Treating liquids in tanks
OwnerEdward A. Seymourinventor
Life of this patent
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Abstract
Liquid is caused to circulate in a shallow tank which has an operational depth less than half the effective maximum distance across the tank. One wall 17 defines with another wall a corner 18 and a bubble curtain 19 is provided along the wall 17 adjacent the corner 18 which imparts to the liquid in the tank an upward vertical component of movement which is asymmetrical along the wall 17, causing greater vertical movement of liquid at said corner than at the other end of the wall. Liquid rising up the wall 17 moving away therefrom by reaction therewith will circulate with a horizontal component due to the asymmetrical arrangement of the bubble curtain. The invention can be applied to the separation of materials of different densities e.g. the separation of suspended solids or emulsified oils from waste water.
Claims9
A liquid treatment apparatus comprising a tank having one wall defining with another wall a corner, means to define an operational depth of liquid in the tank which is at most 50% of the effective maximum distance across the tank normal to said one wall, means to provide a bubble curtain in the tank along said one wall adjacent said corner which curtain in use imparts to the liquid an upward vertical component of movement which is asymmetrical along said one wall, causing greater vertical movement of liquid at said corner than at the other end of the wall, the arrangement of said bubble curtain providing mens being such that liquid rising up said one wall which moves away therefrom by reaction therewith will develop a horizontal component of circulation extending away from said one wall at said corner.
Dependencies are inferred from the claim text.