| 摘要 |
In 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 14 maintained at a temperature of 482-760 DEG C (900-1400 DEG F) for cracking reactions, and resulting tars and coke are deposited on and within a particulate carrier material 17 therein. The carrier material descends through a stripping zone 18 to remove tars and then into a lower fluidized bed gasification zone 20, which is maintained at a temperature of 927-1093 DEG C (1700-2000 DEG F) by O2-containing gas and steam introduced therein at 22 to gasify the coke and produce a reducing gas. The stripping zone 18 contains coarse packing material 19 which is supported by a refractory annular- shaped grid 34. The decoked hot particulate carrier is recirculated by a transport gas supplied at 24, upwardly through a central refractory-lined conduit 28 to the upper bed. Such recycle of the carrier solids is controlled by a refractory-lined gas- cooled valve 50. <IMAGE> |
