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US 10,006,627 B2Granted
Dual fuel boiler
AssigneeStephen William John Grant
InventorStephen William John Grant
Life of this patent
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Abstract
A dual fuel boiler has a granular fuel burner and a fluid fuel burner. The fluid fuel burner is movable between a retracted stored position at a side of a combustion chamber-of the boiler and an extended operative position in which it extends out over a brazier of the granular fuel burner. Thus in the operative position substantially all of the flame and hot combustion gases generated by the fluid fuel burner in use are directed away from the brazier to prevent damage to the brazier.
Claims14
A dual fuel burner assembly for a boiler having a combustion chamber, comprising:
- a granular fuel burner mounted on a side wall of the combustion chamber;
- a granular fuel brazier associated with the granular fuel burner, said granular fuel brazier being mounted on the side wall of the combustion chamber and projecting outwardly therefrom into the combustion chamber;
- a canopy mounted within the combustion chamber above the granular fuel brazier to promote full combustion of granular fuel in the granular fuel brazier;
- a fluid fuel burner mounted above the granular fuel brazier on the same side wall of the combustion chamber as the granular fuel brazier;
- an air supply duct and associated fan for feeding the granular fuel burner and associated granular fuel brazier and the fluid fuel burner;
- wherein the fluid fuel burner is mounted adjacent the granular fuel brazier on the side wall of the combustion chamber with the fluid fuel burner mounted above the granular fuel brazier between the granular fuel brazier and the associated canopy, and the fluid fuel burner is movable within the combustion chamber between a retracted stored position on the side wall of the combustion chamber at a side of the combustion chamber and an extended operative position in which the fluid fuel burner projects outwardly from the side wall of the combustion chamber into the combustion chamber extending out over the granular fuel brazier in which flame and combustion gases generated by the fluid fuel burner in use when it is in the extended operative position are directed away from the granular fuel brazier.
3 more elements
A dual fuel burner assembly for a boiler having a combustion chamber, comprising:
- a granular fuel burner mounted on a side wall of the combustion chamber;
- a granular fuel brazier associated with the granular fuel burner, said granular fuel brazier being mounted on the side wall of the combustion chamber and projecting outwardly therefrom into the combustion chamber;
- a canopy mounted within the combustion chamber above the granular fuel brazier to promote full combustion of granular fuel in the granular fuel brazier;
- a fluid fuel burner mounted above the granular fuel brazier on the same side wall of the combustion chamber as the granular fuel brazier;
- an air supply duct and associated fan for feeding the granular fuel burner and associated granular fuel brazier and the fluid fuel burner;
- wherein the fluid fuel burner is mounted adjacent the granular fuel brazier on the side wall of the combustion chamber with the fluid fuel burner mounted above the granular fuel brazier between the granular fuel brazier and the associated canopy, and the fluid fuel burner is slidably movable within the combustion chamber between a retracted stored position on the side wall of the combustion chamber at a side of the combustion chamber and an extended operative position in which the fluid fuel burner projects outwardly from the side wall of the combustion chamber into the combustion chamber extending out over the granular fuel brazier such that flame and combustion gases generated by the fluid fuel burner in use when it is in the extended operative position are directed away from the granular fuel brazier.
3 more elements
Dependencies are inferred from the claim text.