Sawdust and wood chip burner
OwnerHerbert M. Goodineinventor
Life of this patent
Estimating the term…
Abstract
A sawdust and chip burner for use with an existing furnace for heating water or a forced air system. The burner overcomes a previously known deficiency in prior burners in overcoming burn-back, the latter meaning creeping of combustion back into the stored fuel. The burn-back hazard is overcome in the present invention by the provision of double-walling of the fuel hopper adjacent the exit thereof and the supplying of cooling air through the passage formed by the double walling. In addition to preventing burn-back, the cooling air exits at a higher temperature and the thus heated air may be used to augment the heat output from the burner.
Claims9
A burner for use with sawdust, wood chips or other particulate fuel, comprising:
- (i) a front wall, including a door which is substantially air-tight when closed,
- (ii) a rear wall having an aperture therein from which combustion gases may exit from the burner,
- (iii) a first side outer wall including a cold air entry aperture,
- (iv) a first side inside wall spaced inwardly from said first side outer wall, to form a first space,
- (v) a second side outer wall including a hot air exit aperture,
- (vi) a second side inner wall spaced inwardly from said second side outer wall to form a second space,
- (vii) a top member joined to said front, rear and outer walls,
- (viii) a hopper support extending upwardly from said top member, said hopper support including at least one combustion air intake with air flow adjustment means thereon, and,
- (ix) front and rear hopper members fastened to the said hopper support members and extending downwardly therefrom, said front and rear hopper members converging towards each other at the lower ends thereof to provide a space therebetween from which fuel may fall into a combustion region, both said front and rear hopper members being hollow and each extend between and is fastened to said fist side inner wall and said second side inner wall each of which includes apertures corresponding to the space defined by the respective hollow front and rear hopper members, whereby air flow between said first and second spaces is safely through said hollow hopper members.
Dependencies are inferred from the claim text.