二水法改半水-二水法磷酸生产技术改造  

Transformation of phosphoric acid production technology from dihydrate process into HDH process

作　　者：师永林 SHI Yonglin(Yunnan Yuntianhua Co.,Ltd.,Kunming 650224,China)

机构地区：[1]云南云天化股份有限公司,云南昆明650224

出　　处：《磷肥与复肥》2018年第7期24-27,共4页Phosphate & Compound Fertilizer

摘　　要：为了优化精制磷酸装置原料磷酸预处理流程,将萃取I系列和萃取II系列2套二水法磷酸装置,改造为1套7万t/a半水-二水法磷酸装置。主要介绍改造内容,改造后的工艺流程、装置的运行情况、存在问题及解决措施。技改后,经过半年的试生产,装置产能得到明显提升,技术经济指标得到较大改善,总磷收率大于98.0%,是二水法改半水-二水法磷酸生产技术的重要探索。In order to optimize the pretreatment process of raw acid for refined phosphoric acid plant,the two series dehydrate phosphoric acid plants of extraction I series and extraction II series are transformed to a set of 70 kt/a HDH phosphoric acid plant. The transformation contents, technological process and operation of the equipment after transformation,existing problems and solutions are introduced. After transformation,equipment capacity has been significantly increased,technical and economic indicators have been greatly improved,the total phosphorus yield is greater than 98%. It is an important exploration for transformation of phosphoric acid production technology from dehydrate process into HDH process.

关 键 词：磷酸 二水法 半水-二水法 技术改造 

分 类 号：TQ126.35[化学工程—无机化工]