Benzene tower parallel heat exchange device based on aromatic hydrocarbon separation unit

The utility model discloses a benzene tower parallel heat exchange device based on an aromatic hydrocarbon separation unit, which comprises a benzene tower, a condensed water reboiler, a steam reboiler, a medium-pressure steam condensed water output part and a low-pressure steam output part, and the medium-pressure steam condensed water output part outputs medium-pressure steam condensed water; the low-pressure steam output part outputs low-pressure steam; wherein the bottom oil of the benzene tower and the medium-pressure steam condensation water are subjected to heat exchange in the condensation water reboiler and then return to the benzene tower; bottom oil of the benzene tower and the low-pressure steam are subjected to heat exchange in the steam reboiler and then return to the benzene tower. According to the benzene tower parallel heat exchange device based on the aromatic hydrocarbon separation device, low-pressure steam or medium-pressure steam condensation water is utilized or alternately utilized at