Quick, efficient and flexible pervaporation dehydration system and dehydration extraction method based on pervaporation dehydration system

Abstract

The invention discloses a quick, efficient and flexible pervaporation dehydration system and a dehydration extraction method based on the pervaporation dehydration system. The system comprises a circulation tank, a heater, a material and liquid pump and a pervaporation membrane separator, the heater is installed in a raw material liquid tank and located below the raw material liquid level of the circulation tank, and an outlet of the circulation tank is connected with an inlet of the material and liquid pump; an outlet of the material and liquid pump is connected with an inlet of the pervaporation membrane separator, a lateral raw material outlet of the pervaporation membrane separator is connected with an inlet in the upper end of the circulation tank, a lateral permeation outlet of the pervaporation membrane separator is connected with a condenser, and the other outlet of the condenser is connected with a vacuum pump. The designed membrane pervaporation separation system is wider andmore flexible in application range and suitable for dehydration purification of multiple materials and reduces the equipment investment cost, commercial popularization is convenient, the concentration polarization phenomenon generally existing at the raw material side in a traditional pervaporation technology is greatly reduced and even completely eliminated, the separation efficiency of a membrane assembly is improved, and the application range is wider and more flexible.

Description

technical field [0001] The invention relates to the technical field of separation, in particular to a fast, efficient and flexible pervaporation dehydration system and a dehydration method thereof. Background technique [0002] The separation and purification of organic solvents is one of the common unit processes in the fields of petrochemicals, fine chemicals, pharmaceutical chemicals, and daily chemicals. The demand for deep dehydration of organic solvents is also increasing in industries such as new energy and electronics; organic solvents The traditional separation methods are rectification and other processes, but when the organic solvent mixture forms an azeotropic system, it is necessary to use azeotropic distillation, extractive distillation, or introduction of molecular sieve adsorption for deeper separation and purification; these processes consume high energy consumption, The pollution is serious and the equipment is complicated, and the direct discharge of the e...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a fast, efficient and flexible pervaporation dehydration system and a dehydration purification method based on the system, so as to solve the problems of low feed-liquid flow rate, serious concentration polarization and low-efficiency operation of the existing solution dehydration system. problems, and the design is simple, less investment in equipment, easy to operate, easy to scale up

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