Intra-Meshâ„¢

Intra-Meshâ„¢ mist eliminator comprises a pad of knitted wire mesh sandwiched between two rigid grids to provide support. Liquid mists collect on the wires as the bulk vapor travels through the pad. The collected liquid droplets coalesce in to a continuous film on the wires and drain from the mesh under gravity. Typical removal efficiency for common mesh type mist eliminators is 99% of 10 micron droplets. Efficiency of droplet removal might be affected by some parameters; such as quantity of wire in the unit of volume which is related to mesh density that provides number of restrictions against upward gas and liquid droplets flow.

Denser wire mesh causes greater removal efficiency and of course higher pressure drop . Higher gas velocity increases inertia of droplets which increases possibility of collisions. Of course very high gas velocity causes re-entrainment and flooding in wire mesh, thus gas velocity shouldn’t be increased (drum diameter decreases) as the critical velocity (usually a 20% margin is reasonable).

Thickness of wire mesh has the same effect as mesh pad density on efficiency. Liquid and gas transfer properties also affect removal efficiency and their influences are experimentally evaluated and exerted in design models.

Design parameters are as follow :

• Mesh density
• Uniformity of gas velocity profile
• Gas velocity (drum diameter)
• Wire mesh thickness
• Gas liquid transfer properties
• Internal device layout in drum

Uniformity of gas velocity profile across mesh pad entrance is also a very important parameter in wire mesh performance. INTRA design software considers all the design parameters to provide a quick and reliable design to our customers.