A Static Treatment Process for Electroplating Wastewater Based on Redox Reaction

A technology for static treatment and electroplating wastewater, which is applied in the fields of oxidized water/sewage treatment, reduced water/sewage treatment, metallurgical wastewater treatment, etc. It can solve the problems of unreachable wastewater discharge, direct contact of toxic substances with the environment, and insufficient utilization of raw materials. , to achieve the effect of increasing the size of the precipitate

Active Publication Date: 2021-05-28
浙江升阳再生资源科技有限公司
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The utilization rate of metal raw materials of most plating types in my country's electroplating enterprises is lower than that of foreign countries
[0009] (2) Electroplating wastewater treatment needs to be further optimized
In actual operation, most of the wastewater discharge does not meet the national discharge standards, and some raw materials are not fully utilized but simply treated, which not only leads to direct contact of toxic substances with the environment, pollutes water bodies, and causes irreparable impact on people's production and life
[0010] (3) Due to the influence of process technology, production equipment and other factors, the unit water consumption of each plating type is relatively large, and the cost and benefit of electroplating production are not directly proportional

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

Embodiment Construction

[0027] The present invention comprises the following steps:

[0028] Step 1: adjust the pH value of the wastewater: adjust the pH value of the wastewater to 6 with 10% sulfuric acid solution or 4% sodium hydroxide solution;

[0029] Step 2: Oxidation reaction: add sodium hypochlorite at a ratio of 30 mg / L, mechanically stir for 20-30 min, air stir for 20-30 min, filter the precipitate, and obtain the supernatant;

[0030] Step 3: adjust the pH value of the wastewater again: adjust the pH value of the solution to 8-9 with 10% sulfuric acid solution or 4% sodium hydroxide solution;

[0031] Step 4: Add flocculant: add flocculant at a ratio of 200-300mg / L, stir mechanically for 15min-20min, let stand for 1.5h, filter the precipitate, and obtain the supernatant;

[0032] Step 5: Reduction reaction: add activated carbon obtained by the impregnation-sintering method for catalytic reduction; add activated carbon to the liquid after removing the precipitate for reduction reaction, le...

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a static treatment process of electroplating wastewater based on oxidation-reduction reaction, which comprises the following steps: step 1: adjusting the pH value of wastewater; step 2: oxidation reaction; step 3: adjusting the pH value of wastewater again; step 4: adding a flocculant Step 5: Reduction reaction; Step 6: The supernatant obtained in Step 5 is recycled or discharged, and the precipitate obtained in Step 2, Step 4, and Step 5 is dried at 105° C. for 24 hours, and the dried large particle precipitate is Bag after crushing. The invention can react at the pH with the best effect of sodium hypochlorite, and increase the size of the precipitate through the reaction at the optimal pH of the flocculant; it can perform the reduction reaction with the activated carbon obtained by the impregnation-sintering method to ensure that the supernatant meets the discharge requirements.

Description

【Technical field】 [0001] The invention relates to the technical field of electroplating wastewater, in particular to the technical field of electroplating wastewater static treatment process based on redox reaction. 【Background technique】 [0002] As an important surface engineering technology, electroplating is a process that uses electrochemical methods to decorate, protect and obtain certain new properties on metal and non-metal surfaces. Because electroplating can be used for cosmetic treatment of metal surfaces, it can obtain metal films with better decoration, functionality and protection on various substrates. Therefore, the electroplating industry can serve all walks of life, such as metallurgy, vehicles, military industry, electrical appliances, aerospace, etc. It is one of the indispensable industries, and it has not been replaced by other technologies in all aspects, but is constantly developing new technologies and new techniques. At present, the scale, output ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F103/16
CPCC02F1/001C02F1/281C02F1/5236C02F1/56C02F1/66C02F1/70C02F1/76C02F9/00C02F2103/16C02F2301/08
Inventor 张红
Owner 浙江升阳再生资源科技有限公司
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