济源市化肥厂３万吨／年料浆法磷铵装置及其配套４万吨／年硫酸装置的用水方案，原设计为各成系统，进入装置的一次水各自在内部循环复用，分别排污。这种水利用方案由于复用指数低，所需一次水量大，排放污水多，不仅增加了污水处理的负荷，还降低了装置有用物料的收率，... Jiyuan City Fertilizer Plant 30,000 tons / year slurry AP plant and its supporting 40000 tons / year sulfuric acid plant water program, the original design for the system, into the device of a water cycle in the internal reuse, respectively, sewage . Due to the low reusability index, this kind of water utilization scheme needs a large quantity of water and discharges more sewage, which not only increases the load of sewage treatment, but also reduces the yield of useful materials of the device.