Patent ID: 6652736
Filing Date: 2003-11-25
Classification: C10G

Abstract:
Method for stripping hydrocarbon-impregnated solid particles in a fluidized bed by means of a fluid circulating against the flow direction of these particles, implemented in a housing comprising in its upper section a diluted fluidized zone where the particles to be stripped arrive, and in its lower section a dense fluidized bed zone comprising at least two chambers arranged basically adjacent, each of these chambers having separate means for inserting solid particles, and in its lower section, separate means for inserting gaseous stripping fluids, this method being characterizedin that the solid particles arriving from this diluted fluidized zone are directed by a directing means toward the entrance of the first chamber without being able to directly enter the second chamber; in that the solid particles to be stripped enter the first chamber in their entirety first of all by way of the upper section of the dense fluidized bed, in which they undergo a first stripping; in that the solid particles having undergone this first stripping are then transferred into at least a second chamber which has in its upper section gas/solid separating means allowing the gaseous fluids from the stripping of the second chamber to pass directly from the bottom to the top, into the diluted fluidized zone located in the upper section of the housing; and in that the solid particles having undergone a second stripping in the second chamber are then removed by way of the lower section of this second chamber.