| 摘要 |
PROBLEM TO BE SOLVED: To supplement new solid chemicals to other chemical keeping section even in a state that some solid chemicals still remain in one chemical keeping section, use up all the solid chemicals, eliminate waste of chemicals, at the same time, when the solid chemicals are supplemented, the new solid chemicals can be only kept in the vacant chemical keeping section to facilitate maintenance work, and to prevent the disposal of the old solid chemicals from taking time. SOLUTION: A chemicals supplier 10 connected to a branch channel is equipped with a container 11 storing solid chemicals Y so as to make it possible to supplement, and a selector value 20 making washing water in the container including dissolved solid chemicals flow out to the branch channel. At least two chemical keeping sections 12 and 13 for storing and keeping the solid chemicals are provided in the container.
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