Patent ID: 6936227

Claim:
A feed-dispersion system for fluid catalytic cracking units (FCC) for introducing a liquid hydrocarbon feed atomized by an atomization fluid in a reactor for fluid catalytic cracking, wherein said system comprises: a feed injection system made up of two concentric conduits, an inner conduit and an outer conduit of substantially circular section, wherein the atomization fluid is introduced through a first flange and flows through the inner conduit while the liquid hydrocarbon feed is introduced through a second flange and flows through the annular space formed by the outer surface of the inner conduit and the inner surface of the outer conduit; and an atomizing unit comprising nozzles arranged in rows, with a central row formed by the sequence of nozzles connected on one end to the inner conduit of atomization fluid and connected to a mixing chamber on the other end, and by at least one side row formed by the sequence of side nozzles connected on one end to the outer feed conduit and connected to the mixing chamber on the other end, where in this unit: the central nozzle(s) and side nozzle(s) of the said atomizing unit are geometrically placed so as to transfer, by contact, the energy of the atomization fluid to the flow of liquid feed; the mixing chamber is formed by the combination of discharge zones of the central nozzle(s) of atomization fluid; and the feed and atomization fluid are admixed in the mixing chamber and form a homogeneous spray having a fan-like shape which exits the outlet of the mixing chamber in an unobstructed way and in a direction substantially parallel to the symmetry axes of the central nozzles.