CN110204136A - The method that electroplating waste water resource utilizes - Google Patents

The method that electroplating waste water resource utilizes Download PDF

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Publication number
CN110204136A
CN110204136A CN201910273855.4A CN201910273855A CN110204136A CN 110204136 A CN110204136 A CN 110204136A CN 201910273855 A CN201910273855 A CN 201910273855A CN 110204136 A CN110204136 A CN 110204136A
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Prior art keywords
waste water
electroplating
utilizes
saturation
damp
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CN201910273855.4A
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Chinese (zh)
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李英劼
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李英劼
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating
    • C02F1/04Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/10Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/283Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/20Heavy metals or heavy metal compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/16Nature 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
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/08Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/10Energy recovery

Abstract

The invention discloses a kind of methods that electroplating waste water resource utilizes, and have following processing steps in sequence: neutralization filtering, adsorption-desorption, UF membrane, evaporation and concentration and crystallization, recycling are damp and hot.Stop absorption in adsorption-desorption step after the COD of water in adsorption tanks reaches 100-150mg/l.The present invention solves heavy metal in electroplating wastewater pollution problem, recycles utility, realizes the resource utilization of waste water.

Description

The method that electroplating waste water resource utilizes
Technical field
The present invention relates to a kind of processing techniques of electroplating wastewater.
Background technique
The complicated component of electroplating wastewater, it is general containing acid, or also containing organics solvents such as cyanogen, it is another or containing chromium ion, nickel ion, The various heavies such as zinc ion, cadmium ion, harmfulness are very big.Such cost for wastewater treatment is high, and qualified discharge difficulty is big, becomes three One of big contaminated industry.The traditional processing method of electroplating wastewater has chemical method, bioanalysis, electrolysis method etc., most proximad film process Technique direction development, can recycle most of water.But the heavy metal pollution problem in the concentrating spent liquor after film process is not yet It is solved.
According to statistics, China's electroplating enterprise reaches 2 Wan Duojia, every year to the waste water of environmental emission up to as many as 400,000,000 tons, with ring It is more and more tighter to protect emission request, control dynamics is increasing, and many electroplating enterprises are shut down because discharging the reasons such as not up to standard.It is some Enterprise moves to under-developed area by developed regions because draining the reasons such as difficult up to standard and processing cost is high.But discharge of wastewater is not up to standard The problem of be not resolved still.This requires electroplating industry to seek a kind of new work for meeting country, local environmental protection policy requirement Skill, Lai Shixian electroplating wastewater recycle, and are treasured by the great materialization evil of heavy metallic salt this kind of potential hazard in waste water, The low pollution of realization electroplating industry, even no pollution.
A kind of high-effect ionic of the disclosure of the invention that number of patent application is 2012105218615 exchanges electroplating waste-water reutilizing processing System comprising comprehensive wastewater conditioning tank, quartz filter, bag filter, ultrafilter, ultrafiltration water producing tank, active carbon mistake Filter, the first fine filter, cation exchanger group, anion exchanger group, the second fine filter, reuse pool and constant pressure recycle-water Pump;Cation exchanger group exchanges regenerative system connection with a cation, and anion exchanger group and an anion exchange regenerate System connection.Invention tool treatment process is more, and processing equipment is at high cost.
A kind of electroplating waste water treatment equipment of disclosure of the invention that number of patent application is 2012101063418 includes: general plating is useless Wetting system is connect with oxidant electrolytic cell and alkali storage slot, its rear end sets alkali respectively equipped with the alkalization slot for collecting electroplating wastewater Change precipitation tank, to precipitate degradation heavy metal composition, after be transported in general electrolytic cell and carry out electrolysis absorption, then be transported to depth The absorption of electrolytic cell deep electrolytic, then successively it is transported to precipitation tank and lautertuns is precipitated and filtered, filtered water is sent to net Water reserve tank;Chromic acid electroplating wastewater equipment, if chromic acid electrolytic cell concentrates chromic acid electroplating wastewater, it is heavy to chromic acid precipitation tank to send after electrolysis Form sediment degradation chromium heavy metal, then is delivered to deep electrolytic slot.The invention is not high to the recovery utilization rate of water resource and useful component.
Summary of the invention
Goal of the invention:
Utilization can be separately recovered by providing utility in a kind of waste water, realize the electroplating waste water resource of harmful substance zero-emission The method utilized.
Technical solution:
The method that electroplating waste water resource of the invention utilizes, the processing step with following order:
1) it neutralizes filtering: alkali being added to adjust (the alkalescent, convenient for sulfate radical and heavy metal ion etc. in step of electroplating wastewater PH to 8 or so Metal salt is largely formed in rapid 5), alkali can select calcium hydroxide or sodium hydroxide.Electroplating wastewater after neutralization can use Filtering technology removes solid impurity, and the filter devices such as sand filtration or strainer can be selected to filter.
2) adsorption-desorption: filtered waste water is transported in absorbent charcoal adsorption tank, active carbon adsorption tank is continuously adsorbed to The COD of middle water stops absorption (organic matter major part adsorption-desorption is separated) after reaching 100-150mg/l, drains adsorption tanks In remaining waste water, be passed through steam desorption organic solvent, stripping vapor is sent into fractionating column, isolates organic solvent for the present invention It recycles.
3) UF membrane: the remaining waste water after reverse osmosis membrane ultrafiltration adsorption treatment can carry out multi-ultrafiltration, recycle 70% Above waste water, remaining is concentrating spent liquor.It can first be filtered before UF membrane, reduce the pollution and loss to ultrafiltration membrane.It is reverse osmosis Can carry out 1-3 times.
4) be concentrated by evaporation: with the recycle-water hot water heating of damp-heat air or fractionating column be concentrated waste water to 40-90 DEG C (sufficiently Using heat resources, temperature is less high, and a small amount of sour gas or organic substance is avoided to come out), water is evaporated in evaporator power Point, waste liquid is concentrated into saturated concentration or so.
5) evaporative crystallization: being transported in crystallization kettle, and the hot-air of wind pressure 1-5KPa and temperature 50-90% are blasted crystallization kettle, Saturation waste liquid is heated to 40-70 DEG C (convenient for the various different salts of Step crystallization separation), the moisture evaporation in waste liquid to air Middle formation saturation damp-heat discharge, saturation waste liquid is constantly concentrated, and after being more than saturated concentration, metal salt, which starts crystallizing out, to be come, point Walk Crystallization Separation.
6) it recycles damp and hot: the saturation damp-heat that crystallization kettle is discharged is discharged into the interlayer of semi-open type heat exchanger, be saturated damp and hot Cold surrounding air outside gas heating tube, own temperature decline, condensation vapor Cheng Shui therein, from the solidifying of semi-open type heat exchanger Overfall discharge is born water, spillage is collected and recycles.Gas emptying at the top of the tube side of semi-open type heat exchanger after cooling. And the air being heated is flowed out from semi-open type heat exchanger bottom, blasts crystallization kettle by blower, is recycled, it is energy-saving.
Recycle-water recycling after fractionating column and ultrafiltration, is recycled and reused for configuration electroplate liquid, saves water resource, do not introduce external dirt Contaminate substance.
The utility model has the advantages that
The method that electroplating waste water resource of the invention utilizes is to solve heavy metal in electroplating wastewater pollution, realizes the recycling of waste water Using providing a kind of technology utilization scheme.It recycles electroplating wastewater and recycles organic solvent and a variety of gold in electroplating wastewater Belong to salt, turn waste into wealth, realizes that electroplating waste water resource utilizes the zero-emission with pollutant.
Detailed description of the invention
Fig. 1 is a kind of process flow diagram of the invention;
In figure, 1- filter device;2- adsorption tanks;3- fractionating column;4- reverse osmosis membrane;5- evaporating column;6- crystallization kettle;The damp and hot reuse of 7- Device.
Specific embodiment
The method utilized using the electroplating waste water resource of process flow as shown in Figure 1, the technique with following order Step:
1) it neutralizes filtering: alkali being added to adjust electroplating wastewater PH to 8 or so.
2) adsorption-desorption: filtered waste water is transported in absorbent charcoal adsorption tank, drains the remaining waste water in adsorption tanks, It is passed through steam desorption organic solvent, stripping vapor is sent into fractionating column, organic solvent is isolated and is recycled for the present invention.
3) UF membrane: the remaining waste water after reverse osmosis membrane ultrafiltration adsorption treatment, it is reverse osmosis to carry out 2-3 times;Recycling benefit With 70% or more waste water, remaining is concentrating spent liquor;It is first filtered before UF membrane.
4) it is concentrated by evaporation: with the recycle-water hot water heating of damp-heat air or fractionating column concentration waste water to 60-90 DEG C, steaming Evaporation water in device is sent out, waste liquid is concentrated into saturated concentration or so.
5) evaporative crystallization: the waste liquid of concentration is transported in crystallization kettle, empty with the heat of wind pressure 3-5KPa and temperature 60-90% Tympanites enters crystallization kettle, and saturation waste liquid is heated to 65-70 DEG C, and the moisture evaporation in waste liquid forms saturation damp-heat row into air Out, saturation waste liquid is constantly concentrated into more than saturated concentration, and metal salt, which starts crystallizing out, to be come, fractional crystallization separation.
6) it recycles damp and hot: the saturation damp-heat that crystallization kettle is discharged is discharged into the interlayer of semi-open type heat exchanger, be saturated damp and hot Cold surrounding air outside gas heating tube, own temperature decline, condensation vapor Cheng Shui therein, from the solidifying of semi-open type heat exchanger Overfall discharge is born water, spillage is collected and recycles.The air being heated is flowed out from semi-open type heat exchanger bottom, by blower Blast crystallization kettle.

Claims (6)

1. a kind of method that electroplating waste water resource utilizes, it is characterised in that:
Processing step with following order:
1) it neutralizes filtering: alkali being added to adjust electroplating wastewater PH to 8 or so;
2) adsorption-desorption: filtered waste water is transported in absorbent charcoal adsorption tank, is drained the remaining waste water in adsorption tanks, is passed through Steam desorbs organic solvent, and stripping vapor is sent into fractionating column, organic solvent is isolated and recycles for the present invention;
3) UF membrane: the remaining waste water after reverse osmosis membrane ultrafiltration adsorption treatment, it is reverse osmosis to carry out 1-3 times;Recycle 70% Above waste water, remaining is concentrating spent liquor;
4) it is concentrated by evaporation: with the recycle-water hot water heating of damp-heat air or fractionating column concentration waste water to 40-90 DEG C, in evaporator Waste liquid is concentrated into saturated concentration or so by middle evaporation water;
5) evaporative crystallization: the waste liquid of concentration is transported in crystallization kettle, blasts crystallization kettle with hot-air, and saturation waste liquid is heated to 50-70 DEG C, the moisture evaporation in waste liquid forms saturation damp-heat discharge into air, and it is more than saturation that saturation waste liquid, which is constantly concentrated into, Concentration, metal salt, which starts crystallizing out, to be come, fractional crystallization separation;
6) it recycles damp and hot: the saturation damp-heat that crystallization kettle is discharged is discharged into the interlayer of semi-open type heat exchanger, saturation damp-heat adds Cold surrounding air outside heat pipe, own temperature decline, condensation vapor Cheng Shui therein, from the condensed water of semi-open type heat exchanger Overfall discharge is collected spillage and is recycled.
2. the method that electroplating waste water resource as described in claim 1 utilizes, it is characterised in that: processing step 1) in, it neutralizes Electroplating wastewater afterwards removes solid impurity using the filtering technique of sand filtration or strainer.
3. the method that electroplating waste water resource as described in claim 1 utilizes, it is characterised in that: processing step 2) in, continuously The COD for being adsorbed to water in active carbon adsorption tank reaches i.e. stopping absorption after 100-150mg/l.
4. the method that electroplating waste water resource as described in claim 1 utilizes, it is characterised in that: processing step 3) in, film point From first filtering before.
5. the method that electroplating waste water resource as described in claim 1 utilizes, it is characterised in that: processing step 5) in, use wind The hot-air of pressure 1-5KPa and temperature 50-90% blasts crystallization kettle.
6. the method that electroplating waste water resource as described in claim 1 utilizes, it is characterised in that: processing step 6) in, added The air of heat is flowed out from semi-open type heat exchanger bottom, blasts crystallization kettle by blower.
CN201910273855.4A 2019-04-07 2019-04-07 The method that electroplating waste water resource utilizes Pending CN110204136A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111573942A (en) * 2020-04-30 2020-08-25 杭州临安兴旺电镀有限公司 Method for recycling copper-nickel electroplating waste liquid

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103204601A (en) * 2013-04-23 2013-07-17 清华大学 Wastewater treatment method
CN106564987A (en) * 2016-10-17 2017-04-19 中国有色集团(广西)平桂飞碟股份有限公司 Ion exchange process for recovering tungsten from tungsten-containing diluted solution wastewater
CN107473483A (en) * 2017-09-20 2017-12-15 四川中丹合创环保科技有限公司 A kind of method of electroplating wastewater zero processing
CN108640397A (en) * 2018-07-20 2018-10-12 刘柏海 A kind of heat-engine plant desulfurized waste water treatment process based on inorganic adsorbent technology
CN108862856A (en) * 2018-07-05 2018-11-23 上海文赟环境工程事务所 A kind of acetate fiber waste water reclaiming processing method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103204601A (en) * 2013-04-23 2013-07-17 清华大学 Wastewater treatment method
CN106564987A (en) * 2016-10-17 2017-04-19 中国有色集团(广西)平桂飞碟股份有限公司 Ion exchange process for recovering tungsten from tungsten-containing diluted solution wastewater
CN107473483A (en) * 2017-09-20 2017-12-15 四川中丹合创环保科技有限公司 A kind of method of electroplating wastewater zero processing
CN108862856A (en) * 2018-07-05 2018-11-23 上海文赟环境工程事务所 A kind of acetate fiber waste water reclaiming processing method
CN108640397A (en) * 2018-07-20 2018-10-12 刘柏海 A kind of heat-engine plant desulfurized waste water treatment process based on inorganic adsorbent technology

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111573942A (en) * 2020-04-30 2020-08-25 杭州临安兴旺电镀有限公司 Method for recycling copper-nickel electroplating waste liquid

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