Device for preparing butane and propane employing hydrogenated atmosphere

The utility model discloses a device for preparing butane and propane employing a hydrogenated atmosphere, and belongs to a preparation device of butane and propane. The device is composed of a methanol hydrogen production device, a material hydrogenated refining device and a liquefied gas separating device. As the technical scheme of the utility model, an input pipeline port of the methanol hydrogen production device is respectively connected with a methanol material tank and a water vapor tank; an output pipeline port is connected with the material hydrogenated refining device; the raw material hydrogenated refining device is provided with three input pipeline ports; the other two input pipeline ports are respectively connected with a post aromatic structure C4 material tank and a C4 material tank; the output pipeline port of the material hydrogenated refining device is connected with the liquefied gas separating device; four output pipeline ports are formed on the liquefied gas separating device. By techno