Vegetable acid oil harmless recovery treatment process utilizing multi-tower continuous vacuum rectification

The invention relates to the technical field of environmental protection industry, in particular to a harmless recovery treatment process for plant acid oil by utilizing multi-tower continuous vacuum rectification, which comprises the following steps of: introducing a material flowing out from the bottom of a multi-effect high-vacuum evaporator into a continuous vacuum rectification device for continuous treatment; according to the invention, a plurality of rectifying towers are arranged to carry out continuous vacuum rectification treatment on the plant acid oil, so that the production wastewater generation amount of the plant acid oil is reduced to the greatest extent; according to the device, the heat exchange assembly is arranged above the feeding mechanism, preheating of plant acid oil during feeding is achieved through the heat exchange assembly, meanwhile, cooling is conducted when a rectification product is sent out, heat generated during rectification is recycled, and therefore the effect of saving e