Solid Particle Fuel Burner
OwnerEdward Norbert Endebrockinventor
Life of this patent
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Abstract
A burner for solid particle fuels such as shavings or pellets. The invention includes an auger to deliver fuel particles up an inclined tube into a cup having an oxygen emitting orifice for combustion. The auger is axially extendable and retractable to first advance material up the tube without rotation, and then retract with rotation so as to screw itself into the next charge of material to be advanced. Combustion heat may be used to drive a Stirling engine to comprise a combined heat and power (CHP) system. Flue gases may also be condensed onto chilled objects as beneficial ceramic-like coatings, or these objects may be made of frangible or soluble material so that the condensate may be collected separately as a valuable ceramic-like material.
Claims15
An apparatus for oxygen-enriched burning, comprising
- a combustion cup having a floor and a perimeter wall having a rim,
- an oxygen delivery tube communicating with said combustion cup,
- a fuel feed tube having a lumen oriented at an inclined angle between 30° and 75° inclusive, said lumen communicating with said combustion cup,
- an auger deposed within said lumen, said auger rotatably coupled to and slidably coupled to said fuel feed tube,
- a motor operably coupled to said auger for rotation thereof, and
- means for sliding said auger between a retracted position and an extended position.
A combined heat and power system, comprising
- an apparatus for oxygen-enriched burning further comprising
- a combustion cup having a floor and a perimeter wall having a rim,
- an oxygen delivery tube communicating with said combustion cup,
- a fuel feed tube having a lumen oriented at an inclined angle between 30° and 75° inclusive, and said lumen communicating with said combustion cup,
- an auger deposed within said lumen, said auger rotatably coupled to and slidably coupled to said fuel feed tube,
- a motor operably coupled to said auger for rotation thereof, and
- means for sliding said auger between a retracted position and an extended position, and
- an air-cycle engine.
The combined heat and power system of claim 8, wherein said oxygen delivery tube contains a gas comprising at least 50% oxygen.
A method for collecting a ceramic precipitate from flue gas, comprising the steps of:
- a. providing an apparatus for oxygen-enriched burning of solid particulate fuel, comprising
- a fuel feed tube having a lumen oriented at an inclined angle between 30° and 75° inclusive, and said lumen communicating with said combustion cup,
- an auger deposed within said lumen, said auger rotatably coupled to and slidably coupled to said fuel feed tube,
- a motor operably coupled to said auger for rotation thereof, and
- means for sliding said auger between a retracted position and an extended position, and
- b. providing solid particulate fuel, a gas comprising at least 85% oxygen, and an ignition source to begin combustion,
- c. burning said solid particulate fuel at combustion temperature exceeding 4000° F. and producing flue gas thereby,
- d. providing chilled items to be coated,
- e. passing said chilled items through said flue gas, and
- f. allowing a ceramic precipitate to accrue onto a surface of at least one of said chilled items.
Dependencies are inferred from the claim text.