Diffusion dialysis waste acid recovery
Chemical foil industry-diffusion dialysis sulfuric acid reuse project.
PROJECT INTRODUCTION
Sulfuric acid/aluminum sulfate and nitric acid/aluminum nitrate will be produced in the corrosion section of the foil production. The diffusion dialysis device can effectively reuse the sulfuric acid and nitric acid in the waste acid instead of the traditional neutralization treatment method, which greatly reduces the residue and salt content, the acid recovery rate is> 80%, and the metal ion retention rate is> 90%. At present, the diffusion dialysis acid recovery technology in the chemical foil industry waste acid treatment coverage has reached more than 85%.
Process flow
Project Site
Aluminum profile industry-diffusion dialysis sulfuric acid recovery project
PROJECT INTRODUCTION
A large amount of waste sulfuric acid is produced in the anodizing process of aluminum profile. More than 80% of sulfuric acid can be purified from the waste liquid by using diffusion dialysis device, and the retention rate of aluminum ions reaches 90%. The content of aluminum ions in the returned oxidation tank liquid is less than 1g/L. It has good effect on the stable control of aluminum ions in the tank liquid, and the quality of aluminum profile is significantly improved, while the power consumption and waste water disposal cost are greatly reduced, to achieve greater economic benefits.
Process flow
Project Site
Copper hydrometallurgy industry-diffusion dialysis electrolysis lean solution copper removal project.
PROJECT INTRODUCTION
In copper hydrometallurgy production, high-acid copper-containing mother liquor is produced in the copper sinking process. Sulfuric acid is recovered by diffusion dialysis device. The recovery rate of sulfuric acid can reach more than 80% and the copper interception rate is more than 90%, which greatly reduces the amount of liquid alkali consumed in mother liquor treatment. At the same time, the sulfuric acid recovered by diffusion dialysis is returned to the original process for continuous use after enrichment, bringing good economic and environmental benefits to the enterprise.
Process flow
Project Site
Graphite industry-diffusion dialysis mixed acid recovery project
PROJECT INTRODUCTION
According to the special components of mixed acid (hydrochloric acid, nitric acid and hydrofluoric acid) in graphite industry, the mixed acid is purified and separated by diffusion dialyzer device of Shandong tianwei membrane technology co., ltd. the acid recovery rate reaches more than 80%, and the recovered solution is continuously returned to graphite production process after being thickened according to the proportion, which not only solves the discharge problem of high concentration mixed acid, but also realizes the effective reuse of mixed acid.
Process flow
Project Site
Titanium dioxide industry-diffusion dialysis cathodic membrane technology
PROJECT INTRODUCTION
The project takes diffusion dialysis technology as the core, and couples the processes of microfiltration, diffusion dialysis and nanofiltration. The microfiltration process is used as the pretreatment, the high-performance diffusion dialysis membrane independently developed by Shandong Tianwei Membrane Technology Co., Ltd. is used to realize the recovery of sulfuric acid and remove ferrous ions, and the nanofiltration process is used to realize the polishing treatment of ferrous ions, and finally realize the recycling of waste sulfuric acid from the by-product of the bowl white powder.
Process flow
Operation effect
Feed solution: waste sulfuric acid from titanium dioxide by-product, 500 tons/day, sulfuric acid concentration ≥ 24%, ferrous sulfate content <160g/L;
Recovered acid: 480 tons/day, sulfuric acid concentration ≥ 22% (recovery rate ≥ 88%, ferrous content <500mg/L (rejection rate ≥ 99%).
Recovered acid: 480 tons/day, sulfuric acid concentration ≥ 22% (recovery rate ≥ 88%, ferrous content <500mg/L (rejection rate ≥ 99%).
economic benefit
(1) 160000 tons of sulfuric acid with a concentration of 22% can be recovered every year, equivalent to 36000 tons of 98% concentrated sulfuric acid;
(2) 30000 tons of neutralization alkali can be saved every year, and 45000 tons of solid waste can be reduced.
(2) 30000 tons of neutralization alkali can be saved every year, and 45000 tons of solid waste can be reduced.
social benefit
Recycled acid can be used for the development of new products, but also can be evaporated and concentrated back to the previous production process, greatly reducing the amount of waste acid emissions, reducing the amount of neutralization with alkali, the whole process of no new pollutants discharged, the process of green environmental protection.
Project Site
Pharmaceutical industry-diffusion dialysis hydrochloric acid recovery project
PROJECT INTRODUCTION
In the production process of pharmaceutical intermediates, 16%-18% hydrochloric acid waste liquid is produced. Diffusion dialysis device is used to separate hydrochloric acid from copper chloride. The concentration of recovered hydrochloric acid can reach more than 15%. After further enrichment, it is returned to the original production process for further use. The residual liquid after acid removal is neutralized. The process realizes the reuse of acid, and also reduces the amount of alkali used in neutralization and reduces the salt content of neutralization water.
Project Site
Contact Us
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Production base: 00699 North Wisdom Third Street, Weifang Binhai Economic and Technological Development Zone
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