Gas diffuser

Abstract

Abstract An air diffuser for use in a sewage treatment tank in combination with an air supply conduit. The air diffuser comprises a body member with an opening therein extending therethrough from an inlet side to an exit side. Valve means are located in the opening intermediate the inlet and exit sides and is movable between open and closed positions. The body member is provided with means for attaching the same to the air supply conduit in gas-conducting relationship therewith in such a position that the exit side of the body member may be located vertically below or above the inlet side. Introduction of pressurized air to the air supply conduit and to the inlet side of the body member causes the valve means to open with subsequent passage of air to the exit side of the body member and the exit side of the body member is preferably formed into a chamber of a substantially larger volume than the inlet side. A plurality of notches or slots or holes is provided in the peripheral edge on the exit side of the opening and this tends to let the air escape into the sewage in small bubbles. When the pressurized air is shut off, the gas trapped between the slots and the valve means tends to hold the valve means closed and this trapped volume of air also keeps liquid sewage from traveling back to the valve means and to the air supply conduit.

Inventors

• 👤 David S Maclaren

Bibliographic Details