Temperature and pressure swing adsorption device and method for capturing carbon dioxide in flue gas

The invention discloses a temperature and pressure swing adsorption device and method for capturing carbon dioxide in flue gas. The adsorption device comprises a solar generator, a solar refrigerator, a solar heat collector, an organic Rankine cycle generator, a flue gas pressurization and cooling subsystem, a carbon dioxide adsorption subsystem, a carbon dioxide desorption subsystem and a carbon dioxide liquefaction subsystem. The solar power generator provides electric energy required by the subsystem, the solar refrigerator provides cold energy required by condensation gas carbon dioxide of the carbon dioxide liquefaction subsystem, and the solar heat collector heats carbon dioxide gas by utilizing heat-conducting oil, provides heat for regeneration of the subsystem and stores solar heat energy generated in the daytime; the organic Rankine cycle power generator is used for replacing a solar power generator at night and is matched with the carbon dioxide liquefaction subsystem to drive the subsystems to con