| 摘要 |
PURPOSE:To thoroughly separate three layers by adding a special operation in the stage of separating the layers of a mixed bed type desalting device where inert resins exist mixedly to the three layers by upward water flow. CONSTITUTION:This invention relates to the sepn. of the mixed ion exchange resin layers of the mixed bed type desalting device, in which backwashing water is first introduced into the device from a pipe 5 in the lower part of the mixed resin layers so as to fluidize the layers. The layers are settled after the water is filled up to the level between a chemical feed pipe 3 and a diffusion pipe 2. Compressed air is introduced from the pipe 3 into the device to oscillate the floating inert resins together with the backwashing water and to get rid of the foam sticking thereto. The inert resins are settled and in succession of, the backwashing water is introduced through the pipe 5 to thoroughly develop the mixed resin layers while the waste backwashing water is discharged from the pipe 2. The respective layers are then settled to be stratified and separated to an anion exchange resin layer 6, inert resin layer 7 and cation exchange resin layer 8 from above. The layer sepn. is thoroughly executed in the above-mentioned manner. |
