尾气循环流化氨化制备粒状磷铵过程分析与现场试验  

Process analysis and pilot experiment for granular ammonium phosphate production by fluidizing ammonification and granulation

作　　者：杜怀明[1,2] 周勇[3] 朱家骅[3] 黄卫星[3] 王江平 郭仕伟 张红映 徐春 

机构地区：[1]四川理工学院材料与化学工程系,四川自贡643000 [2]四川大学化工学院化学工程与技术博士后流动站,四川成都610065 [3]四川大学化工学院,四川成都610065 [4]宏福总公司瓮福磷肥厂,贵州福泉550501

出　　处：《现代化工》2009年第12期62-65,共4页Modern Chemical Industry

基　　金：国家"863"计划资助项目(2006AA05Z235)

摘　　要：针对磷铵生产过程高含湿尾气排放量大的特点,首次提出了尾气循环流化氨化制备粒状磷铵新工艺,研究了高含湿气体条件下喷雾流化、氨化反应、结晶干燥一体化工艺过程。工艺计算结果表明,尾气循环条件下系统热效率达59.52%,比传统干燥技术提高约1倍。设计建成了千吨级中试装置,并在现场运行条件下考察了系统的放大规律和操作弹性,为该技术的产业化开发和推广奠定了基础。According to the characteristics of the tail gas, i. e. high humidity and huge, a novel process of granular ammoltium phosphate production by fluidizing ammonification and granulation with tail gas recycling is put forward, to study the process coupling between spraying fluidizing ammonification, crystallization and drying. The process calculation result for the novel process show that the coupled process of reaction, granulation and drying has a heat utilization efficiency of 59.52%, which is about two times of that of the traditional dryer. The scaling research is carried out by design and built a pilot test device with MAP production capacity of 1 000 t/a, and the scaling law and operational flexibility are studied in the pilot test, which provide a basic for the process＇s industrialization development and popularization.

关 键 词：尾气循环 流化-氨化 反应-干燥 过程耦合 磷铵 

分 类 号：TQ444.2[化学工程—化学肥料工业]