Pressurized circulating fluidized bed reactor combined cycle power generation system
AssigneeFoster Wheeler USA Corporation
InventorJuan A. Garcia-Mallol
Life of this patent
Estimating the term…
Abstract
A combined cycle power generation system incorporates a carbonizer and a pressurized fluidized bed reactor for the generation of fuel gas and flue gases, respectively. A combustor is provided for the combustion of the fuel gas in the presence of the flue gases to produce hot gases. The hot gases are passed through a gas turbine where the gases expand and cool while performing work in the generation of electrical power. The exhaust gases from the gas turbine are passed though a heat recovery unit for the production of steam. The exhaust gases are then combined with air and passed to the pressurized fluidized bed reactor to provide excess secondary gas to aid in driving the gas turbine.
Claims11
A method of generating power using a combined cycle system comprising the following steps:
- producing fuel gas having solid fuel particles entrained therein;
- separating said fuel gas from said solid fuel particles;
- burning said solid fuel particles with air in a reactor to produce flue gases having solid particles entrained therein;
- separating said flue gases from said latter solid particles;
- passing said latter solid particles to a heat exchanger for cooling a portion of said latter solid particles;
- passing said cooled portion of said particles and the remaining portion of said particles from said heat exchanger back to said reactor, the ratio of said cooled portion of said particles to said remaining portion of said particles being adjustable to control the temperature of said reactor;
- combusting said fuel gas in the presence of said flue gases in a combustor to produce gaseous products of combustion;
- passing said gaseous products of combustion from said combustor to a gas turbine to drive said turbine and generate electrical energy;
- utilizing heat from the exhaust gases from said turbine to produce steam;
- and
- passing said steam to a steam turbine to drive said steam turbine and produce electrical energy.
A combined cycle power generation system comprising:
- a carbonizer for producing fuel gas having solid fuel particles entrained therein;
- first separating means for substantially separating said fuel gas from said solid fuel particles passing from said carbonizer;
- a pressurized fluidized bed reactor for receiving said solid fuel particles from said first separating means, said reactor burning said solid fuel particles with air to produce flue gases having solid particles entrained therein;
- second separating means for substantially separating said flue gases from said solid particles passing from said reactor;
- a heat exchanger for receiving the separated solid particles from said second separating means and for cooling a portion of said latter particles;
- means for passing said cooled portion of said particles and the remaining portion of said particles from said heat exchanger back to said reactor, the ratio of said cooled portion of said particles to said remaining portion of said particles being adjustable to control the temperature of said reactor;
- a combustor for combusting said fuel gas in the presence of said flue gases to produce gaseous products of combustion;
- a first turbine for receiving and utilizing said gaseous products of combustion to produce torque for the generation of electrical energy;
- means connected to said first turbine for receiving hot exhaust gases from said first turbine and for utilizing said hot exhaust gases to produce steam;
- and
- a second turbine for receiving and utilizing said steam to produce torque for the generation of electrical energy.
Dependencies are inferred from the claim text.