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Electroplating wastewater treatment reclaiming technique

A technology of electroplating wastewater and process, which is applied in the direction of metallurgical wastewater treatment, adsorption water/sewage treatment, neutralization water/sewage treatment, etc. It can solve the problem that the water quality and quantity cannot meet the needs of production, the treatment process is different, and it is difficult to reuse, etc. problems, to achieve the effects of small footprint, lower production costs, and convenient management

Active Publication Date: 2007-09-26
JINAN JINGHENG ELECTRONICS
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Problems solved by technology

[0003] Due to the complex water quality, electroplating wastewater treatment adopts different treatment processes. Even if the treatment of electroplating wastewater reaches the national sewage treatment standard, most of it will be discharged and it is difficult to reuse it.
There are also some processes such as sedimentation, filtration, adsorption, pH adjustment, ion exchange and other processes for simple treatment and reuse of wastewater, but the water quality and quantity are difficult to meet the needs of production

Method used

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  • Electroplating wastewater treatment reclaiming technique

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Embodiment 1

[0041] As shown in Fig. 1, it is a kind of electroplating waste water treatment reuse process of the present invention, adopts following process steps successively:

[0042] 1) Harmless treatment:

[0043] a. Wastewater containing cyanide 10m 3 After passing through the cyanide-containing wastewater regulating pool A, adjust the water quality and quantity, enter the reaction tank B, add sodium hydroxide with a concentration of 10%, the flow rate is 10-17L / H (liter / hour), adjust the pH to 10-11, and then add sodium hypochlorite After oxidation, enter reaction tank B, add hydrochloric acid with a concentration of 10%, flow rate is 4.5-6L / H (liter / hour), adjust pH 8-8.5, add sodium hypochlorite to carry out secondary redox treatment;

[0044] b. After two-stage oxidation treatment, the wastewater or tin-containing wastewater enters the tin-containing wastewater regulating tank D, and enters the heavy metal reaction tank F after homogenizing and equalizing, adding sodium hydroxid...

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Abstract

The invention discloses a reclaimed craft to dispose electroplating waste water, which comprises the following steps: adopting oxidation-reduction and chemical precipitation disposing method and film technology (fold filtration, hyperfiltration, Na filtration and reverse osmosis desalination) deep purifying method; avoiding accumulation of salt effectively; reverse osmosis sloughing monovalent salt at last grade; trapping bivalent salt in innocent treatment system; proceeding depositing treatment continually; removing accumulating BOD and COD in water body through biochemical treatment effectively; realizing zero discharge of waste water.

Description

(1) Technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an electroplating wastewater treatment and reuse process for advanced treatment of electroplating wastewater. (2) Background technology [0002] In the electroplating industry, there are many types of electroplating wastewater and high toxicity. It belongs to the national first-class hazardous waste. If it is discharged without treatment, it will cause great damage to the ecological environment. [0003] Due to the complex water quality, electroplating wastewater treatment adopts different treatment processes. Even if the treatment of electroplating wastewater reaches the national sewage treatment standard, most of it will be discharged and it is difficult to reuse it. There are also some processes such as sedimentation, filtration, adsorption, pH adjustment, ion exchange and other processes to simply treat and reuse wastewater, but the water quality and quantity are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/76C02F1/52C02F1/66C02F3/02C02F1/28C02F103/16
CPCY02A20/131Y02W10/10
Inventor 刘进松马西华吴志杰
Owner JINAN JINGHENG ELECTRONICS
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