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In this paper, experimental study of the thermal power plant circulating water sewage water reuse in the phosphorus-based inhibitor effect on coagulants . Using poly ferric coagulant polyacrylamide coagulant and coagulant analyzed inhibitors and mechanism of action . The experimental results show that when the poly- iron dosage is 30mg / L, PAM dosage is 1mg / L when coagulation best, phosphorus scale inhibitor HEDP, EDTMP, ATMP effect on Coagulation have adverse effects , with NaOH control pH = 10.5 ~ 11.5 when coagulation is better ; Na 2 CO 3 no significant effect on the coagulation effect , the actual project advised while adding NaOH and Na 2 CO 3 . Guohua Dingzhou Power Plant Circulating Water sewage water reuse project adopted this method and achieved good coagulation effect , pretreatment dosage of NaOH 10.0mmol / L, Na 2 CO 3 1.5mmol / L (pH: 11.0 ~ 11.5), polymeric iron 30.0mg / L, coagulant 2.0mg / L. This project provides for the actual experimental data and theoretical basis .
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