| 摘要 |
PROBLEM TO BE SOLVED: To stably and continuously generate superfine bubbles of about 0.5 to 3μm by a simple device constitution. SOLUTION: Air is sucked from the outside utilizing negative pressure at the time when a centrifugal pump is started, so as to make a gas-liquid mixed body 23 of air and bathtub water. The gas-liquid mixed body 23 is fed to a static type mixer 13, and is further stirred and mixed by the static type mixer 13, so as to make a superfined gas-liquid mixed body 27. The static type mixer 13 is composed of a screw part 25 on the upstream side and a cutter part 26 on the downstream side. The screw part 25 is composed of: a cylindrical body 28; a partition bar 29; and a helical blade 30 arranged inside an annular passage between the body 28 and the partition bar 29. The cutter part 26 is composed of: a cylindrical body 31 and a plurality of projections 32 arranged at the inner circumferential face of the body. Since the gas-liquid mixed body 23 is made into a rotating flow at the time when it passes through the screw part 25, and collides against the projections 32 in the cutter part 26, superfine bubbles of about 0.5 to 3μm can be continuously generated. COPYRIGHT: (C)2006,JPO&NCIPI
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