Prevention of defluidization in the treatment of caking carbonac

Details Prevention of defluidization in the treatment of caking carbonac Prevention of defluidization in the treatment of caking carbonac

1978-09-18

1980-04-29

Richman, Barry S.

Distillation: processes, thermolytic

And surface treating material to reduce or prevent...

48210, 201 22, 201 28, 201 31, 208 8R, 208127, 208137, 208157, C10B 5708, C10B 4724, C10B 4910, C10B 4922

Patent

active

042004950

ABSTRACT:
In the introduction of fresh carbonaceous particles into a fluid-bed reaction zone at injection velocities in excess of 20 ft/sec, a shroud gas is passed through a shroud passage on the injection nozzle at a velocity in excess of about 750 ft/sec, preferably at from about 1,000 to about 5,000 ft/sec, in sufficient quantities to supply a substantial portion of the overall energy input into the reaction zone for dispersion of the fresh particles and for breaking up of any agglomerates formed upon injection of the fresh particles into the reaction zone. By accommodating the agglomerating tendencies of the fresh feed material, the high energy shroud gas effectively contributes to the prevention of defluidization of the bed. The shroud gas may be inert or may comprise a gaseous reagent that reacts with the fresh carbonaceous particles in the reaction zone. The energy supplied by the shroud gas desirably is at least about 80% of said energy input to the reaction zone.

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