High-efficiency electroplating wastewater treatment and resource utilization device

A high-efficiency technology for electroplating wastewater, applied in metallurgical wastewater treatment, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of low operating cost, reduced treatment effect, small footprint, etc., and achieve the elimination of poisonous hazards , to avoid the effect of dissolution

Inactive Publication Date: 2010-08-11
深圳市蓝水晶环保有限公司
View PDF0 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for better purification of acidic ion concentrations from polluted or contaminated waters during chemical plating processes without causing damage to valuable metals such as copper (Cu). Anionic exchangers are placed inside the anodization tank to capture specific types of impurities like nitrogen dioxides (NO2), hydrocytes containing ammonia, sulfate compounds, etc., which may cause environmental concerns due to their potential negative impacts upon human health. By treating these effluents properly, this process helps recover useful materials more efficiently than traditional methods.

Problems solved by technology

Technics discuss how these technical problem addressed in the patented text relates to improving the performance of elecrochromatic cell batteries called lithiocarbon or zinc-carboxymer batteries when they come close together inside a special chamber containing specific elements like silver particles. These element surfaces act as barriers preventing charged atoms from moving freely within them while carrying out electrical conductions. To address this issue, the patents propose techniques involving applying thin films made of conductors onto the substrate surface to enhance their properties.

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
  • High-efficiency electroplating wastewater treatment and resource utilization device
  • High-efficiency electroplating wastewater treatment and resource utilization device
  • High-efficiency electroplating wastewater treatment and resource utilization device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The plating types of a hardware and plastic electroplating factory include nickel, copper, zinc, chromium, gold, and silver. Waste water containing gold and silver has been recovered separately by each workshop, and the discharged waste water mainly includes ions containing nickel, copper, zinc, chromium, and cyanide. Since hexavalent chromium cannot directly enter the recovery system, it needs to be pretreated, adding acid and reducing agent to control a certain PH value and ORP value, stirring and reacting completely before entering the recovery system together with other waste water. In addition, waste water containing oil and impurities must first be treated by grilles and oil and slag separation tanks before entering the recovery system. Discharge the pretreated wastewater into the regulating tank (with a water capacity of about 30m 3 ). The pH value of the wastewater is adjusted to a range conducive to efficient recovery of nickel. The concentration of pollutan...

Embodiment 2

[0032] The copper plating tank of an electroplating factory produces electroplating waste liquid, mainly copper sulfate and sulfuric acid, with a copper ion concentration of 748mg / L. Will be about 2.6m 3 The electroplating waste liquid is pumped into the high-efficiency metal and acid anion recovery device for electrolytic recovery. After recycling, 1940g of copper powder was collected in the collection tank of the cathode chamber. 6L of sulfuric acid with a concentration of about 50% was recovered from the anode chamber. The cathode water from which metal ions have been removed can be reused as rinse water.

Embodiment 3

[0034] An electroplating factory does aluminum surface treatment, and the treatment solution is sulfuric acid, phosphoric acid, and nitric acid. After the treatment solution is used for a period of time, the surface treatment effect is affected due to the accumulation of excessive aluminum ions. will be about 3m 3 This kind of waste liquid is pumped into the high-efficiency metal and acid ion recovery device for recovery and treatment. The mixed acid solution recovered in the anode chamber is about 7L, wherein the concentration of sulfuric acid is about 10%, the concentration of nitric acid is about 15%, and the concentration of phosphoric acid is about 60%. Since the chemical composition of the recovered mixed acid is similar to that of the original treatment solution, it can be sent back to the production link for use after a little adjustment. Aluminum is transformed into aluminum hydroxide flocs in the cathode chamber. The latter becomes a mud cake after flocculation, s...

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 discloses a high-efficiency metal and acid radical negative ion recovery device developed according to electrowinning and electroosmosis principles, which can be used for purification of electroplating wastewater and recycling of metal ions and acid radical ions. To reduce the surface current density of a cathode and improve the metal deposit efficiency, the invention designs a cathode with unique appearance and huge surface area. The powerful cathode flush nozzle designed by the invention can effectively remove metal deposited on the electrode surface, so that cathode regeneration and recovery of metal deposited on the cathode can be realized. An anion exchange membrane arranged between an anode chamber and a cathode chamber ensures that the acid radical ions can be selectively enriched in the anode chamber. The device not only contributes to regeneration and recovery of acid, but also can avoid dissolution of high-corrosion acid on metals newly deposited on the cathode. The electrode liquid reflow system arranged in the device not only can improve the recovery efficiency, but also can be used in a small recovery device for treating mass electroplating wastewater.

Description

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

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
Owner 深圳市蓝水晶环保有限公司
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