Gas and liquid contact apparatus – Contact devices – Rotating gases
Reexamination Certificate
2005-05-10
2005-05-10
Bushey, Scott (Department: 1724)
Gas and liquid contact apparatus
Contact devices
Rotating gases
C261S096000, C261S109000
Reexamination Certificate
active
06889962
ABSTRACT:
A mass transfer column includes a feed device that is used to de-entrain liquid and more uniformly distribute vapor across a horizontal cross section of the column after a vapor or mixed phase stream has been directed into the column through a radially oriented feed nozzle. The feed device includes an annular passageway formed in the spacing between the column shell and an inner wall spaced inwardly from the shell. A deflector with oppositely directed deflecting surfaces is positioned at an inlet from the feed nozzle to the annular passageway and splits the vapor or mixed phase stream into two roughly equal streams that flow in opposite circumferential directions in the annular passageway. At least one pair of turning vanes is spaced on opposite sides of the deflecting surfaces in the annular passageway to create subpassages through which the vapor or mixed phase stream flows. The subpassages reduce the amount of vapor or mixed phase stream flow that impacts against the inner wall of the feed device at the inlet. The turning vanes unexpectedly reduce the pressure drop that occurs as the vapor or mixed phase stream is redirected from its radial entry direction to the circumferential direction in the annular passageway. By reducing the pressure drop, improvements in product yield and vapor distribution can be achieved.
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Ender Christoph
Laird Dana G.
Schnepper Carol A.
Bushey Scott
Koch-Glitsch, LP
Stinson Morrison & Hecker LLP
Wharton J. David
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