CN105523663A - Processing technology of electroplating wastewater - Google Patents
Processing technology of electroplating wastewater Download PDFInfo
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- CN105523663A CN105523663A CN201510979635.5A CN201510979635A CN105523663A CN 105523663 A CN105523663 A CN 105523663A CN 201510979635 A CN201510979635 A CN 201510979635A CN 105523663 A CN105523663 A CN 105523663A
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- electroplating wastewater
- electroplating
- cyanide
- chromium
- wastewater
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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
- C02F1/66—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
- 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
- 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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
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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)
- Water Treatment By Electricity Or Magnetism (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a processing technology of electroplating wastewater; the processing technology comprises the following steps: step 1, collecting chromium-containing electroplating wastewater and cyanide-containing electroplating wastewater; step 2, reducing chromic acid in the chromium-containing electroplating wastewater by virtue of cyanide in the cyanide-containing electroplating wastewater, to obtain comprehensive electroplating wastewater; step 3, adding an alkaline solution into the comprehensive electroplating wastewater, and adjusting the pH value of the comprehensive electroplating wastewater to 7-8, to obtain a primary precipitate; step 4, filtering the primary precipitate to obtain a supernatant; step 5, adding a ferrous salt solution and hydrogen peroxide into the supernatant, and respectively carrying out reaction to remove the remaining chromic acid and cyanide; step 6, adding the alkaline solution again, and adjusting the pH value of the supernatant to 9-10, to obtain a secondary precipitate; and step 7, removing the secondary precipitate. The processing technology is optimized, the purification efficiency is improved, the investment cost is reduced, the resource waste is saved, and the effects of treatment of wastes with wastes and resource utilization are realized.
Description
Technical field
The present invention relates to a kind of purification process of waste water, particularly a kind for the treatment of process of electroplating wastewater.
Background technology
Electroplating industry is indispensable link in Chinese national economy, and relate to the every field such as national defence, industry, life, the phenomenon that demand is large also result in the overdevelopment of electroplating industry equally, and electroplating facility is built in a large number.The waste water and waste liquids that electroplating facility (or workshop) is discharged, as plating piece rinse water, useless tank liquor, component cooling water and the flushing surface water etc.Because plating is more, technique is loaded down with trivial details, its water quality is complicated, composition is wayward, electroplating wastewater is mainly containing heavy metal ion and prussiates etc. such as chromium, cadmium, nickel, copper, zinc, gold and silver, and these electroplating wastewaters belong to carcinogenic, teratogenesis, mutagenic highly toxic substance, all cause great harm to the living environment of the mankind and other biological, therefore, the purifying treatment of electroplating wastewater is extremely urgent.
In prior art, electroplating wastewater mainly contains two classes: the first kind is electroplating wastewater of chromium, and the chromium ion concentration in this electroplating wastewater 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, usual employing chemical precipitation method makes purifying treatment to electroplating wastewater, namely first by electroplating wastewater classification shunting, again chemical agent is added in dissimilar electroplating wastewater, the heavy metal ion in dissolved state in water is made to change water-fast heavy metal compound into, then being carried out the method removed by precipitation, there is following defect in the method technique:
One, complex process, not only needs during pre-treatment classification of waste shunting process, and higher to the requirement of processing parameter and process environments in follow-up treating processes;
Two, purification efficiency is not high, and decontamination effect improving is not good, is difficult to the emission standard reaching national electroplating wastewater, if deal with improperly, the heavy metal in mud easily causes secondary pollution to environment.
Three, input cost is high, need more treatment process steps and treatment unit, and need to expend great chemical agent in treating processes, the heavy metal in waste water is easily wasted, treatment process up to now cannot realize turning waste into wealth, resource recovery and the effect that effectively utilizes;
In view of this, a kind for the treatment of process of electroplating wastewater of the present inventor's specialized designs, this case produces thus.
Summary of the invention
The object of the present invention is to provide a kind for the treatment of process of electroplating wastewater, with optimization process technique, improve purification efficiency, reduce input cost, economize on resources waste, and realize the treatment of wastes with processes of wastes against one another, the effect of resource utilization recycling.
To achieve these goals, the technical solution used in the present invention is as follows:
A treatment process for electroplating wastewater, comprises the following steps:
Step 1: collect electroplating wastewater of chromium and cyanide-containing electroplating water;
Step 2: import cyanide-containing electroplating water in electroplating wastewater of chromium, by the chromic acid in the prussiate reduction electroplating wastewater of chromium in cyanide-containing electroplating water, obtains integrative electroplating waste;
Step 3: add basic solution in integrative electroplating waste, is adjusted to 7-8 by the pH value of integrative electroplating waste, obtains primary sedimentation thing;
Step 4: after filtering the primary sedimentation thing in above-mentioned steps 3, obtain supernatant liquor;
Step 5: add ferrous salt solution and hydrogen peroxide in supernatant liquor, removes remaining chromic acid and prussiate to react respectively;
Step 6: again add basic solution, is adjusted to 9-10 by the pH value of supernatant liquor, obtains secondary precipitate;
Step 7: remove secondary precipitate, make final electroplating wastewater reach emission standard.
In described step 2, prussiate and chromic acid reaction generate prussic acid, remove prussic acid by clorox.
In described step 2, clorox removes prussic acid fast in the mode of spray.
After adopting such scheme, the invention has the beneficial effects as follows:
One, present invention optimizes the treatment process of electroplating wastewater, both without the need to needing when pre-treatment classification of waste shunting process, also without the need to too considering processing parameter in subsequent processes and process environments, step was less, and technique is simple;
Two, invention increases purification efficiency, strengthen decontamination effect improving, reach the emission standard of national electroplating wastewater, reduce the secondary pollution to environment;
Three, the present invention greatly reduces input cost; not only without the need to more treatment process steps and treatment unit; and without the need to expending too much chemical agent in treating processes; with electroplating wastewater as the starting material in technique; turn waste into wealth, both protected environment, again save resource; having obvious economy and social environment benefit, is the great innovation of cleaner production, environment protection and utilization of resources technology.
Below in conjunction with embodiment, the present invention will be further described.
Embodiment
The treatment process of a kind of electroplating wastewater that the present invention discloses, comprises the following steps:
Step 1: collect electroplating wastewater of chromium and cyanide-containing electroplating water;
Step 2: import cyanide-containing electroplating water in electroplating wastewater of chromium, by the chromic acid in the prussiate reduction electroplating wastewater of chromium in cyanide-containing electroplating water, obtains integrative electroplating waste;
Step 3: add basic solution in integrative electroplating waste, is adjusted to 7-8 by the pH value of integrative electroplating waste, obtains primary sedimentation thing;
Step 4: after filtering the primary sedimentation thing in above-mentioned steps 3, obtain supernatant liquor;
Step 5: add ferrous salt solution and hydrogen peroxide in supernatant liquor, removes remaining chromic acid and prussiate to react respectively;
Step 6: again add basic solution, is adjusted to 9-10 by the pH value of supernatant liquor, obtains secondary precipitate;
Step 7: remove secondary precipitate, make final electroplating wastewater reach emission standard.
In step 2, prussiate and chromic acid reaction generate prussic acid, prussic acid is removed to make the environmental protection more of this technique by clorox, wherein, the mode that clorox removes prussic acid has multiple, can be specifically that clorox removes prussic acid in the mode of spray, play the object removing prussic acid fast.
The invention has the beneficial effects as follows:
One, present invention optimizes the treatment process of electroplating wastewater, both without the need to needing when pre-treatment classification of waste shunting, also without the need to too considering processing parameter in subsequent processes and process environments, step was less, and technique is simple;
Two, invention increases purification efficiency, strengthen decontamination effect improving, reach the emission standard of national electroplating wastewater, reduce the secondary pollution to environment;
Three, the present invention greatly reduces input cost; not only without the need to more treatment process steps and treatment unit; and without the need to expending too much chemical agent in treating processes; with electroplating wastewater as the starting material in technique; turn waste into wealth, both protected environment, again save resource; having obvious economy and social environment benefit, is the great innovation of cleaner production, environment protection and utilization of resources technology.
Process electroplating wastewater by the way, it obtains corresponding monitoring result according to the monitoring analysis foundation method of table 1, refers to table 2.
Table 1 monitoring analysis foundation method
Table 2 monitoring result report
Above-described embodiment non-limiting product form of the present invention and style, any person of an ordinary skill in the technical field, to its suitable change done or modification, all should be considered as not departing from patent category of the present invention.
Claims (3)
1. a treatment process for electroplating wastewater, is characterized in that, comprises the following steps:
Step 1: collect electroplating wastewater of chromium and cyanide-containing electroplating water;
Step 2: import cyanide-containing electroplating water in electroplating wastewater of chromium, by the chromic acid in the prussiate reduction electroplating wastewater of chromium in cyanide-containing electroplating water, obtains integrative electroplating waste;
Step 3: add basic solution in integrative electroplating waste, is adjusted to 7-8 by the pH value of integrative electroplating waste, obtains primary sedimentation thing;
Step 4: after filtering the primary sedimentation thing in above-mentioned steps 3, obtain supernatant liquor;
Step 5: add ferrous salt solution and hydrogen peroxide in supernatant liquor, removes remaining chromic acid and prussiate to react respectively;
Step 6: again add basic solution, is adjusted to 9-10 by the pH value of supernatant liquor, obtains secondary precipitate;
Step 7: remove secondary precipitate, make final electroplating wastewater reach emission standard.
2. the treatment process of a kind of electroplating wastewater according to claim 1, is characterized in that: in described step 2, and prussiate and chromic acid reaction generate prussic acid, remove prussic acid by clorox.
3. the treatment process of a kind of electroplating wastewater according to claim 2, is characterized in that: in described step 2, and clorox removes prussic acid fast in the mode of spray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510979635.5A CN105523663B (en) | 2015-12-23 | 2015-12-23 | A kind for the treatment of process of electroplating wastewater |
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| CN201510979635.5A CN105523663B (en) | 2015-12-23 | 2015-12-23 | A kind for the treatment of process of electroplating wastewater |
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| CN105523663A true CN105523663A (en) | 2016-04-27 |
| CN105523663B CN105523663B (en) | 2018-08-24 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105948336A (en) * | 2016-07-04 | 2016-09-21 | 北方工程设计研究院有限公司 | Treatment process of electroplating wastewater containing cyanogen and chromium |
| CN106242112A (en) * | 2016-08-15 | 2016-12-21 | 厦门市同利源电气设备有限公司 | A kind of process technique of integrative electroplating waste |
| CN108264163A (en) * | 2018-01-12 | 2018-07-10 | 厦门市同利源电气设备有限公司 | A kind for the treatment of process of electroplating wastewater |
| CN108793508A (en) * | 2018-07-15 | 2018-11-13 | 长春黄金研究院有限公司 | A kind of cooperative processing method of high concentration cyanide waste water from dyestuff and condensation waste water |
| CN109553215A (en) * | 2018-11-19 | 2019-04-02 | 浙江海洋大学 | A kind of processing method of electroplating wastewater |
| CN110482734A (en) * | 2018-05-15 | 2019-11-22 | 江苏大彭环保科技有限公司 | Return water treatment process in a kind of electroplating wastewater |
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| CN103864238A (en) * | 2012-12-13 | 2014-06-18 | 胡波 | Electroplating wastewater treatment method |
| CN203904113U (en) * | 2014-06-19 | 2014-10-29 | 苏州市环境保护有限公司 | Classified treatment equipment for sewage |
| CN104326599A (en) * | 2014-10-25 | 2015-02-04 | 吴长江 | Treatment method and treatment device of cyanogen-containing chromium-containing electroplating wastewater |
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2015
- 2015-12-23 CN CN201510979635.5A patent/CN105523663B/en active Active
Patent Citations (4)
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| UA67084C2 (en) * | 2003-07-08 | 2007-07-10 | Закрите Акціонерне Товариство "Сєвєродонецьке Об'Єднання Азот" | Method for purification of waste water |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105948336A (en) * | 2016-07-04 | 2016-09-21 | 北方工程设计研究院有限公司 | Treatment process of electroplating wastewater containing cyanogen and chromium |
| CN105948336B (en) * | 2016-07-04 | 2018-12-18 | 北方工程设计研究院有限公司 | A kind for the treatment of process of electroplating wastewater containing cyanogens and chrome |
| CN106242112A (en) * | 2016-08-15 | 2016-12-21 | 厦门市同利源电气设备有限公司 | A kind of process technique of integrative electroplating waste |
| CN108264163A (en) * | 2018-01-12 | 2018-07-10 | 厦门市同利源电气设备有限公司 | A kind for the treatment of process of electroplating wastewater |
| CN108264163B (en) * | 2018-01-12 | 2020-09-11 | 厦门市同利源电气设备有限公司 | Treatment process of electroplating wastewater |
| CN110482734A (en) * | 2018-05-15 | 2019-11-22 | 江苏大彭环保科技有限公司 | Return water treatment process in a kind of electroplating wastewater |
| CN108793508A (en) * | 2018-07-15 | 2018-11-13 | 长春黄金研究院有限公司 | A kind of cooperative processing method of high concentration cyanide waste water from dyestuff and condensation waste water |
| CN109553215A (en) * | 2018-11-19 | 2019-04-02 | 浙江海洋大学 | A kind of processing method of electroplating wastewater |
| CN109553215B (en) * | 2018-11-19 | 2021-11-09 | 浙江海洋大学 | Method for treating electroplating wastewater |
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| CN105523663B (en) | 2018-08-24 |
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