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The EDR/BMED system is composed of electrodialysis body, rectifier and automatic pole reversal system.
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ShanghaiThe cathode and cation exchange membranes are arranged alternately between the positive and negative electrodes and separated by a special separator to form two desalination and concentration systems. During operation, the electrode is reversed continuously to remove the polluted ions in the water and reduce the pollution of the bivalent ions to the membrane, which prolongs the service life of the ion exchange membrane. EDR technology uses a highly efficient diffusion film, which can highly concentrate the salt up to 20%, greatly reducing the energy consumption required for subsequent evaporation. At the same time, the monovalent ion selection can be customized according to the needs of users to achieve two-valent ion separation through the membrane to achieve the purpose of salt classification and recovery.
● Low energy consumption: the film surface resistance is low, and the running energy consumption is only 30~50% of the ordinary heterogeneous film.
● High concentration: membrane ion mobility > 0.96, concentration design range up to 50 times, concentration up to 20%.
● Can be used for impurity salt separation: special membrane can achieve two-valent ion separation.
● Separation of salt and organic impurities: organic matter is difficult to pass through the ion exchange membrane.
● Long membrane service life: Proper pretreatment and operation management, membrane life can reach 3~4 years or even longer.
Cases
Project：Sodium sulfate concentration
Process：NF+EDR
Medium：3% Na2SO4
Capacity：200T/D
Description：3% Na2SO4 being concentrated to12%
The EDR/BMED system is composed of electrodialysis body, rectifier and automatic pole reversal system.
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