METHOD OF REMOVING SULFATE ION IN SALT WATER

摘要

PROBLEM TO BE SOLVED: To smoothly perform continuous operation and to reduce the time required for treatment by continuously transporting a zirconium hydroxide- carrying ion exchange resin in a slurry to circulate and performing simultaneously the adsorption reaction and the desorption reaction of sulfate ion in a sulfate ion-containing salt water.;SOLUTION: The absorbed sulfate ion is desorbed from the zirconium hydroxide-carrying ion exchange resin in a desorption reaction vessel 1. The zirconium hydroxidecarrying ion exchange resin slurry regenerated therein is sent to a prestage separator 5 of a solid-liquid separation device 20. Solid- liquid separation-cleaning-transportation to the adsorption reactor 7 are carried out in the prestage separator 5. Sulfate ion is adsorbed and removed from the salt water in the adsorption reactor 7 and the zirconium hydroxide-carrying ion exchange resin slurry on which sulfate ion is absorbed is sent to a poststage separator 8 of the solid-liquid separation device 20. In the poststage separator 8, each process of solid-liquid separation-cleaning-transportation to the adsorption reaction vessel 1 are continuously carried out in this order. As a result, the time required for treating is reduced.;COPYRIGHT: (C)2001,JPO