前置烧焦式催化裂化装置稳态模拟：再生器取热器负荷对过程的影响

Steady state simulation of fluidized catalytic cracking(FCC)unit:Effects of regenerator heat remover duty on the process

应用本文作者课题组开发的前置烧焦式催化裂化装置过程模拟平台,对某工业装置进行现场条件下的稳态模拟,并完成全装置模型的校正及验证。在此基础上,模拟分析了再生器取热器负荷对该装置操作产生的影响。模拟结果显示,改变再生器取热器的负荷,能够有效调节两器热量平衡,在确保工艺范围不超限的前提下提高装置剂油比,原料油转化率提高,装置产品分布得到有效调节,但是使得密相床再生器密相区床层温度降低,从而影响再生器的再生效果,不利于提升管进口再生催化剂初始活性的提高。

Steady state simulation research was carried out for one industrial fluidized catalytic cracking （FCC） unit using the simulation platform developed by our group. The unit model was calibrated and validated by the industrial data collected from the unit. The effects of regenerator heat remover duty on the unit operation were then simulated and analyzed in this paper. The simulation results showed that, via the regulation of regenerator heat remover duty, the unit operator could change unit heat balance effectively and tune up the ratio of catalyst to oil before violating the operating range of process variables, thus more feedstocks could be converted to lighter products and the products distribution could then be adjusted effectively. However it could also decrease the temperature of dense bed in second stage regenerator and then deteriorate the operating performance of regenerator, thus its application is not conducive to improve the initial activity of regenerated catalyst.