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Stoker Classification
Coal stokers can classified on basis of their coal burning capacity
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According ASHRAE coal stokers for automatic feeding fuel to a furnace can be classified after their coal burning capacity:
- Class 1 Stokers - 10 to 100 lbs (4.5 to 45 kg) coal per hour
- Class 2 Stokers - 100 to 300 lbs (4.5 to 135 kg) per hour
- Class 3 Stokers - 300 to 1200 lbs (135 to 540 kg) per hour
- Class 4 Stokers - more than 1200 lbs (more than 540 kg) per hour
Bituminous coal with an ash fusion temperature of 2200oF to 2600oF is ideal for stoker operations.
Depending on the construction of the stoker the size of the coal should be between 1 1/4-inch to 3/4-inch.
Oil treatment of the coal is quite common to reduce the dust problem. Oil treatment of the coal also adds lifetime to mechanical conveyers, feed screws etc.
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Related Topics
- Combustion - Boiler house topics - fuels like oil, gas, coal, wood - chimneys, safety valves, tanks - combustion efficiency
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Related Documents
- ASHRAE - American Society of Heating, Refrigerating and Air-Conditioning Engineers - ASHRAE Standards
- Anthracite Coal - Anthracite coal is available in standardized sizes
- Classification of Coal - Classification of coal based on volatile matter and cooking power of clean material
