B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
23/422, 252/1.E
B01J 8/24 (2006.01) B01J 37/14 (2006.01) C10J 3/48 (2006.01)
Patent
CA 1095876
Abstract of the Disclosure A catalyst regenerator is disclosed which incorporates a closed vessel having a centered stand pipe concentrically arranged within a spent catalyst distributor. The catalyst is carried upwardly by the distributor and is scattered evenly and concentrically about the distributor. The spent catalyst is deposited on or near top of the dense phase catalyst be. A symmetrically arranged, preferably trianglar fresh air distribu- tor system includind a number of transverse brances having small nozzles mounted thereon forms a grid pattern below the lower portions of the catalyst bed in the regenerator Air for burning of the coke on the spent catalyst is introduced evenly to minimize the size of the air bubbles in the dense bed. The catalyst in the lower portions of the bed has a minimum of coke remaining thereon. The oxygen of the air whlch is lntroduced ln the lower portlons of the bed is consumed by combustion of the reduced quantity of coke in the lower portions of the bed. As the air flows through the dense bed to the upper surface, the catalyst encountered at the higher levels has more coke on it. However, the air is partly depleted of oxyeen which prevents formation of excluslve particle temperatures in the dense phase fluid bed. The region of high coke concentration experiences controlled burned achieved by controlled partial oxygen deple- tion. This tends to burn more of the carbon in the bed, thereby reducing afterburning ln the dilute phase abovo the bed. This provided uniform heating of the catalyst to a higher temperature, thereby reducing the heat required in the feed back pre-heater. Carbon monoxide disposal euipment is also eliminated by consump- tion of most of the carbon monoxide within the bed, all without afterburning thereabove. A method is also disclosed.
289002
Murcia Alvaro A.
Murphy James R.
Kirby Eades Gale Baker
Pullman Incorporated
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