Methods and apparatus for electrodeionization
a technology of electrodeionization and electrodes, applied in the direction of electrodes, diaphragms, water/sludge/sewage treatment, etc., can solve the problems of increasing the cost of regenerating ion exchange media with concentrated solutions of strong acids or strong bases, and increasing the cost of regenerating ion exchange media. , to achieve the effect of reducing the associated electrode fouling
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example 1
[0083]An EDI device as shown in FIG. 1 was constructed using machined high density polyethylene hardware to retain the electrodes, membranes and material. In this example, the device was substantially cylindrical in shape with a substantially circular cross-section. Other shapes and cross-sections are feasible, but circular was convenient for this example. The internal flow dimensions of the ADC 103 were 1.27 cm in diameter and 3.81 cm in length. The internal flow dimensions of the CBDC 105 were 1.27 cm in diameter and 1.27 cm in length. The internal flow dimensions of the CDC 107 were 1.27 cm in diameter and 3.81 cm in length.
[0084]The anode chamber 101, for this example, contained platinum gauze electrodes (Unique Wire Weaving Inc, Hillside, N.J.). In contact with the anode and separating the anode chamber from the ADC was an anion exchange membrane 102 (AMI-7001S, a product of Membranes International, Glen Rock, N.J.). The ADC was filled with an anion exchange resin (DOWEX™ 1×4 (...
example 2
[0120]An EDI device as shown in FIG. 2B was constructed using machined high density polyethylene hardware to retain the electrodes, membranes and resin. The internal flow dimensions of the ACBDC 203 were 1.27 cm in diameter and 1.27 cm in length. The ADC 205 was 1.27 cm in diameter and 3.81 cm in length. The internal flow dimensions of the CBCC 207 were 1.27 cm in diameter and 1.27 cm in length. The internal flow dimensions of the CDC 209 were 1.27 cm in diameter and 3.81 cm in length. The internal flow dimensions of the CCBDC 211 were 1.27 cm in diameter and 1.27 cm in length.
[0121]The anode chamber 201, for this example, contained platinum gauze electrodes (Unique Wire Weaving Inc, Hillside, N.J.). In contact with the anode and separating the anode chamber 201 from the ACBDC 203 was an anion exchange membrane 202 (AMI-7001S, a product of Membranes International, Glen Rock, N.J.). The ACBDC contained a homogenous mixture of cation exchange resin (DOWEX™ 50W×4 (200 mesh), a product ...
example 3
[0186]An EDI device as shown in FIG. 4A was constructed using machined high density polyethylene hardware to retain the electrodes, membranes and resin. The internal flow dimensions of the ADC 407 were 1.27 cm in diameter and 3.81 cm in length. The internal flow dimensions of the CBCC 405 were 1.27 cm in diameter and 1.27 cm in length. The internal flow dimensions of the CDC 403 were 1.27 cm in diameter and 3.81 cm in length. The internal flow dimensions of the CCBDC 409 were 1.27 cm (diameter) and 1.27 cm (length). All cation materials were in the hydronium form and all anion materials were in the hydroxide form.
[0187]The anode chamber 401, for this example, contained platinum gauze electrodes (Unique Wire Weaving Inc, Hillside, N.J.). In contact with the anode and separating the anode chamber 401 from the ADC 403 was a cation exchange membrane 402 (CMI-7000, a product of Membranes International, Glen Rock, N.J.). The CDC 403 was filled with a cation exchange resin (DOWEX™ 50W×4 (2...
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