Stoves and furnaces – Hot-air furnaces – Compressed air
Patent
1979-03-29
1980-08-19
Yuen, Henry C.
Stoves and furnaces
Hot-air furnaces
Compressed air
126121, 237 55, 237 51, 165DIG2, F24H 302
Patent
active
042178789
ABSTRACT:
A furnace for burning biomass such as crop residues like cornstalks and other combustibles. The furnace includes a combustion chamber and many chimney stacks extending upwardly therefrom. Loading doors are provided into the combustion chamber to permit massive batches of combustibles to be deposited in the chamber. Centrifugal combustion air draft fans are positioned to deliver forced combustion air from the atmosphere into a lower part of the chamber when needed. A heat exchanger jacket encompasses major parts of the chamber and of the stacks and is provided with an upper opening adjacent the top of the stacks and a lower opening adjacent the bottom of the chamber. Drying air to be heated enters one of the openings and heated drying air discharges from the other. Fan means adjacent the lower opening moves the drying air through the heat exchange jacket and into a crop dryer or other location for use. The drying air discharge temperature is monitored by a sensor which controls the combustion air draft fans to maintain the discharging heated drying air within predetermined temperature limits.
REFERENCES:
patent: Re5871 (1874-05-01), Twitchell
patent: 1931339 (1933-10-01), Zingone
patent: 2277381 (1942-03-01), Black
patent: 2619022 (1952-11-01), Hergenrother
patent: 3150656 (1964-09-01), Huber
patent: 3353529 (1967-11-01), Kovats
patent: 3934798 (1976-01-01), Goldsmith
patent: 3944136 (1976-03-01), Huie
patent: 4043313 (1977-08-01), Sherman
patent: 4047515 (1977-09-01), Daniel
patent: 4147303 (1979-04-01), Talucci
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