Imperforate bowl: centrifugal separators – Rotatable bowl – Including structure located within vertically-oriented bowl...
Patent
1996-07-09
1998-10-20
Cooley, Charles E.
Imperforate bowl: centrifugal separators
Rotatable bowl
Including structure located within vertically-oriented bowl...
494 61, 494 65, B04B 912, B04B 1100, B04B 1508
Patent
active
058239375
ABSTRACT:
A centrifugal separator for separating the solids component of a feed liquid comprises a bowl that is rotatable about a vertically disposed axis. The bowl has an interior wall, an open upper end, a closed lower end, and a generally cylindrical portion. A feed cone assembly is located at the bottom of the closed conical lower end. The feed cone assembly includes a conical outer wall and an integrally-formed, truncated cusp-shaped hub which extends upwardly towards the interior of the bowl. An annular chamber is located between the conical outer wall and the hub. A feed pipe extends from the upper end of the bowl to the lower end and includes a feed outlet which is sized and shaped to fit within the annular channel. Liquid feed is introduced into the annular channel through the feed pipe while the bowl rotates. Centrifugal force moves liquid in the annular channel outwardly along the smooth contours of the channel and onto the conical wall of the feed cone. The liquid gradually and gently moves up along the outwardly tapering conical wall, increasing its rotational velocity until it blends with the liquid located within the spinning bowl. In another embodiment, the bowl includes an open lower end and a closed upper end. An inverted feed cone is positioned at the upper end and includes a rounded cusp-shaped diverter whose surface gradually merges with the outer conical wall of the feed cone and defines an annular channel. A feed pipe extends from the lower open end and includes a feed applicator which is positioned coaxially with and adjacent to the cusp-shaped diverter. The feed applicator is sized and shaped to closely follow the contours of the cusp-shaped diverter so that as the bowl is rotated, liquid feed forced through the feed pipe is applied to the outer surface of the spinning cusp-shaped diverter and is gradually and gently introduced to the conical wall of the feed cone and into the generally cylindrical portion of the spinning bowl. In another embodiment, a vacuum within a predetermined range is applied within the bowl to reduce power consumption and foaming.
REFERENCES:
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patent: 3327401 (1967-06-01), Stamos et al.
patent: 3989185 (1976-11-01), Mercier
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