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US 4,936,088 AGranted
Low NOX cogeneration process
AssigneeRadian Corporation
InventorRonald D. Bell
Life of this patent
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AssigneeRadian Corporation
InventorRonald D. Bell
Estimating the term…
A process for low NOX cogeneration to produce electricity and heat which involves combusting fuel to produce a gaseous stream of combustion products, passing the gaseous stream through a turbine to generate electricity, and to produce a gaseous exhaust stream, adding additional fuel to the exhaust stream, to provide a fuel-rich gas stream having fuel in excess of the oxygen in the combustible gas stream, treating the fuel-rich gas stream in a reducing atmosphere to produce a heated oxygen-depleted gaseous stream, converting at least a portion of the heat in the oxygen depleted stream into steam, adding air to the oxygen-depleted stream to produce a stoichiometric excess of oxygen in the resultant stream relative to fuel present in the resultant stream, passing the resultant stream over an oxidizing catalyst to produce an oxidized gaseous stream, removing heat from the oxidized stream, and venting the resultant cooled stream, the process further providing for cycling to the combusting step at least some of the oxidized gaseous stream. An apparatus system for carrying out this process is also provided.
A process for low NOX cogeneration to produce electricity and heat which comprises combusting fuel to produce a gaseous stream of combustion products, passing said gaseous stream through a turbine to generate electricity, and to produce a gaseous exhaust stream, adding additional fuel to said exhaust stream, to provide a fuel-rich gas stream having fuel in excess of the oxygen in said fuel-rich gas stream, treating said combustible gas stream in a reducing atmosphere to produce a heated oxygen-depleted gaseous stream, converting at least a portion of the heat in said oxygen-depleted stream into steam, adding air to said oxygen-depleted stream to produce a stoichiometric excess of oxygen in the resultant stream relative to fuel present in said resultant stream, passing said resultant stream over an oxidizing catalyst to produce an oxidized gaseous stream, removing heat from said oxidized stream, and venting the resultant cooled stream, cycling a stream consisting of at least a portion of said oxidized stream to said combusting step.
A system for low NOX cogeneration to produce electricity and heat which comprises means for combusting fuel to produce a gaseous stream of combustion products, a turbine connected to generate electricity, conduit means for passing said gaseous stream through said turbine to effect generation of electricity, conduit means for passing the gaseous exhaust stream from said turbine, means for adding additional fuel to said exhaust stream to provide a fuel-rich gas stream having fuel in excess of the oxygen in said combustible gas stream, means for treating said fuel-rich gas stream in a reducing atmosphere to produce a heated oxygen-depleted gaseous stream, means for converting at least a portion of the heat in the gaseous stream treated in said treating means into steam, means for adding air to said last-named stream to produce a stoichiometric excess of oxygen in the resultant stream relative to fuel present in said resultant stream, gas passage means containing an oxidizing catalyst, conduit means for passing said resultant stream into said gas passage means and over said oxidizing catalyst to produce an oxidized gaseous stream, means for removing heat from said oxidized stream, conduit means for passing said oxidized gaseous stream from said gas passage means to said means for removing heat, a vent, a gas conduit connecting said means for removing heat to said vent, and means for cycling said oxidized gaseous stream to said combusting means.
Dependencies are inferred from the claim text.