Improved electric desalting device and method of scaling resistance

摘要

An anode compartment with an anode is provided, and separated from the anode compartment and a cathode compartment the cathode is provided, the cathode and the anode is configured to be coupled to the DC power supply, electrical deionization apparatus, between them and resulting in a potential difference, to affect the transport of ions in the ion exchange material medium and liquid medium due to the influence of the potential difference. An electric deionization apparatus, and a cation exchange membrane and a plurality of anion exchange membranes being alternately arranged between the feed inlet to receive the feed solution, and the product water outlet of the cathode compartment and an anode compartment . Also includes a plurality of spacers, cation exchange membranes and anion exchange membranes and spacers of these electrical deionization apparatus of the serial dilutions first compartment to receive the feed solution from the feed inlet, the dilution compartment of the first, and is configured to form dilute the second compartment to pass the product water outlet product water, the concentration compartment and the second compartment is concentrated first. The dilute compartments of the first and second boundaries are defined by a cation exchange membrane on the side nearest the cathode and the anion exchange membrane on the side nearest to the anode. The concentrating compartment of the first and second boundaries are defined by anion exchange membrane on the side nearest the cathode and the cation-exchange membrane on the side nearest to the anode. [Selection Figure Figure 3