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Recovery process for electroplating wastewater

A technology of electroplating wastewater and process, applied in the fields of metallurgical wastewater treatment, water pollutants, water/sewage treatment, etc., can solve the problems of lost wastewater and sludge, low average electroplating efficiency, etc., to ensure stability and be conducive to sustainable The effect of development and cost reduction

Inactive Publication Date: 2016-08-31
TAIZHOU SHENZHOU ELECTRIC HEATING & ELECTRICAL APPLIANCE FACTORY
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AI Technical Summary

Problems solved by technology

Taking copper or nickel plating as an example, the average efficiency of electroplating is lower than 40%, which means that more than 60% of divalent copper or divalent nickel is lost in wastewater and sludge

Method used

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Examples

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Embodiment Construction

[0019] The electroplating wastewater recovery process of the present invention will be described in detail below through specific examples.

[0020] A process for recycling electroplating wastewater, comprising the following steps:

[0021] 1) Using caustic soda to adjust the pH of the electroplating wastewater to 6-7.5, and then obtain the first waste liquid;

[0022] 2) Filter the first section of waste liquid after standing for 4 hours;

[0023] 3) The obtained solid filtrate and the second-stage waste liquid, the solid filtrate is packaged after drying, and after testing, the solid filtrate contains a large amount of copper hydroxide, which can be recycled, reduces the cost, and is conducive to sustainable development;

[0024] 4) Separating the second stage of waste liquid through the resin tower to obtain the third stage of waste liquid and reused water. The third stage of waste liquid is organic matter (brightener), while the recycled water is directly sent to the work...

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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 [0001] The invention relates to the technical field of electroplating, in particular to a process for recycling electroplating wastewater. Background technique [0002] The basic raw materials of electroplating are zinc, nickel, copper, chromium, gold, silver and other heavy metals, which is a typical high energy consumption and high pollution industry. Due to the principle of electroplating, these metals cannot completely become the coating we need, and a considerable part of them will become pollutants in the electroplating waste bath and rinsing water, and some of them will be vaporized into harmful gases, forming heavy metal pollution to the environment . Taking copper or nickel plating as an example, the average efficiency of electroplating is lower than 40%, which means that more than 60% of divalent copper or divalent nickel is lost in wastewater and sludge. [0003] For example, the Chinese invention patent application number is 201110200963.2, a me...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/20C02F103/16
CPCC02F1/42C02F1/52C02F1/58C02F1/66C02F9/00C02F2101/20C02F2103/16
Inventor 陈振法
Owner TAIZHOU SHENZHOU ELECTRIC HEATING & ELECTRICAL APPLIANCE FACTORY
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