一种TDI脱焦工艺系统及其在TDI生产工艺中的应用
本发明公开了一种TDI脱焦工艺系统及其在TDI生产工艺中的应用。该TDI脱焦工艺系统包括脱焦塔、第一循环泵、塔釜再沸器和刮膜蒸发器;通过增设刮膜蒸发器对脱焦塔脱焦后的塔釜液进行再处理,降低塔釜液中焦油的含量,从而避免焦炭沉积物导致换热器换热效果下降。该TDI脱焦工艺系统应用于TDI生产工艺中,由于脱焦工艺系统的改进,整体运行稳定性更高,使用寿命更长。
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