Patent ID: 7153478

Claim:
A downflow catalytic cracking reactor, comprising the following components: a catalyst delivery pipe ( 1 ), a reactor top cover ( 2 ), a feed nozzle ( 3 ), a reactor vessel ( 6 ), a downflow reaction pipe ( 9 ), the upper end of the reactor vessel is close connected to the top cover ( 2 ) along the direction of circumference; the bottom of the reactor is close connected to the outer wall of the downflow reaction pipe; the upper section of the downflow reaction pipe is located inside the reactor vessel, the lower section of the downflow reaction pipe extends from the bottom of the reactor vessel; feed nozzle ( 3 ) is located on the top cover and/or side wall of the reactor vessel ( 6 ), the outlet of the feed nozzle being above the inlet of the downflow reaction pipe; a catalyst delivery pipe ( 1 ) is fixedly joined to the reaction vessel and is in communication with a catalyst lifting zone ( 7 ) formed by the reactor vessel and the downflow reaction pipe.