Patent ID: 6730222
Filing Date: 2004-05-04
Classification: B01D

Abstract:
A hydrodynamic separator for the treatment of a liquid flow containing floatable material to separate the floatable material from the liquid containing it, said separator comprising a separating vessel having:a cylindrical outer wall; an inlet means for introducing liquid into the vessel in a manner to promote a low energy rotational flow of liquid in the vessel; a base at one end of the outer wall; an upper wall disposed opposite the base, said upper wall including an axial outlet opening for receiving a flow containing floatable material separated from the liquid flow to the vessel; a flow modifying member provided within the vessel to define with the upper wall an annular opening which is spaced from the outer wall; an annular dip plate spaced from the outer wall of the vessel, said dip plate comprising an upper edge spaced from the upper wall to define a gap for the flow of liquid containing floatable matter; and an outlet means, separate from the axial outlet opening in the upper wall, comprising a conduit for removing a primary liquid flow from the vessel, which conduit communicates with the interior of the vessel at a substantially axial location between the base and the upper wall.