Device and method for directly preparing gasoline fraction hydrocarbon through carbon dioxide hydrogenation

The invention discloses a device and method for directly preparing gasoline fraction hydrocarbon through carbon dioxide hydrogenation and relates to the technical field of gasoline production. The device comprises a carbon dioxide feed pipe, a hydrogen feeding pipe, a feeding and product heat exchanger, a heater I, a hydrogenation reactor, a cooler, a cryogenic device, a high-pressure separation tank I, a pressure reducing valve I, a product separation tank, a pressure reducing valve IV, a light component removal tower, a product conveying pump, a heater II, a circulating compressor I, a circulating compressor II, a reboiler, a condenser, a pressure reducing valve III and a switch valve. The device and the method for directly preparing gasoline distillate hydrocarbon by carbon dioxide hydrogenation have the advantages of simple reactor type, short flow, low equipment investment and low energy consumption, high-quality clean gasoline fuel can be directly obtained by a one-step method, can be directly used as f