Bipolar membrane electrodialysis system

NegotiableUpdate on 04/07

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Overview

The bipolar membrane electrodialysis system equipment ion exchange membrane is a thin film made of polymer materials with ion exchange groups. The reason for its selective permeability is mainly due to the porosity of the membrane and the action of ion groups on the membrane.

Product Details

　 Bipolar membrane electrodialysis systemBipolar membrane is a new type of ion exchange composite membrane, which is usually composed of a cation exchange layer and an anion exchange layer. Membrane materials with different charge densities, thicknesses, and properties can be used to make bipolar membranes with different properties and applications under different composite conditions. The basic principle of these applications is the dissociation of water molecules at the interface layer of the bipolar membrane under reverse pressure (also known as bipolar membrane hydrolysis), which decomposes water into hydrogen ions and hydroxide ions.

It is developed based on the principles of water dissociation and ordinary electrodialysis mentioned above. It is composed of a bipolar membrane replacing some of the negative and positive membranes of ordinary electrodialysis or adding a bipolar membrane between the negative and positive membranes of ordinary electrodialysis.

The basic application is to prepare corresponding acids (HX) and bases (MOH) from salt solution (MX), and the feed solution enters the three chamber electrodialysis membrane stack. Under the action of a direct current electric field, salt anions (X -) enter the acid chamber through the anion exchange membrane and dissociate with hydrogen ions from the bipolar membrane to generate acids (HX);

And the salt cation (M+) enters the base chamber through the cation exchange membrane, where it dissociates with the hydroxide ions of the bipolar membrane to form a base (MOH).

　　Bipolar membrane electrodialysis systemWhat are the basic conditions for desalination of electrodialysis equipment? Today we will provide you with a detailed explanation to help you solve your doubts and operate electrodialysis equipment more smoothly.

1. Ions in water are charged, and in direct current, anions and cations will undergo directional migration. According to the principle of repulsion between homosexuals and attraction between heterosexuals, cations move towards the cathode while ions move towards the anode.

2. Ionic exchange membranes have selective permeability and can be divided into two types: cation exchange membranes and anion exchange membranes. Positive membranes only allow cations in water to pass through and block anions, while negative membranes only allow anions in water to pass through and block cations. Why do ion exchange membranes have selective permeability? Ion exchange membrane is a thin film made of polymer materials with ion exchange groups. The reason for its selective permeability is mainly due to the porosity of the membrane and the effect of ion groups on the membrane.