Waste Acid Recovery by Diffusion Dialysis
Chemical foil industry-Sulfuric acid recovery project using permeable membrane technology
Project Introduction
The corrosion section in the production process of chemical foil will produce wastewater containing sulfuric acid/alum or nitric acid/alum. The diffusion dialysis device can effectively achieve the reuse of sulfuric acid and nitric acid, instead of traditional acid recovery and neutralization methods, with an acid recovery rate of>80% and a metal ion removal rate of>90%. At present, the popularization rate of diffusion dialysis acid recovery technology in the treatment of waste acid in the chemical foil industry has exceeded 85%.
Technological Process
The Project Site
Aluminum profile industry-Diffusion dialysis sulfuric acid recovery project
Project Introduction
A large amount of waste sulfuric acid is generated during the anodizing process of aluminum profiles. The diffusion dialysis device can purify over 80% of sulfuric acid from waste liquid, and the retention rate of aluminum ions can reach 90%. The concentration of aluminum ions in the returned oxidation bath is less than 1g/L, which has a good effect on controlling the stability of aluminum ions in the bath. At the same time, the quality of aluminum profiles has significantly improved, while electricity consumption and wastewater treatment costs have been greatly reduced, achieving significant economic benefits.
Technological Process
The Project Site
Copper Wet Metallurgy Industry-Diffusion Dialysis Electrolysis Enrichment Copper Removal Project
Project Introduction
In the production of copper hydrometallurgy, there are high concentrations of acid solution and copper ions in the mother liquor during the copper precipitation process. Sulfuric acid is recovered through a diffusion dialysis device. The recovery rate of sulfuric acid can reach over 80%, and the copper removal rate exceeds 90%, greatly reducing the consumption of liquid alkali in the mother liquor treatment. At the same time, by adding high concentration acid to regulate the diffusion dialysis recovery of sulfuric acid and returning it to the original process for continuous use, it has brought good economic and environmental benefits to the enterprise.
Technological Process
The Project Site
Graphite Industry-Mixed Acid Recovery Diffusion Dialysis Project
Project Introduction
The mixed acid containing hydrochloric acid, nitric acid, and hydrofluoric acid in the graphite industry is purified and separated by the diffusion dialysis device of Shandong Tianwei Membrane Technology Co., Ltd. The acid recovery rate can reach over 80%. The recovered liquid is concentrated proportionally and then returned to the graphite production process for use. This not only solves the problem of high concentration mixed acid discharge, but also achieves effective reuse of mixed acid.
Technological Process
The Project Site
Pharmaceutical Industry-Diffusion Dialysis Hydrochloric Acid Recovery Project
Project Introduction
During the production process of pharmaceutical intermediates, 16% -18% hydrochloric acid waste liquid is generated. Hydrochloric acid and copper chloride are separated by a diffusion dialysis device, and the recovered hydrochloric acid concentration can reach over 15%. After further concentration, it is returned to the original production process for continued use, and the residual liquid after acid removal is neutralized. This process achieves the repeated use of acid, while also reducing the amount of neutralizing base used and the salt content of neutralizing water.
Technological Process
Contact Us
Address: 155 Incubation Two Lane, Photoelectric Industrial Park, Weifang High-tech Zone, Shandong
Production base: 00699 North Wisdom Third Street, Weifang Binhai Economic and Technological Development Zone
Tel: +86-536-8895639 +86-16605366009
Fax: +86-536-8861088
Mailbox: wx@sdtianwei.com
