Liquid purification or separation – Flow – fluid pressure or material level – responsive
Patent
1993-04-29
1995-09-26
Drodge, Joseph W.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
210218, 210539, 210DIG9, 220218, 220220, B01D 2130
Patent
active
054531799
ABSTRACT:
A clarifier is disclosed with a cover or roof configured and disposed to minimize headspace between a top level of liquid in a clarifier vessel and a bottom of the roof. In one aspect the roof or cover includes one or more removable panels which permit access to a clarifier vessel's interior; the panels removably secured to a purlin system which is connected to a truss support secured to the vessel. In one aspect one or more circumferential purge air inlets are provided through which flow purge air. Purge air and gaseous material emitted from a mixture in the clarifier flow to a vent or vents through which they exit the clarifier. In one aspect the air inlet or inlets are disposed to provide uniform flow from the inlets to the vents. In one aspect one or more roof panels is connected with a known force and has a known rupture strength so that before explosive damage to other parts of the clarifier the panel is explosively disconnected and ruptured to relieve pressure in the clarifier. Also disclosed is a cover or roof for a clarifier vessel.
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"Texas Operations Wastewater Treatment Plant Dow U.S.A." Mar. 1992.
Drodge Joseph W.
The Dow Chemical Company
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