CN105906103A - Recovery process for electroplating wastewater - Google Patents
Recovery process for electroplating wastewater Download PDFInfo
- Publication number
- CN105906103A CN105906103A CN201610410261.XA CN201610410261A CN105906103A CN 105906103 A CN105906103 A CN 105906103A CN 201610410261 A CN201610410261 A CN 201610410261A CN 105906103 A CN105906103 A CN 105906103A
- Authority
- CN
- China
- Prior art keywords
- section
- waste liquid
- recovery process
- electroplating wastewater
- waste liquor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- 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
-
- 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
-
- 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
-
- 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
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to the technical field of electroplating, in particular to a recovery process for electroplating wastewater. The recovery process includes the following steps that the pH value of the electroplating wastewater is adjusted to range from 6 to 7.5 with caustic soda flakes, and then a first section of waste liquor is obtained; the first section of waste liquor stands for 4 hours and then is filtered; solid filtered materials and a second section of waste liquor are obtained; the second section of waste liquor is subjected to resin tower separation, and a third section of waste liquor and reuse water are obtained; strong acid is added into the third section of waste liquor. The recovery process is simple in structure and high in practicality.
Description
Technical field
The present invention relates to electroplating technology field, be specially a kind of electroplating wastewater recovery process.
Background technology
The basic raw material of plating is exactly the heavy metals such as zinc, nickel, copper, chromium and gold, silver, is typical high energy consumption, high pollution
Industry.Due to electroplating principle, these metals are can not to become the coating that we are required completely, wherein have considerable part to become
Pollutant are present in the useless tank liquor of plating and washings, also have partial gasification to become harmful gas, form the heavy metal to environment
Pollute.As a example by copper facing or nickel, its plating average efficiency is less than 40%, say, that the divalent copper of more than 60% or divalent nickel stream
Lose in waste water and mud.
Such as a kind of method for treating copper-containing waste water that Chinese invention patent application number is 201110200963.2, a kind of cupric gives up
Method for treating water, comprises the steps of:
Step one, collection copper-containing wastewater, and regulate the pH value of copper-containing wastewater more than or equal to 8 and less than or equal to 10；Step 2,
In the copper-containing wastewater of step one, add the water-soluble sulfide of excess and stir, removing precipitation, processing at complexation waste water
Pond arranges ORP probe and controls the generating process of reaction, when waste water there is also the complex copper do not reacted completely, instead
Will produce potential difference during Ying, ORP probe will automatically control dosing, until reaction occurs complete, and water-soluble sulfide
Excess 5%～10%；
Step 3, regulating step two the pH value of copper-containing wastewater more than or equal to 3 and less than or equal to 4；
Step 4, in the copper-containing wastewater of step 3, add hydrogen peroxide and ferrous sulfate；
Step 5, regulating step four the pH value of copper-containing wastewater more than or equal to 8 and less than or equal to 10；And
Step 6, removal step five copper-containing wastewater in produce precipitation.
The mode using alkalescence contact break and acid contact break to combine, overcome alkalescence contact break because of copper sulfide precipitation granule tiny
And causing the unfavorable factor of sedimentation effect difference, in the copper-containing wastewater after process, content of copper ion is relatively low, and treatment effect is preferable, but
Being that the yield of copper will greatly reduce, and be unfavorable for sustainable development, the most existing technique is in electroplating wastewater (containing cryanide ion)
Brightener be often difficult to remove, finding the method for brightener in electroplating wastewater of removing is current urgent problem.
Summary of the invention
The deficiency existed for prior art, it is an object of the invention to provide the big electroplating wastewater of a kind of yield and reclaims
Technique.
For achieving the above object, the technical scheme is that a kind of electroplating wastewater recovery process, including following
Step:
A kind of electroplating wastewater recovery process, comprises the following steps:
1) utilize sheet alkali by the pH regulator of electroplating wastewater to 6～7.5, and then obtain first paragraph waste liquid；
2) filter after first paragraph waste liquid being stood 4 hours；
3) the solid filtrate obtained and second segment waste liquid；
4) second segment waste liquid is separated by resin tower, obtain the 3rd section of waste liquid and recycle-water；
5) strong acid is added toward the 3rd section of waste liquid；
Contrast the deficiencies in the prior art, the beneficial effect that the technical scheme that the present invention provides is brought: the 1. solid obtained filters
Thing and second segment waste liquid, the filtered screening of solid is packing after drying, and through detection, solid filtrate contains substantial amounts of hydrogen
Copper oxide, recoverable, reduce cost, beneficially sustainable development.2. second segment waste liquid is separated by resin tower,
To the 3rd section of waste liquid and recycle-water, the 3rd section of waste liquid is Organic substance (brightener), and recycle-water is then directly entered workshop reuse,
Resins exchange is utilized to realize Liquid liquid Separation, it is ensured that without brightener in recycle-water, it is ensured that recycle-water is in the stability of workshop reuse.
3. add strong acid toward the 3rd section of waste liquid, because brightener is alkalescence, react after adding sulphuric acid, and then remove brightener, after reaction
Obtain the 4th section of waste liquid to be mixed in the electroplating effluent in step (1) and again reclaim, it is ensured that brightener may not flow in environment, and right
Environmental pollution.
Detailed description of the invention
By specific embodiment, a kind of electroplating wastewater recovery process of the present invention will be described in detail below.
A kind of electroplating wastewater recovery process, comprises the following steps:
1) utilize sheet alkali by the pH regulator of electroplating wastewater to 6～7.5, and then obtain first paragraph waste liquid；
2) filter after first paragraph waste liquid being stood 4 hours；
3) the solid filtrate obtained and second segment waste liquid, the filtered screening of solid is packed after drying, through detection, Gu
Body filtrate contains substantial amounts of Copper hydrate, recoverable, reduces cost, beneficially sustainable development；
4) being separated by resin tower by second segment waste liquid, obtain the 3rd section of waste liquid and recycle-water, the 3rd section of waste liquid is Organic substance
(brightener), recycle-water is then directly entered workshop reuse, utilizes resins exchange to realize Liquid liquid Separation, it is ensured that not contain in recycle-water
Brightener, it is ensured that recycle-water is in the stability of workshop reuse；
5) add strong acid toward the 3rd section of waste liquid, because brightener is alkalescence, react after adding sulphuric acid, and then remove brightener, instead
Obtain the 4th section of waste liquid after should to be mixed in the electroplating effluent in step (1) and again reclaim, it is ensured that brightener may not flow in environment,
And to environmental pollution.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, those skilled in the art exists
Carry out common variations and alternatives in the range of technical solution of the present invention all should comprise within the scope of the present invention.
Claims (1)
1. an electroplating wastewater recovery process, it is characterised in that comprise the following steps:
1) utilize sheet alkali by the pH regulator of electroplating wastewater to 6～7.5, and then obtain first paragraph waste liquid；
2) filter after first paragraph waste liquid being stood 4 hours；
3) the solid filtrate obtained and second segment waste liquid；
4) second segment waste liquid is separated by resin tower, obtain the 3rd section of waste liquid and recycle-water；
5) strong acid is added toward the 3rd section of waste liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610410261.XA CN105906103A (en) | 2016-06-13 | 2016-06-13 | Recovery process for electroplating wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610410261.XA CN105906103A (en) | 2016-06-13 | 2016-06-13 | Recovery process for electroplating wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105906103A true CN105906103A (en) | 2016-08-31 |
Family
ID=56750188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610410261.XA Pending CN105906103A (en) | 2016-06-13 | 2016-06-13 | Recovery process for electroplating wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105906103A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2404403A1 (en) * | 1973-01-30 | 1974-08-22 | Nippon Soda Co | USE OF DITHIOCARBAMATE COMPOUNDS AS A MEANS OF FIXING HEAVY METALS AND THEIR COMPOUNDS |
| CN103523864A (en) * | 2013-10-29 | 2014-01-22 | 陈伟 | Industrial wastewater treatment method and device |
| CN105565533A (en) * | 2014-10-08 | 2016-05-11 | 深圳市汇利龙科技有限公司 | Zero-discharge on-line treatment process for preparing deionized water from copper sulphate electroplating waste water |
-
2016
- 2016-06-13 CN CN201610410261.XA patent/CN105906103A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2404403A1 (en) * | 1973-01-30 | 1974-08-22 | Nippon Soda Co | USE OF DITHIOCARBAMATE COMPOUNDS AS A MEANS OF FIXING HEAVY METALS AND THEIR COMPOUNDS |
| CN103523864A (en) * | 2013-10-29 | 2014-01-22 | 陈伟 | Industrial wastewater treatment method and device |
| CN105565533A (en) * | 2014-10-08 | 2016-05-11 | 深圳市汇利龙科技有限公司 | Zero-discharge on-line treatment process for preparing deionized water from copper sulphate electroplating waste water |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160831 |