CONVENTIONAL VANES

Jonell CANADA INC

MAILBOX V

STANDARD V

MAILBOX H

STANDARD H

Jonell CANADA INC

1314D - 44th Avenue N.E. Calgary, Alberta. T2E 6L6 PH: 403 313-1559 FAX: 403 280-7926 Email: sales@jonellcanada.com

Jonell CANADA INC

Vane Nomenclature

General Jonell conventional vanes are custom designed to meet process requirements

and fit any vessel shape. This style of vane has been used for decades in a wide range of separation applications encountered in gas processing to remove condensates, water, and solvents: • Separators • Slug Catchers • Filter-Separators • Flash Tanks, etc.

Construction

Jonell vanes are assembled using the tie-rod and spacer approach. Spacers for 300 series stainless steel vanes are 316Lss. 304ss vanes must not be installed in the vessel prior to heat treatment. 316ss vanes are low carbon for this purpose Vanes are of one piece construction or segmented to fit through manways and facilitate han-dling. Maximum free spans without center supports of 84” for horizontal configuration and 60” for vertical configuration are recommended. Stocked Materials: Carbon Steel, 304 SS, 316 SS. Custom Materials : 2205SS, Hastelloy, Alloy 20, Titanium Service : Sweet, Sour, Low Temperature,

VANE PERFORMANCE

The mist eliminator is an integral component of the vessel and is not simply an outlet device. Spacing, particularly disengagement area, liquid retention capacity, likelihood of foaming or fouling and other considerations must be considered in vane mist eliminator design. Jonell Canada uses the Souders-Brown equation to determine active area as illustrated in Section 7 of Gas Processors Suppliers Association, and proprietary collection efficiency formulae.

In gas processing scrubbers, a typical performance requirement is for the reduction of liquids to 0.1 gal/MMSCF or less. This very roughly corresponds to the removal of 99% of droplets of diameter 10 µm and greater. In the graph above, a light condensate is removed from a gas stream operating at 300 psia. Note that the threshold droplet size to achieve 99% removal goes up quickly with increasing operating pressure. Wet differential pressure drop is based on loading, vessel configuration, physical properties, etc. Jonell suggests using rule-of-thumb estimates: pressure drop will vary between 1/3 to 1-1/2 inches w.c., negligible compared to operating pressure encountered in gas processing. Jonell recommends sizing vanes at their optimum, or maximum capacity. At lower than opti-mum velocities, droplets are more able to negotiate through the serpentine path. Above this value, carry-over occurs.

PERFORMANCE

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DROPLET SIZE

REMOVAL EFFICIENCY % .