重油常减压蒸馏装置是为分离原重油而开发研制的一种蒸馏装置，能够将25度至550度沸点范围的馏份按要求进行切割，装置分为常压蒸馏塔、减压蒸馏塔，蒸馏塔头上切割的饱和蒸汽温度为≤400度，系统真空度可达1.0pa.
Heavy oil atmospheric and vacuum distillation unit;
    　The heavy oil atomospheric and vacuum distillation unit ys a distillation unit developed to separate the heavy oil from crude oil ,can cut fraction ys the range of boiling point of 25.cand 550.c according to the requirement ,incuds atmospheric tower ,vacuum tower ,the maximum temperature of saturated steam of the top is 400度 ,the vacuum degree of the system can be up to 1.0pa.