Patent ID: 7081229

Claim:
Termination for second stage cyclone diplegs, that operate in series in separating vessels or regenerators of fluid catalytic cracking (FCC) converters for causing a reversal in pressure profile so that the pressure in the outlet of the cyclone dipleg is higher than the pressure of the separator vessel or regenerator to prevent a reverse flow of a gas stream originating from inside of the separator vessel or regenerator towards the inside of the cyclone dipleg, the termination including: a sealing device connected to the distal end of a second stage cyclone dipleg; a collector vessel, inside of which the distal end of the second stage cyclone dipleg is disposed, the collector vessel being substantially cylindrical in its upper part, from which, in the lower part, a cone shaped body extends that, in turn, is connected to a collector vessel dipleg; a venturi type nozzle installed on the inside of the collector vessel dipleg adjacent to an outlet of the collector vessel dipleg; an injector for the purpose of injecting a fluid, which is connected to the inside wall of the collector vessel dipleg, immediately above the venturi; tube for transporting a fluid, linked by one of its ends to a heater and with the other end bifurcated into two tubes, the first tube, entering the top of the collector vessel and having its free end positioned above the sealing valve of the cyclone dipleg and the second tube linking to the injector.