FCC spent catalyst distributor
First Claim
1. An apparatus for distributing spent catalyst into a fluidized catalytic cracking regenerator, said apparatus comprising:
- a fluidized hopper to collect catalyst;
an air distributor located at the bottom of the hopper having one or more nozzles to provide regeneration air as fluidization gas and provide a hydraulic head to assist catalyst flow; and
a horizontally extended header in communication with the hopper having a plurality of horizontally extended outlet arms for distributing catalyst near the top of the catalyst bed within the regenerator.
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Abstract
An distributor arrangement introduces spent FCC catalyst more uniformly across the dense bed of the regenerator to provide more even contact with regeneration gas in order to avoid hot spots and zones of incomplete combustion. The invention forms a fluidized hopper to collect spent catalyst and a horizontally extended header with multiple horizontally extended outlet arms to place catalyst into the regenerator. The invention may use an aeration means to fluidize the header to further assist catalyst flow. Furthermore, the spent catalyst delivered to the top of the regenerator dense reduces NOx emissions in the flue gas.
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Citations
12 Claims
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1. An apparatus for distributing spent catalyst into a fluidized catalytic cracking regenerator, said apparatus comprising:
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a fluidized hopper to collect catalyst;
an air distributor located at the bottom of the hopper having one or more nozzles to provide regeneration air as fluidization gas and provide a hydraulic head to assist catalyst flow; and
a horizontally extended header in communication with the hopper having a plurality of horizontally extended outlet arms for distributing catalyst near the top of the catalyst bed within the regenerator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for distributing spent catalyst into a fluidized catalytic cracking regenerator having a spent catalyst standpipe for receiving spent catalyst from a stripper and an air distribution system at a lower end of the regenerator for distributing regeneration air into a bed of the catalyst for burning coke on the catalyst and for fluidizing the catalyst, said apparatus comprising:
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a fluidized hopper to collect catalyst from the spent catalyst standpipe;
an air distributor located at the bottom of the hopper having one or more nozzles to provide regeneration air as fluidization gas and provide a hydraulic head to assist catalyst flow; and
a horizontally extended header in communication with the hopper having a plurality of horizontally extended outlet arms for distributing catalyst near the top of the catalyst bed within the regenerator, the header being fixed with respect to the wall of the regenerator. - View Dependent Claims (11, 12)
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Specification