4results about "Electric regeneration" patented technology

To provide a water softening device that enables efficient regeneration of ion exchange resins. [Solution] The water softening device comprises a water softening chamber 209 that generates softened water, a neutralization chamber 210 that neutralizes the softened water, an inner circumferential diaphragm 215, a water intake section 203 that introduces raw water, a water supply section 204 that supplies the neutralized softened water to the outside, a first electrode 201, and a second electrode 202. Furthermore, the water softening chamber 209, the inner circumferential diaphragm 215, the neutralization chamber 210, and the water supply section 204 are arranged in the order of the water intake section 203 having a central axis perpendicular to the bottom surface of the water softening chamber 209, and outward in the direction of the outer circumference of a circle centered on the central axis. The weakly acidic cation exchange resin 213 includes a first weakly acidic cation exchange resin 213a and a second weakly acidic cation exchange resin 213b that has a higher acidity dissociation constant than the first weakly acidic cation exchange resin 213a. The first weakly acidic cation exchange resin 213a is located closer to the first electrode 201 than the second weakly acidic cation exchange resin 213b.

Water softening system includes water softening tank, neutralization tank, electrolysis tank, and treatment tank. Water softening tank softens raw water containing a hardness component with weakly acidic cation exchange resin. Neutralization tank neutralizes a pH of soft water that has flowed through water softening tank with weakly basic anion exchange resin. Electrolysis tank generates acidic electrolyzed water for regenerating weakly acidic cation exchange resin of water softening tank and alkaline electrolyzed water for regenerating weakly basic anion exchange resin of neutralization tank. Treatment tank mixes the acidic electrolyzed water that has flowed through water softening tank and the alkaline electrolyzed water that has flowed through neutralization tank, and supplies the mixture of the acidic electrolyzed water and the alkaline electrolyzed water to electrolysis tank.

A water softening device (100) is provided with: a water softening chamber (201) having a weakly acidic cation exchange resin (101) and generating soft water from raw water containing a hard component; a neutralization chamber (202) that has a weakly alkaline anion exchange resin (102) and neutralizes the soft water; a diaphragm that partitions between the water softening chamber (201) and the neutralization chamber (202) such that soft water can pass therethrough; a first electrode (103) that functions as an anode during regeneration of the weakly acidic cation exchange resin (101); and a second electrode (104) that functions as a cathode during regeneration of the weakly alkaline anion exchange resin (102). The first electrode (103) is provided in the water softening chamber (201) so as to be surrounded by a weakly acidic cation exchange resin (101), and the second electrode (104) is provided in the neutralization chamber (202) so as to be surrounded by a weakly alkaline anion exchange resin (102).

The application discloses a device and system for electrically regenerating exhausted ion exchange resin, which comprises a membrane stack, cathode and anode zone assemblies on both sides of the membrane stack, and a fastening mechanism for compactly fixing the membrane stack and the zone assemblies. The membrane stack is arranged in the order of anode membrane, resin frame plate, cathode membrane, and concentrated water partition plate from the end of the cathode zone assembly to the end of the anode zone assembly, and finally ends with anode membrane, resin frame plate, and cathode membrane; the middle area of the resin frame plate is provided with a plurality of cavities penetrating through the front and back surfaces and parallel to each other, and the cavities and the membranes on both sides form regeneration chambers, and the non-penetrating areas between adjacent regeneration chambers are used as support strips; resin inlet and outlet flow channels and fresh water inlet and outlet flow channels are independently arranged in each regeneration chamber of the resin frame plate, and the resin inlet and outlet flow channels and the fresh water inlet and outlet flow channels are independent of each other. The system comprises two or more than two devices and auxiliary facilities arranged in parallel. The device is convenient for large-scale production and does not need to be disassembled during the process of loading and discharging resin.