Multi-zone process and reactor for cracking heavy...

Details Multi-zone process and reactor for cracking heavy... Multi-zone process and reactor for cracking heavy...

C - Chemistry, Metallurgy

10

G

196/106

C10G 11/18 (2006.01) B01J 8/28 (2006.01) C10G 9/32 (2006.01)

Patent

CA 1214422

ABSTRACT A multiple-zone fluidized bed conversion process and apparatus for producing light distillate liquid and fuel gas products from heavy hydrocarbon feedstocks. The feedstock is introduced into an upper fluidized bed cracking zone maintained at a temperature of 900-1400°F for cracking reactions, and resulting tars and coke are deposited on and within a particulate carrier material therein. The carrier material descends through a stripping zone to remove tars and then into a lower fluidized bed gasification zone, which is maintained at a temperature of 1700--2000°F by 02-containing gas and steam introduced therein to gasify the coke and produce a reducing gas. The stripping zone contains coarse packing material which is supported by a refractory annular-shaped grid. The decoked hot particulate carrier is recirculated by a transport gas upwardly through a central refractory-lined conduit to the upper bed. Such recycle of the carrier solids is controlled by a refractory-lined gas-cooled valve.

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