关键词: 催化裂化汽油, 烯烃含量, S Zorb装置, 反应进料换热器, 结焦, 反应器过滤器, 压差, 再生剂活性

Abstract:

The influence of the increase of olefin content in FCC gasoline of a company on the feed heat exchanger E101, reactor filter ME101 and other equipment and the adjustment of process parameters of the S Zorb unit is introduced. The mass fraction of olefins in feedstock of this company's S Zorb unit rose from 21.5% to 28.0% in a short period of time, which not only caused serious coking in the tube process of the reaction feed heat exchanger(E101), a significant decrease in heat transfer capacity and intensification of heat exchanger bias flow phenomenon, but also caused the obvious rise of the pressure difference of the reactor filter(ME101) in a short time, which seriously affected the safe operation of the unit. It also caused the aggravation of the loss of octane value. In order to ensure the safe operation of the unit for a long period of time, in view of the coking phenomenon of olefins, optimization suggestions were put forward, such as strengthening the monitoring of feedstocks and key equipment, adjusting the temperature rise of the back-blowing system and reactor in time, and strictly controlling the refining process of post-MTBE C₄.

Key words: FCC gasoline, olefin content, S Zorb unit, reaction feed heat exchanger, coking, reactor filter, differential pressure, regenerant activity