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电渗析是膜分离技术的一种,是利用离子交换膜的选择透过性,即阳离子交换膜只允许阳离子通过,而阻挡阴离子通过;阴离子交换膜只允许阴离子通过,而阻挡阳离子通过,在外加直流电场的作用下,把电解质从溶液中分离出来从而实现溶液的淡化浓缩、精制等目的。这项技术在锅炉给水脱盐处理中,应用将日趋广泛。1 电渗析水除盐的特点 (1)能耗低在电渗析除盐过程中,只是用外加电场来迁移水中的盐分,而大量的水并不发生相的变化,
Electrodialysis is a membrane separation technology is the use of ion exchange membrane selectivity of the permeability, that is, the cation exchange membrane allows only the passage of cations, and blocking the passage of anions; anion exchange membrane allows only anions, while blocking the passage of cations, plus Under the action of a direct current electric field, the electrolyte is separated from the solution to achieve the purpose of desalination and concentration of the solution and purification. This technology in the boiler feedwater desalination, the application will be more extensive. 1 characteristics of electrodialysis water desalination (1) low energy consumption In the process of desalination by electrodialysis, only the applied electric field to migrate the salt water, and a large number of water does not change the phase,