Method for continuously vacuum volatilizing and separating azeotrope and device

Abstract

The invention relates to a method and a device which are used for separating azeotrope by continuous vacuum volatilization. In the method, by the operation in vacuum, the heating temperature of a system is lower than bubble point of an article to be separated so as to avoid the boiling of the article; according to the difference of volatilization speed and diffusion speed between components, azeotropic limit is broken through, thus achieving the separation object. Furthermore, the volatile area is increased by a filing material layer, a mass transfer process is reinforced, and a testing deviceof continuous vacuum volatilization separation method is established. Compared with existing azeotrope separation method, the method of the invention has the advantages of requiring no third component, friendly environment, simple equipment, convenient operation and low energy consumption. The method of the invention is suitable for the separation of azeotropic mixture.

Description

technical field [0001] The invention relates to azeotrope separation, in particular to a method and device for continuous vacuum volatilization and separation of azeotrope. Background technique [0002] In fine chemical, pharmaceutical and other industries, many azeotropic systems are often involved, and it is difficult to achieve effective separation by ordinary distillation. The current extractive distillation, azeotropic distillation, salt-added extractive distillation, etc. need to add a third component, and there are problems in the screening of the third component and in the separation process and subsequent treatment of the third component. Difficulties of varying degrees; especially in industries such as pharmaceuticals, product quality requirements generally have strict control over the residual amount of the third component added, thereby limiting the use of these separation methods. Although pressure swing distillation does not use a separating agent, the integra...

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Problems solved by technology

[0002] In fine chemical, pharmaceutical and other industries, many azeotropic systems are often involved, and it is difficult to achieve effective separation by ordinary distillation

The current extractive distillation, azeotropic distillation, salt-added extractive distillation, etc. need to add a third component, and there are problems in the screening of the third component and in the separation process and subsequent treatment of the third component. Different degrees of difficulty; especially in industries such as pharmaceuticals, product quality requirements generally have strict control over the residual amount of the third component added, thus limiting the use of these separation methods

Although pressure swing rectification does not use a separating agent, the integration of multiple towers not only increases the equipment cost, but also increases the complexity of the device, requiring a higher level of control

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