The invention discloses a multi-effect rectification
system control method and a
control system thereof.The method comprises the steps that technological parameter data in a multi-effect rectification
system are collected in real time, and the technological parameter data comprise the steam flow, the feeding flow, the
reflux flow and the
recovery quantity of each stage of rectification
tower; the temperature and the pressure of each
tower plate in each stage of rectifying
tower are measured; for each stage of rectifying tower, acquiring static operation parameters of the rectifying tower in a set load section based on a full-automatic
load regulation algorithm; the static operation parameters comprise the steam flow, the
reflux quantity and the extraction quantity of each stage of rectifying tower; for each stage of rectifying tower, on the basis of the static operation parameters, dynamic operation parameters in the load change process are obtained through a load transition
algorithm, and the multi-effect rectifying
system is controlled according to the dynamic operation parameters. The method can automatically adapt to feeding change and production load adjustment, optimizes energy efficiency and product quality in the rectification process, automatically adjusts
system parameters when the production load fluctuates, and realizes
optimal control of energy efficiency and product quality.