The problem of titanium white acid wastewater treatment by sulphuric acid method has been solved

The first set of membrane treatment reuse technology equipment put into operation
On August 30, Ningbo Zhongying Billion Source Environmental Protection Co., Ltd. announced that the acid wastewater treatment project of Ningbo Xinfu Titanium White Powder Co., Ltd., built with its own research and development patented technology, has been completed and put into operation. After 72 hours of continuous operation assessment, wastewater recycling rate reached 90%, waste acid recovery rate of 87%, wastewater emission reduction reached more than 90%, the whole set of equipment to meet the requirements of process design.
industry experts said that the project used acid wastewater treatment technology and equipment for domestic and foreign initiatives, from the source to change the titanium dioxide industry's existing acid wastewater treatment methods, for different acid wastewater, waste acid comprehensive treatment provides a practical solution, but also for the titanium dioxide industry pollution control provides an engineering demonstration
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" Before the treatment of titanium dioxide by sulphuric acid in waste acid, acidic wastewater has been using lime acid alkali neutralization and standard discharge process, the process will lead to large acid emissions from production, neutralized the production of titanium gypsum stacking affect the environment and water waste and other issues, acidic wastewater standard treatment has become a bottleneck restricting the development of titanium dioxide sulfate. Zhang Yifei, general manager of China Green Billion Source Company, said.
to break through this bottleneck, Zhongying Billion Source company pioneered the use of Suez's membrane product technology, microfiltration, MVR concentration and other integrated technology, for titanium acid wastewater treatment. The integrated technology and device effectively intercept, separate and purify the iron ions in waste acid and acidic wastewater and other two-price metal cations, and make the acidic wastewater completely treated and recycled. The treatment of acid, water use production line balance, to achieve the total emission reduction, resource use goals.
According to Zhang Yifei, Xinfu's acid wastewater treatment project, with a total investment of 95 million yuan, can treat 3,500 cubic meters of acidic wastewater per day, and was included in the fifth batch of third-party environmental services pilot by the Ministry of Environmental Protection in 2016. The specific process of the treatment process of the complete set of acidic wastewater membrane used in the project is as follows: first, the titanium dioxide acidic wastewater is discharged into the water collection and regulation pool, the acidic wastewater mixed homogeneity is discharged at different concentrations in the water collection adjustment pool, is fed into the pretreat treatment system, the solid titanium dioxide suspension of large particles in the acid wastewater is retained and concentrated, the concentrated slurry is nearly returned to the titanium white production line, and the acid wastewater is sent to the liquid heat exchanger for cooling. Treatment, and then through the NF membrane treatment system, the vast majority of metal ions in acid wastewater are retained and concentrated, valuable metal elements are collected for extraction, or the production of polymerized ferrous sulfate and other ancillary products;
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