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US 5,588,378 AGranted
Combustion enhancement system with in-bed foils
AssigneeNew York State Electric & Gas Corporation
InventorRick A. Mancini
Life of this patent
Estimating the term…
Abstract
A combustion enhancement system with in-bed foils are utilized to enhance combustion and emissions. The combustion enhancement system is especially designed for use in a traveling grate-type stoker in which the combustion foils are positioned on the top surface of the grate such that the fuel is moved past the foils by the grate. The combustion foils are provided with a high pressure fluid, such as a gas, to be injected into the fuel. The combustion foils are shaped to divide the fuel such as to create turbulence within the fuel. Preferably, the fluid is injected into the fuel at the point of turbulence.
Claims38
A stoker combustion enhancing system for a furnace, comprising:
- a traveling grate for supporting a bed of fuel, said grate having an upper movable grate surface extending between a first end of said grate for receiving fuel to be burned and a second end of said grate for discharging spent fuel;
- a first piping system for supplying combustion air beneath said upper grate surface of said grate;
- a combustion enhancing member with a fluid receiving cavity positioned above said upper grate surface, said combustion enhancing member having a fuel engaging exterior surface with at least one passageway in fluid communication with said cavity for ejecting the fluid from said cavity into the fuel moving along said grate;
- and
- a second piping system, independent from said first piping system, providing a source of pressurized fluid in fluid communication with said cavity of said combustion enhancing member for injecting a non-aqueous combustion enhancing agent into an area of the bed of fuel,
- said combustion enhancing member being located in at least one oxygen deficient zone or maximum reactivity zone of ignited fuel on the bed of fuel.
3 more elements
A stoker combustion enhancing system for a furnace, comprising:
- a traveling grate for supporting a bed of fuel, said grate having an upper movable grate surface extending between a first end of said grate for receiving fuel to be burned and a second end of said grate for discharging spent fuel:
- a piping system for supplying combustion air beneath said upper grate surface of said grate;
- a combustion enhancing member with a fluid receiving cavity positioned above said upper grate surface, said combustion enhancing member having a fuel engaging exterior surface with at least one passageway in fluid communication with said cavity for ejecting the fluid from said cavity into the fuel moving along said grate;
- and
- a source of pressurized fluid in fluid communication with said cavity of said combustion enhancing member for injecting a non-aqueous combustion enhancing agent into an area of the bed of fuel,
- said combustion enhancing member being located in at least one oxygen deficient zone or maximum reactivity zone of ignited fuel on the bed of fuel,
- said combustion enhancing member including a first foil, and a pedestal connected to said foil.
4 more elements
A stoker combustion enhancing system for a furnace, comprising:
- a traveling grate for supporting a bed of fuel, said grate having an upper movable grate surface extending between a first end of said grate for receiving fuel to be burned and a second end of said grate for discharging spent fuel;
- a piping system for supplying combustion air beneath said upper grate surface of said grate;
- a combustion enhancing member with a fluid receiving cavity positioned above said upper grate surface, said combustion enhancing member having a fuel engaging exterior surface with at least one passageway in fluid communication with said cavity for ejecting the fluid from said cavity into the fuel moving along said grate;
- and
- a source of pressurized fluid in fluid communication with said cavity of said combustion enhancing member for injecting a non-aqueous combustion enhancing agent into an area of the bed of fuel,
- said combustion enhancing member being located in at least one oxygen deficient zone or maximum reactivity zone of ignited fuel on the bed of fuel,
- a plurality of said combustion enhancing members positioned in series above said grate within the ignited fuel,
- each of said combustion enhancing members includes a pedestal supported on said upper grate surface, and at least one first foil spaced above said grate surface with said at least one passageway being formed therein.
5 more elements
A method of enhancing combustion of a burning fuel within a combustion zone of a furnace, comprising the steps of
- supplying fuel to said combustion zone by a traveling grate having an upper movable grate surface extending between a first end of said grate which receives the fuel to be burned and a second end of said grate which discharges spent fuel therefrom;
- supplying combustion air, through a first piping system, beneath said upper grate surface of said traveling grate;
- providing a combustion enhancing member with a fluid receiving cavity above said upper grate surface of said traveling grate for enhancing combustion of the fuel, said combustion enhancing member having a fuel engaging exterior surface with at least one passageway therein;
- and
- injecting a pressurized fluid, through a second piping system independent from said first piping system, into the fuel moving along said traveling grate via said at least one passageway formed in said combustion enhancing member, said fluid containing a non-aqueous combustion enhancing agent.
2 more elements
The method of enhancing combustion of a burning fuel within a combustion zone of a furnace comprising the steps of
- supplying fuel to said combustion zone by a traveling grate having an upper movable grate surface extending between a first end of said grate which receives the fuel to be burned and a second end of said grate which discharges spent fuel therefrom;
- supplying combustion air beneath said upper grate surface of said traveling grate:
- providing a combustion enhancing member with a fluid receiving cavity above said upper grate surface of said traveling grate for enhancing combustion of the fuel, said combustion enhancing member having a fuel engaging exterior surface with at least one passageway therein and said combustion enhancing member including a first foil and a pedestal connected to said foil;
- and
- injecting a pressurized fluid into the fuel moving along said traveling grate via said at least one passageway formed in said combustion enhancing member, said fluid containing a non-aqueous combustion enhancing agent.
2 more elements
A stoker combustion enhancing system for a furnace, comprising:
- a traveling grate for supporting a bed of fuel, said grate having an upper movable grate surface extending between a first end of said grate for receiving fuel to be burned and a second end of said grate for discharging spent fuel;
- a first piping system for supplying combustion air beneath said upper grate surface of said grate;
- a combustion enhancing member with a fluid receiving cavity positioned above said upper grate surface, said combustion enhancing member having a fuel engaging exterior surface with at least one passageway in fluid communication with said cavity for ejecting the fluid from said cavity into the fuel moving along said grate;
- and
- a source of pressurized fluid in fluid communication with said cavity of said combustion enhancing member for injecting a non-aqueous combustion enhancing agent into an area of the bed of fuel,
- said combustion enhancing member being located in at least one oxygen deficient zone or maximum reactivity zone of ignited fuel on the bed of fuel and movably mounted within the bed of fuel for longitudinal movement along said upper movable grate surface.
3 more elements
A stoker combustion enhancing system for a furnace, comprising:
- a traveling grate for supporting a bed of fuel, said grate having an upper movable grate surface extending between a first end of said grate for receiving fuel to be burned and a second end of said grate for discharging spent fuel;
- a piping system for supplying combustion air beneath said upper grate surface of said grate;
- a combustion enhancing member with a fluid receiving cavity positioned above said upper grate surface, said combustion enhancing member having a fuel engaging exterior surface with a wedge-shaped leading edge, a trailing edge spaced from said leading edge, and at least one passageway in fluid communication with said cavity for ejecting the fluid from said cavity into the fuel moving along said grate;
- and
- a source of pressurized fluid in fluid communication with said cavity of said combustion enhancing member for injecting a non-aqueous combustion enhancing agent into an area of the bed of fuel,
- said combustion enhancing member being located in at least one oxygen deficient zone or maximum reactivity zone of ignited fuel on the bed of fuel.
3 more elements
A method of enhancing combustion of a burning fuel within a combustion zone of a furnace, comprising the steps of
- supplying fuel to said combustion zone by a traveling grate having an upper movable grate surface extending between a first end of said grate which receives the fuel to be burned and a second end of said grate which discharges spent fuel therefrom;
- supplying combustion air beneath said upper grate surface of said traveling grate by a first piping system;
- providing a combustion enhancing member with a fluid receiving cavity above said upper grate surface of said traveling grate for enhancing combustion of the fuel, said combustion enhancing member having a fuel engaging exterior surface with at least one passageway therein,
- selectively moving said combustion enhancing member longitudinally along said upper movable grate to position said combustion enhancing member at a particular location within the fuel bed;
- and
- injecting a pressurized fluid into the fuel moving along said traveling grate via said at least one passageway formed in said combustion enhancing member, said fluid containing a non-aqueous combustion enhancing agent.
3 more elements
A method of enhancing combustion of a burning fuel within a combustion zone of a furnace, comprising the steps of
- supplying fuel to said combustion zone by a traveling grate having an upper movable grate surface extending between a first end of said grate which receives the fuel to be burned and a second end of said grate which discharges spent fuel therefrom;
- supplying combustion air beneath said upper grate surface of said traveling grate;
- providing a combustion enhancing member with a fluid receiving cavity above said upper grate surface of said traveling grate for enhancing combustion of the fuel, said combustion enhancing member having a fuel engaging exterior surface with a wedge-shaped leading edge, a trailing edge spaced from said leading edge, and at least one passageway therein, said fuel engaging exterior surface creating turbulence within the fuel;
- and
- injecting a pressurized fluid into the fuel moving along said traveling grate via said at least one passageway formed in said combustion enhancing member, said fluid containing a non-aqueous combustion enhancing agent.
2 more elements
Dependencies are inferred from the claim text.