Furnaces – With fuel treatment means – Means for liberating gas from solid fuel
Patent
1986-02-14
1988-05-31
Warner, Steven E.
Furnaces
With fuel treatment means
Means for liberating gas from solid fuel
110118, 110212, 110214, 110257, 110281, 110293, F23G 512
Patent
active
047473550
ABSTRACT:
A first stage, sub-stoichiometric reaction chamber (12) reacts a carbon-based fuel with an oxygen-carrying gas to produce a combustible gas, heat, and residual ash. A rectangular grate (B) supports a fuel pile (34) in the reaction chamber. A fuel supply (20) continuously supplies the carbon-based fuel from overhead in sufficient quantity to maintain the desired pile configuration with minimum particle entrainment in the generated gas. A fabric chute (36) may be provided to further limit particulate entrainment in the generated combustible gas. A temperature sensor (78) monitors temperature at the grate or another preselected reaction condition. When the preselected condition is sensed, the grates are reciprocated to step residual ash to an ash removal conveyor (74). Nozzles (82) combust a portion of the generated gas to inhibit condensation of vaporized constituents. A second stage, combustion chamber (C) completely combusts the generated gas to derive useful work therefrom.
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