Introduction to several commonly used standard wire mesh demister types and standards

Several commonly used standard wire mesh demister types and standard introductions
⒈ HG5-1404 (1405, 1406) -81
standard is divided into ascending pipe type (1404), reduced diameter type (1405) and full diameter type (1406). The diameter of the demister ranges from 300mm to 6400mm, with two heights of 100mm and 150mm. When ordering, only the drawing number and the material used need to be provided. Marking example: HG5-1406-81-11, 304/Q235A

That means the wire mesh is made of 304 stainless steel, the grille is made of Q235A full-diameter top-mounted, the wire mesh demister is 1600mm in diameter and 100mm in height.

⒉ The new standard HG/T21618-1998
combines the three installation forms of riser type, reduced diameter type and full diameter type; proposes four mesh types of SP, HP, DP and HR and expands the types of materials used; and increases the spacing density in setting specifications and sizes.

Marking example: HG/T21618 Wire mesh demister S1600-100 SP 304/304

That means the grille and wire mesh are made of 304 stainless steel, top mounted, with a diameter of 1600mm and a height of 100mm, and the mesh type is SP's wire mesh demister.

3. HG/T21586-98 (Drawer-type wire mesh demister)
This standard is mainly applicable to occasions where demister components need to be cleaned or replaced, such as drying towers and absorption towers in sulfuric acid plants. The nominal diameter range is DN300mm~DN5000mm, a total of 56 types. When ordering, only the drawing number and the selected material are required (316L, NS-80 and RS-2 are the wire mesh materials selected for sulfuric acid plants).

Marking example: HG/T21586.11-98 WME-1600-100 NS-80/Q235A

That means the wire mesh is NS-80, the grille is Q235A, the diameter is 1600mm, and the height is 100mm, which is a drawer-type wire mesh demister.

4. Corrugated (flow-guiding) wire mesh demister
Corrugated wire mesh demister has the following characteristics:
it realizes gas-to-gas and liquid-to-liquid paths, basically eliminates secondary entrainment, and significantly improves the defoaming effect.
Due to the tilt of the mesh block, the actual defoaming area is increased by 15%, which facilitates the adjustment of airflow, speed, resistance and defoaming effect during design.
Using one layer of corrugated wire mesh demister can achieve the defoaming effect of two layers of wire mesh demisters, saving installation space and reducing the cost of a single tower demister.