Composite electrochemical brackish water desalination system combining electrodialysis and capacitive deionization process

摘要

The present invention is an electro-desalination technology, by constructing a multi-stage complex process in which demineralized water, which firstly reduced the high-concentration inflow TDS concentration by using the electrodialysis membrane method at the front end, as the influent water by the capacitive electrosorption method at the rear end, is economically and efficiently It relates to a complex electrochemical brackish water desalination system in which an electrodialysis and capacitive electrosorption desalination process are combined to treat fresh water quality level of TDS concentration of 500 mg/L or less, and in detail, a raw water tank in which raw water is stored; An ED treatment unit for separating and discharging concentrated water that is desalted from the raw water while the raw water is introduced into the raw water tank and the batch-type circulation and the salt concentration of the raw water stored in the raw water tank is first desalted through an electrodialysis method; And demineralized water from the raw water tank having the first salt concentration treated by the ED treatment unit is introduced, and the remaining ions are adsorbed/desorbed from the demineralized water introduced through the capacitive electrosorption method to a predetermined final target water quality, and the treated water is externally absorbed. Characterized in that it includes; CDI processing unit discharged to the.