Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Electroplating wastewater electrochemical treatment and recycling comprehensive method

A technology of electroplating wastewater and comprehensive methods, which is applied in the direction of metallurgical wastewater treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the problems of failing to meet the discharge standards of electroplating pollutants, and achieve saving land occupation and less chemical dosage , cost reduction effect

Inactive Publication Date: 2014-01-08
广西丽桂环保科技有限公司
View PDF6 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome that the existing conventional methods cannot reach the national "Electroplating Pollutant Discharge Standard-GB21900-2008

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electroplating wastewater electrochemical treatment and recycling comprehensive method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The YHD special flocculant used in this example is alum; the neutralizing agent is a mixture of sodium carbonate and sodium sulfate according to the mass ratio = 1:1; the physicochemical agent is a mixture of sodium hypochlorite and sodium pyrosulfite according to the mass ratio = 1:1. The electroplating wastewater is the mixed wastewater of pre-treatment wastewater, cyanide-containing wastewater, chromium-containing wastewater, comprehensive wastewater and mixed wastewater of a large electroplating factory in Guangxi.

[0037] (a) Wastewater mixed treatment: The electroplating wastewater is collected and collected, and then enters the liquid collection pool through the grid machine to obtain the mixed wastewater raw water.

[0038] (b) Grit and slag removal: collect the mixed wastewater raw water obtained in step a), and carry out flocculation reaction for 0.8h with the wastewater and YHD special flocculant according to the ratio of 1T (ton): 50g, remove the grit, f...

Embodiment 2

[0045] The YHD special flocculant used in this example is a mixture of ferric chloride and ferric sulfate according to the mass ratio = 1:1; the neutralizer is sodium hydroxide; the physicochemical agent is sodium sulfate and manganese sulfate according to the mass ratio = 1 :1 mixture. The electroplating wastewater is the mixed wastewater of cyanide-containing wastewater, chromium-containing wastewater and comprehensive wastewater of a large-scale electroplating industrial park sewage treatment plant in Zhongshan City, Guangdong Province.

[0046] (a) Wastewater mixed treatment: The electroplating wastewater is collected and collected, and then enters the liquid collection pool through the grid machine to obtain the mixed wastewater raw water.

[0047] (b) Grit and slag removal: collect the mixed wastewater raw water obtained in step a), and carry out flocculation reaction for 1.0h with the wastewater and YHD special flocculant according to the ratio of 1T:35g, remove the gri...

Embodiment 3

[0054] The YHD special flocculant used in this example is a mixture of alum and polyaluminum chloride according to the mass ratio = 1:1; the neutralizer is potassium hydroxide; the physicochemical agent is sodium hypochlorite and manganese sulfate according to the mass ratio = 1:1 mixture. The electroplating wastewater is the mixed wastewater of pre-treatment wastewater, cyanide-containing wastewater, chromium-containing wastewater, comprehensive wastewater and mixed wastewater of a large-scale electroplating industrial park sewage treatment plant in Zhongshan City, Guangdong Province.

[0055] (a) Wastewater mixed treatment: The electroplating wastewater is collected and collected, and then enters the liquid collection pool through the grid machine to obtain the mixed wastewater raw water.

[0056] (b) Grit and slag removal: collect the mixed wastewater raw water obtained in step a), and carry out flocculation reaction with YHD special flocculant according to the ratio of 1T:...

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 an electroplating wastewater electrochemical treatment and recycling comprehensive method. The electroplating wastewater electrochemical treatment and recycling comprehensive method comprises the main process steps of performing convergence and centralized mixing on electroplating wastewater, performing sand settling and slag removal to remove settled sand and waste slag in sewage, enabling the electroplating wastewater to enter a buffer regulation tank of a pretreatment unit, and regulating and neutralizing the pH value of the sewage; further enabling the electroplating wastewater to enter a physical and chemical reaction device, performing aeration-physical and chemical treatment, and enabling heavy metals and organic pollutants to be respectively separated from water under the action of a medicament; enabling clear liquid to enter an electrochemical treatment device after physical and chemical treatment of the sewage, performing key up-to-standard treatment, and deeply processing and recycling. According to the electroplating wastewater electrochemical treatment and recycling comprehensive method provided by the invention, the electroplating wastewater can be totally recycled after treatment, and after the heavy metals, precious metals and useful substances are recovered from the waste slag, mud can be used as a raw material of cement or building materials, so that the re-industrialization of the electroplating industrial wastewater can be realized, and the resource utilization of the pollutants can be further realized.

Description

technical field [0001] The invention belongs to the technical field of industrial electroplating wastewater treatment, and in particular relates to a comprehensive method for electrochemical treatment, recycling and utilization of electroplating wastewater. Background technique [0002] Heavy metal pollution in electroplating wastewater is very serious, directly endangering people's lives and health. Even if it is discharged up to the standard, a small amount will accumulate over time and become a huge disaster. Thorough treatment of electroplating wastewater and all industrial wastewater involving heavy metal pollution is an urgent task. Realizing zero emission and no pollution can ensure the accelerated and healthy development of industries involving heavy metals, the accelerated growth of GDP, the virtuous cycle of ecology, and the harmonious development of society. With the country's further emphasis on and strengthening of environmental protection work, the requirem...

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): C02F9/06C02F103/16
Inventor 黄名钟程洁黄乐
Owner 广西丽桂环保科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com