ApplicationNo./PatentNo.: 2009 10095979
The invention discloses a coagulant for treating fluorine-containing wastewater and an application process thereof. The coagulant for treating fluorine-containing wastewater is a composite coagulant made by adding polymer organic additives in the synthesis process of polyaluminum chloride. The macromolecular organic assistant is cationic polyacrylamide with amination degree of 10-30% and molecular weight of 5-8 million; The addition of polymer organic additives is 1- 10% of the mass of AlCl3.6H2O The application process includes the following steps: firstly, adding a regulator lime milk into the fluorine-containing wastewater to make the pH value of the fluorine-containing wastewater between 6 and 9; Then, a coagulant for treating fluorine-containing wastewater is added for coagulation treatment, so that the final concentration of the coagulant for treating fluorine-containing wastewater in the fluorine-containing wastewater is 900-1500mg/L. The coagulant for treating fluorine-containing wastewater has the advantages of cheap raw materials, low production cost, simple application process, high removal efficiency, low investment cost, high efficiency and economy.