CN106495403A - A kind of zero-emission treatment method for electroplating wastewater - Google Patents

A kind of zero-emission treatment method for electroplating wastewater Download PDF

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Publication number
CN106495403A
CN106495403A CN201611057007.2A CN201611057007A CN106495403A CN 106495403 A CN106495403 A CN 106495403A CN 201611057007 A CN201611057007 A CN 201611057007A CN 106495403 A CN106495403 A CN 106495403A
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waste water
pond
wastewater
comprehensive
level
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陈志才
杨柽瀚
杨伟杰
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Huizhou Jinmao Source Environmental Protection Technology Co Ltd
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Huizhou Jinmao Source Environmental Protection Technology Co Ltd
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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
    • 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
    • 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
    • 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
    • C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • 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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/101—Sulfur compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/12—Halogens or halogen-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C02F2101/18—Cyanides
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C02F2101/22—Chromium or chromium compounds, e.g. chromates
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/14—NH3-N
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/16—Total nitrogen (tkN-N)
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    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/18—PO4-P
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • 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
    • C02F3/02—Aerobic processes
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    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/06—Aerobic processes using submerged filters
    • 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
    • C02F3/28—Anaerobic digestion processes
    • 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

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention discloses a kind of zero-emission treatment method for electroplating wastewater, this electroplating wastewater zero processing system and method can carry out effectively integrated treatment to acid waste water, pre-treatment waste water, cyanide wastewater, chromate waste water, nickel-containing waste water and ground waste water, the COD (COD) in waste water can be significantly reduced, the TAN and total phosphorus content of waste water is effectively removes；More importantly, waste water quality after treatment has reached the requirement of reuse, after wastewater treatment, the 80% of total amount can be back to use electroplating assembly line use, save the loss of water resource, the discharge of Wastewater Pollutant is prevented, has improved waste water treatment efficiency and economic results in society, realize clean manufacturing, energy-saving and emission-reduction, reduce the pollution to environment.

Description

A kind of zero-emission treatment method for electroplating wastewater
Technical field
The present invention relates to electroplating waste water treatment technology field, more particularly to a kind of zero-emission treatment method for electroplating wastewater.
Background technology
Plating is metal and nonmetallic surface to be decorated, protected and obtained some new property using the method for electrochemistry A kind of technical process of matter, is the quality for ensureing electroplated product, makes the coat of metal that there is the good appearance and base of flat smooth Body strong bonded, it is necessary to before plating dirt (oil, the rust, oxide skin etc.) thoroughly cleaning on plating piece surface totally, and after plating The attachment liquid on plating piece surface is cleaned up.Therefore, substantial amounts of waste water is necessarily discharged in general plating production process.Electroplating wastewater Water quality, the water yield relevant with the factor such as the process conditions of plating production, produce load, operation management and water use model.Plating is useless The water quality of water is complicated, and composition is wayward, heavy metal ion and the cyanide such as the chromium that wherein contains, copper, nickel, zinc, gold, silver, cadmium Larger etc. toxicity, some belong to carcinogenic, teratogenesis, mutagenic extremely toxic substance, very harmful to the mankind.
In recent years, with people's increasingly improving that environment quality of life is required and country's dynamics that environmental protection is paid attention to not Disconnected reinforcement, the process and discharge to electroplating wastewater are increasingly strict, and waste water reclamation requires also to gradually step up, and environmental protection becomes plating and looks forward to The primary premise of industry survival and development, country are also expressed useless to plating by putting into effect a series of policies and measures and management method The resolution of water process.
At present, traditional electroplating wastewater processing mode is：First plus alkali adjust pH, formed heavy metal hydroxide granule, so After add the flocculant such as aluminium polychlorid, ferric chloride, then add the flocculation aids such as polyacrylamide so as to form big vanadium flower, Mud-water separation is carried out in sedimentation tank.Sometimes sedimentation tank water outlet heavy metal still can not be up to standard, adds sodium sulfide etc. in water outlet again Reagent, then carries out membrane filtration again.Traditional process operations simply, to operator are required than relatively low, in water outlet weight Tenor can reach 2 standard of GB21900-2008 tables substantially.But this processing disadvantages are also obvious, floor space is big, Added amount of chemical is big, sludge yield is high, processing cost is high.Especially, the treatment effect of traditional handicraft is unstable, easily produces ripple Dynamic, there is often situation not up to standard.Current process is concerned only with the discharge of heavy metal, to dirts such as Organic substance, ammonia nitrogen, total phosphorus The removal concern of dye thing is less, and traditional handling process still can not be carried out effectively to these pollutant to the complicated waste water of water quality Process；And, refer to for the reuse of waste water is also rare in the processing method of the electroplating wastewater of prior art.
Content of the invention
The purpose of the present invention is to overcome weak point of the prior art, there is provided a kind of efficient electroplating wastewater zero Processing system and method, this method of wastewater treatment can to acid waste water, pre-treatment waste water, cyanide wastewater and chromate waste water, Nickel-containing waste water, ground waste water carry out effectively integrated treatment, at the same can also to process after waste water recycle, save Use water cost in electroplating process.
The purpose of the present invention is achieved through the following technical solutions：
A kind of zero-emission treatment method for electroplating wastewater, comprises the following steps：
S1, categorised collection acid waste water, pre-treatment waste water, cyanide wastewater and chromate waste water, nickel-containing waste water, ground waste water；
S2, described acid waste water and pre-treatment waste water are entered comprehensive wastewater processing pond after pipe network collection；
Described cyanide wastewater is passed sequentially through one-level broken cyanide pond and two grades of broken cyanide ponds is carried out after two-stage broken cyanide process, institute The post processing cyanide wastewater for obtaining enters the comprehensive wastewater processing pond；
Described chromate waste water is passed sequentially through waste liqouor reduction treatment pond, waste liqouor flocculation treatment pond and waste liqouor precipitation Processing pond, after solid-liquid separation, the post processing chromate waste water on gained upper strata enters the comprehensive wastewater processing pond；
Described ground waste water is passed sequentially through broken cyanide pond and the comprehensive wastewater entered after broken chromium pond is processed to be processed Pond；
S3, the comprehensive wastewater in the comprehensive wastewater processing pond is entered comprehensive materialization reaction member, to comprehensive wastewater in Heavy metal ion be removed, obtain the reacted comprehensive wastewater of comprehensive materialization after solid-liquid separation；
S4, by reacted for the comprehensive materialization of S3 gained comprehensive wastewater after one-level sand filters, enter biochemical anti- Unit is answered, and the removal for ammonia nitrogen, total nitrogen, total phosphorus, COD being carried out to the reacted comprehensive wastewater of comprehensive materialization, after obtaining biochemical reaction Comprehensive wastewater；
S5, by the comprehensive wastewater after the biochemical reaction of S4 gained after two grades of sand filters, enter softening resin container Carry out except Calcium treatment, entering ultra filtration unit afterwards carries out macromolecular particle filtration treatment, enters reverse osmosis units afterwards and is taken off Salt treatment, reverse osmosis produced water enter the full exchange resin tower of one-level and carry out primary adsorption, and reverse osmosis concentrated water enters dish tubular membrane Processing unit carries out high power concentration, and dish tubular membrane processing unit produces water two grades of full exchange resin towers of entrance and carries out two grades Absorption, dish tubular membrane processing unit concentrated water enter evaporation and concentration unit and carry out being evaporated crystallization, are evaporated crystallization post processing and complete；
PH initial adjustments pond that the comprehensive materialization reaction member includes being sequentially connected by pipeline, micro cell, Aeration tank, anti- Ying Chi, flocculation basin and sedimentation tank；
The biochemical reaction unit includes that the pH being sequentially connected by pipeline adjusts back pond, hydrolysis acidification pool, anoxic pond, aerobic Pond, biochemical sedimentation basin and circulating biological aerated filter；
The water inlet end of the full exchange resin tower of the one-level also includes processing described nickel-containing waste water, described Nickel-bearing Waste Water enters the full amberlite of the one-level after nickel recovery flocculation basin, nickel recovery sedimentation tank, nickel recovery filtering ponds are passed sequentially through Fat tower is processed；
Wherein in some embodiments, the technological parameter in the one-level broken cyanide pond in step S2 is：Cyanate:Oxidant =1:3～4；The technological parameter in two grades of broken cyanide ponds is：Cyanate:Oxidant=1:4.
Wherein in some embodiments, the technological parameter of the ultra filtration unit in step S5 is：The operation side of ultrafilter membrane Formula is external-compression type, and the pore diameter range of ultrafilter membrane is 0.01～0.1 μm.
Wherein in some embodiments, the water purification produced during the primary adsorption and secondary absorption described in step S5 leads to Piping leads to reuse pool.
Wherein in some embodiments, the full exchange resin tower of one-level described in step S5 includes one-level cationic resin Tower and one-level resin anion (R.A.) tower.
Wherein in some embodiments, described in step S5, two grades of full exchange resin towers include two grades of cationic resin Tower and two grades of resin anion (R.A.) towers.
Further, the one-level cationic resin tower and two grades of cationic resin towers are to Cu2+And Ni2+It is removed, institute One-level resin anion (R.A.) tower and two grades of resin anion (R.A.) towers are stated to Cl-、SO4 2-、(CrO4)2-It is removed.
Based on above-mentioned technical scheme, the technique effect that the present invention has is as follows：
Electroplating wastewater zero processing system and method that the present invention is provided, combine on reference to Conventional processing methods actual Autonomous innovation, significantly reduces the COD (COD) in waste water, effectively removes the TAN and total phosphorus of waste water Amount.
Importantly, waste water quality after treatment has reached the requirement of reuse, the 80% of total amount after wastewater treatment Electroplating assembly line use can be back to use, the loss of water resource is saved, have prevented the discharge of Wastewater Pollutant, be improved at waste water Reason efficiency and economic results in society, realize that clean manufacturing, energy-saving and emission-reduction reduce the pollution to environment.
Description of the drawings
Module maps of the Fig. 1 for the electroplating wastewater zero processing system 1000 of one embodiment of the invention.
Specific embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing Give the better embodiment of the present invention.But, the present invention can be realized in many different forms, however it is not limited to herein Described embodiment.On the contrary, the purpose for providing these embodiments is to make to understand more the disclosure Plus it is thorough comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can directly on another element Or can also there is element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to To another element or may be simultaneously present centering elements.Term as used herein " vertical ", " level ", " left side ", For illustrative purposes only, it is unique embodiment to be not offered as " right side " and similar statement.
Unless otherwise defined, all of technology used herein and scientific terminology and the technical field for belonging to the present invention The implication that technical staff is generally understood that is identical.The term for being used in the description of the invention herein is intended merely to description tool The purpose of the embodiment of body, it is not intended that of the invention in limiting.Term as used herein " and/or " including one or more The arbitrary and all of combination of related Listed Items.
As shown in figure 1, the schematic diagram of the electroplating wastewater zero processing system 1000 for one embodiment of the invention, electroplates useless Water zero discharge processing system 1000, by the comprehensive wastewater processing pond 1100 being sequentially connected by pipeline, comprehensive materialization reaction member 1200th, one-level sand filter 1300,1400, two grades of sand filters 1500 of biochemical reaction unit, softening resin container 1600, ultra filtration unit 1700th, reverse osmosis units 1800, full ion-exchange unit, 2000 structure of dish tubular membrane processing unit 1900 and evaporation and concentration unit Into；
The one-level broken cyanide pond 1010 and two grades of broken cyanides being sequentially connected by pipeline is additionally provided with before comprehensive wastewater processing pond 1100 Pond 1011, the water side in two grades of broken cyanide ponds 1011 are connected with the water inlet end of comprehensive wastewater processing pond 1100 by pipeline；
It is additionally provided with the waste liqouor reduction treatment pond 1020, chromium being sequentially connected by pipeline to return before comprehensive wastewater processing pond 1100 Receive flocculation treatment pond 1021 and waste liqouor precipitation process pond 1022, the water side in waste liqouor precipitation process pond 1022 by pipeline with The water inlet end of comprehensive wastewater processing pond 1100 is connected；
The broken cyanide pond 1030 and broken chromium pond 1031 being sequentially connected by pipeline is additionally provided with before comprehensive wastewater processing pond 1100, is broken The water side in chromium pond 1031 is connected with the water inlet end of comprehensive wastewater processing pond 1100 by pipeline；
PH initial adjustments pond 1210, micro cell 1220 that comprehensive materialization reaction member 1200 includes being sequentially connected by pipeline, Aeration tank 1230, reaction tank 1240, flocculation basin 1250 and sedimentation tank 1260；
Biochemical reaction unit 1400 includes being adjusted back pond 1410, hydrolysis acidification pool 1420, being lacked by the pH that pipeline is sequentially connected Oxygen pond 1430, Aerobic Pond 1440, biochemical sedimentation basin 1450 and circulating biological aerated filter 1460；
Full ion-exchange unit includes the full exchange resin tower 1810 of one-level and two grades of full exchange resin towers 1910；
It is additionally provided with before the water inlet end of the full exchange resin tower 1810 of one-level and flocculation is reclaimed by the nickel that pipeline is sequentially connected Reclaim sedimentation tank 1041, nickel and reclaim filtering ponds 1042 in pond 1040, nickel.
The pore diameter range of the ultrafilter membrane of ultra filtration unit 1700 is 0.01～0.1 μm.
The structure of the ultrafilter membrane of ultra filtration unit 1700 is hollow fiber form.
The water end (W.E.) that produces of reverse osmosis units 1800 is connected with the water inlet end of the full exchange resin tower 1810 of one-level by pipeline Connect, the concentrated water end of reverse osmosis units 1800 is connected with the water inlet end of dish tubular membrane processing unit 1900 by pipeline.
Water inlet of the product water end (W.E.) of dish tubular membrane processing unit 1900 by pipeline and two grades of full exchange resin towers 1910 End is connected, and the concentrated water end of dish tubular membrane processing unit 1900 is connected with the water inlet end of evaporation and concentration unit 2000 by pipeline Connect.
The product water end (W.E.) of the full exchange resin tower 1810 of one-level and two grades of full exchange resin towers 1910 is respectively by pipe Road is connected with reuse pool 2100.
The full exchange resin tower 1810 of one-level includes one-level cationic resin tower and one-level resin anion (R.A.) tower.
Two grades of full exchange resin towers 1910 include two grades of cationic resin towers and two grades of resin anion (R.A.) towers.
The method that above-mentioned electroplating wastewater zero processing system processes electroplating wastewater, comprises the following steps：
S1, categorised collection acid waste water, pre-treatment waste water, cyanide wastewater and chromate waste water, nickel-containing waste water, ground waste water； Rinse water of the acid waste water essentially from production processes such as acid activation, acid pickling and rust removings；Pre-treatment waste water essentially from electrochemical deoiling, Cleaning waste water after electrolytic degreasing, major pollutants Organic substance；Cyanide wastewater is silver-colored, golden, copper process essentially from cyanide electroplating Rinse water, major pollutants are cyanide and all kinds of heavy metals, such as gold, silver, copper etc.；Chromate waste water is produced essentially from chromium plating Line, passivation, etc. operation rinse water, major pollutants are Cr VI, trivalent chromium etc.；Nickel-containing waste water is essentially from electronickelling, change The cleaning waste water after nickel plating is learned, based on acid nickel and phosphor contaminant, organic pollution is secondly for major pollutants；Ground waste water master Waste water to be cleaned from workshop, major pollutants there are the contaminant metal ions such as chromium, cyanogen, nickel, copper.
S2, described acid waste water and pre-treatment waste water are entered comprehensive wastewater processing pond 1100 after pipe network collection；
Described cyanide wastewater is passed sequentially through one-level broken cyanide pond 1010 and two grades of broken cyanide ponds 1011 carries out two-stage broken cyanide After process, the post processing cyanide wastewater of gained enters the comprehensive wastewater processing pond 1100；
Broken cyanide principle：
Cyanogen is oxidized to cyanate for incomplete oxidation by the first stage：
CN+ClO+H2O——CNCl+2H
CNCl+2OH——CNO+Cl+H2O
CN and ClO reactions firstly generate CNCl, then are hydrolyzed into CNO；Its response speed depends on pH value, temperature and effective chlorine Concentration, pH value are higher, and water temperature is higher, and effective chlorine density is more high, and the speed for hydrolyzing is faster, and the toxicity of CNO is only the thousand of CN toxicity / mono-；
Second stage is the complete oxidation stage, by further for cyanate oxidation Decomposition into carbon dioxide and nitrogen：Oxidant Dosage be：
First stage CN:Cl2=1:3～4
Second stage CN:Cl2=1:4
Two benches add up to CN:Cl2=1:7～8；
Described chromate waste water is passed sequentially through waste liqouor reduction treatment pond 1020, waste liqouor flocculation treatment pond 1021 and chromium Precipitation process pond 1022 is reclaimed, after solid-liquid separation, the post processing chromate waste water on gained upper strata enters the comprehensive wastewater processing pond 1100；
Described ground waste water is passed sequentially through broken cyanide pond 1030 and the synthesis is entered after broken chromium pond 1031 is processed Purification tank for liquid waste 1100；
S3, the comprehensive wastewater in comprehensive wastewater processing pond 1100 is entered comprehensive materialization reaction member 1200, comprehensive materialization Reaction member 1200 includes pH initial adjustments pond 1210, micro cell 1220, Aeration tank 1230, reaction tank 1240,1250 and of flocculation basin Sedimentation tank 1260, comprehensive wastewater pass sequentially through above-mentioned processing pond, by heavy metal ion and partial organic substances in comprehensive wastewater Matter is removed, and obtains the comprehensive wastewater after physical reaction after solid-liquid separation；
S4, by the comprehensive wastewater after the physical reaction of S3 gained after one-level sand filter 1300 is filtered, enter biochemical anti- Answer unit 1400, biochemical reaction unit include pH readjustments pond 1410, hydrolysis acidification pool 1420, anoxic pond 1430, Aerobic Pond 1440, Biochemical sedimentation basin 1450 and circulating biological aerated filter 1460, comprehensive wastewater pass sequentially through above-mentioned processing pond, comprehensive to physical reaction Closing waste water carries out the removal of ammonia nitrogen, total nitrogen, total phosphorus, COD, while further removing the organic substance in waste water, obtains biochemical anti- Comprehensive wastewater after answering；
S5, by the comprehensive wastewater after the biochemical reaction of S4 gained after two grades of sand filters 1500 are filtered, enter softening tree Fat tank 1600 is carried out except Calcium treatment, and entering ultra filtration unit 1700 afterwards carries out macromolecular particle filtration treatment, ultra filtration unit 1700 The pore diameter range of ultrafilter membrane be 0.01～0.1 μm, the material of ultrafilter membrane is Kynoar, and the structure of ultrafilter membrane is hollow fibre Dimension formula, the method for operation of ultrafilter membrane is external-compression type；Ultrafiltration be between 0.01～0.1 μm of removal polluter most efficient method it One, almost all of float can be not only removed using ultrafiltration, and can also remove partial organic substances, keep ultrafiltration to produce water and continue Stablize in SDI<3, it is ensured that the operation steady in a long-term of reverse osmosiss；Entering reverse osmosis units 1800 afterwards carries out desalting processing, reverse osmosis Producing thoroughly the full exchange resin tower 1810 of water entrance one-level carries out primary adsorption, and the full exchange resin tower 1810 of one-level includes one Level cationic resin tower and one-level resin anion (R.A.) tower, reverse osmosis concentrated water enters dish tubular membrane processing unit 1900, and to carry out high power dense Contracting is processed, and dish tubular membrane processing unit 1900 produces water and enters two grades of full exchange resin towers 1910 and carries out secondary absorption, two grades Full exchange resin tower 1910 includes two grades of cationic resin towers and two grades of resin anion (R.A.) towers, one-level cationic resin tower and Two grades of cationic resin towers are to Cu2+And Ni2+It is removed, the one-level resin anion (R.A.) tower and two grades of resin anion (R.A.) towers pair Cl-、SO4 2-、(CrO4)2-It is removed；The water inlet end of the full exchange resin tower 1810 of the one-level also includes processing described Nickel-containing waste water, described nickel-containing waste water are passing sequentially through nickel recovery flocculation basin 1040, nickel recovery sedimentation tank 1041, nickel recovery filtration Behind pond 1042, enter the full exchange resin tower 1810 of the one-level and processed；1900 concentrated water of dish tubular membrane processing unit is entered Entering evaporation and concentration unit 2000 carries out being evaporated crystallization, is evaporated crystallization post processing and completes.In the full exchange resin tower 1810 of one-level Primary adsorption process and two grades of full exchange resin towers 1910 in secondary absorption during produce water purification pass through pipeline Reuse pool 2100 is back to use, the water quality of recycle-water meets the use requirement of electroplating workshop production line, which saves water resource Loss, prevented the discharge of Wastewater Pollutant, reduced the pollution to environment.
Specifically, the dish tubular membrane processing unit 1900 include filtration membrane, flow guiding disc, center pull rod, high-pressure bottle, Flange, sealing member and connecting bolt.The operation principle of dish tubular membrane processing unit 1900：The logical filtration membrane of waste water and high-pressure bottle Gap reach film process unit bottom, then uniform cloth stream enters flow guiding disc, in water conservancy diversion panel surface with radar scanning mode stream Move, next group of flow guiding disc and filter membrane piece is entered from coin operated otch, in vortex shape flowing in whole film post, during product water passes through Heart bank of tubes membrane processing unit.
Through above-mentioned process step, now the most polluters in waste water are removed.
The above embodiment only expresses the several embodiments of the present invention, and its description is more concrete and detailed, but Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that the ordinary skill people for this area For member, without departing from the inventive concept of the premise, some deformations and improvement can also be made, these belong to the present invention's Protection domain.Therefore, the protection domain of patent of the present invention should be defined by claims.

Claims (7)

1. a kind of zero-emission treatment method for electroplating wastewater, it is characterised in that comprise the following steps：
S1, categorised collection acid waste water, pre-treatment waste water, cyanide wastewater and chromate waste water, nickel-containing waste water, ground waste water；
S2, described acid waste water and pre-treatment waste water are entered comprehensive wastewater processing pond after pipe network collection；
Described cyanide wastewater is passed sequentially through one-level broken cyanide pond and two grades of broken cyanide ponds is carried out after two-stage broken cyanide process, gained Post processing cyanide wastewater enters the comprehensive wastewater processing pond；
Described chromate waste water is passed sequentially through waste liqouor reduction treatment pond, waste liqouor flocculation treatment pond and waste liqouor precipitation process Pond, after solid-liquid separation, the post processing chromate waste water on gained upper strata enters the comprehensive wastewater processing pond；
Described ground waste water is passed sequentially through broken cyanide pond and the comprehensive wastewater processing pond is entered after broken chromium pond is processed；
S3, the comprehensive wastewater in the comprehensive wastewater processing pond is entered comprehensive materialization reaction member, to comprehensive wastewater in weight Metal ion is removed, and obtains the reacted comprehensive wastewater of comprehensive materialization after solid-liquid separation；
S4, by reacted for the comprehensive materialization of S3 gained comprehensive wastewater after one-level sand filters, enter biochemical reaction list Unit, the removal for carrying out ammonia nitrogen, total nitrogen, total phosphorus, COD to the reacted comprehensive wastewater of comprehensive materialization obtain comprehensive after biochemical reaction Close waste water；
S5, by the comprehensive wastewater after the biochemical reaction of S4 gained after two grades of sand filters, enter softening resin container carry out Calcium treatment is removed, entering ultra filtration unit afterwards carries out macromolecular particle filtration treatment, and entering reverse osmosis units afterwards is carried out at desalination Reason, reverse osmosis produced water enter the full exchange resin tower of one-level and carry out primary adsorption, and reverse osmosis concentrated water enters dish tubular type film process Unit carries out high power concentration, and dish tubular membrane processing unit produces water two grades of full exchange resin towers of entrance and carries out two grades of suctions Attached, dish tubular membrane processing unit concentrated water enters evaporation and concentration unit and carries out being evaporated crystallization, is evaporated crystallization post processing and completes；
PH initial adjustments pond that the comprehensive materialization reaction member includes being sequentially connected by pipeline, micro cell, Aeration tank, reaction Pond, flocculation basin and sedimentation tank；
The biochemical reaction unit include the pH being sequentially connected by pipeline adjust back pond, hydrolysis acidification pool, anoxic pond, Aerobic Pond, Biochemical sedimentation basin and circulating biological aerated filter；
The water inlet end of the full exchange resin tower of the one-level also includes processing described nickel-containing waste water, and described nickel-containing waste water exists After passing sequentially through nickel recovery flocculation basin, nickel recovery sedimentation tank, nickel recovery filtering ponds, the full exchange resin tower of the one-level is entered Processed.
2. a kind of zero-emission treatment method for electroplating wastewater according to claim 1, it is characterised in that described in step S2 The technological parameter in one-level broken cyanide pond is：Cyanate:Oxidant=1:3～4；The technological parameter in two grades of broken cyanide ponds is：Cyanic acid Salt:Oxidant=1:4.
3. a kind of zero-emission treatment method for electroplating wastewater according to claim 1, it is characterised in that described in step S5 The technological parameter of ultra filtration unit is：The method of operation of ultrafilter membrane is external-compression type, and the pore diameter range of ultrafilter membrane is 0.01～0.1 μm.
4. a kind of zero-emission treatment method for electroplating wastewater according to claim 1, it is characterised in that described in step S5 The water purification produced during primary adsorption and secondary absorption is back to use reuse pool by pipeline.
5. a kind of zero-emission treatment method for electroplating wastewater according to claim 1, it is characterised in that described in step S5 The full exchange resin tower of level includes one-level cationic resin tower and one-level resin anion (R.A.) tower.
6. a kind of zero-emission treatment method for electroplating wastewater according to claim 1, it is characterised in that two described in step S5 The full exchange resin tower of level includes two grades of cationic resin towers and two grades of resin anion (R.A.) towers.
7. a kind of zero-emission treatment method for electroplating wastewater according to claim 5～6, it is characterised in that the one-level sun Ion exchange resin tower and two grades of cationic resin towers are to Cu2+And Ni2+It is removed, the one-level resin anion (R.A.) tower and two grades of the moon Ion exchange resin tower is to Cl-、SO4 2-、(CrO4)2-It is removed.
CN201611057007.2A 2016-11-25 2016-11-25 A kind of zero-emission treatment method for electroplating wastewater Withdrawn CN106495403A (en)

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