基于分散控制系统的半水法湿法磷酸生产PID控制

PID control for production of hemihydrate wet phosphoric acid based on distributed control system

根据半水法湿法磷酸的生产特点,通过分散控制系统(DCS)进行精确控制,利用皮带计量秤对磷矿进行计量,电磁流量计对返酸、混酸、浓硫酸进行计量配比参与半水法湿法磷酸的反应;并利用蒸汽加热反应槽,为湿法磷酸半水反应提供充分条件,进而高效地萃取出磷酸。

According to the production characteristics of semi-water wet phosphoric acid,the distributed control system(DCS)is used for accurate control,and the belt metering is used to measure phosphate ore.The electromagnetic flowmeter is used to measure the ratio of returned acid,mixed acid and concentrated sulfuric acid to participate in the reaction of semi-water wet phosphoric acid.The steam heating reaction tank provides sufficient conditions for semi-water reaction of wet process phosphoric acid and efficiently extracts phosphoric acid.