磷铵工业尾气脱湿减排机理及清洁工艺  

Mechanism of dehumidification and reduction for cleaner production of ammonium phosphate exhaust gases

作　　者：马空军[1] 朱家骅[2] 李剑琦[3] 

机构地区：[1]新疆大学化学化工学院,新疆乌鲁木齐830046 [2]四川大学化工学院,四川成都610065 [3]浙江大学经济学院,浙江杭州310058

出　　处：《化学工程》2014年第7期74-78,共5页Chemical Engineering(China)

基　　金：国家高技术研究发展计划资助项目(2002AA647020)

摘　　要：对磷铵(DAP)尾气冷凝脱湿数值模拟,揭示了DAP尾气传热传质过程为雾冷凝和膜冷凝共存的机理。基于模拟分析,提出了利用DAP尾气资源化循环生产磷酸一铵(MAP)的清洁工艺,现场实验证明了DAP尾气部分冷凝-磷酸降膜蒸发过程耦合技术的可行性。实验结果表明:DAP尾气能量的消减量可替代24万t/a MAP生产装置热能消耗的45%以上,展示了利用DAP尾气资源化循环生产MAP清洁生产技术的前景。The numerical simulation on the process of condensation dehumidifying of ammonium phosphate exhausts reveals a co-existed mechanism of both fogging and film condensation for the heat and mass transfer process of DAP exhausts.Based on simulation analysis,the processes of condensation dehumidifying of ammonium phosphate exhausts were proposed. An unique technique was developed to make full use of the cleaner process for monoammonium phosphate （MAP）production combined with recycling of exhaust gases from DAP production.The feasibility of integrating the processes of partial condensation of tail gas with falling film evaporation of raw phosphoric acid was demonstrated by the pilot experiments.The experimental results could be used to substitute as much as 45%of the heat energy consumption for a 240 kt/a MAP production line.A very promising future application for the cleaner process of MAP production combined with recirculation of DAP exhaust gases was displayed.

关 键 词：尾气 冷凝 数值模拟 清洁工艺 

分 类 号：TQ444.2[化学工程—化学肥料工业]