chromium-containing sludge concentrating tank and a chromium-containing sludge plate-and frame filter press for further dehydration and then performing centralized treatment.
9. The zero-discharge treatment method of electroplating wastewater according to claim 8, further comprising: after chemical nickel wastewater is collected through an oxidation complex breaking system, after a nickel complex is removed through sodium hypochlorite oxidation in the oxidation complex breaking system, then the chemical nickel wastewater treated by the oxidation complex breaking system, low-concentration nickel-containing wastewater and zinc-containing nickel wastewater enter an UF and RO system together, water produced by the UF and RO system enters a front-end reclaimed water recycling system, concentrated water and high-concentration nickel-containing wastewater enter a flocculation and precipitation integrated device together, a coagulant is added into a coagulation and precipitation device to adjust the pH value, and then a heavy metal ion trapping agent is added to remove nickel in the wastewater, the treated wastewater is discharged into a regulating tank, and the produced sludge enters a nickel-containing sludge concentration tank and a nickel-containing sludge plate-and-frame filter press to be subjected to concentration treatment after near-step dehydration.
10. The zero discharge treatment method for electroplating wastewater according to claim 9, further comprising: collecting cyanide-containing wastewater, mixed drainage wastewater and initial rainwater, and then respectively pretreating characteristic pollutants before cyanide breaking according to water quality conditions;
the method comprises the following steps of (1) performing emulsion breaking and oil removing by using emulsion breaking and air flotation integrated equipment, wherein petroleum contained in mixed wastewater is high and easily blocks a membrane system; mixing the demulsified waste water with cyanide-containing waste water and initial rainwater, and pumping the mixture into a UF and RO membrane system for membrane concentration; the produced water after passing through the membrane system enters a front-end reclaimed water recycling system, and concentrated water enters a two-stage oxidation cyanogen breaking system;
the method comprises the following steps of enabling cyanide-containing wastewater to enter a primary pH adjusting tank, adding alkali to adjust the pH value to 10-11, then overflowing into a primary oxidation tank, adding an oxidant under the stirring condition, carrying out primary oxidation reaction, enabling the wastewater to overflow into a secondary pH adjusting tank after primary oxidation, adding acid to adjust the pH value to 8-8.5, then overflowing into a secondary oxidation tank, adding the oxidant under the stirring condition, carrying out secondary oxidation reaction, finally overflowing into a drainage tank, breaking cyanogen, entering a two-stage flocculation precipitation tank, adjusting the pH value respectively, adding a flocculating agent and a heavy metal catching agent to carry out flocculation reaction, adding liquid alkali to the primary flocculation precipitation to control the pH value to be less than or equal to 8, precipitating zinc and aluminum in the wastewater, and carrying out secondary flocculation precipitation on nickel in the wastewater;
the method comprises the steps that the comprehensive wastewater collection pool is used for collecting and mixing nitrogen-containing wastewater, zinc-containing wastewater and comprehensive wastewater, the nitrogen-containing wastewater, the zinc-containing wastewater and the comprehensive wastewater enter the UF and RO systems together, produced water enters the front-end reclaimed water recycling system, and concentrated water enters the centrifugal electrolysis cyclone device for treatment and copper recovery in the wastewater;
removing copper, and then carrying out two-stage flocculation precipitation, wherein the pH of the first-stage flocculation precipitation is controlled to be less than or equal to 8 by adding liquid alkali, and the zinc and the aluminum in the wastewater are precipitated by adding PAC, PAM and heavy metal ion trapping agent, and the pH of the second-stage flocculation precipitation is controlled to be less than or equal to 10 by adding PAM and the nickel in the wastewater are precipitated by adding PAM and heavy metal ion trapping agent;
and discharging the treated wastewater to a regulating tank, and allowing the generated sludge to enter a comprehensive sludge concentration tank and a comprehensive sludge plate-and-frame filter press for further dehydration and then performing centralized treatment.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105776705A (en) * | 2016-04-12 | 2016-07-20 | 衢州华友钴新材料有限公司 | Comprehensive resourceful treatment method for cobalt-nickel smelting wastewater |
| CN107840509A (en) * | 2017-09-26 | 2018-03-27 | 上海晶宇环境工程股份有限公司 | Electroplating waste processing process and its special purpose device |
| CN207361981U (en) * | 2017-09-26 | 2018-05-15 | 上海晶宇环境工程股份有限公司 | The special purpose device of electroplating waste processing process |
| CN211847559U (en) * | 2019-12-21 | 2020-11-03 | 北京北方节能环保有限公司 | Electroplating cleaning wastewater zero release processing system |
| CN111960607A (en) * | 2020-07-03 | 2020-11-20 | 浙江清诚环境科技有限公司 | Treatment process of electroplating wastewater |
-
2022
- 2022-06-23 CN CN202210719494.3A patent/CN115340236A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105776705A (en) * | 2016-04-12 | 2016-07-20 | 衢州华友钴新材料有限公司 | Comprehensive resourceful treatment method for cobalt-nickel smelting wastewater |
| CN107840509A (en) * | 2017-09-26 | 2018-03-27 | 上海晶宇环境工程股份有限公司 | Electroplating waste processing process and its special purpose device |
| CN207361981U (en) * | 2017-09-26 | 2018-05-15 | 上海晶宇环境工程股份有限公司 | The special purpose device of electroplating waste processing process |
| CN211847559U (en) * | 2019-12-21 | 2020-11-03 | 北京北方节能环保有限公司 | Electroplating cleaning wastewater zero release processing system |
| CN111960607A (en) * | 2020-07-03 | 2020-11-20 | 浙江清诚环境科技有限公司 | Treatment process of electroplating wastewater |
Non-Patent Citations (1)
| Title |
|---|
| 毛应淮等: "《重点行业清洁生产工作指南》", 北京：中央广播电视大学出版社, pages: 430 - 431 * |
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