Gasifying coal or coke and discharging ash agglomerates

Details Gasifying coal or coke and discharging ash agglomerates Gasifying coal or coke and discharging ash agglomerates

1974-10-07

1976-05-18

Scovronek, Joseph

Gas: heating and illuminating

Generators

Cupola

48 63, 48 76, 48 77, 48 78, 48203, 48206, 48210, 252373, 252375, C10J 320, C10J 342, C10J 346, C10J 354

Patent

active

039574571

ABSTRACT:
Granulated coals or cokes derived from coal, in sizes up to about 3/4 inch and containing ash matter with an initial deformation temperature above about 2,300.degree.F, are fed to a slow fluidized bed comprising relatively large particles of coke intermingled with roughly spherical ash agglomerates, maintained at about 2,050.degree.F to 2,650.degree.F, and supplied with a gasification medium, for example, steam mixed with oxygen or air. A fast fluidized bed of coke fines is superposed above the slow bed and is contiguous therewith. Gasification products are discharged together with relatively fine particles of coke, which are collected and returned to the fast bed. Ash agglomerates are withdrawn from the bottom of the slow bed via a standpipe leading to a mechanical grate. An oxidizing medium is introduced below the grate to consume coke particles that accompany the ash agglomerates entering the standpipe.

REFERENCES:
patent: 1840649 (1932-01-01), Winkler et al.
patent: 2111579 (1938-03-01), Winkler et al.
patent: 3840353 (1974-10-01), Squires

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