Fluidized bed gasification ash separation and removal

Details Fluidized bed gasification ash separation and removal Fluidized bed gasification ash separation and removal

C - Chemistry, Metallurgy

10

J

48/37, 48/8

C10J 3/56 (2006.01) B01J 8/00 (2006.01) B01J 8/24 (2006.01) B01J 8/44 (2006.01) C10J 3/52 (2006.01) C10J 3/54 (2006.01)

Patent

CA 1185794

ABSTRACT OF THE DISCLOSURE Method and apparatus for production of a com- bustible product gas from particulate coal in a fluidized bed system. A vertically positioned vessel includes an enlarged upper section and a smaller diameter cylindrical lower separator section, of diameter d, bounded at the bottom by a perforated or porous conical distribution plate of shallow angle with respect to horizontal. Solids are injected upwardly into or at the top of the separator section through tubular inlets terminating a distance ? above the distributor plate. The ratio ?/d is less than 2.5. A cool fluidizing gas is injected into the separator section through the distributor plate, maintaining fluidization velocity in the separator section of about 1.2 Umf. Char and ash prticles are separated in the separator section, agqlomerated ash being withdrawn from the bottom of the lower separator section and char being recycled to the combustion jet above the top of the tub- ular inlets.

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