Abstract: In order to solve the problem of complex and difficult to optimize the operation of staked two-stage regeneration system in FCC unit, a model of staked two-stage regeneration system was established, and the simulation of the regeneration system was carried out. The results show that it is more advantageous for the first regenerator to use lower amount of main air to obtain better regeneration effect when the total amount of main air is constant. For the staked two-stage regeneration unit, under the optimized operating conditions, the total main air consumption is 9.5m³ per kilogram of coke, which can make the carbon content of the regeneration agent lower than 0.05%.

Key words: catalytic cracking, regeneration, staked, modeling, simulation