浅析磷酸输送管道清洗

A brief analysis on cleaning phosphoric acid transfer line

随着磷化工的发展,湿法磷酸在磷酸生产工业中的地位日趋重要。在磷复肥生产过程中,由于磷酸含有一定量的杂质,经常出现管线堵塞而影响生产,需对管线进行清理,一般情况均用稀硫酸溶液对管线进行清洗。利用湿法磷酸半水法和二水法工艺原理的不同,用浓磷酸和稀磷酸间歇输送的方法,具有一定的可行性。

As development of phosphorus chemical engineering, wet- process phosphoric acid became more and more important in phosphoric acid industry. In phosphoric compound fertilizer production, because of some impurities contained in phosphoric acid, transfer line block was often occurred. Cleaning line pipe was needed, so the line pipe was cleaned by diluted sulfuric acid solution in the ordinary course. Taking advantage of difference between hemi - hydrated wet - process phosphoric acid and dehydrated one, the method by crncentrated phosphoric acid and diluted one intermittently transferring has some practicability.