The operation pressure of debutanizer was unstable since a light hydrocarbon recovery unit had been put into use.

某轻烃回自投用以来,脱丁烷塔操作压力一直不定。

By applying multivariable model predictive control (MPC) technology, the control performance of the gasoline debutanizer of fluid catalytic cracking unit can be improved.

多变量模型预测控制技术应用于催化裂化定塔的控制，有助于提高定塔的控制品质。