Multistaged Lean Prevaporizing Premixing Fuel Injector
AssigneeCapstone Turbine Corporation
InventorsMark G. Mitchell, Junhua Chen
Life of this patent
Estimating the term…
Abstract
A multistaged lean prevaporizing premixing fuel injector apparatus is provided. The fuel injector may be utilized with a turbogenerator. Preheated combustion air from the turbogenerator's recuperator may be utilized by the fuel injector to prevaporize liquid fuel. The injector may provide for premixing of multiple fuel streams and include multiple stages with a flow distributor plate separating adjacent stages. The injector may include multiple stages, with a pilot tube located in a final stage splitting the fuel stream into a premixed pilot stream and a premixed final fuel and air mixture stream.
Claims37
A multistaged lean prevaporizing premixing fuel injector apparatus for mixing multiple fuels, comprising:
- a preliminary prevaporizing premixing chamber having a central longitudinal axis and having an inlet end, and having a preliminary air inlet for introducing air into the preliminary prevaporizing premixing chamber;
- a final prevaporizing premixing chamber communicated with and downstream of the preliminary prevaporizing premixing chamber, and having a final air inlet for introducing air into the final prevaporizing premixing chamber, the final prevaporizing premixing chamber having an outlet end;
- a liquid fuel nozzle arranged to project a spray of a liquid first fuel into the preliminary prevaporizing premixing chamber;
- a second fuel inlet communicated with the preliminary prevaporizing premixing chamber for introducing a second fuel into the preliminary prevaporizing premixing chamber;
- a common air supply passage for communicating a common combustion air source to both the preliminary air inlet and the final air inlet at substantially the same temperature;
- and
- a final flow distributor located upstream of the final prevaporizing premixing chamber for distributing a fuel-air mixture of the first and second fuels and air across a cross-section of the final prevaporizing premixing chamber.
A multistaged lean prevaporizing premixing fuel injector apparatus, comprising:
- a preliminary prevaporizing premixing chamber having a central longitudinal axis and having an inlet end, and having a preliminary air inlet for introducing air into the preliminary prevaporizing premixing chamber transversely to the longitudinal axis;
- a final prevaporizing premixing chamber downstream of the preliminary prevaporizing premixing chamber, and having a final air inlet for introducing air into the final prevaporizing premixing chamber, the final prevaporizing premixing chamber having an outlet end;
- a liquid fuel nozzle arranged to project a spray of liquid fuel into the preliminary prevaporizing premixing chamber upstream of the preliminary air inlet;
- and
- a common air supply passage for communicating a common combustion air source to both the preliminary air inlet and the final air inlet at substantially the same temperature.
A multistaged lean prevaporizing premixing fuel injector apparatus, comprising:
- a preliminary prevaporizing premixing chamber having an injector inlet end and having a central longitudinal axis;
- a final premixing chamber communicated with the preliminary prevaporizing premixing chamber and having an injector outlet end;
- a pilot tube located in the final premixing chamber for diverting a pilot stream portion of a fuel and air mixture from the preliminary prevaporizing premixing chamber to the injector outlet end, the pilot tube including a pilot tube inlet and a pilot tube outlet;
- a liquid fuel nozzle arranged to spray a liquid fuel into the preliminary prevaporizing premixing chamber and toward the final premixing chamber;
- a preliminary air inlet communicated with the preliminary prevaporizing premixing chamber for communicating preliminary combustion air to the preliminary prevaporizing premixing chamber;
- and
- a final air inlet communicated with the final premixing chamber for communicating final combustion air to the final premixing chamber, the final air inlet being located downstream of the pilot tube inlet so that a fuel and air mixture exiting from the pilot tube has a higher fuel to air ratio than does a fuel and air mixture exiting the final premixing chamber.
Dependencies are inferred from the claim text.