Evaporation device for heat-sensitive materials with high boiling point and high viscosity

Abstract

The invention relates to an evaporation device for a high-boiling-point high-viscosity heat-sensitive material. The evaporation device comprises a feed pump, wherein the feed pump is connected with an inlet at the lower end of a climbing film diameter-variable evaporator; an outlet at the upper end of the climbing film diameter-variable evaporator is connected with an inlet at the upper end of a falling film diameter-variable evaporator; a conical baffle plate is arranged in the falling film diameter-variable evaporator; an outlet at the lower end of the falling film diameter-variable evaporator is connected with an inlet of a steam-liquid separating tank; the upper end of the steam-liquid separating tank is further provided with a steam outlet; and the lower end of the steam-liquid separating tank is provided with an evaporation residue outlet. The evaporation device provided by the invention combines the advantages of the traditional climbing film and falling film evaporators, overcomes the defect of the traditional climbing film and falling film evaporators such as nonuniform in-pipe steam speed, has the advantages of short retention time, uniform material distribution on the evaporation pipe wall, high heat transfer efficiency, low energy consumption, low scaling possibility and the like, and is particularly suitable for evaporation of a high-boiling-point high-viscosity heat-sensitive material in the chemical industry, pharmacy, light industry, environmental protection and biological energy source industry.

Description

technical field [0001] The present invention relates to an evaporation device, more specifically, it relates to an evaporation device for high-boiling point and high-viscosity heat-sensitive materials, in particular to an evaporation device for high-boiling point and high-viscosity heat-sensitive materials in the production process of chemical industry, pharmacy, light industry, environmental protection and biological energy . Background technique [0002] In the process of chemical, pharmaceutical, light industry, environmental protection and bio-energy production, the evaporation process of high-boiling point and high-viscosity heat-sensitive materials such as pharmaceutical intermediates, health care products, biodiesel containing unsaturated bonds, glycerin, and vegetable heavy oil is a process involving high temperature ( The temperature is between 200-300 ℃), vacuum unit operation process. Therefore, the evaporation equipment is required to have the characteristics of...

AI Technical Summary

Problems solved by technology

However, existing evaporation devices such as external circulation evaporators, thin-film evaporators, and multi-effect evaporators have the problems of excessive residence time and uneven distribution of materials in the evaporator during the evaporation process of high-boiling point and high-viscosity heat-sensitive materials. The phenomenon of uneven distribution of material on the wall of the evaporation tube, local dry wall, partial coking, etc., makes the product quality of high-boiling point, high-viscosity heat-sensitive materials not guaranteed.

Images