OZONE TREATING DEVICE AND ITS OPERATION CONTROLLING METHOD

摘要

PROBLEM TO BE SOLVED: To provide an ozone treating device and an operation controlling method that sufficient contact time is taken even if the flow rate of the water to be treated is varied and ozone absorptance is high. SOLUTION: The operation control is executed by providing plural diffusers 41 and 42 at the upper part and the lower part of a dissolving tank 61 flowing the water to be treated downward and selecting an air diffuser from the dissolving tank section flow velocity of the water to be treated related to the water quantity of the water to be treated or the dissolved ozone concn. at the outlet of the dissolving tank. The device is actuated as a lowering dissolving type when the flow velocity is rapid and actuated as a counterflow contact type when the flow velocity is slow.