METHOD FOR REMOVING DISSOLVED OXYGEN IN WATER AND DEVICE FOR REMOVING THE SAME

摘要

PROBLEM TO BE SOLVED: To make it possible to efficiently remove the dissolved oxygen in water to be treated by dispersing fluid with a gas dispersing device disposed to communicate small chambers, thereby reducing the sizes of the bubbles of the inert gas forcibly fed into the water to be treated and increasing the gas-liquid boundary area. ;SOLUTION: The water to be treated from which the dissolved oxygen is to be removed is forcibly fed via a supplying pipe 4 for the water to be treated by a pump 3 of a removing device 1. The inert gas of a compressed cylinder 6 is forcibly fed via a flow rate regulating valve 8 into the supplying pipe 4 for the water to be treated. Further, the fluid mixture composed of the water to be treated and the inert gas is supplied to the gas dispersing device 2 and is subjected to gas replacement by the dissolution of the inert gas and the release of gaseous oxygen, by which the dissolved oxygen in the water is removed. On the other hand, the treated water is admitted from a discharge port 5a of a treated water discharge pipe 5 into the primary chamber 9a of a tank 9. The movement of the air bubbles of the treated water to a secondary chamber 9b side is prohibited by a partition 13 and the air bubbles are erased only by the primary chamber 9a. The treated water moving into the secondary chamber 9b is drained from a drain pipe 12 in the state of not mixing the air bubbles therewith.;COPYRIGHT: (C)1997,JPO