摘要： 研究采用两段沉淀法处理含氟尾气和废水及固废减量化技术，一段沉淀以理论量95%~105%石灰乳为沉淀剂，将含氟废水中的95%以上的氟离子沉淀除去；二段沉淀以理论量150%~200%的石灰乳为沉淀剂，并用盐酸调节pH至中性，两段沉淀后的废水F-质量浓度为8~12 mg/L。该项技术具有沉淀剂用量少、沉降速度快、过滤性能好、滤饼含水率低和固废量少的优点，值得进行推广应用。
关键词:
含氟尾气,
含氟废水,
两段沉淀法,
固废,
减量化
Abstract: The two-stage precipitation technology used for treating fluorine-containing exhaust gas and wastewater, and the solid waste reduction technology have been researched. In the first stage precipitation,a theoretical amount of 95%-105% of lime milk is to be used as the precipitant,to remove more than 95% of fluorine ion pre-cipitation from F- containing wastewater. In the second stage precipitation,a theoretical amount of 150%-200% of lime milk is to be used as the precipitant,and hydrochloric acid is to be used for adjusting the pH to neutral. Af-ter the two-stage precipitation,the wastewater F- mass concentration is 8-12 mg/L. The advantages of the technol-ogy are as follows:less precipitant dosage,quick settling speed,good filtration performance,low moisture content of filter cake and less solid waste. This two-stage precipitation technology is worthy popularizing and applying.
Key words:
waste gas containing fluorine,
wastewater containing fluoride,
two-stage precipitation process,
solid waste,
minimizing
中图分类号:
钱雪明, 王国平, 胡滨, 石琢, 徐旭辉, 周转忠, 胡夏明, 仇旭辉. 两段沉淀法处理含氟尾气、废水及固废减量化技术[J]. 工业水处理, 2017, 37(9): 97-100.
Qian Xueming, Wang Guoping, Hu Bin, Shi Zuo, Xu Xuhui, Zhou Zhuanzhong, Hu Xiaming, Qiu Xuhui. Two-stage precipitation method for the treatment of fluorine-containing exhaust gas and wastewater and solid waste reduction technology[J]. INDUSTRIAL WATER TREATMENT, 2017, 37(9): 97-100.