改进工艺降低尿素装置二段蒸发尾气氨含量  

DECREASING NITROGEN CONTENT IN TAIL GAS FROM THE SECOND STAGE EVAPORATOR IN UREA PLANT BY PROCESS INNOVATION

作　　者：付开全 

机构地区：[1]贵州赤天化股份有限公司,贵州赤水564707

出　　处：《大氮肥》2015年第2期119-121,共3页Large Scale Nitrogenous Fertilizer Industry

摘　　要：针对尿素装置二段蒸发尾气氨含量偏高,对系统工况、组分进行分析计算,认为冷凝系统游离氨含量偏高、喷射器抽吸量大是造成尾气氨含量偏高的主要原因。通过改进和优化工艺,大幅降低了尾气氨含量,每年可节约液氨120t,效益明显。Nitrogen content in tail gas from the second evaporator in urea plant was found to be higher. Main reasons thereof were found by analyzing the process cases and composition, those are： high free ammonia in condensate system and high extraction volume of ejector. The modification and process optimization made the nitrogen content decreased dramatically , and brought apparent profit as saving liquid ammonia 120t/a.

关 键 词：尿素装置 蒸发系统 尾气 氨含量 

分 类 号：TQ441.41[化学工程—化学肥料工业]