摘要
为对原5万t/a TDI的流程进行改造,使其能满足7.5万t/a TDI的生产能力,通过调整该温度可以不改造光化反应塔而能满足负荷要求。另外,为解决原流程中设备腐蚀严重的问题,提出了氯化氢精制塔底采出光气直接送光气精制塔而不返回光化反应塔的思路,从而避免了微量水分的积累,降低了系统的腐蚀性,增加了系统的安全性。对需要改造的氯化氢精制塔进行了优化,找到了最佳的理论板数进料位置。改造后流程与原流程相比,各种公用工程消耗都有不同程度的降低。
In order to increase the capacity of a toluene diisocyanate(TDI) plant from 50 kt/a to 75 kt/a,a idea was presented that with adjustment of the temperature,the tower could meet the capacity requirement without modification of the tower.In addition,for decreasing erosion,a proposal was made that the phosgene from the bottom of hydrochloric refinement tower would not return to the phosgenation tower,but be sent to the phosgene refinement tower directly.By this way the accumulation of trace water was to be avoided,the erosion abated and the safety of the system strengthened.An optimal scheme for the modification was made and the optimal theoretical data for feed-in position was found.The results showed that the new process could consume less energy than that of the old process.
出处
《现代化工》
CAS
CSCD
北大核心
2007年第z1期322-324,共3页
Modern Chemical Industry
关键词
甲苯二异氰酸酯
模拟
改造
优化
toluene diisocyanate
simulation
retrofit
optimization
