Patent ID: 6432302
Filing Date: 2002-08-13
Classification: B01F,C02F,Y02W

Abstract:
A distribution dish for a liquid circulation apparatus for circulating liquid from lower levels to the upper surface for mixing and exposure to the atmosphere, said circulation apparatus having a drive system to move the liquid through said distribution dish so as to evenly distribute the liquid, said distribution dish comprising:a circular dish placed just below the upper surface of said liquid said dish having outer walls with an upper edge and a lower edge, said outer walls tapering down and inward from said upper edge to said lower edge so as to define an upper opening and a lower opening, said lower opening having an area substantially less that of said upper opening, said dish being concave upwardly facing; a draft tube connected to said lower opening said draft tube walls extending perpendicularly downward from said lower opening; a impeller connected to 'said drive system, said impeller positioned in said dish above said draft tube said impeller having a diameter greater than that of said draft tube or said lower opening; and an upper horizontal lip defined by said circular dishes upper edge, said upper lip being substantially parallel to said upper surface of said water.