초록 ▼

A combustion device for hydrogen-rich gas is provided. Before entering a chamber, fuel and air are non-premixed for avoiding flushback. A vortex generator and a fuel sprayer are combined to mix fuel and air for enhancing burning effect. Vortex flame is generated with stabilizing aerodynamics of flow

A combustion device for hydrogen-rich gas is provided. Before entering a chamber, fuel and air are non-premixed for avoiding flushback. A vortex generator and a fuel sprayer are combined to mix fuel and air for enhancing burning effect. Vortex flame is generated with stabilizing aerodynamics of flow provided through vortex breakdown. A flameholder is formed downstream an injector to maintain stable combustion. Cooling air is introduced from a sheath to cool down a high-temperature gas, which leaves the combustion chamber and drives a turbine for turning a power generator. Thus, the present invention effectively mixes fuel and air, avoids flushback and prevents combustor damage.

대표청구항 ▼

1. A hydrogen-rich gas combustion device, comprising a chamber, a cooling air sheath, a fuel sprayer, a vortex generator, an igniter and a vessel shell, wherein said chamber has a non-premixed air conduit inside; said chamber has an air distributor at an upstream end of said chamber corresponding to

1. A hydrogen-rich gas combustion device, comprising a chamber, a cooling air sheath, a fuel sprayer, a vortex generator, an igniter and a vessel shell, wherein said chamber has a non-premixed air conduit inside; said chamber has an air distributor at an upstream end of said chamber corresponding to said non-premixed air conduit; and said chamber has a non-premixed fuel conduit at a side of said chamber;wherein said cooling air sheath is positioned at an opposite downstream end of said chamber; said cooling air sheath has a plurality of holes on a surrounding wall of said cooling air sheath; said cooling air sheath defines a combustion chamber inside; and said cooling air sheath has a first corresponding hole to accommodate said igniter;wherein said fuel sprayer is located in said chamber; and said fuel sprayer is connected with said non-premixed fuel conduit;wherein said vortex generator is positioned around said fuel sprayer; andsaid vortex generator defines a partially pre-mixing annulus downstream in an annular space between said fuel sprayer and said combustion chamber;wherein said igniter is located at a side of said cooling air sheath and is corresponding to said fuel sprayer; andwherein said vessel shell is sleeved outside around said chamber and said cooling air sheath to define a cooling air conduit in said vessel shell; and said vessel shell has a second corresponding hole to be connected with said non-premixed fuel conduit,wherein said chamber has an opening at said opposite downstream end of said chamber; said non-premixed fuel conduit is connected with said opening; and said fuel sprayer is located in said opening,wherein said chamber has a plurality of connecting holes around said opening of said chamber; said non-premixed air conduit is connected with said plurality of connecting holes; and said vortex generator is located downstream of said plurality of connecting holes opposite to said cooling air sheath. 2. The device according to claim 1, wherein said chamber has a stopper around an outside surface of said chamber; and an end of said cooling air sheath is mounted against said stopper. 3. The device according to claim 1, wherein said air distributor is further connected with a compressor; said cooling air sheath and said vessel shell are connected with a turbine through a combustor outlet; and said turbine is connected with a power generator. 4. The device according to claim 1, wherein said air distributor is further connected with a compressor; and said cooling air sheath and said vessel shell are connected with a power turbine through a combustor outlet to provide mechanical drive power to operate rotational machinery. 5. The device according to claim 1, wherein said plurality of holes of said cooling air sheath is distributed along a gas flow direction into a plurality of rows having an equal interval between neighboring rows; and a diameter of said hole in each of said rows increases along said gas flow direction. 6. The device according to claim 1, wherein said cooling air sheath is a cylinder and has a flange baffle disposed on top of a downstream end of said cooling air sheath. 7. The device according to claim 1, wherein said cooling air sheath defines a sudden-expansion tube at a position mounted against the downstream end of said chamber and has a flange baffle disposed on top of the downstream end of said cooling air sheath. 8. The device according to claim 1, wherein said cooling air sheath defines a shape of a Venturi tube at a position mounted against the downstream end of said chamber and has a flange baffle disposed on top of a downstream end of said cooling air sheath. 9. The device according to claim 1, wherein said cooling air sheath has a combined shape of a Venturi followed with a sudden-expansion tube at a position mounted against the downstream end of said chamber and has a flange baffle disposed on top of a downstream end of said cooling air sheath. 10. The device according to claim 1, wherein said cooling air sheath has a gradually-expanding (semi-Venturi) tube at a position mounted against an end of said combustion chamber and has a flange baffle disposed on top of the downstream end of said cooling air sheath. 11. The device according to claim 1, wherein said fuel sprayer has a plurality of nozzles arranged with a certain angle relative to a flow direction around said fuel sprayer to spray fuel in a radial way to further interact with air downstream of said vortex generator to uniformly mix fuel with air. 12. The device according to claim 1, wherein said fuel sprayer has a plurality of nozzles arranged with a certain angle around said fuel sprayer; said fuel sprayer has a dead-end tip along a central axis of said device; and, combined with said cooling air sheath mounted against a stopper of said chamber, an expanding opening is formed adjacent said fuel sprayer and a flameholder is configured at an outlet of said fuel sprayer. 13. The device according to claim 1, wherein said vortex generator has a plurality of blades; and air in said non-premixed air conduit of said chamber is guided by said plurality of blades to change flowing direction and generates a swirling flow field around said fuel sprayer. 14. A hydrogen-rich gas combustion device, comprising a chamber, a cooling air sheath, a fuel sprayer, a vortex generator, an igniter and a vessel shell, wherein said chamber has a non-premixed air conduit inside; said chamber has an air distributor at an upstream end of said chamber corresponding to said non-premixed air conduit; and said chamber has a non-premixed fuel conduit at a side of said chamber;wherein said cooling air sheath is positioned at an opposite downstream end of said chamber; said cooling air sheath has a plurality of holes on a surrounding wall of said cooling air sheath; said cooling air sheath defines a combustion chamber inside; and said cooling air sheath has a first corresponding hole to accommodate said igniter;wherein said fuel sprayer is located in said chamber; and said fuel sprayer is connected with said non-premixed fuel conduit;wherein said vortex generator is positioned around said fuel sprayer; andsaid vortex generator defines a partially pre-mixing annulus downstream in an annular space between said fuel sprayer and said combustion chamber;wherein said igniter is located at a side of said cooling air sheath and is corresponding to said fuel sprayer; andwherein said vessel shell is sleeved outside around said chamber and said cooling air sheath to define a cooling air conduit in said vessel shell; and said vessel shell has a second corresponding hole to be connected with said non-premixed fuel conduit, andwherein said chamber has a stopper around an outside surface of said chamber; and an end of said cooling air sheath is mounted against said stopper.