Solid fuel burning furnace
OwnerAlastair H. McKelvieinventor
Life of this patent
Estimating the term…
Abstract
A solid fuel furnace includes a vibratory bowl for its fuel bed. Structure in the furnace defines a fuel chamber over the central part of the bowl and a combustion chamber over the outward part of the bowl. Fuel is distributed outward by a central cone on the bowl. Primary air is fed beneath the rim of the cone into the fuel in the combustion chamber. The vibratory motion keeps the fuel particles evenly distributed and prevents blowholes from developing, leading to improved combustion. The vibratory motion also marches ash particles up a spiral groove in the circumferential wall of the bowl to facilitate ash removal from the fuel bed.
Claims17
In heating apparatus for use in burning solid fuel of the type which after combustion leaves an ash residue and comprising a fuel chamber, a combustion chamber, means for introducing solid fuel into the fuel chamber, means for introducing air into the combustion chamber, exhaust means for venting exhaust gas from the combustion chamber, and a bed extending from said fuel chamber into said combustion chamber;
- the improvement wherein said bed includes a vibratory bowl having a generally circular bottom, and a helically-grooved side wall with a groove therein extending substantially from said bottom to a top edge of said wall;
- vibratory drive means for driving said bowl so that the ash residue resulting from said combustion is urged by vibration up said groove to the top edge of the bowl side wall;
- and said apparatus further includes means for conducting away from said furnace said ash that is driven to said top edge.
A solid fuel burning furnace comprising a housing having a base and an exterior wall;
- a vibratory bed disposed at said base and having a bottom and an upstanding wall, said upstanding wall having a track disposed therein for vibratorily transporting ash residue from said fuel out of said bed;
- drive means for imparting a vibratory motion to said bed;
- fuel chamber means within said housing and having a lower position thereof defined by one portion of said bed, an interior wall extending upwardly from the bed, and a top;
- combustion chamber means defined by a remaining portion of said bed beyond said interior wall, and contained in a portion of said furnace thereabove between said interior wall and said exterior wall;
- means for introducing fuel into said fuel chamber means;
- means for injecting air into said combustion chamber means;
- flue means for venting exhaust gases from said combustion chamber means;
- and means coupled with said track of the vibratory bed for receiving said ash residue.
Dependencies are inferred from the claim text.