Multi-stage reflux fine process based on aromatic hydrocarbon rectification and rectification equipment

The invention relates to the technical field of rectification equipment, and provides a multistage reflux fine process based on aromatic hydrocarbon rectification and rectification equipment. An upper distillation pot and a lower distillation pot are arranged in a rectification tank, a condensation reflux assembly is additionally arranged at the top end of the upper distillation pot, and the lower distillation pot is used for primarily heating and distilling a raw material mixture; the generated aromatic hydrocarbon molecule steam moves upwards, most of the aromatic hydrocarbon molecule steam is intercepted by the condensation reflux assembly and is condensed and refluxed into the upper distillation pot for secondary heating distillation, and a small amount of aromatic hydrocarbon molecules continue to move upwards along the rising space and rise together with aromatic hydrocarbon molecules which are combusted in the upper distillation pot and overflow from the upper reflux cover; and in the process, part of