Demister Pad By Indian Engi-fab Corporation

Vapour flowing at high velocity carries liquid particles with it. This phenomenon is called a entrainmenta . A demister pad is an entrainment eliminator. In simple words, a demister pad is a a liquid-vapour separatora . A properly installed demister can achieve up to 99.9% separation efficiency, with a nominal pressure drop.

Demister Pads can reduce the residence time required to separate a given liquid droplet size thereby reducing the volume and associated cost of separator equipment. Demisters are often used where vapour quality is important in regard to entrained liquids; particularly where separator equipment costs are high (e.g., high pressure systems) or where space or weight savings are advantageous.

MECHANISM:
The principle of demister operation is based on having a large number of obstacles intercepting entrained droplets in a vapour flow. This large number of obstacles must provide minimum drop in pressure over the removal system.

The demister is employed where the liquid droplet size is below 10 microns. The pad is made up of knitted mesh of metallic or synthetic material. The vapour is made to pass through this mesh, causing the vapour to flow freely but the liquid droplets being entangled due to inertia.