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Steam turbine plant

  • US 7,278,267 B2
  • Filed: 02/23/2005
  • Issued: 10/09/2007
  • Est. Priority Date: 02/24/2004
  • Status: Expired due to Fees
First Claim
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1. A steam turbine plant, comprising:

  • a boiler that generates steam,wherein the boiler utilizes coal to generate the steam;

    a steam turbine driven by the steam generated in the boiler;

    a feedwater system that recovers the steam exhausted from the steam turbine and supplies the steam to the boiler as feedwater;

    a superheating combustor provided between the boiler and the steam turbine,wherein fuel originated from a hydrocarbon fuel and an oxidizer are mixed with the steam generated in the boiler and combusted in the superheating combustor to increase the temperature of the steam; and

    a fuel controller which controls a quantity of heat of the hydrocarbon fuel up to about 40 percent of a total heat quantity of the fuel and the coal utilized in the plant.

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