Utilization of low grade fuels

Details Utilization of low grade fuels Utilization of low grade fuels

1985-12-04

1987-10-20

Dority, Jr., Carroll B.

Furnaces

Process

Burning pulverized fuel

110245, 201 31, 201 27, F23D 100

Patent

active

047006390

ABSTRACT:
There is provided a process and reaction system for the highly efficient utilization of solid fuels with a low content of organic matter, which may have a high sulfur content and a high mineral carbonate content. Carbonate decomposition is minimized and most of the sulfur is removed from the resulting ash which can be used to make construction materials. The process is effected in 3 stages, the first two of these comprising fluidized bed operation. In the first stage pyrolysis, gasification and only partial oxidation of organic matter takes place, in the second stage combustion of residual carbon is effected in the presence of an excess of air. In the third stage the streams of combustible material coming from the first two stages are combusted. Among suitable dilute solid fuels there are low grade oil shales. The operating conditions have to be adjusted according to the nature of the solid fuel type.

REFERENCES:
patent: 2579397 (1951-12-01), Roetheli
patent: 2579398 (1951-12-01), Roetheli
patent: 4026679 (1977-05-01), Collin
patent: 4253409 (1981-03-01), Wormser
patent: 4262610 (1981-04-01), Hein et al.
patent: 4435148 (1984-03-01), Moss
patent: 4447297 (1984-05-01), Shang et al.
patent: 4548138 (1985-10-01), Korenberg
patent: 4594967 (1986-06-01), Wolowodiuk

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