Fluidized cracking catalyst regeneration apparatus

Fluidized catalytic regeneration apparatus, which comprises:

• a. a vertical regenerator vessel 100 comprising a cylindrical lower regenerator section 101 having a closed bottom and open top, a cylindrical upper regenerator section 102 having an open top and an axially centered opening in the bottom for communication with the open top of lower regenerator section 101, a frusto-conic transition section 103 having an open top and an open bottom for communication with the open top of upper regenerator section 102, and a cylindrical dilute phase regenerator section 104 having a closed top and an open bottom for communication with the open top of transition section 103;
• b. spent catalyst conduit means 105 having a discharge end for transferring coke-contaminated spent catalyst from a reaction zone substantially vertically downward into about the axial center of lower regenerator section 101;
• c. spent catalyst distribution means 109 for distributing spent catalyst from the discharge of said spent catalyst conduit means 105 radially into lower regenerator section 101;
• d. primary regeneration gas distribution means 107 for distributing an oxygen containing primary regeneration gas radially into the bottom portion of lower regenerator section 101 under turbulent conditions such that spent catalyst and primary regeneration gas are intimately mixed at catalyst regeneration conditions;
• e. secondary regeneration gas distribution means 110 for radially distributing an oxygen containing regeneration gas into the bottom of upper regenerator section 102 such that an intimate mixture of spent catalyst and primary regeneration gas flowing upoward into upper regenerator section 102 from lower regenerator section 101 forms a fluidized dense phase bed of catalyst at regeneration conditions;
• f. a regenerated catalyst duct 113 in communication with the interior of upper regenerator section 102 for withdrawing regenerated catalyst from the upper portion of said fluidized dense phase catalyst bed;
• g. a regenerated catalyst standpipe 114 located exterior to reactor vessel 100 and in communication with the discharge or regenerated catalyst duct 113;
• h. a deaeration gas line 69 communicating from the top of regenerated catalyst standpipe 114 to dilute phase regenerator section 104
• i. catalyst gas separation means 118 for separating catalyst and spent regeneration gas from a dilute phase of catalyst suspended in regeneration gas within said dilute phase regenerator section 104;
• j. vent means 122 in communication with said catalyst-gas separation means 118 for removing separated spent regeneration gas from said regenerator vesel 100;
• and
• k. a conduit means 119 for transferring separated catalyst from catalyst-gas separation means 118 to lower regenerator section 101.