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Distillation Equipment Company Ltd

Mist Eliminators

Email: sales@traysRus.com

Tel: +44 (0)1785 602810   Fax: +44 (0)1785 602811

VANE Mist Eliminators

Vane Demister Type 3-2-NH
1600-2400mm Ø IPA Absorber Column
MOC Nickel 200
Vane Demister Type 3-2-NH

Vane (chevron) mist eliminators are widely used for the separation of liquid droplets from a gas stream. They consist of zig-zag chevron blades spaced usually on a 1", 1½" or 2" pitch.

The blade profile can be smooth (for non fouling services) or with hooks (for greater removal efficiency and capacity).

4 Pass Blades with Hooks, MOC 316L
4 Pass Blades with Hooks, MOC 316L

The blades are normally 2 pass, 3 pass or 4 pass. The number of passes corresponding to the number of times the gas flow changes direction. As the gas passes through the demister and changes direction the liquid droplets due to their momentum are unable to change direction as quickly and thus impact on the chevron blades where they coalesce and form larger droplet which then drain away.

4 Pass Blades with Hooks, MOC Polypropylene
4 Pass Blades with Hooks
4 Pass Blades with Hooks

Compared to mesh demisters DtEC vane type demisters offer the following advantages:

  • Higher capacity
    • Blades with a smooth profile will give 30% more capacity than a mesh demister
    • Blades with hooks will give 100% more capacity than a mesh demister
  • Higher liquid loading
  • Less risk of fouling
  • Lower pressure drop
  • Longer lasting in service
  • Suitable for foaming systems
  • Suitable for high liquid viscosity systems
  • Stronger construction
Vane Demister Type 4-1-WH
Column 2700mm, MOC 316L
Vane Demister Type 4-1-WH

With smooth profile blades typical removal efficiency is 100% removal of droplets 17µ and greater in diameter. Using blades with hooks the normal removal efficiency is 100% of droplets 10µ and greater in diameter.

As with the mesh demisters the vane demisters are supplied in a wide range of materials both in metal and plastic.

Flow configuration is either for vertical or horizontal gas flow through the chevron demister . In some application an inclined arrangement is used to facilitate the drainage of liquid. For horizontal gas flow the capacity is 30% greater than in for vertical flow.

Vane Pack Type 4-1-WH
Face Area 1800mm x 2000mm
MOC 304L
Vane Pack Type 4-1-WH

Construction normally is in segments for installation through column man-holes. In such cases the demister is supported on a full support ring welded to the column shell.

Alternatively, the vane demister can be supplied complete enclosed in a frame as a "Vane Pack" which can be flanged for direct attachment to a baffle plate within the vessel.

 

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