Air saturation cylinder

摘要

A device (20) for dissolving air in water at super atmospheric pressure. Air injectors (32) formed of sintered stainless steel pipe form very small bubbles typically having diameters of twenty to forty microns. Water is injected between the outer (44) and the inner pipes (46) adjacent to the head (48) and tangential to the outer pipe. The outer pipe is longer than the inner pipe and is capped by a second head (50). Water flows in a spiral path around the inner pipe towards the second head, enters the inner pipe and flows to an outlet (54) through the common head. The air supplied to the vessel is divided into two equal parts, one part is injected through six air injectors (32) along the outer pipe, and the other half of the air is injected along the axis of the inner pipe through a sintered porous pipe which extends through the second head.