Chemistry of inorganic compounds – Miscellaneous process
Patent
1990-07-02
1992-03-24
Straub, Gary P.
Chemistry of inorganic compounds
Miscellaneous process
422129, 422220, 2395331, B01J 802
Patent
active
050986902
ABSTRACT:
A method for gas solids contacting uses a two direction distributor to prevent bed surface disturbances at high inlet velocities and high particle loadings. The distributor uses a series of partitions to peel off portions of the downward gas flow and redirect them radially outward. Each outwardly directed gas flow component passes through a series of perforations to effect any necessary circumferential redistribution before entering the space above the particle bed. By subdividing the gas flow into a number of radially directed flow portions and circumferentially redistributing these flow portions, cross-currents and eddy currents on the catalyst bed surface are minimized or avoided so that disturbances at the bed surface are eliminated. This distributor is particularly effective in vessels having particles loaded to within a short distance of bed inlets and where elbows or other upstream flow devices introduce nonuniformities into the gas flow to a particle bed. The distributor has a simple arrangement and can be used without adding significant pressure drop to the system.
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patent: 4938422 (1990-07-01), Koves
McBride Thomas K.
Straub Gary P.
Tolomei John G.
UOP
Vanoy Timothy C.
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