| 摘要 |
A system for removal of tramp or trash material from a single fluidized bed contained within a single vessel used to incinerate or pyrolyze solid fuel, the system comprises a gently sloped, skewed or serpentine stationary bed support and air distributor structure which distributes air in a fashion so as to uniformly fluidize a shallow bed of variable depth across the slope thereof without internally circulating the bed, and at the same time cause non-combustible tramp or trash material (e.g. pieces of steel, rocks, clumps, etc.), to be removed from the bed without passing to a location either above or beneath the bed. The angle of slope is strictly controlled. During periods of non-fluidization and/or non-use, the bed material is kept from falling into the air distribution plenum below the bed support structure by hollow bed containment structure disposed at sites below the bed support structure. Fluidizing air and gravity alone gently walk tramp material downwardly along the top of the bed support structure toward a discharge site. Although the discharge of fluidized air through the grid plate into the bed may be non-vertical, the horizontal component of said air discharge is immediately dissipated and the bed turbulence or direction of fluidization is essentially vertical. The sizing and spacing of air distributor holes may be varied in respect to any sloped grid plate to provide for proper and uniform fluidization across the bed having non-uniform depth without causing rotational mixing within the bed.
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