Gas and liquid contact apparatus – Contact devices – Injector type
Patent
1995-11-09
1997-02-25
Miles, Tim R.
Gas and liquid contact apparatus
Contact devices
Injector type
B01F 304
Patent
active
056056532
ABSTRACT:
A submersible liquid circulation apparatus comprises an upright open-ended draft tube and a bubble generator. The bubble generator is coupled to the exterior side of the draft tube, so that it continuously generates bubbles which are introduced into the draft tube for propelling the liquid material up through the draft tube. This continuous and cyclic movement of bubbles inside the draft tube facilitates continuous circulation and mixing of the liquid. A gas supply means is coupled to the bubble generator for supplying the necessary gas to generate the bubbles. The elongated draft tube comprises an upper section and a lower section separated by a slight gap. Thus, liquid entering the inlet end of the lower section is propelled upward and across the gap separating the two sections and is ultimately expelled through the outlet end of the upper section. This gap provides an additional inlet point for liquid located at a point above the bottom of the digester, to flow directly into the draft tube.
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