Thermal power plant

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;
• a plurality of carbon dioxide absorbing and discharging equipments located on an outlet side of the low pressure gas turbine, each of said carbon dioxide absorbing and discharging equipments 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 and decomposing the absorbed carbonate by the exhaust gas supplied from the high pressure gas turbine;
• and
• a change-over system operatively connected to the carbon dioxide absorbing and discharging equipments and adapted to change over the carbon dioxide absorbing and discharging equipments.