Device and method for separating isotropic ions different in valence

Abstract

The invention discloses a device and method for separating isotropic ions different in valence. The device comprises a separation film, a plurality of micro channels consistent in mutual orientation are arranged on the separating film, the diameter of the mutual channels ranges from 10 micrometers to 100 micrometers, a stock solution area communicated with the inlet ends of the micro channels is arranged at one side of the separation film, and a separation area connected with the outlet ends of the micro channels is arranged at the other side of the separation film. A negative / positive ion exchange film is arranged on the inner wall of each micro channel, a second electrode is arranged on the side, opposite to the separation area, of the separation film, a first electrode and the second electrode are used for generating field strength covering the field strength direction of the micro channels from the separation area to the stock liquid area, and a third electrode is arranged on the negative / positive ion exchange film. The device and method have the advantages that only the requirement for the hundred-micron aperture is needed, operation pressure and manufacturing difficulty are lowered, therefore, the separation cost is reduced, and industrial popularization is promoted.

Description

technical field [0001] The invention relates to industrial fields such as industrial wastewater treatment, batteries, biomedicine, ion separation, etc., especially in water treatment equipment, to separate heavy metal ions or certain specific ions, specifically to a separation device for ions of the same sex and different valences and its Separation method. Background technique [0002] Since the 1990s, countless researchers have never stopped exploring the separation technology of ions with different valences. It is worth mentioning that membrane technology is the most widely used separation method today, mainly including: nanofiltration and electrodialysis . The operating pressure of the nanofiltration method is high (1~10Mpa), because the surface pore size of the nanofiltration membrane is in the nanometer range. However, due to the special structure of the nanofiltration membrane itself, its separation performance is not only related to the properties of the membrane m...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome technical problems such as the high operating pressure of the nanofiltration method in the prior art and the expensive preparation of the nanofiltration separation membrane, and propose a separation device for ions of the same sex and different valences. pressure and manufacturing difficulty, thereby reducing the cost of separation and facilitating industrial promotion

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