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Converting Waste Agricultural Biomass into a Resource - UNEP

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Detailed Process Description<br />

A. Metering Conveyor<br />

Extra Heavy Duty Screw Conveyor with Variable Frequency AC Drive<br />

B. Rotary Air Lock Valve<br />

Limits Excess Air for Improved Combustion Control, Increased Efficiency and<br />

Emission Control<br />

C. “Frederick” Solid Fuel Stoker<br />

Manufactured since 1918, it is unsurpassed in the dependable stoking of solid<br />

fuels<br />

D. Fuel Pile<br />

The fuel pile, maintained by the stoker, covers all the grates for Improved<br />

Combustion Efficiency and Emission Control.<br />

E. Gasifier<br />

A combination of the “Frederick” stoker, combustion air system, and lower<br />

combustion chamber. The Hurst “Gasifier” vaporizes the volatile gasses from<br />

the solid fuel, driven by the remaining carbon on the grates.<br />

F. Combustion Chamber<br />

Combustion Air is mixed with the volatile gas created by the gasifier and<br />

burned in this area of the furnace.<br />

G. Combustion Air System<br />

Two blowers, one under fire and one over fire, furnishes and controls the<br />

volume of air entering the Gasifier and Combustion Chamber. All above work<br />

in concert to reduce solid fuels <strong>into</strong> usable heat energy utilizing the most<br />

reliable system yet devised. Our “cruise control” system orchestrates the<br />

operation of each to match the steam load and maintain efficient combustion.<br />

43

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