Standard Wire Mesh Demister Pad, 304 wire mesh demister pad

What is a Demister?

DEMISTERs are essential in many process operations for the removal of entrained material in vapour flow. Demister ASIA’s Demisters and mist eliminators provide a wide range of solutions suitable for any application.

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

How a Demister Works:

Mist eliminators/ Demisters are fabricated from knitted materials with interlocking asymmetrical loops of metal or plastic with typical diameters of 0.1 – 0.3mm. By careful choice of wire diameter, DemisterASIA has produced demisters with extremely high free volumes (typically 98 – 99%) along with very high removal efficiency and low pressure drop.

Along with wire diameter and mesh density, another important parameter in design and operation of a demisters is the vapour velocity. This can be controlled by careful selection of the eliminator area. Optimal area will depend on operating temperature, pressure and pressure drop. Under normal operating conditions more than 99%  removal efficiency can be achieved with a pressure drop of less than 250 Pascals.

Stock Materials commonly used:

Stainless Steel: Grades 302, 304, 316, 316L, 321, 309, 310S
Super Alloys: Inconel 601, Incoloy DS, Hastaloy, Carpenter 20
Fibrous Filament: ‘E’ Glass, ‘S’ Glass, ‘A’ Glass, Basalt, Ceramic, Silica, Kevlar
Others: Aluminium, Monel, Copper, and Brass, Mild Steel (plain and galvanised), Polypropylene, Polyethylene

Why Demisters from DemisterASIA?

Elimination of DA demisters are dependent on droplet sizes:

5 – 9 micron             99%
> 10 micron               99.5%

Most of the weight of entrained mist tends to be associated with the larger mist particles (larger than 5 – 10μm) thus providing greater than 99.99% weight removal.