Solid fuel use in small furnaces
A description is given of a method for producing a solid fuel for small furnaces in powder form or in briquette form which has: (A) a uniform heat content of approximately 12,000-14,000 Btu per pound, (B) a sulfur content that is balanced with a scavenger for SO2 gas to enable stack gases from said small furnaces to meet EPA emission standards for SO2, (C) an ash that is soft, pliable, and non-sticking and that does not form ''clinkers'' while burning, (D) no tendency during normal storage conditions to undergo spontaneous combustion or auto-ignition, (E) adequate flow properties so that said fuel in powder form maintains fluidity and does not stick in the delivery system therefor, (F) insignificant tendency to pick up moisture during transportation or storage, (G) excellent ignition properties during cold weathertstarting in a cold furnace, and (H) excellent combustion properties for reducing carbon monoxide emission and soot formationoand for improved heat recovery, which comprises the following steps: A. Grinding a coal or mixture of coals having a heating value of about 12,000 to 14,000 Btu to a fineness below 200 mesh; B. Drying the coal or coals with a hot gas, which is at 150/sup 0/ to 800/sup 0/F and contains a trace amount of oxygen, to a dried moisture content of 1-15%; C. Blending the coal or coals with at least one additive selected from each group set forth below; (1) an SO2 scavenger for minimizing the effects of sulfur in said coal slected from the group consisting of limestone, lime, dolomite, gypsum, calcium phosphate, bauxite, and mixtures thereof, (2) a combustion improver and ash modifier for imparting burning properties and for reducing corrosion, fouling and ash slagging, selected from the group consisting of manganese dioxide,iron oxide, and manganese nodules.
- Assignee:
- Mobil Corp
- Patent Number(s):
- US 4210423
- OSTI ID:
- 5122661
- Resource Relation:
- Patent File Date: Filed date 6 Apr 1979
- Country of Publication:
- United States
- Language:
- English
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