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AssigneeMitsubishi Jukogyo Kabushiki Kaisha
InventorsKeisuke Sonoda, Yoshinori Kobayashi, Fumiya Nakashima, Kimishiro Tokuda
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In order to stably maintain a combustion capability in a combustion furnace for coal gassification, it is necessary to exhaust molten slag produced within the furnace without the slag stagnating. The present invention provides, in a combustion furnace for coal gassification, a slag exhausting device which is configured in such a manner that the cooling of molten slag being exhausted from the furnace is minimized to prevent the slag from solidifying and causing other slag to stagnate. The slag exhausting device is disposed at the center of a bottom wall of the combustor, and has a lower cylindrical portion and an upper bank opening upwardly and flared at an angle of 300.degree.-45.degree.. The height H from the bottom wall to the top of the upper bank, a height L and an inner diameter ds of the cylindrical lower portion and a diameter D of the combustor are set to satisfy the relations of ds/D=0.2-0.4, L/ds=0.2-0.6 and H/D=0.05-0.15.
In a coal combustor in which coal is burnt while swirling, and an ash content of the coal is blown against a peripheral wall of a combustion chamber of the combustor due to centrifugal forces and drops to a bottom wall of the combustion chamber, a slag exhausting device disposed at the bottom wall of the combustion chamber, said slag exhausting device comprising:
A slag exhausting device disposed at the center of the bottom wall of a coal combustion furnace said device comprising:
Dependencies are inferred from the claim text.