Sewage purification method during sodium fluosilicate production

• Main Authors: WU YOULI, ZHANG CHENG, YANG CHANGYONG, XIANG SHUANGLONG, CHEN BIN, LIAO JIXING, ZHOU BIN, ZHANG WEIHONG
• Format: Patent
• Language: Chinese; English
• Published: 02.02.2018
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to the technical field of sewage treatment, and particularly relates to a sewage purification method during sodium fluosilicate production. The method comprises the steps of adjusting the Na+ content in sewage and conducting flocculant precipitation, flyash mixing and membrane separation. According to the sewage purification method during the sodium fluosilicate production, silicon dioxide removal in the sewage during the sodium fluosilicate production is and a flocculant are researched, finally a composite flocculant is obtained through compounding on the condition of acheap carbon source and nitrogen source, silicon dioxide in the sewage can effectively precipitate, it is found through an experiment that the content of the silicon dioxide in the sewage can reach 4.77 mg/L to the lowest degree after treatment, the using amount of the flocculant is little and reduced, cyclic utilization of workshop production water is achieved, and the production cost is reduced.Besides, the flocculant r