초록 ▼

A gas turbine cogeneration plant having a combined heat recovery and emission control system with a first steam boiler having a bank of steam generating tubes upstream of a NOX emission reduction unit and second and third steam boilers having banks of steam generating tubes downstream of the NOX emi

A gas turbine cogeneration plant having a combined heat recovery and emission control system with a first steam boiler having a bank of steam generating tubes upstream of a NOX emission reduction unit and second and third steam boilers having banks of steam generating tubes downstream of the NOX emission reduction unit and wherein the upstream steam boiler has a temperature responsive control system which regulates the upstream boiler pressure and thereby regulates the temperature and heat exchange rate of its steam generating tubes to regulate the temperature of the exhaust gas stream at the NOX emission reduction unit.

대표청구항 ▼

In a cogeneration plant having a gas turbine engine, an electric generator driven by the engine and a combined heat recovery and emission control system for the recovery of heat from and reduction of pollutants in the exhaust gas stream from the engine, the combined system comprising a plurality of

In a cogeneration plant having a gas turbine engine, an electric generator driven by the engine and a combined heat recovery and emission control system for the recovery of heat from and reduction of pollutants in the exhaust gas stream from the engine, the combined system comprising a plurality of steam boilers, each having at least one bank of a plurality of steam generating tubes, a steam conduit system having a first steam header for supplying steam at a first preselected nominal pressure, an emission control unit for reducing pollutants in the exhaust gas stream by chemical conversion, a duct for conducting the exhaust gas stream through said banks of steam generating tubes and the emission control unit, the plurality of steam boilers comprising a first steam boiler having its said bank of steam generating tubes upstream of the emission control unit and a second steam boiler having its said bank of steam generating tubes downstream of the emission control unit, said first and second steam boilers being connected for supplying steam to the steam conduit system, the improvement wherein said first steam boiler is an exhaust gas temperature regulating boiler having a first, exhaust gas temperature responsive, boiler control system for regulating the supply of steam from said first steam boiler to the steam conduit system in accordance with the temperature of the exhaust gas stream at the emission control unit, to vary the operating pressure of said first steam boiler, and thereby vary the temperature and heat exchange rate of said bank of steam generating tubes of said first steam boiler, to maintain the exhaust gas stream at the emission control unit at a preestablished desired nominal temperature for said chemical conversion.