Thermal power plant

摘要

A thermal power plant comprises: an air compressor (2) which compresses a sucked air to generate a high pressure air; a gas turbine combustor (4) adapted to supply a fuel to the high pressure air from the air compressor (2) to generate a combustion gas; a high pressure gas turbine (5) adapted to perform an expansion working of the combustion gas from the gas turbine combustor (4) and generate an exhaust gas; a low pressure gas turbine (6) and adapted to perform an expansion working of the exhaust gas from the high pressure gas turbine (5) and generate an exhaust gas containing carbon dioxide; and a carbon dioxide absorbing and discharging equipment (7) located on an outlet side of the low pressure gas turbine (6), the carbon dioxide absorbing and discharging equipment (7) 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 (6) and decomposing the absorbed carbonate by the exhaust gas supplied from the high pressure gas turbine (5). A temperature of the gas turbine exhaust gas supplied from the high pressure gas turbine (5) to the carbon dioxide absorbing and discharging equipment (7) and a temperature of the exhaust gas supplied from the low pressure gas turbine (6) thereto are set to predetermined range of values different from each other. <IMAGE>