| 摘要 |
In the present invention, a gas-liquid mixing tank, intermediate tank, and gas-liquid separation tank are formed divided by a first partition wall and a second partition wall inside a dissolving tank. The gas-liquid mixing tank, intermediate tank, and gas-liquid separation tank are disposed in that order from the upstream side to the downstream side with regard to the flow of a liquid in which a gas is dissolved. The dissolving tank is divided in two, and an upper component is formed on the upper side and a lower component on the lower side. In the upper component, a first partition wall is formed integrally with the upper component, and the first partition wall extends from the upper surface of the upper component downward. In the lower component, a second partition wall is formed integrally with the lower component, and the second partition wall extends upward from the bottom surface of the lower component. A gas circulation pipe is sandwiched between the upper surface of the upper component and the upper part of the second partition wall, and an area between the upper surface of the upper component and the upper part of the second partition wall is made airtight by sandwiching this gas circulation pipe therein. |
