PURPOSE: To sharply improve the bubble ratio in a bubble-water mixed fluid by arranging a fluid circulating means for circulating the bubble-water mixed fluid upstream and downstream of a gas-liquid mixing part.
CONSTITUTION: A fluid circulating means 7 for circulating a bubble-water mixed fluid in a fluid transfer pipe 3 is installed in the downstream and upstream places of a gas-liquid mixing part 4. Then, a fluid is accelerated based on the joining of fluid to promote the micronizing of bubbles. In the gas-liquid mixing part 4, a lot of narrow pores 3b are made in a sidewall 3a of a fluid transfer pipe 3 to jet pressurized gas fed from a pressurized gas feeding pipe 2a surrounding the pipe 3 from a gas chamber 5. Then, the bubble-water mixed fluid of a desired bubble ratio is surely taken out.
OI TADASHI
TAKAHASHI YOSHIAKI
WATANABE OSAMU
MITSUTAKE HIDEO
MARUYAMA SHOICHI
ISHIKAWAJIMA HARIMA HEAVY IND