摘要
缩二脲为白色固体,难溶于水,熔点高达190℃,在尿素合成以及尿素溶液浓缩蒸发过程中产生的缩二脲会大量堆积在蒸发器的上部,当缩二脲堆积过多时会严重影响蒸发系统真空度,挤压设备,不易被清理,也会造成水解解吸系统无法正常运行。介绍了研究如何通过部分工艺改造和工艺参数调整以及操作维护来减少缩二脲在蒸发器中堆积。
Biuret is of solid in white.With its melting point of 190℃,it is insoluble in water.A large amount of biuret accumulates on the upper evaporator during urea synthesis and evaporation.Excessive accumulation greatly affects the vacuum in evaporation system,which aill cause abnormal operation of desorption system.This article introduces how to reduce biuret accumulation in evaporator.
出处
《化工设计通讯》
CAS
2008年第1期15-17,28,共4页
Chemical Engineering Design Communications
关键词
缩二脲
堆积
蒸发
副反应
biuret,accumulation,evaporation,side reaction
