| 摘要 |
PROBLEM TO BE SOLVED: To discharge substances with color and odors even when they are dissolved from a treatment material by providing a washing process in which the flow rate of raw water supplied to a treatment container is large enough to wash the treatment container in a short time in a water treatment apparatus such as a softener. SOLUTION: In a water treatment apparatus having a water passage process for softening raw water in a raw water tank 5 by an ion exchange resin 4 and a regeneration process for regenerating the ion exchange resin 4 with salt water of a prescribed concentration, a water supply pump 9 is driven by the actuation of a flow switch 10 or a pressure switch 11 in a washing process. In this way, raw water in the raw water tank 5 is made to flow through a washing channel consisting of a raw water line 8, a by-pass line 15, soft water line 13, a resin cylinder 1, and a drain line 18. The flow rate of raw water supplied to the resin cylinder 1 is made greater than that in an extrusion process by the pump 9 so that residual water in the resin cylinder 1 can be discharged rapidly outside a system. |
