OZONE CATALYTIC REACTION TANK

PURPOSE:To reduce consumption of motive power and to promote aeration of water to be treated by introducing the water to be treated into a reaction tank by natural flow and equipping the packing material which is externally inserted on a cylinder. CONSTITUTION:Water 15 to be treated is stagnated in a reaction tank 10 while keeping the opening position of the takeout pipe 17 of treated water as the upper-limit water level. Ozonized air 19 is supplied toward an opening 12 of the upper end. Downward flow is generated in the inside of a cylinder 11. The stagnated water 15 to be treated is sucked into the cylinder 11 from the opening 12 of the upper end and becomes a liquid-gas two phases flow and descends through the inside of the cylinder 11. Both the water 15 to be treated and the ozonized air 19 flow out from an opening 13 of the lower end and thereafter become the upward flow and ascend. In the meantime, the water 15 to be treated in the reaction tank 10 is aerated by fine bubbles. In such a way, supply of the water to be treated is performed by natural flow. The need for a pump used for the water to be treated is eliminated and consumption of motive power is reduced. Furthermore since rise of fine bubbles is inhibited and the water to be treated becomes an agitated state, aeration of the water to be treated is promoted by the fine bubbles.