CN103951108A - Process method for treating electroplating comprehensive wastewater - Google Patents
Process method for treating electroplating comprehensive wastewater Download PDFInfo
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- CN103951108A CN103951108A CN201410175487.7A CN201410175487A CN103951108A CN 103951108 A CN103951108 A CN 103951108A CN 201410175487 A CN201410175487 A CN 201410175487A CN 103951108 A CN103951108 A CN 103951108A
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Abstract
The invention discloses a process method for treating electroplating comprehensive wastewater, and relates to the field of electroplating wastewater treatment. The method at least comprises the following steps: a, intensively exhausting wastewater into a comprehensive wastewater tank, pumping the wastewater into an oil removing tank by a pump, and entering a settling tank through a regulating tank; b, pumping out a liquid supernatant of the settling tank by the pump to enter quartz sand, active carbon and a microfiltration column to further filter water for mainly removing fine suspended matters of organic substances in the wastewater. The process method disclosed by the invention can be used for directly mixing wastewater of an electroplating workshop without pretreatment and separating treatment, and does not need to regulate PH value in stages; all wastewater passes through in one step, and the process flow is simple, so that operation of a worker and industrial production are facilitated; moreover, heavy metals and water resource can be recycled from electroplating wastewater, so that pollution of wastewater on environment is relieved or avoided, and electroplating clean production is realized, and therefore, electroplating wastewater of gold, sliver, nickel, copper, and the like, with higher additional value can be absorbed and recycled by resin, and good economic benefits are produced.
Description
Technical field
The present invention relates to electroplating sewerage process field; Relate in particular to a kind of processing method of processing electroplating comprehensive waste water.
Background technology
Electroplating technology is widely used in the industries such as manufacture, light industry, electronics, the composition of electroplating wastewater is very complicated, except containing cyanogen (CN-) waste water and acidic and alkaline waste water, heavy metal wastewater thereby is the great waste water classification of Electroplating Operations potential hazard, the improvement of electroplating wastewater at home and abroad generally comes into one's own, develop multiple improvement technology, by by poisonous improvement being nontoxic, harmful harmless, to reclaim the measure eliminations such as noble metal, water cycle use and minimizing heavy metal quantity discharged that is converted into; Along with the fast development of electroplating industry and the raising day by day of environmental requirement, at present, oneself starts to enter process for cleanly preparing, overall control and recycling economy conformity stage Electroplating Wastewater Treatment, resource recycling and closed cycle are the main flow directions of development, traditional is that waste electroplating treatment process has: chemical method, ion exchange method, electrolytic process etc., but conventional process electroplating wastewater there are the following problems:
(1) high cost---water cannot recycle, and water rate and sewage disposal expense account for 15%～20% of total cost of production.
(2) wasting of resources---noble metal is discharged in water body, cannot recycle.
(3) environmental pollution---the heavy metal in electroplating wastewater is " contact scar thing forever ", shifts and accumulation in biologic chain, and final harm humans is healthy.
Summary of the invention
The present invention processes electroplating wastewater high cost and environmental pollution in prior art deficiency for overcoming provides a kind of processing method of processing electroplating comprehensive waste water, the feature that the method has low cost, resource recycling and reduces environmental pollution.
A processing method of processing electroplating comprehensive waste water, the method at least comprises the following steps:
A, each road Waste Water Centralized are discharged into comprehensive wastewater pond, with pump, be extracted into grease removal tank again, in grease removal tank ingress, lattice hurdle is set, waste water is removed most of oil slick through grease removal tank, through equalizing tank, enter settling tank, through settling tank natural sedimentation, after several hours, can remove some large suspended substances and other impurity; The a small amount of mud producing in settling tank enters into sludge sump through the extraction of sludge pump, after processing, supernatant liquor is entered to comprehensive wastewater pond again and again process in sludge sump;
The supernatant liquor of b, settling tank is extracted out and is entered quartz sand, gac and micro-filtration post further to water filtration with pump, mainly removes the organic trickle suspended substance in waste water;
The water that c, process are filtered enters calcium magnesium resin column, the calcium ions and magnesium ions in absorption waste water;
The waste water of d, above-mentioned processing enters sexavalent chrome resin column and removes trivalent chromium resin column, and now comprehensive wastewater PH is between 1.0-2.0, and under this acidity, this resin is very strong to the adsorptive power of chromium;
The waste water of e, this processing enters next group except acid resin, and this resin can be transferred to the pH value of waste water between 3-13;
F, through adjusting the processing water of pH value to enter successively de-iron zinc, remove copper, remove nickel, dephosphorization, remove cyanogen, go the resin column of COD and deammoniation nitrogen to adsorb, water outlet can reach national up-to-date emission standard, can be back to use plating shop;
G, the resin column of processing in above-mentioned c, d, e, f step is reused after wash-out;
H, the heavy metal eluting is processed respectively to recovery.
Above-mentioned resin column adsorption process all adopts multicolumn series connection alternate run mode, and wash-out is carried out in the saturated rear disconnection of front pillar, and rear pillar is proceeded adsorption process, and the resin column after wash-out continues operation as rear pillar.
Above-mentionedly remove copper, go the resin column of nickel and de-iron zinc to adopt 4% sulfuric acid to carry out wash-out.
Above-mentionedly remove sexavalent chrome, remove trivalent chromium, dephosphorization and go the resin column of cyanogen to adopt 3% sodium hydroxide to carry out wash-out.
Above-mentioned disacidify, go the resin column of COD and deammoniation nitrogen to adopt 4% hydrochloric acid to carry out wash-out.
Above-mentioned to go calcium magnesium resin model be TM-60, and going sexavalent chrome resin column model is XJ135; Going trivalent chromium resin column model is XJ331, and disacidify resin column model is D547; Going resin of copper model is N931, and going nickel resin column model is N932, and dephosphorization resin column model is J-23; Going COD resin column model is C-15, and deammoniation nitrogen resin column model is T-45.
In above-mentioned steps h, adopt extraction process that the heavy metal solution eluting is carried out to extracting and separating.
Beneficial effect of the present invention: processing method provided by the invention can be without pre-treatment and separating treatment, directly the waste water combination treatment of all plating shops; Secondly need not regulate stage by stage pH value; All waste water is disposable to be passed through, and technical process is simple, is convenient to workman's operation and suitability for industrialized production; And can from electroplating wastewater, reclaim heavy metal and water resources, alleviate or stop the pollution of waste water to environment, realize the cleaner production of electroplating, to electroplating wastewaters such as the higher gold and silver of added value, nickel, copper, can recycle by resin absorption, and produce good economic benefit.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
For better explanation the present invention, be now described further by reference to the accompanying drawings.
A processing method of processing electroplating comprehensive waste water, comprises the following steps:
A, each road Waste Water Centralized are discharged into comprehensive wastewater pond, with pump, be extracted into grease removal tank again, in grease removal tank ingress, lattice hurdle is set, waste water is removed most of oil slick through grease removal tank, through equalizing tank, enter settling tank, through settling tank natural sedimentation, after several hours, can remove some large suspended substances and other impurity; The a small amount of mud producing in settling tank enters into sludge sump through the extraction of sludge pump, after processing, supernatant liquor is entered to comprehensive wastewater pond again and again process in sludge sump;
The supernatant liquor of b, settling tank is extracted out and is entered quartz sand, gac and micro-filtration post further to water filtration with pump, mainly removes the organic trickle suspended substance in waste water;
The water that c, process are filtered enters calcium magnesium resin column, the calcium ions and magnesium ions in absorption waste water;
The waste water of d, above-mentioned processing enters sexavalent chrome resin column and removes trivalent chromium resin column, and now comprehensive wastewater PH is between 1.0-2.0, and under this acidity, this resin is very strong to the adsorptive power of chromium;
The waste water of e, this processing enters next group except acid resin, and this resin can be transferred to the pH value of waste water between 3-13;
F, through adjusting the processing water of pH value to enter successively de-iron zinc, remove copper, remove nickel, dephosphorization, remove cyanogen, go the resin column of COD and deammoniation nitrogen to adsorb, water outlet can reach national up-to-date emission standard, can be back to use plating shop;
G, the resin column of processing in above-mentioned c, d, e, f step is reused after wash-out;
H, the heavy metal eluting is processed respectively to recovery.
Resin column adsorption process all adopts multicolumn series connection alternate run mode, and wash-out is carried out in the saturated rear disconnection of front pillar, and rear pillar is proceeded adsorption process, and the resin column after wash-out continues operation as rear pillar.
Remove copper, go the sulfuric acid of the resin column employing 4% of nickel and de-iron zinc to carry out wash-out.
Remove sexavalent chrome, remove trivalent chromium, dephosphorization and go the resin column of cyanogen to adopt 3% sodium hydroxide to carry out wash-out.
Disacidify, go the resin column of COD and deammoniation nitrogen to adopt 4% hydrochloric acid to carry out wash-out.
Going calcium magnesium resin model is TM-60, and going sexavalent chrome resin column model is XJ135; Going trivalent chromium resin column model is XJ331, and disacidify resin column model is D547; Going resin of copper model is N931, and going nickel resin column model is N932, and dephosphorization resin column model is J-23; Going COD resin column model is C-15, and deammoniation nitrogen resin column model is T-45.
In step h, adopt extraction process that the heavy metal solution eluting is carried out to extracting and separating.
As shown in Figure 1, workflow of the present invention is: plating shop comprehensive wastewater is directly discharged into comprehensive wastewater pond, then pass through grease removal tank, equalizing tank and settling tank, the a small amount of mud producing in settling tank enters into next step sludge sump through the extraction of sludge pump, after processing in sludge sump, supernatant liquor is entered to comprehensive wastewater pond again and again process; Mud in sludge sump enters pressure filter through pneumatic diaphragm pump, and mud is pressed dry.
And a large amount of in settling tank processed supernatant liquor and extract out with pump and enter quartz sand and active carbon filtration further to water filtration, mainly remove the organic trickle suspended substance in waste water; Then enter successively calcium magnesium resin column, remove sexavalent chrome resin column, remove trivalent chromium resin column, deacidification resin column, de-iron zinc resin column, remove resin of copper post, remove nickel resin column, dephosphorization resin column, remove cyanogen resin column, remove COD resin column and deammoniation nitrogen resin column, sewage now can reach industrial discharge rank, also the sewage of processing can be recycled pure water by reverse osmosis technology.
The present invention tests respectively the indices such as its ionic concn, PH and specific conductivity by the comprehensive wastewater of plating shop before processing with after processing, as shown in Table 1, after processing method of the present invention is processed, concentration of heavy metal ion, concentration of cyanide, COD concentration and ammonia nitrogen concentration reduce greatly, and filth-discharging effect is splendid
Table one: electroplating comprehensive waste water is processed every test index of front and back
| Test index | Before processing | After processing |
| Copper Cu(mg/L) | 114.65 | 0.035 |
| Nickel (mg/L) | 99.75 | 0.067 |
| Sexavalent chrome Cr 6+（mg/L） | 120.9 | 0.004 |
| Trivalent chromium Cr 3+（mg/L） | 56.9 | 0.001 |
| Iron Fe(mg/L) | 7.65 | 0.124 |
| Zinc Zn(mg/L) | 160 | 0.024 |
| Aluminium Al(mg/L) | － | － |
| Calcium Ca(mg/L) | － | － |
| Phosphorus P(mg/L) | 298 | 0.001 |
| Prussiate CN(mg/L) | 56 | 0.001 |
| COD（mg/L） | 424 | 12.04 |
| Ammonia nitrogen NH 3-N（mg/L） | 83.8 | 0.268 |
| PH | 2 | 6 |
| Specific conductivity (us/cm) | 14980 | 85 |
Claims (7)
1. a processing method of processing electroplating comprehensive waste water, is characterized in that: the method at least comprises the following steps:
A, each road Waste Water Centralized are discharged into comprehensive wastewater pond, with pump, be extracted into grease removal tank again, in grease removal tank ingress, lattice hurdle is set, waste water is removed most of oil slick through grease removal tank, through equalizing tank, enter settling tank, through settling tank natural sedimentation, after several hours, can remove some large suspended substances and other impurity; The a small amount of mud producing in settling tank enters into sludge sump through the extraction of sludge pump, after processing, supernatant liquor is entered to comprehensive wastewater pond again and again process in sludge sump;
The supernatant liquor of b, settling tank is extracted out and is entered quartz sand, gac and micro-filtration post further to water filtration with pump, mainly removes the organic trickle suspended substance in waste water;
The water that c, process are filtered enters calcium magnesium resin column, the calcium ions and magnesium ions in absorption waste water;
The waste water of d, above-mentioned processing enters sexavalent chrome resin column and removes trivalent chromium resin column, and now comprehensive wastewater PH is between 1.0-2.0, and under this acidity, this resin is very strong to the adsorptive power of chromium;
The waste water of e, this processing enters next group except acid resin, and this resin can be transferred to the pH value of waste water between 3-13;
F, through adjusting the processing water of pH value to enter successively de-iron zinc, remove copper, remove nickel, dephosphorization, remove cyanogen, go the resin column of COD and deammoniation nitrogen to adsorb, water outlet can reach national up-to-date emission standard, can be back to use plating shop;
G, the resin column of processing in above-mentioned c, d, e, f step is reused after wash-out;
H, the heavy metal eluting is processed respectively to recovery.
2. the processing method of processing electroplating comprehensive waste water as claimed in claim 1, it is characterized in that: described resin column adsorption process all adopts multicolumn series connection alternate run mode, wash-out is carried out in the saturated rear disconnection of front pillar, and rear pillar is proceeded adsorption process, and the resin column after wash-out continues operation as rear pillar.
3. the processing method of processing electroplating comprehensive waste water as claimed in claim 1, is characterized in that: described in remove copper, go the resin column of nickel and de-iron zinc to adopt 4% sulfuric acid to carry out wash-out.
4. the processing method of processing electroplating comprehensive waste water as claimed in claim 1, is characterized in that: described in remove sexavalent chrome, remove trivalent chromium, dephosphorization and go the resin column of cyanogen to adopt 3% sodium hydroxide to carry out wash-out.
5. the processing method of processing electroplating comprehensive waste water as claimed in claim 1, is characterized in that: disacidify, go the resin column of COD and deammoniation nitrogen to adopt 4% hydrochloric acid to carry out wash-out.
6. the processing method of processing electroplating comprehensive waste water as claimed in claim 1, is characterized in that: going calcium magnesium resin model is TM-60, and going sexavalent chrome resin column model is XJ135; Going trivalent chromium resin column model is XJ331, and disacidify resin column model is D547; Going resin of copper model is N931, and going nickel resin column model is N932, and dephosphorization resin column model is J-23; Going COD resin column model is C-15, and deammoniation nitrogen resin column model is T-45.
7. the processing method of processing electroplating comprehensive waste water as claimed in claim 1, is characterized in that: in described step h, adopt extraction process that the heavy metal solution eluting is carried out to extracting and separating.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104163522A (en) * | 2014-08-11 | 2014-11-26 | 郭聪 | Process method for treating chemical nickel-plating wastewater |
| CN104692560A (en) * | 2015-03-03 | 2015-06-10 | 石泰山 | Method for treating phosphorus/phosphine-containing electroplating wastewater |
| CN105000711A (en) * | 2015-07-14 | 2015-10-28 | 深圳市绿沁环保科技有限公司 | Nickel-containing combined electroplating wastewater treatment device and method |
| CN106219658A (en) * | 2016-08-16 | 2016-12-14 | 南昌航空大学 | The classification removal of a kind of heavy metals in industrial wastewater and recovery method |
| CN106517597A (en) * | 2016-12-23 | 2017-03-22 | 广东新大禹环境科技股份有限公司 | Electroplating nickel-containing wastewater treatment system |
| CN106745943A (en) * | 2015-11-24 | 2017-05-31 | 湖南衡阳新澧化工有限公司 | A kind of process for processing electroplating comprehensive waste water |
| CN106745944A (en) * | 2015-11-24 | 2017-05-31 | 湖南衡阳新澧化工有限公司 | A kind of electroplating sewerage processes all-in-one |
| CN107792995A (en) * | 2017-11-07 | 2018-03-13 | 陈鸣岐 | A kind of sewage-treatment plant of efficient galvanization production line |
| CN112010454A (en) * | 2019-05-30 | 2020-12-01 | 上海顺樊环保科技有限公司 | Electroplating nickel-containing wastewater treatment and recovery method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104163522A (en) * | 2014-08-11 | 2014-11-26 | 郭聪 | Process method for treating chemical nickel-plating wastewater |
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| CN107792995A (en) * | 2017-11-07 | 2018-03-13 | 陈鸣岐 | A kind of sewage-treatment plant of efficient galvanization production line |
| CN112010454A (en) * | 2019-05-30 | 2020-12-01 | 上海顺樊环保科技有限公司 | Electroplating nickel-containing wastewater treatment and recovery method |
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Application publication date: 20140730 |