| 摘要 |
PCT No. PCT/CN95/00021 Sec. 371 Date Dec. 23, 1996 Sec. 102(e) Date Dec. 23, 1996 PCT Filed Mar. 30, 1995 PCT Pub. No. WO95/26821 PCT Pub. Date Oct. 12, 1995The present invention relates to a process for the regeneration of the resins in a fixed double-bed type ion exchange apparatus and the apparatus thereof. Said process of regeneration comprises of following steps: supplying a dilute regeneration solution to flow upwardly to backwash and pre-regenerate the resins; immersing statically the resins with said dilute regeneration solution; supplying a regeneration solution with higher concentration to flow upwardly to further regenerate the resins; supplying water to pass upwardly to replace said concentrated regeneration solution; and finally supplying water to pass downwardly to wash the upper part of upper resin layer, upper resin layer and both resin layers in turn. Said apparatus is characterized in that a lower discharging means for regeneration is disposed around the boundary surface of the two layers of resins. |
