Dual phase fuel feeder for boilers
AssigneeThe Babcock & Wilcox Company
InventorsJames F DeSellem, Karl M Heil, Jeremiah J Yoder, Albert D LaRue, Mikhail Maryamchik, William R Stirgwolt
Life of this patent
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Abstract
A dual phase fuel feeder is disclosed that can be used to provide both solid fuels and liquid fuels to a boiler, such as a fluidized bed boiler. The fuel feeder includes a sloped chute which defines a solid feedpath. Gas distribution nozzles are located at the base of the fuel feeder, and secondary nozzles are located so as to be able to distribute a liquid or particulate fuel into the solid feedpath. This permits the liquid fuel to contact the solid fuel and be carried into the fluidized bed instead of becoming suspended above the bed.
Claims35
An apparatus comprising:
- a fuel feeder including:
- a sloped chute having a base configured to connect with a boiler,
- gas distribution nozzles configured to inject gas into the base with the injected gas oriented to propel solid fuel fed into the sloped chute into a boiler to which the base of the sloped chute is connected, and
- secondary nozzles different from the gas distribution nozzles and configured to inject at least a fluid fuel to mix with solid fuel after the solid fuel is fed into the sloped chute.
A method comprising:
- feeding solid fuel into a sloped chute connected with a boiler;
- concurrently with the feeding, injecting a propulsion gas into a base of the sloped chute to propel the solid fuel fed into the sloped chute over a bed of the boiler;
- and
- concurrently with the feeding and the injecting of the propulsion gas, injecting at least a fluid fuel which is different from the propulsion gas to mix the at least a fluid fuel with the solid fuel after the solid fuel is fed into the sloped chute.
A dual phase fuel feeder, comprising:
- a sloped chute having a top end and a bottom end, the bottom end being proximate to a base of the fuel feeder, the chute defining a solid feed path;
- gas distribution nozzles located at the base of the fuel feeder for directing a gas into the solid feed path;
- and
- secondary nozzles placed so as to be able to direct a at least a liquid fuel and at least gas and/or particulate into the solid feed path.
Dependencies are inferred from the claim text.