Controlling a regeneration of fluidized particles or catalysts

Abstract

Abstract Method and apparatus for regenerating at elevated temperature at fluidized mass of particles, e.g., a catalyst used in treatment of hydrocarbons, e.g., fluidized catalysts cracking of oil, are disclosed. Several operations can be effected, each of them alone or in various combinations. An operation basic to the overall operation, always effected, is the continuous circulation of dense phase particles undergoing regeneration from a dense phase or fluidized regeneration zone or vessel to a hot surge zone or vessel and from the latter back into the dense phase bed in the regeneration zone. Used catalyst can be in part passed to hot surge zone whenever it is tending to cause undue temperature rise in the regeneration zone. Fresh or unused catalyst can be fed to the regeneration zone continuously or intermittently responsive to sensed temperature change in said zone and/or to said hot surge zone. A temperature sensing controller station resets a level controller, controlling regeneration zone dense phase bed level by controlling the several possible flows or combinations thereof.

Inventors

• 👤 Carl S. Kelley

Bibliographic Details