延迟焦化加热炉的自适应状态的反馈预测控制和专家控制

摘要

An adaptive state feedback predictive control(SFPC)scheme and an expert control scheme are presented and applied to the temperature control of a 1 200 kt·a-1 delayed coking fumace,which is the key equipment for the delayed coking process.Adaptive SFPC is used to improve the performance of temperature control in normal operation.A simplified nonlinear model on the basis of first principles of the furnace is developed to obtain a state space model by linearization.Taking advantage of me nonlinear model.an online model adapting method is presented to accommodate the dynamic change of process charactenstics because of tube coking and load changes.To compensate the larRe mverse response of outlet temperature resulting trom the sudden increase ot injected steam of a particular velocity to tubes,a monitoring method and an expert control scheme based on heat balance calcula tion are proposed.Industrial implementation shows the effectiveness and leasibility of the proposed control strategy.