Abstract: An ion removing system having an ion removing apparatus that includes a fine bubble generating part generating fine bubbles and that causes the fine bubbles to adsorb metal ions to remove the metal ions from the hard water due to supply the fine bubbles generated by the fine bubble generating part into the hard water. In addition, the ion removing system includes a primary-side flow path to supply the hard water to the ion removing apparatus, a separating apparatus that separates crystals of a metal component deposited by crystallizing the metal ions removed from the hard water by the ion removing apparatus, and a secondary-side flow path that takes out, from the separating apparatus, treated water obtained by separating the crystals. The primary-side flow path is provided with a supply-side backflow prevention mechanism.

Abstract: An ion-exchange resin regeneration system includes: salt water flowing means that flows an aqueous sodium chloride solution or an aqueous potassium chloride solution into a container storing ion-exchange resin; and hard water component crystallizing means that crystallizes and removes hard water components containing metal ions from drained water arising from the ion-exchange resin through which the aqueous sodium chloride solution or the aqueous potassium chloride solution has flowed.

Abstract: An ion removal system includes: an electrolysis device configured to generate alkaline water and acidic water by electrolysis; a first flow path and a second flow path through which the alkaline water and the acidic water generated by the electrolysis device are alternately allowed to flow; a hard water flow path connected to the electrolysis device to supply the electrolysis device with hard water; and a fine bubble generation device configured to generate fine bubbles in a flow path upstream or downstream of the electrolysis device, wherein a first flow-rate adjustment valve is connected to the first flow path, and a second flow-rate adjustment valve is connected to the second flow path.

Abstract: An ion removal system includes: an electrolysis device configured to generate alkaline water and acid water by electrolysis; a hard water flow path to supply the electrolysis device with hard water; a first flow path and a second flow path through which the alkaline water and the acid water generated by the electrolysis device can alternately flow; a fine bubble generation device configured to generate and supply fine bubbles to the hard water flow path, the first flow path, or the second flow path so as to adsorb and remove metal ions in water by the fine bubbles generated; and a controller, wherein the controller controls the electrolysis device to perform a first mode in which the alkaline water is allowed to flow through the first flow path and the acid water is allowed to flow through the second flow path and a second mode in which the acid water is allowed to flow through the first flow path and the alkaline water is allowed to flow through the second flow path.

Abstract: An ion removal system includes: an electrolysis device configured to generate alkaline water and acid water by electrolysis; a hard water flow path connected to the electrolysis device to supply the electrolysis device with hard water; a batch treatment tank provided in the hard water flow path to store the hard water; a return flow path connected to the batch treatment tank to return the alkaline water or the acid water generated by the electrolysis device to the batch treatment tank; and a fine bubble generation device configured to generate fine bubbles in a circulation flow path including the batch treatment tank, the electrolysis device, and the return flow path, the fine bubble generation device being configured to adsorb and remove metal ions in water by the fine bubbles generated.

Abstract: Ion removing system includes primary-side ion removing apparatus that includes primary-side hard water storage part storing hard water and primary-side fine bubble generating part generating and supplying fine bubbles to primary-side hard water storage part and that causes fine bubbles to adsorb first metal ions in hard water in primary-side hard water storage part to remove first metal ions from hard water, secondary-side pH adjustment apparatus increasing pH of hard water from which first metal ions are removed by primary-side ion removing apparatus, and secondary-side ion removing apparatus that includes secondary-side hard water storage part storing hard water having pH increased by secondary-side pH adjustment apparatus and secondary-side fine bubble generating part generating and supplying fine bubbles to secondary-side hard water storage part and that causes fine bubbles to adsorb second metal ions in hard water in secondary-side hard water storage part to remove second metal ions from hard water.

Abstract: An ion removal device includes a hard water storage section configured to store hard water; and a fine bubble generation means configured to generate fine bubbles and supply the bubbles to the hard water storage section, wherein, in the hard water storage section, metal ions in the hard water are adsorbed to the fine bubbles to be removed from the hard water.

Abstract: An ion-exchange resin regeneration system includes: salt water flowing means that flows an aqueous sodium chloride solution or an aqueous potassium chloride solution into a container storing ion-exchange resin; and hard water component crystallizing means that crystallizes and removes hard water components containing metal ions from drained water arising from the ion-exchange resin through which the aqueous sodium chloride solution or the aqueous potassium chloride solution has flowed.

Abstract: An ion removal device includes a hard water storage section configured to store hard water; and a fine bubble generation means configured to generate fine bubbles and supply the bubbles to the hard water storage section, wherein, in the hard water storage section, metal ions in the hard water are adsorbed to the fine bubbles to be removed from the hard water.

Abstract: Ion removing system includes primary-side ion removing apparatus that includes primary-side hard water storage part storing hard water and primary-side fine bubble generating part generating and supplying fine bubbles to primary-side hard water storage part and that causes fine bubbles to adsorb first metal ions in hard water in primary-side hard water storage part to remove first metal ions from hard water, secondary-side pH adjustment apparatus increasing pH of hard water from which first metal ions are removed by primary-side ion removing apparatus, and secondary-side ion removing apparatus that includes secondary-side hard water storage part storing hard water having pH increased by secondary-side pH adjustment apparatus and secondary-side fine bubble generating part generating and supplying fine bubbles to secondary-side hard water storage part and that causes fine bubbles to adsorb second metal ions in hard water in secondary-side hard water storage part to remove second metal ions from hard water.

Abstract: An ion removing system includes an electrolysis apparatus electrolyzing hard water to generate acidic water and alkaline water; and an ion removing apparatus that includes a hard water storage part storing the alkaline water generated by the electrolysis apparatus and a fine bubble generating part generating and supplying fine bubbles to the hard water storage part and that causes the fine bubbles to adsorb metal ions in the alkaline water in the hard water storage part to remove the metal ions from the alkaline water.

Abstract: An ion removal system includes: an ion removal device including a hard water storage configured to store hard water and a fine bubble generator configured to generate a fine bubble to supply the hard water storage with the fine bubble, for removing a metal ion from the hard water by adsorbing the metal ion in the hard water to the fines bubble in the hard water storage and crystallizing and precipitating the adsorbed metal ion; and a particle feeder configured to bring a particle containing a same element as that of the metal ion into the hard water at a feeding point, the feeding point being located upstream of the hard water storage or located in the hard water storage.

Abstract: An ion removing system having an ion removing apparatus that includes a fine bubble generating part generating fine bubbles and that causes the fine bubbles to adsorb metal ions to remove the metal ions from the hard water due to supply the fine bubbles generated by the fine bubble generating part into the hard water. In addition, the ion removing system includes a primary-side flow path to supply the hard water to the ion removing apparatus, a separating apparatus that separates crystals of a metal component deposited by crystallizing the metal ions removed from the hard water by the ion removing apparatus, and a secondary-side flow path that takes out, from the separating apparatus, treated water obtained by separating the crystals. The primary-side flow path is provided with a supply-side backflow prevention mechanism.

Abstract: An object of the invention is to provide a hot and cold water mixing device for reducing degradation in the measurement accuracy of a flowmeter. In the device according to the invention, the flowmeter is disposed in one of a hot water supply path and a cold water supply path, having a higher flow rate. At least first and second temperature sensors are individually disposed in at least two of the hot and cold water supply paths and a mixed water path. A hot and cold water adjustment unit adjusts a mixing volume of hot water and cold water based on measurement values of the flowmeter disposed in one of the flow paths having a higher flow rate, a mixed water path flowmeter and at least the first and second temperature sensors.

Abstract: An object of the invention is to provide a hot and cold water mixing device for reducing degradation in the measurement accuracy of a flowmeter. In the device according to the invention, the flowmeter is disposed in one of a hot water supply path and a cold water supply path, having a higher flow rate. At least first and second temperature sensors are individually disposed in at least two of the hot and cold water supply paths and a mixed water path. A hot and cold water adjustment unit adjusts a mixing volume of hot water and cold water based on measurement values of the flowmeter disposed in one of the flow paths having a higher flow rate, a mixed water path flowmeter and at least the first and second temperature sensors.