Two-stage countercurrent fluid-solid contacting process

Abstract

Abstract An upflow fluid-solid contacting process in which the overall flow of solid particles is in a downward direction while the overall flow of fluids contacting the solids is in an upflow direction. The process specifically is defined as a two-stage fluid-solid contacting process in which fresh solids are added to a contacting zone at a top portion of the zone with spent solid particles removed from a lower section of the contacting zone. In the lower section of the contacting zone there is introduced a first fluid stream which passes in a countercurrent manner and in an upflow direction through the lower section. The effluent from that zone meets with a second feed fluid and passes into an upper section of the contacting zone. The processing flow in the upper section of the contacting zone is in an essentially lateral direction normal to the overall fluid flow in the lower section. More specifically, the fluid flow in the upper section is into a radial flow contacting zone where upon the fluids contact descending solids by passing in a horizontal manner to an outer shell and out of the upper section. The process flow is applicable to general fluid-solid contacting processes and fluid-solid conversion processes such as hydrocracking or naphtha cracking to substitute natural gas products.

Inventors

• 👤 D Ward

Bibliographic Details