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In many process operations the removal of entrained material in vapour flows is essential. HESLY Knitwire Products provide a wide range of demister units suitable for any application. 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.
Demisters are made up from knitted materials with interlocking asymmetrical loops of metal or plastic with typical wire diameters being 0.1 – 0.3mm. By careful choice of wire diameter, Knitwire Products have produced knitted mesh demisters with extremely high free volumes (typically 98-99%) along with very high removal efficiencies and low pressure drop.
Along with wire diameter and mesh density, another important parameter in design and operation is the vapour velocity. This can be controlled by careful selection of the mesh area. Optimal area will depend on operating temperature, pressure and pressure drop. Under normal operating conditions, 99% + removal efficiency can be achieved with a pressure drop of less than 250 Pascals.
Our technical team can offer advice to assure optimum performance for your new or replacement demister.