Carbon dioxide zero-emission system of gas turbine

The invention relates to a carbon dioxide recycling system in a gas turbine, in particular to a carbon dioxide zero-emission system of the gas turbine for air purification and carbon dioxide emission reduction. The carbon dioxide zero-emission system of the gas turbine comprises the gas turbine, an afterheat boiler, a cold circulating pipeline and an integrated gas compressor, wherein high-temperature exhaust gas of the gas turbine is introduced into the afterheat boiler mounted behind the gas turbine for heating feed water to generate steam so as to drive the gas turbine to do work; fuel in the gas turbine is mixed with oxygen from an air-separation oxygen-making device, and dynamic combustion is performed in a combustion chamber of the gas turbine to generate high-temperature and high-pressure gas to push the gas turbine to output power outwards; generated high-temperature and low-pressure gas enters the afterheat boiler, and high-temperature and high-pressure steam generated by the afterheat boiler enters a steam turbine; generated high-purity carbon dioxide tail gas enters the gas compressor, is compressed and is then sent into a carbon dioxide intercooler, and the cooled carbon dioxide gas is compressed by a secondary compressor and then enters a liquid carbon dioxide storage tank.