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新型混凝剂的开发是强化混凝的关键。本文以氯化铝、氯化钙、九水硅酸钠为原料,采用复合共聚法制备出聚硅酸铝钙混凝剂(PSAC),研究了金属离子与硅摩尔比(M/Si)、铝离子与钙离子摩尔比(Al/Ca)、硅酸钠浓度、熟化时间(d)等因素对PSAC混凝性能的影响。以实验室配水为处理对象评价了PSAC的混凝性能并与常规混凝剂进行了对比研究。结果表明:PSAC各组分在比例Si∶Al∶Ca为10∶9∶6时,有最佳的除浊率,效果优于聚合氯化铝(PAC)等常规混凝剂,并且具有较好的稳定性。
The development of new coagulants is the key to strengthen coagulation. In this paper, calcium aluminum polysilicate coagulant (PSAC) was prepared by using aluminum chloride, calcium chloride and sodium silicate as raw materials, and the molar ratio of metal ions to silicon (M / Si) The influence of Al / Ca, sodium silicate concentration and aging time (d) on the coagulation performance of PSAC was investigated. The coagulation performance of PSAC was evaluated with laboratory water distribution as the treatment object and compared with the conventional coagulant. The results showed that PSAC had the best turbidity removal ratio at the ratio of Si: Al:Ca of 10: 9: 6, which was better than conventional coagulants such as polyaluminum chloride (PAC) Stability.