Optimization Of Steady State For Reactor And Regenerator System In FCCU

Fluidized catalytic cracking process is an essential petrochemical refining process. Its total processing capacity in a variety of conversion processes among the best, the complexity of its principles and processes is also ranked first in a variety of oil conversion processes. So it is necessary to carry out detailed simulation and optimization study. After nearly a century of development, the complex process has a relatively complete device technology and experience, but still need to continue to improve its accuracy.Based on the systematic review and generalization of the relevant directions,the reaction-regeneration system of FCC is studied, and its modeling optimization and steady-state simulation are carried out. The following is the main work:(1) In the reactor - regeneration system, the kinetic equation of the reaction based on standard pseudo-component is established, so as to establish the mathematical model of the quasi-steady-state assumptions. The factors influencing the carbon and hydrogen ratio in the regenerative model of the regenerator are studied, the relationship establishment with the variables that affect its change. The steady state mathematical model of the regenerator is established in the dense phase and the dilute phase.(2) Using the sequential module method to calculate the whole reaction -regeneration system, according to the actual industrial production data of Jiujiang Petrochemical, the mathematical model is tested and verified. In the solution, the coke content in the original two segments is decomposed into carbon and hydrogen, making the result more intuitive and accurate.The maximum error of the oil and gas yield at the outlet of the riser is less than 0.5%, the temperature error at the outlet is less than 5 ?; The mole fraction error of each component in the flue gas outlet of the regenerator is less than 0.4%, and the regeneration catalyst temperature and flue gas temperature error is less than 3 ?.(3) Determine the system a number of major input and output variables,in the case of a fixed portion of the operation amount, the effect of Air / Oil and COR was studied, including the rate and temperature of the oil and gas of the riser, the flue gas distribution and temperature of the regenerator, and the temperature and the flow rate of the regenerated catalyst. The strong coupling between the variables in the reaction-regeneration system was found by analyzing the steady-state properties.