| 摘要 |
PURPOSE:To efficiently remove TOC eluting from a non-regeneration type mixed bed system ion exchanger of a secondary treatment system by basically installing an anion exchange resin single bed exchanger of a non-regeneration type in the rear stage of the mixed bed system ion exchanger. CONSTITUTION:This ultra-pure water producing apparatus treats the water treated in a primary treatment system further with the secondary treatment system having the mixed bed ion exchanger of the non-regeneration system. In such a case, the anion exchange resin single bed exchanger of the nonregeneration type is installed in the rear stage of the mixed bed ion exchanger. For example, the primary treatment system is composed of a regeneration type cation exchange column K, a decarbonation column D, a regeneration type anion exchange column A, a reverse osmosis treatment RO and the regeneration type mixed bed ion exchange column MB. The secondary treatment system is composed of a UV sterilization device UVST, the non-regeneration type ion exchange device, the non-regeneration type anion exchange resin single bed ion exchange device, an ultrafilter membrane device UF and a storage tank TK. |
