Enviroquip Inc.

Harrington, James M

William N Walton

Henry J Hervol

A gas diffuser is provided for water and wastewater treatment. The gas diffuser unit includes a vertical open-bottomed injection pipe extending downwardly and having a plurality of vertical slot-shaped ports adjacent the open bottom. A gas bubble distribution body including a lip portion is located above the open bottom of the injection pipe, and a conical shaped deflector may be mounted on the gas injection pipe above the distribution body. Gas released from the vertical slot-shaped ports forms relatively large diameter bubbles which rise due to buoyancy. The large diameter gas bubbles are broken into smaller diameter gas bubbles and are evenly distributed upon the bottom surface of the gas bubble distribution body above the open bottom of the injection pipe. The lip portion on the gas distribution body promotes turbulence in the rising bubbles, and produces smaller diameter gas bubbles. The smaller diameter gas bubbles are further broken down into even smaller gas bubbles and more widely distributed by the deflector mounted above the bubble distribution body on the gas injection pipe. The generation of even smaller gas bubbles and wider distribution of the gas bubbles provides better mixing of the gas bubbles with liquids, and provides a larger surface interface between the gas bubbles and the liquid body resulting in higher gas transfer efficiency. A shaft tube surrounding the gas distribution body may be provided to further enhance gas transfer efficiency.

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Austin, TX, United States of America

Harrington, James M