磷酸浓缩预脱氟耦合汽提深度脱氟生产饲料级磷酸工艺技术  

Process technology of feed-grade phosphoric acid production by concentration and pre defluorination of phosphoric acid coupled with deep defluorination by air stripping

作　　者：陈玖毅 符义忠 姜威[1,2,3] 李建闻 CHEN Jiuyi;FU Yizhong;JIANG Wei;LI Jianwen(Yunnan Phosphate Group Co.,Ltd.,Kunming 650600,China;National Engineering and Technology Research Center for Development and Utilization of Phosphorus Resources,Kunming 650600,China;Yunnan Key Laboratory of Phosphorus Chemical Energy Conservation and New Materials,Kunming 650600,China)

机构地区：[1]云南磷化集团有限公司,云南昆明月650600 [2]国家磷资源开发利用工程技术研究中心,云南昆明650600 [3]云南省磷化工节能与新材料重点实验室,云南昆明650600

出　　处：《磷肥与复肥》2022年第10期25-26,共2页Phosphate & Compound Fertilizer

基　　金：云南省磷化工节能与新材料重点实验室(2019)。

摘　　要：针对浓磷酸脱重金属及汽提脱氟中预处理澄清酸澄清时间不足、固含量偏高,脱氟磷酸产能偏低及脱氟塔石墨换热器效率偏低的问题,通过工艺优化改造,最终确定磷酸浓缩预脱氟耦合汽提深度脱氟生产饲料级磷酸工艺技术路线,介绍其工艺技术流程、指标控制及脱氟原理。改造后饲料级磷酸产量提高了36.81%,装置顺利实现产业化目标。In view of the insufficient clarification time and high solid content of pretreatment clarification acid for heavy metal removal and stripping off fluorine, low defluorinated acid capacity and low efficiency of graphite heat exchanger in defluorination tower, process optimization is carried out to determine the technical route for production feed-grade phosphoric acid by concentration and pre defluorination of phosphoric acid coupled with deep defluorination by air stripping. The technical process, index control and the principle of defluorination are introduced. After the transformation, the yield of feed-grade phosphoric acid is increased by 36.81%, realizing the industrialization goal of the plant.

关 键 词：湿法磷酸 真空浓缩 汽提 脱氟 

分 类 号：TQ126.35[化学工程—无机化工]