Patent ID: 6346219
Filing Date: 2002-02-12
Classification: C10G,F16K,Y10T

Abstract:
An apparatus for contacting fluidizable particles with a fluid feed, said apparatus comprising:an elongated riser conduit having an upper downstream end and a lower upstream end that defines a fluidized catalyst inlet; at least one feed conduit having an outlet surface at least partially defining a restricted fluid opening and establishing a flow path for a fluid feed into an upstream portion of the riser wherein the fluid feed passes from a feed conduit inlet through a dispersion device and out of the feed conduit through the restricted fluid opening; and a flow actuated plug which moves into contact with the restricted fluid opening of the outlet surface of the at least one feed conduit to inhibit flow of fluidizable particles when fluid flow through the feed conduit drops below a predetermined level and which moves out of contact with the restricted fluid opening in the presence of fluid flow through the feed conduit, the restricted fluid opening comprising a venturi with a lower portion of the flow actuated plug having a shape matching a portion of the venturi such that, in the presence of fluid flow, the venturi disperses the feed, through shearing action, in the form of fine droplets, into the fluidizable catalyst.