Material supply system with double rectification devices and method

Abstract

The invention belongs to the technical field of distillation, and discloses a material supply system with double rectification devices and method. The material supply system with double rectificationdevices is provided with a first rectification device and a second rectification device, wherein the first rectification device, the second rectification device, a raw material preparation tank, a residue liquid recycling tank, pipelines and valves form the material supply system; respiration valves are respectively arranged at the top ends of the raw material preparation tank and the residue liquid recycling tank and are used as air ventilation devices, so as to ensure that the pressure in the tank is maintained at the normal state; a blowdown valve is arranged at the bottom of each tank. Thematerial supply system with the double distillation devices has the advantages that the residue liquid produced in the production process is recycled by the first rectification device and the secondrectification device, and is returned back into the material supply system through a sealed conveying pipe to reach the repeated utilization purpose, thereby realizing the purposes of safety, environment protection and zero drainage; by arranging the first rectification device and the second rectification device to complete rectification, the rectification purity is greatly improved; the residue liquid is recycled by the residue liquid recycling tank, so that the utilization rate of resources is greatly improved, and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of distillation, and in particular relates to a feeding system and method for a double rectification device. Background technique [0002] Rectification is a distillation method that uses reflux to separate liquid mixtures with high purity. It is the most widely used liquid mixture separation operation in industry, and is widely used in petroleum, chemical, light industry, food, metallurgy and other departments. Distillation operations are classified in different ways. According to the operation mode, it can be divided into continuous distillation and batch distillation; according to the number of components of the mixture, it can be divided into binary distillation and multi-component distillation; according to whether additives that affect the vapor-liquid balance are added to the mixture, it can be divided into ordinary distillation. Rectification and special distillation (including extractive distillati...

AI Technical Summary

Problems solved by technology

[0003] To sum up, the existing problems in the prior art are: the raw material batching system of the existing rectification device is unreasonable, the residual material after use is directly removed, and there are still active ingredients in the residual material, which is easy to cause waste of resources, and the rectification purity is not high. high

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