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US 9,927,174 B2Granted
Self Torrefied Pellet Stove
OwnerGeoffrey W. A. Johnsoninventor
Life of this patent
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Abstract
A pellet stove, having a pellet hopper, a combustion chamber, a heat exchanger and a pellet movement assembly, adapted to move the pellets from the hopper into the combustion chamber. The pellet movement assembly is located and configured so as to be heated by exhaust gases from the combustion chamber and the pellets spend a sufficient amount of time in the pellet movement assembly, where oxygen is prevented from freely flowing in, so that the pellets are torrefied during transit to the combustion chamber.
Claims16
A pellet stove, comprising:
- a. a pellet hopper;
- b. a combustion chamber;
- c. a pellet movement assembly, adapted to move said pellets from said hopper into said combustion chamber;
- d. wherein said pellet movement assembly is located and configured so as to be heated by exhaust gasses from said combustion chamber and wherein said pellets spend a sufficient amount of time in said pellet movement assembly, and wherein oxygen is prevented from freely flowing into said pellet movement assembly, so that said pellets are torrefied during transit to said combustion chamber;
- e. wherein said pellets in said pellet movement assembly generate volatile organic compounds;
- and
- f. wherein said volatile organic compounds are captured and delivered to, and burned in, said combustion chamber.
4 more elements
A method of burning pellets in a pellet stove, comprising:
- a. providing a pellet stove, having:
- i. a pellet hopper;
- ii. a combustion chamber, in which pellets are being burned;
- iii. a pellet movement assembly, adapted to move said pellets from said hopper into said combustion chamber;
- and
- iv. wherein said pellet movement assembly is located and configured so as to be heated by exhaust gases from said combustion chamber;
- b. moving said pellets to said combustion chamber while maintaining a low oxygen environment in said movement assembly, so that said pellets are torrefied as they move to said combustion chamber, wherein said pellets in said pellet movement assembly generate volatile organic compounds and wherein said volatile organic compounds are captured and delivered to, and burned in, said combustion chamber;
- and
- c. delivering said torrefied pellets to said combustion chamber, where combustion chamber heat and oxygen ignites them.
6 more elements
Dependencies are inferred from the claim text.