Universal burner
AssigneeGeneral Electric Company
InventorSotiris Lambiris
Life of this patent
Estimating the term…
Abstract
This disclosure pertains to wall burners which are used to raise the temperature of a gas stream flowing through a duct. Wall burners are mounted outside the duct and fire into the duct through a porthole formed in the duct wall. The present invention is uniquely characterized by a pre-main combustion chamber wherein a combusting fuel-air mixture is generated using only a small amount of the total fuel expended by the burner. The combusting mixture travels downstream through an accelerator ring and into the duct at high velocity and momentum. On the downstream side of the accelerator ring, main fuel ports inject the major portion of the fuel expended into the combusting fuel-air mixture whereupon a transfer of heat and momentum takes place which carries the unburned main fuel into the duct where the main combustion process takes place.
Claims13
An apparatus for raising the temperature of an exhaust gas stream flowing through a duct, the apparatus being mounted substantially transverse to the exhaust gas flow and outside the duct;
- and, the apparatus communicating with the exhaust gas stream through a porthole in the duct, the apparatus comprising:
- a substantially cylindrical outer casing having a downstream end adjacent the duct;
- a substantially cylindrical perforate inner liner disposed within the outer casing;
- the inner liner and the outer casing having an annular chamber therebetween;
- means providing pressurized air into the inner liner;
- means providing a relatively small amount of fuel into the inner liner for mixing with the air to form a combustible mixture;
- means for igniting the fuel and air mixture in said inner liner;
- means at the downstream end of the inner liner for accelerating the flow rate of the fuel and air mixture;
- and;
- fuel ports on the downstream side of the accelerator means for providing a relatively large amount of fuel into the ignited mixture whereby the combustion process is continued in the exhaust gas duct.
A burner comprising:
- an outer cylindrical casing;
- a perforate, cylindrical inner liner within the outer casing, said inner liner and outer casing defining an annular chamber therebetween;
- means providing combustion air into said inner liner through said annular chamber;
- means providing a relatively small amount of liquid fuel into said inner liner for mixing with said combustion air to form a combustible mixture;
- means for igniting said combustible mixture within said inner liner;
- means at the downstream end of said inner liner for accelerating said combustible mixture;
- and,
- fuel ports on said accelerator means for providing a relatively large amount of liquid fuel into said ignited combustible mixture as it flows through said accelerator means.
A burner comprising:
- a cylindrical outer casing;
- a perforate, cylindrical inner liner within the outer casing, said inner liner and outer casing defining an annular chamber therebetween;
- means providing combustion air into said inner liner through said annular chamber;
- means providing a relatively small amount of gaseous fuel into said inner liner for mixing with said combustion air to form a combustible mixture;
- means for igniting said combustible mixture within said inner liner;
- means at the downstream end of said inner liner for accelerating said combustible mixture;
- and,
- fuel ports on the accelerator means for providing a relatively large amount of gaseous fuel into said ignited combustible mixture as it flows through said accelerator means.
A dual fuel burner operable on a liquid fuel or a gaseous fuel comprising:
- a cylindrical outer casing;
- a perforate, cylindrical inner liner within the outer casing, said inner liner and outer casing defining an annular chamber therebetween;
- means providing combustion air into said inner liner through said annular chamber;
- means providing a relatively small amount of liquid fuel or gaseous fuel into said inner liner for mixing with the air to form a combustible mixture;
- means for igniting said fuel and air within said inner liner;
- means at the downstream end of said inner liner for accelerating said combustible mixture;
- and
- fuel ports on the accelerator means for providing a relatively large amount of liquid fuel or gaseous fuel into said combustible mixture as it flows through said accelerator means.
Dependencies are inferred from the claim text.