Operating method

Details Operating method Operating method

B - Operations, Transporting

01

J

110/15, 23/370

B01J 8/18 (2006.01) B01J 8/32 (2006.01) B01J 8/38 (2006.01) F22B 31/00 (2006.01) F23C 10/10 (2006.01) F27B 15/00 (2006.01)

Patent

CA 1069276

ABSTRACT A method of operating a fluidized bed system, typically as a combustor system for power or steam generation by burning high-sulfer coal, which comprises forming an entrained fluidized bed in a first space region contianing a first solid bed particle component, such as a hematite ore containing over 90% Fe203, or limestone, forming in a more limited space region within the first region a dense fluidized bed containing a second solid bed particle component, such as larger particles of the hematite, essentially comprising a material having long-term physical and chemical stability in the fluidized bed system so as to be sub- stantially non-agglomerating and not subject to substantial attrition therein, providing a recirculation path such as through a cyclone separator and a particle reservoir for the first particle component from the first space region through the dense fluidized bed in the more limited space region, and operating the fluidized bed system at a velocity such that the second component particles are effectively retained in the dense fluidized bed in the more limited space region, whereas the first component particles re- circulate and interpenetrate therethrough, commingling with the second component particles. -1-

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