Method for removal of sulfur from coal in stoker furnaces

Details Method for removal of sulfur from coal in stoker furnaces Method for removal of sulfur from coal in stoker furnaces

1978-11-29

1979-11-06

Dees, Carl F.

Fuel and related compositions

Liquid fuels

Aluminum or heavy metal, other than lead, containing

44 5, 44 26, 110342, 110345, C10L 910

Patent

active

041734548

ABSTRACT:
A low-cost method of taking sulfur out of coal in stoker furnaces comprising mixing the coal with natural-occurring flue dust from steel-making, pulverized red mud from aluminum-making, of pulverized retort residues from zinc-making, or a pulverized prepared material comprising principally the ferrites and oxides of certain minerals and at least a trace of ferric oxide as a catalyst for accelerating the conversion of sulfur dioxide to sulfur trioxide and heating the mixture in the combustion zone of the furnace in the presence of water vapor from the fuel to form sulfuric acid for oxidizing said natural-occurring or prepared sulfur dioxide absorbent materials into sulfates and precipitating the same along with ash in the fuel to the bottom of the furnace.

REFERENCES:
patent: 2473987 (1949-06-01), Brandon
patent: 2800172 (1957-07-01), Romer et al.
patent: 2956868 (1960-10-01), Burgess
patent: 3823676 (1974-07-01), Cook et al.
patent: 3949684 (1976-04-01), Copeland
patent: 3983218 (1976-09-01), Heins

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