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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- 239000002351 wastewater Substances 0.000 title claims abstract description 73
- 238000009713 electroplating Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000011347 resin Substances 0.000 claims abstract description 79
- 229920005989 resin Polymers 0.000 claims abstract description 79
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052802 copper Inorganic materials 0.000 claims abstract description 12
- 239000010949 copper Substances 0.000 claims abstract description 12
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 9
- 239000006228 supernatant Substances 0.000 claims abstract description 9
- 239000006004 Quartz sand Substances 0.000 claims abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000001471 micro-filtration Methods 0.000 claims abstract description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 239000011651 chromium Substances 0.000 claims description 16
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 claims description 16
- 229910052804 chromium Inorganic materials 0.000 claims description 14
- 238000003672 processing method Methods 0.000 claims description 14
- 239000010802 sludge Substances 0.000 claims description 13
- 239000004519 grease Substances 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 238000007747 plating Methods 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims description 3
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 230000000274 adsorptive effect Effects 0.000 claims description 3
- 229910001424 calcium ion Inorganic materials 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000011282 treatment Methods 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052737 gold Inorganic materials 0.000 abstract description 2
- 239000010931 gold Substances 0.000 abstract description 2
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 abstract 2
- 238000009776 industrial production Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- -1 sliver Chemical compound 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000011284 combination treatment Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Water Treatment By Sorption (AREA)
- Treatment Of Water By Ion Exchange (AREA)
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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| CN104163522A (en) * | 2014-08-11 | 2014-11-26 | 郭聪 | Process method for treating chemical nickel-plating wastewater |
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| 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 |
| 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 |