关键词:

常减压装置, 原油混炼优化, 软测量, 模型预测控制

Abstract:

Aiming at the great difficulty in crude oil unit (CDU) operation for the diversity of crude oil, an advanced process control comprehensive scheme is presented, which composed of both decreasing the property variety of crude oil feedin and introducing parameters reflecting property into soft sensor and controller.By scheduling and blending the optimization of multiple crude oils to be refined, the blended crude oil feed-in has relatively steady properties and has small influence on parameters of the unit operation, hence the disturbance from the change in operating point is decreased remarkably.On the other hand, for the remaining small property variety of blended crude oil, the parameters reflecting property are introduced to soft sensor calculation and advanced process controller based on model predictive control to overcome the disturbance of property variety.By scheduling and blending optimization, the parameter varieties of unit operation are small, which makes it possible that the soft sensor and predictive control using linear approximate model have a great performance.Application on a CDU with multiple crude oils shows the validity of the comprehensive scheme.

Key words:

常减压装置, 原油混炼优化, 软测量, 模型预测控制