催化裂化分馏塔动态仿真数学模型和算法

将催化裂化液相产物按集总虚拟组分处理,建立了逐板动态数学模型,采用有效、简便的动态仿真计算策略,开发了通用动态仿真软件包.得到各种过渡过程中每层塔板上温度、压强、气液相组成和负荷以及产品流量和组成的响应历程,并给出各层塔板上操作点的动态响应轨迹及其在适宜操作区的位置.

DYNAMIC SIMULATION MODEL AND ALGORITHM FOR CATALYTIC CRACKING FRACTIONATOR

A mathematical dynamic model for the fractionator of the Fluidized Catalytic Cracking Unit (FCCU) has been developed. In this model the liquid products of the catalytic cracking are described by four pseudocomponents. Material balance and enthalpy balance are written for each plate. The supplementary equations of this model include plate hydraulics and vapor- liquid equilibrium of pseudocomponents were selected from existing correlations and linearized enthalpy models of pseudocomponents and inert components were put forward by the authors. The results of the simulation experiments show that this dynamic model can predict the dynamic and static responses of each plate when the operating conditions of the fractionator are changed. The predictions of this model fit in with the data of an industrial FCCU fractionator.