Mixing nozzle and contaminated gas purification device using mixing nozzle

A mixing nozzle immersed in solution stored in a water storage pool, and mixing gas from outside and the solution in the water storage pool from a bottom side of the water storage pool toward an upward direction, the mixing nozzle comprising:

• a throat section which includes an internal cross-sectional area for accelerating mixed flow which is provided by mixing the gas and the solution;
• a diffuser section whose internal cross-sectional area expands in a flared shape toward a downstream side from the throat section;
• a gas nozzle section having a gas nozzle tip whose internal cross-sectional area reduces in a tapered shape toward the downstream side, arranged at an upstream side of the throat section, and supplied with the gas from the outside;
• a first liquid suction port for liquidly absorbing the solution in the water storage pool from a side of the gas nozzle section toward the gas nozzle tip;
• a liquid nozzle section extending to the downstream side of the gas nozzle section with intervening the first liquid suction port, and having a liquid nozzle tip whose internal cross-sectional area reduces in a tapered shape toward the downstream side;
• a second liquid suction port for liquidly absorbing the solution in the water storage pool from a side of the liquid nozzle section toward the liquid nozzle tip, arranged at the upstream side of the throat section and the downstream side of the liquid nozzle section;
• a baffle plate arranged at a downstream end of the diffuser section and provided such that the gas discharged from the gas nozzle tip is accelerated in the throat section together with the solution liquidly absorbed from the first liquid suction port and the second liquid suction port and that the mixed flow mixed in the diffuser section collides in front of the downstream end of the diffuser section, in which the baffle plate divides and reverses the mixed flow such that high-speed reversed flow of the mixed flow is formed and the gas and the solution are mixed by centrifugal force;
• and
• a jetting port in which the mixed flow divided and reversed by the baffle plate jets out in a direction not directly toward an upper direction of the water storage pool.