Loop Flow Bubble-Generating Nozzle

摘要

There is provided a loop flow type bubble generation nozzle capable of improving the bubble generation efficiency compared to conventional nozzles without reducing the bubble generation efficiency even when liquid containing impurities is used. A loop flow type bubble generation nozzle 10 includes a tubular bottomed member 1 having a circular cross section and a tubular member 2 which is fitted into the other end side of the bottomed member 1. A substantially cylindrical space surrounded by the bottomed member 1 and the tubular member 2 serves as a loop flow type gas-liquid stirring and mixing chamber 6. The tubular member 2 has, on the center thereof, an inflow hole 7 which is capable of allowing liquid and gas to flow therein, and a first jet hole 8a and a second jet hole 8b which are capable of jetting liquid and gas. The inflow hole 7 is formed in a tapered shape whose diameter continuously expands from the first jet hole 8a toward the loop flow type gas-liquid stirring and mixing chamber 6. A plurality of cut-away parts 7a are formed on an end face of the inflow hole 7, the end face facing the loop flow type gas-liquid stirring and mixing chamber 6.

主权项

1. A loop flow type bubble generation nozzle comprising:
a loop flow type gas-liquid stirring and mixing chamber that stirs and mixes liquid and gas by a loop-like flow to form a fluid mixture; a liquid feed hole formed on one end of the loop flow type gas-liquid stirring and mixing chamber, the liquid feed hole feeding pressurized liquid to the loop flow type gas-liquid stirring and mixing chamber; at least one gas inflow hole into which gas flows; a gas feed chamber formed on the other end side of the loop flow type gas-liquid stirring and mixing chamber, the gas feed chamber feeding gas flowing in through the at least one gas inflow hole to the loop flow type gas-liquid stirring and mixing chamber toward one end side of the loop flow type gas-liquid stifling and mixing chamber through the entire circumference or part of the circumference while circulating the gas around a central axis of the liquid feed hole; a jet hole formed on the other end of the loop flow type gas-liquid stirring and mixing chamber in a manner to align a central axis of the jet hole with the central axis of the liquid feed hole, the jet hole having a diameter larger than the diameter of the liquid feed hole and jetting the fluid mixture from the loop flow type gas-liquid stirring and mixing chamber; and a tapered section whose diameter continuously expands from the jet hole toward the loop flow type gas-liquid stirring and mixing chamber, wherein at least one cut-away part is formed on an end of the tapered section, the end facing the loop flow type gas-liquid stirring and mixing chamber.