FLUID COKING PROCESS

摘要

A fluid coking process is operated in a fluidized bed coking reactor in which a plurality of heavy oil inlet nozzles are arranged in a number of rings around the periphery of the dense bed reaction section at vertically spaced elevations. A heavy oil feed is injected with atomization steam through the nozzles into the fluidized. bed, operating at a lower steam-to-oil ratio for the upper ring or rings of nozzles than for the lower ring or rings.

主权项

1. In a fluid coking method operated in fluidized bed coking reactor having (i) a dense bed reaction section of circular horizontal cross-section about a vertical axis and confined by a reactor wall and (ii) a plurality of heavy oil inlet nozzles located in the dense bed reaction section and arranged in rings around the periphery of the reactor wall in the reaction section at vertically spaced elevations by means of which a heavy oil feed is injected into a fluidized bed in the dense bed reaction section to thermally crack the feed to form solid coke and vaporous cracking products, the improvement comprising:
injecting the heavy oil feed into the fluidized bed from the upper ring or rings of nozzles at a lower steam-to-oil ratio than from the lower ring or rings of nozzles.