Method, device, and system for controlling dissolved amount of gas

摘要

A device for controlling dissolved amount of gas, comprising a pressure reducing part (1A) capable of bringing the inside of a tank (5) into a reduced pressure space by connecting a hole provided at the upper part of the closed tank (5) to a vacuum pump (1a) through a pipe (1b), an injection supply part (1B) injecting pressurized treated fluid (W) from the inside upper part of the tank (5) with a nozzle (3) capable of covering the large part of the reduced pressure space, a liquid foam generating part (1C) receiving the injected treated fluid (W) by a container (4) at the opening center part thereof and generating a large amount of air bubbles at the bottom part thereof and changing the air bubbles into liquid bubbles, a recovery pump part (1D) allowing the liquid bubbles overflowing from the upper end of the container (4) to fall to a lower part, temporarily storing the liquid bubbles as deaerated treated fluid, and recovering the treated fluid, and a tank water level sensor part (1E) transmitting information for maintaining the water level of the treated fluid (2W) stored in the tank (5) to a pump (7) and a valve (5b).