Electrodialyzer is a device that utilizes ion exchange membranes and a direct current electric field to selectively migrate ions from electrolytes in water, thereby achieving water desalination. Abbreviated as ED. The electrodialysis device consists of three chambers: an anode chamber, an intermediate chamber, and a cathode chamber. The middle DD is a well sealed semi permeable membrane, E is a plate or rod shaped electrode such as Pt, Ag, Cu, etc., F is a glass tube connected to the intermediate chamber for washing, and S is a pH meter. Electrodialysis is essentially a desalination technology. In an electrodialysis device, the positive and negative ion exchange membranes have selective permeability. A saline solution is placed inside the device, and under the action of direct current, the positive and negative ions migrate through the membrane to the negative and positive electrodes, respectively. Finally, in the middle chamber between the two membranes, the concentration of salt decreases, while the negative and positive chambers are concentration chambers. The electrodialysis method can dilute, concentrate, separate, or prepare certain electrolytic products for electrolyte solutes or certain substances. In practical applications, more than a hundred pairs of exchange membranes are usually used to improve separation efficiency. During the process of electrodialysis, factors such as ion exchange membrane permeability, ion concentration diffusion, water permeation, and polarization ionization can all affect the separation efficiency. The basic principle of salt removal by electrodialysis is to utilize the selective permeability of ion exchange membranes. The cation exchange membrane only allows cations to pass through, blocking anions to pass through, and the anion exchange membrane only allows anions to pass through. Under the action of an external DC electric field, the ions in the water undergo directional migration, causing most of the ions in one way of water to migrate to another way of ion water, thereby achieving the goal of desalination of saline water