关键词: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">催化裂化装置, 原料, SZorb装置, 结焦, 汽油烯烃, 化学清洗

Abstract: The FCC unit is closely related to its upstream and downstream units, especially for single-series refineries, the change of the working condition of the upstream unit will have a significant impact on the production and operation of the downstream unit. During the catalyst replacement period of the residue hydrogenation unit, the FCC unit blended vacuum residue, resulting in severe deterioration of the properties of the FCC feedstock. The increase of vanadium content in the feedstock led to a decrease in the activity of the equilibrium catalyst and an increase in the olefin content of the FCC gasoline, causing the heat exchanger group E101 in the SZorb unit to coke rapidly and affecting its operation. Therefore, during the catalyst replacement period of the residue hydrogenation unit, it is recommended to purchase light paraffin-based crude oil with low sulfur and metal content in advance to alleviate the vanadium poisoning of the FCC unit catalyst; try to increase the catalyst consumption of the FCC unit to over 2.0 kg/t to prevent excessive vanadium content in the equilibrium catalyst; if E101 is rapidly coking and has caused an excessive pressure drop, chemical cleaning can be used to clean the coke in the E101 tube pass.

Key words: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">FCC unit, feedstock, SZorb unit, coking, gasoline olefins, chemical cleaning