초록 ▼

A method of introducing oxygen-containing gas into a fluidized bed of cracking catalyst particles through a plurality of nozzles which are arranged in the underside portion of the catalyst bed. One aspect of the invention comprises positioning at least one of a plurality of nozzles, used in the flui

A method of introducing oxygen-containing gas into a fluidized bed of cracking catalyst particles through a plurality of nozzles which are arranged in the underside portion of the catalyst bed. One aspect of the invention comprises positioning at least one of a plurality of nozzles, used in the fluidized bed, substantially vertically downward. Another aspect of the invention comprises installing at least one nozzle with a length greater than the diameter of a header pipe which supplies the plurality of nozzles. In yet other aspects of the invention comprises installing at least one of the nozzles with a beveled tip, and installing at least one nozzle with a baffle on its tip.

대표청구항 ▼

In a process for regenerating a cracking catalyst by introducing an oxygen-containing gas into a fluidized bed of cracking catalyst particles through a plurality of nozzles arranged on the sidewalls of a generally horizontally positioned grid of supply lines, wherein each one of the plurality of noz

In a process for regenerating a cracking catalyst by introducing an oxygen-containing gas into a fluidized bed of cracking catalyst particles through a plurality of nozzles arranged on the sidewalls of a generally horizontally positioned grid of supply lines, wherein each one of the plurality of nozzles has a length which is less than the outside diameter of the supply line, the improvement comprising introducing the oxygen containing gas into the fluidized bed through a nozzle arrangement wherein a minor portion of the plurality of nozzles on the sidewalls of the grid of the supply lines have a length greater than the outside diameter of the supply lines and a major portion of the plurality of nozzles on the sidewalls of the grid of the supply lines have a length less than the outside diameter of the supply lines.