Improved C9 rectification device

The utility model belongs to the field of chemical production equipment, and particularly relates to an improved C9 rectification device, a lifting unit realizes separation and combination of a tank cover and a rectification tank body, a stirring unit comprises a stirring shaft and a vertical stirring arm, and an upper fixing ring, a sliding ring A, a middle fixing ring, a sliding ring B and a lower fixing ring are sequentially arranged on the stirring shaft from top to bottom; the upper portion and the lower portion of the screw are rotationally connected with the upper fixing ring and the lower fixing ring correspondingly, and the sliding ring A and the sliding ring B are both in threaded connection with the screw. An upper hinge lug and a lower hinge lug are arranged on the vertical stirring arm, the upper hinge lug and the upper fixing ring are hinged to the two ends of a stirring rod A respectively, and the upper hinge lug and the sliding ring A are hinged to the two ends of a stirring rod B respectively