Vane mist eliminators are high capacity inertial separators constructed as banks of parallel, chevron profiles which cause the gas to change direction several times from inlet to outlet. Momentum forces entrained liquid droplets to impinge on the vane surfaces where they form a liquid film and drain..The range is divided into a number of categories depending on direction of gas flow and the complexity of the vane profile.

Gas Flow Configuration

When installing, the vane plate type mist eliminator flow configuration is either for vertical or horizontal gas flow through the
chevron mist eliminator. No matter what directions, it can remains high separating efficiency. In some specific applications,
an inclined arrangement can facilitate the drainage of liquid or particles. Normally, the capacity of horizontal gas flow is 30%
greater than in for vertical flow.
 

Mist eliminator for horizontal gas flow		Mist eliminator for vertical gas flow

 

Main types of vane plate type mist eliminator 

 The vane plate type mist eliminator can be made into one to four channel types in wavy line or modified zig-zag line structure. The two-channel and three-channel vane plate mist eliminator is the most widely used and popular types.

● Wavy line type.

This type of vane plate type mist eliminator is commonly made into two-channel line. The structure can be with or without hook structure.

■ Mist eliminator without hook type.

It is the most widely used type. It has better self-cleaning performance than the mist eliminator with hooks. It is widely used in the wet desulphurization applications.

■ Mist eliminator with hooks.

This type mist eliminator owns highest separating and filtering efficiency. Benefit from the hook structure, it can improves filtering and separating efficiency. But it is difficult to clean up when there are particle retention. So it is suitable for the environments where has low scaling possibility but high demisting requirements.

● Modified zig-zag line.

This type of chevron mist eliminator is commonly designed with smooth and without hook structure. The channel can be made into two channels and three channels.

■ Two-channel type.

This type has similar performance than the wavy line type two-channel type and it is gradually replaced by that.

 

■ Three-channel type.

The pressure drop of this type mist eliminator is lower than 200 Pa, but it is a bit higher than other mist eliminator types. The demisting performance is higher than the two-channel types because of more complex and chevron structure. But it is also difficult to clean up, so it is suitable for the low scaling possibility Environments.

Application		Working Principle
●Refineries ●Petrochemicals ●Coal-gas absorption ●Chemicals ●Pharmaceuticals ●Environmental protection ●Phosphoric and sulfuric acid plants ●Pulp mill, sugar refinery, and chemical plant evaporators ●LNG plants		Vane plate mist eliminator has similar but different working principle with knitted mesh demister pads. When the gases with particles or droplet mists rises and passing through the cane channels, the gas will change rising direction. The mist droplets momentum forces it to impact on the blades and coalesces to larger droplets and eventually drains off the blades when the gravity is larger than the gas lifting force and surface tension of liquid. The multi-channel structure improves separating and filtering efficiency during many times filtering and blocking.