摘要
对甲苯二异氰酸酯生产中高压、低压、负压三级脱光气系统流程进行了分析,找出了原流程中存在的不足,提出了高压、常压、负压操作的改造方案,并对原低压脱光气塔增加了塔底再沸器以控制光气的纯度。在原流程改动很少的情况下,使得光气回收系统的负荷降低了79.93%,负压脱光气塔真空系统吸气量降低了58.78%,并且增加了操作的弹性,使得流程能够更加平稳的运行。
The process of the phosgene-deprivation system in tolene-2,4-diisocyanatel（TDI） production is studied ,the old process which consisted of three columns and operated under high pressure, low pressure and vacuum conditions respectively to separate phosgene is analyzed on, the basis of that new process was put forward, which the three columns operate in high pressure, normal pressure and vacuum conditions. A new reboiler is added to the normal pressure column to control the quality of the phosgene. Compared with the old process,the new process can reduce 79.93% burden of the phosgene-recycle system and a 58.78% burden of the vacuum system,and at the same time,the new process can run more flexibly and robustly than the old one.
出处
《现代化工》
EI
CAS
CSCD
北大核心
2006年第6期51-52,54,共3页
Modern Chemical Industry
关键词
甲苯二异氰酸酯
光气
优化改造
Tolene-2,4-diisocyanatel（TDI）
phosgene
optimal modification
