Furnaces – With exhaust gas treatment means – Afterburning means
Patent
1978-03-10
1979-12-11
Sprague, Kenneth W.
Furnaces
With exhaust gas treatment means
Afterburning means
110283, 110254, F23G 512
Patent
active
041777409
ABSTRACT:
A combustion apparatus having primary and secondary combustion chambers burns waste wood with an optional third chamber. The third chamber is used to blend the combustion products down to the desired process temperature. High pressure swirl air is admitted tangentially to the primary chamber above a burning fuel pile. The swirl air reacts with a small proportion of the pyrolized gases to maintain a steady temperature at the exit from the primary chamber. The swirl air also centrifugally separates particulate matter from the gas stream leaving the primary chamber. The total quantity of underfire and swirl air is closely controlled to maintain substoichiometric conditions in the primary chamber. Secondary air complete combustion of the pyrolized volatiles in the secondary chamber. The secondary air is admitted tangentially to establish a rotating mass of relatively cool combustion air adjacent to the walls of the secondary combustion chamber. The air reacts with the volatiles at the base of the secondary chamber, after the volatiles have first been forced radially outward by the presence of a discshaped flame holder in the inlet to the chamber.
REFERENCES:
patent: 3601069 (1971-08-01), Mancuso
patent: 3785304 (1974-01-01), Stookey
patent: 3808619 (1974-05-01), Vanderveer
patent: 3834327 (1974-09-01), Hellstrom et al.
patent: 4063521 (1977-12-01), Pech
Lamb Frank H.
Lefcort Malcolm D.
Rada Petr
Enterprises International Inc.
Sprague Kenneth W.
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