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0引言川化股份有限公司是一家大型化工国有控股上市公司,主要产品有尿素、硝酸铵、三聚氰胺、浓硝酸、硫酸、食品二氧化碳、双氧水及催化剂等。公司制酸厂结晶硝铵装置1996年技改投产后,由于装置设备和工艺流程的变化,每年都有一定数量的产品发生“烧包”现象(由于结晶硝铵温度
0 Introduction Sichuan Chemical Co., Ltd. is a large state-controlled listed chemical companies, the main products are urea, ammonium nitrate, melamine, concentrated nitric acid, sulfuric acid, food carbon dioxide, hydrogen peroxide and catalysts. Company ammonium acid plant ammonium nitrate plant production Technical transformation put into operation in 1996, due to changes in equipment and process equipment, a certain number of products each year, “burning package” phenomenon (due to the crystallization of ammonium nitrate temperature