关键词: 催化裂化, 吸收, 解吸, 传质, 节能, 改进

Abstract: Process simulation of the mass transfer of absorption-desorption system in FCC unit was carried out for energy conservation. Results showed that dual direction mass transfer, which was similar with the fractionation operation, existed in the separation process of absorption-desorption system. Thus a new energy-saving absorption-desorption process, a combination of an absorption/cooling tower and an absorption/desorption tower, was proposed. The simulation results showed that as compared with the present double-tower process with heating at the middle, the total energy consumption of the new process could reduce more than 15%.

Key words: catalytic cracking, absorption, desorption, mass transfer, energy saving, improvement