循环冷却水处理技术在半个多世纪中得到了快速发展，所使用的水处理药剂从开始时的铬酸盐到聚磷酸盐、有机磷酸盐、不饱和羧酸聚合物、磺酸盐聚合物；水处理方案从开始时的加酸运行，到自然ｐＨ运行；浓缩倍数从低到高；处理目的从解决腐蚀问题到既解决腐蚀，又解决结垢，同时节约用水，减少污水排放，生产装置长周期运行等 Circulating cooling water treatment technology has been rapidly developed in more than half a century. The water treatment chemicals used were from chromate to polyphosphate, organic phosphate, unsaturated carboxylic acid polymer, and sulfonate polymer. The water treatment scheme starts from the acid-adding operation to the natural pH operation; the concentration factor is from low to high; the purpose of the treatment is to solve the corrosion problem and solve both the corrosion and fouling, while saving water and reducing the discharge of sewage. Long-term operation, etc.