An experimental device for measuring liquid-liquid mass transfer coefficient

Abstract

The invention provides an experimental device for measuring a liquid-liquid mass transfer coefficient. The experimental device comprises a glass kettle with a jacket-shaped structure, an upper flange, a lower flange and an interface ring, wherein the upper flange and the lower flange are fixedly connected with the upper and lower ends of the glass kettle; the interface ring is arranged at the vertical middle position of an inner cavity of the glass kettle; an upper stirring paddle and a lower stirring paddle which are coaxial with the glass kettle and are driven by motors are arranged in an upper cavity and a lower cavity which are formed by partitioning the glass kettle by the interface ring; a plurality of through holes are distributed around a center hole of the interface ring; central radial baffles are arranged between the upper and lower ends of the inner cavity of the glass kettle and the center hole of the interface ring respectively; a jacket layer of the reaction kettle is connected with a constant-temperature water tank by virtue of a constant-temperature water inlet and a constant-temperature water outlet; the outer walls of the reaction kettle are respectively provided with sampling holes which are communicated with the upper and lower cavities of the glass kettle; a stirring shaft of the upper stirring paddle is arranged on the upper flange of the reaction kettle; the upper flange is provided with a sample inlet and a thermometer insertion opening; a stirring shaft of the lower stirring paddle is arranged on the lower flange of the reaction kettle, and the lower flange is provided with a liquid discharge hole.

Description

Technical field [0001] The invention belongs to the field of teaching, scientific research and experimental technology and equipment, and particularly relates to an experimental device suitable for mass transfer theory research and teaching experiment for measuring liquid-liquid mass transfer coefficient. Background technique [0002] The efficiency of the actual extraction equipment and how to improve its efficiency are issues of great concern to people. In order to solve these problems, it is necessary to study the factors and laws that affect the mass transfer rate, as well as the mechanism of the mass transfer process. In recent decades, although people have studied the dynamics of the two-phase interface, the transfer mechanism of matter through the interface and the resistance of the phase interface to the transfer process, many problems have been caused due to the complexity of the liquid-liquid mass transfer process. It has not been satisfactorily answered, and some engi...

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Problems solved by technology

Le Shantang and others described the constant interface pool in detail in the article "Rare Earth Solvent Extraction Kinetics and Research Methods", but the structure of these designs is relatively complicated, and most of the two-phase independent stirring in these devices adopts a sleeve Shaft structure, the stirring shaft of the lower heavy phase must pass through the two-phase interface, which is not conducive to the stability of the interface

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