Grate for coal gasifier
AssigneeGeneral Electric Company
InventorDonald E. Woodmansee
Life of this patent
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Abstract
Symmetrical stepped grate/rabble arm combinations for use in a fixed bed coal gasifier are shown in which the stepped grates comprise step plates having in combination threwith means for controlling the rate of discharge of solids therefrom. The solids discharge controlling means described comprise adjustable mechanical dams at spaced locations along the step plate periphery together with means for the positioning thereof.
Claims10
In an apparatus for producing a fuel gas from coal including a vertical shaft disposed over an enclosed grate whereby coal moving by gravity down said shaft is subjected first, to carbonization, and then, to reduction, the improvement wherein the grate comprises in combination:
- a plurality of fixed plate members generally annular in shape and having different radii, said plates being substantially concentrically disposed in spaced relationship in a vertically and generally conical stacking arrangement defining throat volume, therebetween;
- rotatable means mounted for movement adjacent said plate members for promoting the movement of solids from said shaft to pass over the surfaces of said plates,
- adjustable means mounted on and located at space locations along each plate for varying the restriction to flow of solids through the throat volume thereabove;
- and
- means for controllably positioning said restriction-to-flow varying means.
Dependencies are inferred from the claim text.