Fluidized bed system

Details Fluidized bed system Fluidized bed system

B - Operations, Transporting

01

J

23/423

B01J 8/44 (2006.01) B01J 8/34 (2006.01) C10J 3/56 (2006.01) F22B 31/00 (2006.01) F23C 10/20 (2006.01) F23L 9/00 (2006.01)

Patent

CA 1324881

ABSTRACT OF THE DISCLOSURE: A fluidized bed system comprises a fluidized bed reactor, a solids separator and a return line and serves to carry out exothermic processes in a circulating fluidized bed. The system comprises lines for supplying oxygen- containing primary gases through the bottom of the fluidized bed reactor, lines for supplying oxygen-containing secondary gases on a level which is at least 1 meter above the bottom of the reactor but not in excess of 30% of the height of the reactor, and a fuel line, which opens into the fluidized bed reactor between the primary and secondary gas inlet means. In order to ensure a satisfactory transverse mixing of the oxygen-containing secondary gas and fuel particularly in reactors having large dimensions, the fluidized bed system is provided with one or more displacing body which covers or cover 40 to 75% of the bottom surface area of the fluidized bed reactor and has or have a maximum height that is equal to one-half of the height of the fluidized-bed reactor. The displacing body or bodies is or are preferably provided with means for supplying oxygen-containing secondary gases and/or have an upwardly decreasing cross-sectional area.

559485

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