| 摘要 |
PURPOSE:To maintain optimum ozone absorptivity by controlling the number of ozonizer groups with which the flow rate, etc. of an ozonizing gas are fixed and controlling the flow rate of the ozonizer groups for controlling electric power for discharge, etc. to control the feed rate of ozone. CONSTITUTION:This device has a pretreating installation 2 and consists of the No.1-No.3 ozonizer 3 groups with which the flow rate and concentration are fixed and which have, for example, the same ozone generating power and the No.4 ozonizer 3' (ozonizer group II) which has the capacity of twice the capacity of the No.1-No.3, controls the rotating speed of a blower 1 and controls the electric power or frequency for discharge so as to maintain the specified concn. of the ozone formed according to a change in the flow rate. The proportional control by the flow rate measured by a flow meter 7 for feed water 6 admitted into a reaction vessel 5 is executed via a control mechanism 4 for said groups. |
