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HG/T21618-1998 Wire Mesh Demister / Mist Eliminator / Dimister Pads With Frame ( Grids and Support Parts )
HG/T21618-1998 wire mesh demister standard is based on the original Ministry of Chemical Industry standard HG5-1404-81, HG5-1405-81, HG5-1406-81, combined with the actual use experience of the wire mesh demister and the introduction device The advanced technology in the revision was made. If you design and use a wire mesh demister, you can use this standard as a reference. The technical parameters of the demister screen can be referred to the HT-2001 defogger screen standard, and the HG/T screen demister is a gas-liquid separation device. The gas passes through the wire mesh pad of the demister to remove entrained mist. The newly revised standard and the original standard have the following changes:
A. The original three standards are all combined into one standard, which is convenient for selection.
B. The diameter range and specifications of the demister are adjusted, and the nominal diameter specification is appropriately encrypted.
C. The wire mesh type used in the demister is added, and the basic parameters of the wire mesh are given. D. Increased the variety of materials for wire mesh and grille.
E. Added the process calculation content of the wire mesh demister, which is convenient for selection. 21618-1998 standard for wire mesh demister.
This standard specifies the structure, type, specifications, dimensions, technical requirements, marking, selection and use of wire mesh demister.
This standard applies to gas-liquid separation devices used in vertical cylindrical equipment in the chemical, petrochemical, pharmaceutical, light industry, environmental protection and other industries. It is used to separate mists with a droplet diameter greater than 3 to 5 μm.
The type of wire mesh demister is divided into top-loading type and bottom-loading type,
The top-loading wire mesh demister has a diameter range of DN300 to DN5200mm.
The bottom wire type demister has a diameter range of DN700 to DN4600mm.
The structure of the wire mesh demister
The wire mesh demister is composed of a demister pads (composed of several pieces of demister pads) and the support parts.
The demister pads is composed of a plurality of layers of tiled (circular) corrugated knitted wire mesh, grid and distance rod.
Demister pad structure diagram 1 - wire mesh; 2 - distance rod; 3 - grid.
The wire mesh demister mark interpretation:
Example 1: DN2000mm, H=150mm, filter type SP type, material 304L, top-loading wire mesh demister with grid and support material 316,
Marked as: HG/T21618 S2000-150 SP 304L/316
Example 2: DN4000mm, H=100mm, filter type DP type, material is 316L, grille, support material is 304 bottom-loading wire mesh demister,
Marked as: HG/T21618 X4000-100 DP 316L/304.