CN106242112A - A kind of process technique of integrative electroplating waste - Google Patents
A kind of process technique of integrative electroplating waste Download PDFInfo
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- CN106242112A CN106242112A CN201610669561.XA CN201610669561A CN106242112A CN 106242112 A CN106242112 A CN 106242112A CN 201610669561 A CN201610669561 A CN 201610669561A CN 106242112 A CN106242112 A CN 106242112A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/18—Cyanides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses the process technique of a kind of integrative electroplating waste, comprise the following steps: step 1: collect various electroplating wastewater；Step 2: remove complex；Step 3: remove chromic acid；Step 4: add alkaline solution, obtain primary sedimentation thing；Step 5: after filtering primary sedimentation thing, obtain the first supernatant；Step 6: remove remaining chromic acid and cyanide；Step 7: again add alkaline solution, obtain secondary precipitate；Step 8: remove secondary precipitate, obtain the second supernatant；Step 9: the second supernatant is carried out aeration；Step 10: readjustment acid-base value.Present invention optimizes process technique, improve purification efficiency, reduce input cost, economize on resources waste, it is achieved the treatment of wastes with processes of wastes against one another, the effect of resource recycling.
Description
Technical field
The present invention relates to a kind of useless water purification technique, particularly to the process technique of a kind of integrative electroplating waste.
Background technology
Electroplating industry is indispensable link in Chinese national economy, relates to the every field such as national defence, industry, life,
The phenomenon that demand is big also result in the excessive development of electroplating industry equally, and electroplating facility is built in a large number.Electroplating facility (or car
Between) waste water discharged and waste liquid, such as plating piece washings, useless tank liquor, component cooling water and the flushing surface water etc..Due to plating relatively
Many, technique is loaded down with trivial details, and its water quality is complicated, and composition is wayward, and electroplating wastewater mainly contains the weights such as chromium, cadmium, nickel, copper, zinc, gold, silver
Metal ion and cyanide etc., these electroplating wastewaters belong to carcinogenic, teratogenesis, mutagenic extremely toxic substance, to the mankind and other lifes
The living environment of thing all causes harm greatly, and therefore, the purified treatment of electroplating wastewater is extremely urgent.
In prior art, electroplating wastewater mainly has two classes: the first kind is electroplating wastewater of chromium, the chromium in this electroplating wastewater
Ion concentration is higher；Equations of The Second Kind is cyanide-containing electroplating water, and the cyanide ion concentration in such electroplating wastewater is higher.At present, generally
Use chemical precipitation method that electroplating wastewater is made purified treatment, the most first by electroplating wastewater classification shunting, then chemical agent is added extremely
In different types of electroplating wastewater, the heavy metal ion in dissolved state is made in water to be changed into water-fast heavy metal chemical combination
Thing, the method being then removed by precipitation, there is following defect in the method technique:
One, complex process, not only needs during pretreatment to process classification of waste shunting, and right in follow-up processing procedure
The requirement of technological parameter and process environments is higher, generally requires and supernatant is carried out microwave treatment, makes technique more complicated undoubtedly
Change, too increase many costs；
Two, purification efficiency is the highest, and clean-up effect is the best, it is difficult to reach the discharge standard of country's electroplating wastewater, if processing not
When, environment is easily caused secondary pollution by the heavy metal in mud.
Three, input cost is high, needs more treatment process steps and processing means, and needs in processing procedure
Expending great chemical agent, the heavy metal in waste water is easily wasted, process technique up to now cannot realize turning waste into wealth,
Resource regeneration and the effect effectively utilized；
In view of this, the present inventor's specialized designs process technique of a kind of integrative electroplating waste, this case thus produces.
Summary of the invention
It is an object of the invention to provide the process technique of a kind of integrative electroplating waste, process technique with optimization, improve clean
Changing efficiency, reduce processing cost, economize on resources waste, and realizes the treatment of wastes with processes of wastes against one another, the effect of resource recycling.
To achieve these goals, the technical solution used in the present invention is as follows:
The process technique of a kind of integrative electroplating waste, comprises the following steps:
Step 1: collect electroplating wastewater of chromium, cyanide-containing electroplating water, pretreatment liquid, burnt copper waste water and general electroplating wastewater；
Step 2: electroplating wastewater of chromium is directed respectively in pretreatment liquid and burnt copper waste water, by electroplating wastewater of chromium
Chromic acid aoxidizes the complex in pretreatment liquid and burnt copper waste water respectively, more reacted waste water is directed respectively into general electroplating wastewater
In, and mix in comprehensive wastewater pond；
Step 3: after complex is fully abolished, imports cyanide-containing electroplating water in comprehensive wastewater pond and mixes, obtain
Integrative electroplating waste, relends the cyanide reduction remaining chromic acid of electroplating wastewater of chromium helped in cyanide-containing electroplating water；
Step 4: add alkaline solution in integrative electroplating waste, the pH value of integrative electroplating waste is adjusted to 7, obtains once
Precipitate；
Step 5: after filtering the primary sedimentation thing in above-mentioned steps 4, obtain the first supernatant；
Step 6: add ferrous salt solution and hydrogen peroxide in the first supernatant, with react respectively the remaining chromic acid of removal and
Cyanide；
Step 7: again add alkaline solution, is adjusted to 9-10 by the pH value of the first supernatant, obtains secondary precipitate；
Step 8: after removing the secondary precipitate in above-mentioned steps 7, obtain the second supernatant；
Step 9: the second supernatant is carried out aeration, continues aeration two hours, and the pH value of the second supernatant controls at 10-
11；
Step 10: readjustment acid-base value, makes the pH value of the second supernatant be adjusted to 7-8, makes final electroplating wastewater reach discharge
Standard.
In described step 2, cyanide and chromic acid reaction generate hydrocyanic acid, remove hydrocyanic acid by sodium hypochlorite.
In described step 2, sodium hypochlorite quickly removes hydrocyanic acid in the way of spray.
In described step 4, alkaline solution is Calx or sodium hydroxide.
In described step 7, alkaline solution is Calx or sodium hydroxide.
In described step 3, if the cyanide in cyanide-containing electroplating water is not enough, give up by pyrosulfurous acid sodium reduction chromium containing electroplating
The chromic acid of water, obtains the two reacted precipitate.
After using such scheme, the invention has the beneficial effects as follows:
One, present invention optimizes the process technique of electroplating wastewater, both without needing when pretreatment classification of waste is shunted
Process, without the technological parameter excessively considered in subsequent processes and process environments, replace traditional microwave processes,
Step is less, and technique is simple, remarkably productive；
Two, the present invention improves purification efficiency, strengthens clean-up effect, has reached the discharge standard of national electroplating wastewater,
Reduce the secondary pollution to environment；
Three, the present invention greatly reduces input cost, not only without more treatment process steps and processing means, also without
Microwave processes need to be used, and without expending too much chemical agent in processing procedure, with electroplating wastewater as technique
In raw material, turn waste into wealth, both protected environment, saved again resource, there is obvious economy and social environment benefit, be
Cleaning production, environmental conservation and the great innovation of utilization of resources technology.
Below in conjunction with detailed description of the invention, the present invention will be further described.
Detailed description of the invention
The process technique of a kind of integrative electroplating waste that the present invention discloses, comprises the following steps:
Step 1: collect electroplating wastewater of chromium, cyanide-containing electroplating water, pretreatment liquid and burnt copper waste water and general electroplating wastewater；
Step 2: electroplating wastewater of chromium is directed respectively in pretreatment liquid and burnt copper waste water, by electroplating wastewater of chromium
Chromic acid aoxidizes the complex in pretreatment liquid and burnt copper waste water respectively, more reacted waste water is directed respectively into general electroplating wastewater
In, and mix in comprehensive wastewater pond；
Step 3: after complex is fully abolished, imports cyanide-containing electroplating water in comprehensive wastewater pond and mixes, obtain
Integrative electroplating waste, relends the cyanide reduction remaining chromic acid of electroplating wastewater of chromium helped in cyanide-containing electroplating water；
Step 4: add alkaline solution in integrative electroplating waste, the pH value of integrative electroplating waste is adjusted to 7, obtains once
Precipitate；
Step 5: after filtering the primary sedimentation thing in above-mentioned steps 4, obtain the first supernatant；
Step 6: add ferrous salt solution and hydrogen peroxide in the first supernatant, with react respectively the remaining chromic acid of removal and
Cyanide；
Step 7: again add alkaline solution, is adjusted to 9-10 by the pH value of the first supernatant, obtains secondary precipitate；
Step 8: after removing the secondary precipitate in above-mentioned steps 7, obtain the second supernatant；
Step 9: the second supernatant is carried out aeration, continues aeration two hours, and the pH value of the second supernatant controls at 10-
11；
Step 10: readjustment acid-base value, makes the pH value of the second supernatant be adjusted to 7-8, makes final electroplating wastewater reach discharge
Standard.
In step 2 above, cyanide and chromic acid reaction generate hydrocyanic acid, remove hydrocyanic acid by sodium hypochlorite, to rise
To more environmentally-friendly effect.Wherein, sodium hypochlorite removes the mode of hydrocyanic acid to be had multiple, can be specifically that sodium hypochlorite is with spray
Mode quickly remove hydrocyanic acid, to play the purpose more quickly removing hydrocyanic acid.
Further, in described step 4, alkaline solution is Calx or sodium hydroxide.
Further, in described step 7, alkaline solution is Calx or sodium hydroxide.
In the present embodiment.In described step 3, if the cyanide in cyanide-containing electroplating water is not enough, by sodium pyrosulfite
The chromic acid of reduction electroplating wastewater of chromium, obtains the two reacted precipitate, fully to remove the chromic acid of electroplating wastewater of chromium, order
Clean-up effect is more preferably.
The invention has the beneficial effects as follows:
One, present invention optimizes the process technique of electroplating wastewater, both without needing when pretreatment classification of waste is shunted
Process, without the technological parameter excessively considered in subsequent processes and process environments, replace traditional microwave processes,
Step is less, and technique is simple, remarkably productive；
Two, the present invention improves purification efficiency, strengthens clean-up effect, has reached the discharge standard of national electroplating wastewater,
Reduce the secondary pollution to environment；
Three, the present invention greatly reduces input cost, not only without more treatment process steps and processing means, also without
Microwave processes need to be used, and without expending too much chemical agent in processing procedure, with electroplating wastewater as technique
In raw material, turn waste into wealth, both protected environment, saved again resource, there is obvious economy and social environment benefit, be
Cleaning production, environmental conservation and the great innovation of utilization of resources technology.
Processing electroplating wastewater by the way, it is analyzed according to the monitoring of table 1 and is monitored knot accordingly according to method
Really, table 2 is referred to.
Table 1 monitoring is analyzed according to method
Table 2 monitoring result report
Above-described embodiment the product form of the non-limiting present invention and style, the ordinary skill people of any art
Member is suitably changed what it did or modifies, and all should be regarded as the patent category without departing from the present invention.
Claims (6)
1. the process technique of an integrative electroplating waste, it is characterised in that comprise the following steps:
Step 1: collect electroplating wastewater of chromium, cyanide-containing electroplating water, pretreatment liquid, burnt copper waste water and general electroplating wastewater；
Step 2: electroplating wastewater of chromium is directed respectively in pretreatment liquid and burnt copper waste water, by the chromic acid in electroplating wastewater of chromium
Oxidation pretreatment liquid and the complex in burnt copper waste water respectively, more reacted waste water is directed respectively in general electroplating wastewater,
And mix in comprehensive wastewater pond；
Step 3: after complex is fully abolished, imports cyanide-containing electroplating water in comprehensive wastewater pond and mixes, and obtains comprehensive
Electroplating wastewater, relends the cyanide reduction remaining chromic acid of electroplating wastewater of chromium helped in cyanide-containing electroplating water；
Step 4: add alkaline solution in integrative electroplating waste, the pH value of integrative electroplating waste is adjusted to 7, obtains primary sedimentation
Thing；
Step 5: after filtering the primary sedimentation thing in above-mentioned steps 4, obtain the first supernatant；
Step 6: add ferrous salt solution and hydrogen peroxide in the first supernatant, to react the remaining chromic acid of removal and cyaniding respectively
Thing；
Step 7: again add alkaline solution, is adjusted to 9-10 by the pH value of the first supernatant, obtains secondary precipitate；
Step 8: after removing the secondary precipitate in above-mentioned steps 7, obtain the second supernatant；
Step 9: the second supernatant is carried out aeration, continues aeration two hours, and the pH value of the second supernatant controls at 10-11；
Step 10: readjustment acid-base value, makes the pH value of the second supernatant be adjusted to 7-8, makes final electroplating wastewater reach discharge standard.
The process technique of a kind of integrative electroplating waste the most according to claim 1, it is characterised in that: in described step 2, cyanogen
Compound and chromic acid reaction generate hydrocyanic acid, remove hydrocyanic acid by sodium hypochlorite.
The process technique of a kind of integrative electroplating waste the most according to claim 2, it is characterised in that: in described step 2, secondary
Sodium chlorate quickly removes hydrocyanic acid in the way of spray.
The process technique of a kind of integrative electroplating waste the most according to claim 1, it is characterised in that: in described step 4, alkali
Property solution is Calx or sodium hydroxide.
The process technique of a kind of integrative electroplating waste the most according to claim 1, it is characterised in that: in described step 7, alkali
Property solution is Calx or sodium hydroxide.
The process technique of a kind of integrative electroplating waste the most according to claim 1, it is characterised in that: in described step 3, if
Cyanide in cyanide-containing electroplating water is not enough, by the chromic acid of pyrosulfurous acid sodium reduction electroplating wastewater of chromium, obtains the two reaction
After precipitate.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111170530A (en) * | 2018-11-13 | 2020-05-19 | 上海朗蔚环保科技有限公司 | Electroplating wastewater treatment system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105384287A (en) * | 2015-11-09 | 2016-03-09 | 厦门市同利源电气设备有限公司 | Treatment technology for electroplating wastewater |
| CN105523663A (en) * | 2015-12-23 | 2016-04-27 | 厦门市同利源电气设备有限公司 | Processing technology of electroplating wastewater |
| CN105585186A (en) * | 2015-12-23 | 2016-05-18 | 厦门市同利源电气设备有限公司 | Breaking process for electroplating wastewater complex |
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- 2016-08-15 CN CN201610669561.XA patent/CN106242112A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105384287A (en) * | 2015-11-09 | 2016-03-09 | 厦门市同利源电气设备有限公司 | Treatment technology for electroplating wastewater |
| CN105523663A (en) * | 2015-12-23 | 2016-04-27 | 厦门市同利源电气设备有限公司 | Processing technology of electroplating wastewater |
| CN105585186A (en) * | 2015-12-23 | 2016-05-18 | 厦门市同利源电气设备有限公司 | Breaking process for electroplating wastewater complex |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111170530A (en) * | 2018-11-13 | 2020-05-19 | 上海朗蔚环保科技有限公司 | Electroplating wastewater treatment system |
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Application publication date: 20161221 |