SECOND STAGE CYCLONE DIPLEG TERMINATION DEVICE IN FCC UNITS.

摘要

The concept of the present invention is mainly applicable to cyclones in series that operate under conditions in which the pressure in the top of the cyclone dipleg is lower than the external pressure where fine particulate matter is collected and discharged. The second stage cyclone dipleg termination device is described that operates in a separator vessel (2) or a vessel of the regenerator of a fluid catalytic cracking (FCC) converter with the capability to reverse the pressure conditions commonly found in this type of equipment. One end of a cyclone dipleg (7) is joined to a collector vessel (11), in such a way that a portion of the dipleg (7) enters into the inside of the collector vessel (11). The end of the dipleg (7) of the cyclone is connected to the conventional, normally used sealing device (17) in second stage cyclone (4) diplegs (7). The collector vessel (11), in turn, has on its bottom an outlet in the form of the dipleg (14). On the inside of this outlet an injector devi ce is introduced (16) through which a fluid under high pressure is discharged, associated with a "venturi" type nozzle (15), which moves or drags the particulate matter discharged by the dipleg (7) of the cyclone (4) through the sealing valves (17), inside the collector vessel (11) to the exterior of the collector vessel (11).