Nash vacuum pump suitable for liquid chlorine packaging

The invention discloses a Nash vacuum pump suitable for liquid chlorine packaging, and belongs to the technical field of chemical equipment. An impeller can rotate in a gap between a front distribution plate and a rear distribution plate and drive sulfuric acid, the sulfuric acid is attached to a cylinder under the action of centrifugal force, and meanwhile, the sulfuric acid forms a circular ringin an inner cavity of the cylinder; and a nitrogen supplementing pipeline communicated with the cylinder is installed at the outer side wall of the cylinder, the pressure of the vacuum pump can be controlled by adjusting the nitrogen inflow of the nitrogen supplementing pipeline, normal use of the vacuum pump and normal circulation of concentrated sulfuric acid are guaranteed, and a gas-liquid separator is connected with a sewage disposal treatment assembly through a pipeline. Due to the fact that under some conditions, the pressure in a sewage disposal treatment tank is increased to enable alkali liquor to flow back