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
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Taking copper or nickel plating as an example, the average efficiency of electroplating is lower than 40

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

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

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

[0021] 1) Adjust the pH of the electroplating wastewater to 6-7.5 by using caustic soda to obtain the first-stage waste liquid;

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

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

[0024] 4) Separate the second-stage waste liquid through the resin tower to obtain the third-stage waste liquid and reuse water. The third-stage waste liquid is organic matter (brightener), and the reused water is directly fed into the workshop for reus...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap