LOOP FLOW TYPE BUBBLE GENERATION NOZZLE

摘要

[Problem] To provide a loop flow bubble-generating nozzle for which even the use of an impurity-containing liquid does not reduce bubble-generating efficiency and which is able to improve bubble-generating efficiency compared to the past. [Solution] A loop flow bubble-generating nozzle (10) comprises a bottomed tube-shaped member (1) with a circular cross-section and a tubular member (2) that is fitted into the other end of the bottomed member (1). The roughly cylindrical space surrounded by the bottomed member (1) and the tubular member (2) forms a gas-liquid loop flow stirring and mixing chamber (6). The center of the tubular member (2) has an inflow hole (7) into which liquid and gas can flow and a first spouting hole (8a) and a second spouting hole (8b) capable of spouting the liquid and the gas. The inflow hole (7) is formed in a tapered shape in which the diameter continuously expands from the first spouting hole (8a) in the direction of the gas-liquid loop flow stirring and mixing chamber (6). The end face of the inflow hole (7) on the gas-liquid loop flow stirring and mixing chamber (6)-side is provided with multiple notches (7a).