PROBLEM TO BE SOLVED: To ensure the safe and stable starting of a gas dissolving device by restraining the no-load running of a pump in an early starting stage of the gas dissolving device.SOLUTION: This gas dissolving device 1 includes a dissolving tank 2 which mixes a fluid flowing way inside with a gas and produces the gas-dissolved fluid and a pump 3 which supplies the fluid into the dissolving tank 2. During the early starting stage of the device 1, the pump 3 is operated at the rotation number not idling during a specified preset time, and thereafter, the number of rotation of the pump 3 is increased and the operation is shifted to a steady state.COPYRIGHT: (C)2011,JPO&INPIT【課題】気体溶解装置の起動初期におけるポンプの空運転を抑制し、安全かつ安定に起動すること。【解決手段】内部に流入した流体を気体と混合し、気体が溶解した液体を生成する溶解タンク2と、溶解タンクに流体を供給するポンプ3とを備えた気体溶解装置1の起動初期は、あらかじめ定めた設定時間の間、空運転しない回転数でポンプを運転し、その後、ポンプの回転数を上昇させ、定常運転に移行する。【選択図】図1
