Recycling method and recycling device for flash steam of synthesis ammonia

The invention relates to a recovery method and a recovery device for flash steam of synthesis ammonia, and belongs to the technical field of chemical engineering. A flash steam outlet of liquid ammonia filling equipment and an additional recovery pipeline are connected into an inlet of an ammonia-preserving ice machine, ammonia gas is compressed into liquid ammonia by the ammonia-preserving ice machine, and then the liquid ammonia enters a flash tank to be recovered; and the separated liquid ammonia enters the liquid ammonia spherical tank, and filling operation can be continued. The invention further provides a recovery device for implementing the recovery method. The dangerous chemical truck loading device is wide in application range and high in safety, truck loading operation is conducted by fully utilizing the pressure difference of equipment, the electricity consumption of a truck loading pump in the truck loading period is reduced, the pipeline truck loading pressure is reduced, and potential safety ha