CN100354215C - Zero-discharge reclamation method of electroplating wastewater and apparatus thereof - Google Patents

Zero-discharge reclamation method of electroplating wastewater and apparatus thereof Download PDF

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Publication number
CN100354215C
CN100354215C CNB2006100330473A CN200610033047A CN100354215C CN 100354215 C CN100354215 C CN 100354215C CN B2006100330473 A CNB2006100330473 A CN B2006100330473A CN 200610033047 A CN200610033047 A CN 200610033047A CN 100354215 C CN100354215 C CN 100354215C
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waste water
wastewater
ion exchange
nickel
filter
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CNB2006100330473A
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CN1803657A (en
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梁林标
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梁林标
梁锦辉
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Abstract

The present invention relates to a zero discharge method for treating and reclaiming electroplating wastewater, which comprises: the classification of electroplating wastewater comprises that the wastewater is respectively introduced into a reaction tank of the wastewater; the treated wastewater with copper, the treated wastewater with chromium and the treated wastewater with cyanogen are respectively introduced into a solid-phase separation device for carrying out the preliminary solid-phase separation; after being filtered by a filtration post, the wastewater with nickel is treated by an ion exchange device; pretreatment wastewater is filtered orderly by a sand filter and a carbon filter. The method has the advantages of stable technology, easy operation, easy control, safety, reliability and low operation cost, and realizes the zero discharge of the electroplating wastewater. The device used in the method comprises a device for treating and reclaiming the wastewater with copper, a device for treating and reclaiming the wastewater with chromium, a device for treating and reclaiming the wastewater with cyanogen, a device for treating and reclaiming the pretreatment wastewater, and a device for treating and reclaiming the wastewater with nickel.

Description

Zero-release recovery method for electroplated sewage and device thereof
Technical field
The present invention relates to a kind of wastewater treatment method, particularly a kind of zero-release recovery method for electroplated sewage from electroplating process.
The invention still further relates to a kind of device of realizing aforesaid method.
Background technology
Contain a large amount of poisonous and hazardous heavy metal ion, prussiate etc. in the electroplating wastewater, there is following defective in the treatment process of electroplating wastewater mainly according to the highway route design of " qualified discharge " at present: 1. water resources is underused and directly discharging; 2. heavy metal ion 100% is not eliminated as yet, and environmental pollution still exists.3. the working cost of Chu Liing 2-3 unit/ton at least, general 4-5 unit/ton, high person reaches 6-7 unit/ton, enterprise is difficult to bear, cause enterprise steal row, with tap water towards behaviors such as rare back dischargings, the increase environment is supervised difficulty.4. do not meet the requirement of cleaner production, be unfavorable for electroplating the Sustainable development of industry yet.
Problem about four aspects existing in " qualified discharge " technological line that how to solve electroplating wastewater makes electroplating wastewater reach zero release, and various technological lines are arranged.The for example domestic membrane technique of having reported that the common exploitation of Liyuan New Material Co Ltd, Changsha and Hangzhou Water Treatment Technology Development Center, State Oceanic Administration is arranged makes the processing of nickel-plating waste water reach zero release.But how electroplating wastewater that all each platings produce can both be reached zero release after treatment, report is not arranged so far.
Summary of the invention
The present invention has overcome deficiency of the prior art, and a kind of zero-release recovery method for electroplated sewage is provided, by " effluent segregation is handled respectively; Reclaim clear water, reclaim metal " technological line, realize electroplating wastewater zero, and reclaim clear water, metal and other resource.
Another object of the present invention is to provide a kind of device of realizing aforesaid method.
Zero-release recovery method for electroplated sewage of the present invention is characterized in that comprising the steps:
(1) electroplating wastewater classification: electroplating wastewater is divided into copper-containing wastewater, chromate waste water, cyanide wastewater, nickel-containing waste water, pre-treatment waste water five class waste water;
(2) above-mentioned copper-containing wastewater, chromate waste water, cyanide wastewater, nickel-containing waste water are introduced the waste water reaction pond respectively, add precipitation agent respectively, regulate the pH value, make that the heavy metal ion in the above-mentioned five class waste water precipitates; Above-mentioned pre-treatment waste water is introduced the waste water reaction pond, regulate the pH value; The consumption of precipitation agent and pH value are not strict with, with realize economy principle and reach be precipitated as suitable.
(3) will introduce the solid phase tripping device respectively through copper-containing wastewater, chromate waste water, cyanide wastewater three class waste water after step (2) is handled and carry out preliminary solid phase separation, obtain solid phase and liquid phase, solid phase is carried out reclaiming after the press filtration, after liquid phase filtered, obtain clear water by the ion exchange unit processing, reclaim clear water;
(4) will be after post filter after filtration through the nickel-containing waste water after step (2) is handled, handle to obtain regenerated liquid and clear water by ion exchange unit, reclaim clear water;
(5) will after the pre-treatment waste water after step (2) is handled filters by sand filter, carbon filter successively, obtain clear water, reclaim clear water by the reverse osmosis unit processing;
(6) regenerated liquid that step (4) is obtained is introduced reaction settling basin, adds precipitation agent, regulates the pH value and makes the nickel ion precipitation obtain throw out, to throw out press filtration, recovery.
In the described step (1), copper-containing wastewater is the waste water that electroplating acid copper washing back produces; Chromate waste water is the waste water of electrodeposited chromium generation and the passivating solution that contains chromium; Cyanide wastewater is to electroplate to contain the waste water that the cyanogen plating is produced; Nickel-containing waste water is to electroplate the waste water that light nickel, mute nickel, half light nickel, pearl nickel and composition thereof are produced; Pre-treatment waste water is alkali metal containing and/or alkaline-earth metal ions, does not contain the waste water of heavy metal ion.
In the described step (2), the precipitation agent that adds in the copper-containing wastewater reaction tank is a sodium hydroxide, and regulating pH value scope is 8~8.5; The precipitation agent that adds in the chromate waste water reaction tank is ferrous sulfate or Sodium Pyrosulfite, and regulating pH value scope is 7~8.5; The precipitation agent that adds in the cyanide wastewater reaction tank is a clorox, and regulating the pH value is 11; The precipitation agent yellow soda ash that in the nickel-containing waste water reaction tank, adds, regulating the pH value is 4.5-5; Regulating pH value scope in pre-treatment waste water reaction pond is 6~9.
In the described step (3), the solid phase tripping device is a tube settler, and ion exchange unit is an ion exchange column, and the exchanger that ion exchange column uses is hydrochloric acid and sodium hydroxide.
In the described step (4), ion exchange unit is an ion exchange column, and the exchanger that ion exchange column uses is sodium-chlor.
In the described step (5), reverse osmosis unit is the reverse osmosis machine with reverse osmosis membrane.
In the described step (6), precipitation agent is a yellow soda ash, and the pH value is 8.5.
During processing, carry out at practical situation, for example electroplating wastewater has only copper-containing wastewater, chromate waste water, cyanide wastewater, then at this in three waste water handle.
A kind of device of realizing aforesaid method comprises copper-containing wastewater, chromate waste water, treatment of cyanide waste water reclamation set, the processing reclamation set of pre-treatment waste water, and the processing reclamation set of nickel-containing waste water, wherein:
Described copper-containing wastewater, chromate waste water, treatment of cyanide waste water reclamation set comprise waste water reaction pond, lift pump, tube settler, pressure filter, filtration unit (A), ion exchange column, retention basin, wherein the waste water reaction pond is connected with tube settler by lift pump, tube settler one end is connected with pressure filter by pipeline, the other end is connected with filtration unit (A), filtration unit (A) is connected with ion exchange column by pipeline, and ion exchange column connects and composes by pipeline and retention basin;
The processing reclamation set of described pre-treatment waste water comprises waste water reaction pond, lift pump, filtration unit (B), reverse osmosis machine, wherein the waste water reaction pond is connected with filtration unit (B) by lift pump, filtration unit (B) is connected with reverse osmosis machine, and reverse osmosis machine connects production line water supply end and constitutes;
The processing reclamation set of described nickel-containing waste water comprises waste water reaction pond, lift pump, filtration unit (C), ion exchange column, reaction settling basin, retention basin, pressure filter, wherein the waste water reaction pond is connected with filtration unit (C) by lift pump, filtration unit (C) is connected with ion exchange column by pipeline, ion exchange column one end is connected with reaction settling basin by pipeline, the other end is connected with retention basin by pipeline, and reaction settling basin connects and composes by pipeline and pressure filter.
Described filtration unit (A) is a strainer, and described filtration unit (B) comprises sand filter, carbon filter, and wherein sand filter connects and composes by pipeline and carbon filter, and described filtration unit (C) is a sand carbon Filter column.
The present invention compared with prior art has following advantage: realize zero release substantially through the electroplating wastewater that present method is handled, and can recycle; Present method process stabilizing, easy and simple to handle, be easy to control, safe and reliable, working cost is lower, and can reclaim metal and other resource.
Description of drawings
Fig. 1 is copper-containing wastewater, chromate waste water, treatment of cyanide waste water reclamation set synoptic diagram, among the figure: the 1st, waste water reaction pond, the 2nd, lift pump, the 3rd, tube settler, the 4th, strainer, the 5th, pressure filter, the 6th, cationic exchange coloum, the 7th, anion-exchange column, the 8th, retention basin.
Fig. 2 is the processing reclamation set synoptic diagram of pre-treatment waste water, among the figure: the 1st, the waste water reaction pond, the 2nd, lift pump, 3 ' is sand filter, and 4 ' is carbon filter, and 5 ' is reverse osmosis machine.
Fig. 3 is the processing reclamation set synoptic diagram of nickel-containing waste water, among the figure: the 1st, waste water reaction pond, the 2nd, lift pump, 3 " be sand carbon Filter column, 4 " be ion exchange column, 5 " be reaction settling basin, 6 " be pressure filter, 7 " be retention basin.
Embodiment
As shown in Figure 1, copper-containing wastewater, chromate waste water, treatment of cyanide waste water reclamation set are connected with tube settler 3 by lift pump 2 by waste water reaction pond 1; Tube settler 3 one ends are connected with pressure filter 5 by pipeline, and the other end is connected with strainer 4; Strainer 4 is connected with cationic exchange coloum 6 by pipeline, and cationic exchange coloum 6 is connected with anion-exchange column 7, and anion-exchange column 7 connects and composes by pipeline and retention basin 8.
As shown in Figure 2, the processing reclamation set of pre-treatment waste water is connected with sand filter 3 by lift pump 2 by waste water reaction pond 1, sand filter 3 is connected with carbon filter 4 ' by pipeline, and carbon filter 4 ' is connected with reverse osmosis machine 5 ', and reverse osmosis machine 5 ' supplies water to hold with production line and connects and composes.
As shown in Figure 3, the processing reclamation set of nickel-containing waste water is connected with sand carbon Filter column 3 by lift pump 2 by waste water reaction pond 1, sand carbon Filter column 3 is by pipeline and ion exchange column 4 " be connected; ion exchange column 4 " end is by pipeline and reaction settling basin 5 " be connected; the other end is by pipeline and retention basin 7 " be connected, reaction settling basin is by pipeline and pressure filter 6 ' ' connect and compose.
Embodiment 1
Device processes copper-containing wastewater with Fig. 1.
Add precipitation agent sodium hydroxide in the copper-containing wastewater reaction tank, regulating pH value scope is 8; Copper-containing wastewater after handling is introduced the solid phase tripping device carry out preliminary solid phase separation, obtain solid phase and liquid phase, solid phase is carried out reclaiming after the press filtration, after liquid phase is filtered, obtain clear water, reclaim clear water by the ion exchange unit processing;
Described solid phase tripping device is a tube settler, and ion exchange unit is an ion exchange column, and the exchanger that ion exchange column uses is hydrochloric acid and sodium hydroxide.
Embodiment 2 adopts the device shown in Fig. 1,2,3 to handle.
Copper-containing wastewater, chromate waste water, cyanide wastewater, nickel-containing waste water, pre-treatment waste water are introduced the waste water reaction pond respectively;
Add precipitation agent sodium hydroxide in the copper-containing wastewater reaction tank, regulating pH value scope is 8.5;
The precipitation agent ferrous sulfate that in the chromate waste water reaction tank, adds, regulating the pH value is 8.5;
The precipitation agent clorox that in the cyanide wastewater reaction tank, adds, regulating the pH value is 11;
The precipitation agent yellow soda ash that in the nickel-containing waste water reaction tank, adds, regulating the pH value is 5;
Regulating pH value scope in pre-treatment waste water reaction pond is 9.
Copper-containing wastewater, chromate waste water, cyanide wastewater three class waste water after handling are introduced the solid phase tripping device respectively carry out preliminary solid phase separation, obtain solid phase and liquid phase, solid phase is carried out reclaiming after the press filtration, after liquid phase is filtered, obtain clear water by the ion exchange unit processing, reclaim clear water; The solid phase tripping device is a tube settler, and ion exchange unit is an ion exchange column, and the exchanger that ion exchange column uses is hydrochloric acid and sodium hydroxide.
After post filters after filtration with the nickel-containing waste water after handling, obtain regenerated liquid and clear water, reclaim clear water by the ion exchange unit processing; The regenerated liquid that obtains is introduced reaction settling basin, adds precipitation agent yellow soda ash, regulates pH value and is 8.5 and nickel ion is precipitated obtain throw out, to throw out press filtration, recovery.
Pre-treatment waste water after handling successively by after sand filter, the carbon filter filtration, is obtained clear water by the reverse osmosis machine processing with reverse osmosis membrane, reclaim clear water;
Embodiment 3 adopts the device shown in Fig. 1,2,3 to handle.
Copper-containing wastewater, chromate waste water, cyanide wastewater, nickel-containing waste water, pre-treatment waste water are introduced the waste water reaction pond respectively;
Add precipitation agent sodium hydroxide in the copper-containing wastewater reaction tank, regulating pH value scope is 8;
The precipitation agent Sodium Pyrosulfite that in the chromate waste water reaction tank, adds, regulating the pH value is 7;
The precipitation agent clorox that in the cyanide wastewater reaction tank, adds, regulating the pH value is 11;
The precipitation agent yellow soda ash that in the nickel-containing waste water reaction tank, adds, regulating the pH value is 4.5;
Regulating pH value scope in pre-treatment waste water reaction pond is 6.
Copper-containing wastewater, chromate waste water, cyanide wastewater three class waste water after handling are introduced the solid phase tripping device respectively carry out preliminary solid phase separation, obtain solid phase and liquid phase, solid phase is carried out reclaiming after the press filtration, after liquid phase is filtered, obtain clear water by the ion exchange unit processing, reclaim clear water; The solid phase tripping device is a tube settler, and ion exchange unit is an ion exchange column, and the exchanger that ion exchange column uses is hydrochloric acid and sodium hydroxide.
After post filters after filtration with the nickel-containing waste water after handling, obtain regenerated liquid and clear water, reclaim clear water by the ion exchange unit processing; The regenerated liquid that obtains is introduced reaction settling basin, adds precipitation agent yellow soda ash, regulates pH value and is 8.5 and nickel ion is precipitated obtain throw out, to throw out press filtration, recovery.
Pre-treatment waste water after handling successively by after sand filter, the carbon filter filtration, is obtained clear water by the reverse osmosis machine processing with reverse osmosis membrane, reclaim clear water.

Claims (6)

1, a kind of zero-release recovery method for electroplated sewage is characterized in that comprising the steps:
(1) electroplating wastewater classification: electroplating wastewater is divided into copper-containing wastewater, chromate waste water, cyanide wastewater, nickel-containing waste water, pre-treatment waste water five class waste water; Copper-containing wastewater is the waste water that electroplating acid copper washing back produces; Chromate waste water is the waste water of electrodeposited chromium generation and the passivating solution that contains chromium; Cyanide wastewater is to electroplate to contain the waste water that the cyanogen plating is produced; Nickel-containing waste water is to electroplate the waste water that light nickel, mute nickel, half light nickel, pearl nickel and composition thereof are produced; Pre-treatment waste water is alkali metal containing and/or alkaline-earth metal ions, does not contain the waste water of heavy metal ion;
(2) above-mentioned copper-containing wastewater, chromate waste water, cyanide wastewater, nickel-containing waste water are introduced the waste water reaction pond respectively, add precipitation agent respectively, regulate the pH value, the precipitation agent that adds in the copper-containing wastewater reaction tank is a sodium hydroxide, and regulating pH value scope is 8~8.5; The precipitation agent that adds in the chromate waste water reaction tank is ferrous sulfate or Sodium Pyrosulfite, and regulating pH value scope is 7~8.5; The precipitation agent that adds in the cyanide wastewater reaction tank is a clorox, and regulating the pH value is 11; The precipitation agent yellow soda ash that in the nickel-containing waste water reaction tank, adds, regulating the pH value is 4.5-5; Make the heavy metal ion in the above-mentioned waste water precipitate; Above-mentioned pre-treatment waste water is introduced the waste water reaction pond, and regulating the pH value is 6~9;
(3) will introduce the solid phase tripping device respectively through copper-containing wastewater, chromate waste water, cyanide wastewater three class waste water after step (2) is handled and carry out preliminary solid phase separation, obtain solid phase and liquid phase, solid phase is carried out reclaiming after the press filtration, after liquid phase filtered, obtain clear water by the ion exchange unit processing, reclaim clear water;
(4) will be after post filter after filtration through the nickel-containing waste water after step (2) is handled, handle to obtain regenerated liquid and clear water by ion exchange unit, reclaim clear water;
(5) will after the pre-treatment waste water after step (2) is handled filters by sand filter, carbon filter successively, obtain clear water, reclaim clear water by the reverse osmosis unit processing;
(6) regenerated liquid that step (4) obtained is introduced reaction settling basin, adds precipitation agent yellow soda ash, regulates pH value and is 8.5 and nickel ion is precipitated obtain throw out, to throw out press filtration, recovery.
2, method according to claim 1 is characterized in that the solid phase tripping device is a tube settler in the step (3), and ion exchange unit is an ion exchange column, and the exchanger that ion exchange column uses is hydrochloric acid and sodium hydroxide.
3, method according to claim 2 is characterized in that in the step (4), ion exchange unit is an ion exchange column, and the exchanger that ion exchange column uses is sodium-chlor.
4, method according to claim 3 is characterized in that in the step (5), reverse osmosis unit is the reverse osmosis machine with reverse osmosis membrane.
5, realize the device of one of claim 1~4 described method, it is characterized in that comprising copper-containing wastewater, chromate waste water, treatment of cyanide waste water reclamation set, the processing reclamation set of pre-treatment waste water, the processing reclamation set of nickel-containing waste water, wherein:
Described copper-containing wastewater, chromate waste water, treatment of cyanide waste water reclamation set comprise waste water reaction pond, lift pump, tube settler, pressure filter, filtration unit (A), ion exchange column, retention basin, wherein the waste water reaction pond is connected with tube settler by lift pump, tube settler one end is connected with pressure filter by pipeline, the other end is connected with filtration unit (A), filtration unit (A) is connected with ion exchange column by pipeline, and ion exchange column connects and composes by pipeline and retention basin;
The processing reclamation set of described pre-treatment waste water comprises waste water reaction pond, lift pump, sand filter, carbon filter, reverse osmosis machine, wherein the waste water reaction pond is connected with sand filter by lift pump, sand filter is connected with carbon filter by pipeline, carbon filter is connected with reverse osmosis machine, and reverse osmosis machine connects production line water supply end and constitutes;
The processing reclamation set of described nickel-containing waste water comprises waste water reaction pond, lift pump, Filter column, ion exchange column, reaction settling basin, retention basin, pressure filter, wherein the waste water reaction pond is connected with Filter column by lift pump, Filter column is connected with ion exchange column by pipeline, ion exchange column one end is connected with reaction settling basin by pipeline, the other end is connected with retention basin by pipeline, and reaction settling basin connects and composes by pipeline and pressure filter.
6, device according to claim 5 is characterized in that described filtration unit (A) is a strainer, and described Filter column is a sand carbon Filter column.
CNB2006100330473A 2006-01-18 2006-01-18 Zero-discharge reclamation method of electroplating wastewater and apparatus thereof CN100354215C (en)

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TWI655325B (en) * 2018-06-20 2019-04-01 泰威興業股份有限公司 Electroplating equipment

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CN102372354A (en) * 2010-08-20 2012-03-14 山东国强五金科技股份有限公司 Taxonomic treatment and circular utilization method of electroplating waste water
CN102161548A (en) * 2011-04-15 2011-08-24 梁林标 Method for recycling and treating electroplating wastewater and equipment thereof
CN102515436A (en) * 2011-12-19 2012-06-27 广东新大禹环境工程有限公司 Technology for processing wastewaters in PCB (printed circuit board) industrial park
CN103058420A (en) * 2013-01-23 2013-04-24 永兴鑫裕环保镍业有限公司 Industrial wastewater treatment system
CN103819021A (en) * 2014-02-27 2014-05-28 南昌航空大学 Method for processing heavy metal waste pipe
CN105016521A (en) * 2015-06-30 2015-11-04 苏州华日金菱机械有限公司 Method for processing electroplating wastewater
CN105366767B (en) * 2015-12-10 2018-01-12 重庆青天环保材料有限公司 The processing system and processing method of a kind of cyanide-containing electroplating water
CN105948171A (en) * 2016-05-26 2016-09-21 广东溢丰环保科技有限公司 Method for deep treatment of electroplating wastewater by ion exchange resin
CN106865831A (en) * 2017-04-19 2017-06-20 杭州意来客电器设备有限公司 Sewage water treatment method and application
CN109160643A (en) * 2018-08-28 2019-01-08 苏州爱源环境工程技术服务有限公司 A kind of method of electroplating wastewater recycling gold

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