Direct air carbon capture system and control method

The invention provides a direct air carbon capture system and a control method, and belongs to the technical field of carbon capture. The system comprises a trapping device which is used for absorbing carbon dioxide from air by utilizing barren liquor conveyed from a regeneration device to form rich liquor and conveying the rich liquor to the regeneration device, and the trapping device comprises a gas compression device and a mixed absorption device which are connected with each other, the gas compression device is used for compressing gas and conveying the compressed gas to the mixed absorption device, and the mixed absorption device is used for mixing barren liquor and the compressed gas to form rich liquor; the regeneration device is connected with the mixed absorption device and is used for heating the rich liquor to generate carbon dioxide and barren liquor and conveying the formed barren liquor to the mixed absorption device; and the storage device is connected with the exhaust port of the regeneration