F - Mech Eng,Light,Heat,Weapons – 24 – C
Patent
F - Mech Eng,Light,Heat,Weapons
24
C
126/62
F24C 1/14 (2006.01) F24B 1/02 (2006.01) F24B 5/02 (2006.01)
Patent
CA 1292398
SECONDARY COMBUSTION DEVICE FOR WOODBURNING STOVE. Abstract of Invention An improvement in a woodburning stove of the type in- cluding an exhaust flue opening; a combustion chamber for primary combustion, having an access door, a support for wood to be burned and a primary air inlet means for supply- ing primary air to support primary combustion of the wood to produce flue gases containing combustible particulate material; conduit means for directing the flue gases from the combustion chamber to the flue opening in a preselected path; and, secondary combustion means for burning the parti- culate material in the flue gases before the flue gases pass through the exhaust flue opening. The improvement involves the secondary combustion means for supplying many jets of secondary air into the flue gases adjacent to the combustion chamber together with a laterally elongated, secondary com- bustion device having a constriction effect on the flue gases and a large volume secondary combustion plenum chamber with the combustion device and plenum chamber connected in series between the combustion chamber and the exhaust flue opening. This secondary combustion device includes two closely spaced, generally parallel walls through which the flue gases and secondary air pass from the combustion chamber through an exit end of the device into the plenum chamber in a wide, narrow flow pattern and including means for thermally insul- ating the outermost wall of the secondary combustion device whereby it rapidly attains and retains a high temperature with- out absorbing substantial heat energy. The secondary air is provided by a laterally extending manifold with openings pro- ducing many distinct secondary air jets extending into the flue gases ahead of the elongated passage defined by the two generally parallel walls as previously mentioned. This novel secondary combustion device for improving a woodburning stove also employs a baffle plate at the exit end of the secondary combustion device, which plate agitates and decreases the velocity of the mixture of flue gases and thereby further enhance the total reduction of particulate material exiting from the plenum chamber into the exhaust flue opening.
534741
Craver Richard D.
Gowling Lafleur Henderson Llp
Orrville Products Inc.
The Louis Berkman Company
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