Patent ID: 6370865
Filing Date: 2002-04-16
Classification: F02C,F23J,Y02E

Abstract:
A thermal power plant comprising:an air compressor which compresses a sucked air to generate a high pressure air; a gas turbine combustor operatively connected to the air compressor and adapted to supply a fuel to the high pressure air from the air compressor to generate a combustion gas; a high pressure gas turbine operatively connected to the gas turbine combustor and adapted to perform an expansion working of the combustion gas from the gas turbine combustor and generate an exhaust gas; a low pressure gas turbine operatively connected to the high pressure gas turbine and adapted to perform an expansion working of the exhaust gas from the high pressure gas turbine and generate an exhaust gas containing carbon dioxide; and a carbon dioxide absorbing and discharging equipment located on an outlet side of the low pressure gas turbine, said carbon dioxide absorbing and discharging equipment being provided with a carbon dioxide absorbing and discharging agent having a property of absorbing the carbon dioxide contained in the exhaust gas supplied from the low pressure gas turbine in a manner which forms a carbonate, said carbon dioxide absorbing and discharging equipment being arranged to decompose the carbonate using the exhaust gas supplied from the high pressure gas turbine, wherein a temperature of the gas turbine exhaust gas supplied from the high pressure gas turbine to the carbon dioxide absorbing and discharging equipment and a temperature of the exhaust gas supplied from the low pressure gas turbine to the carbon dioxide absorbing and discharging equipment are set to pre-determined ranges of values different from each other, and wherein the carbon dioxide in the gas turbine exhaust gas supplied from the low pressure gas turbine is absorbed by the carbon dioxide absorbing agent and discharging equipment and wherein the gas turbine exhaust as supplied from the high pressure gas turbine decomposes the carbonate in the carbon dioxide absorbing and discharging equipment.