Product Specification

York 431/931.Round /Square/Polyhonal  Knitted Wire Mesh Demister Pad/Mist Eliminator  With/No Grid  in distillation tower

1.What is Wire Mesh Demister Pad

Introduction

Wire mesh demister also called mist eliminator, is essential in many process operations for the removal of entrained material in vapor flows. Demister pads provide a wide range of solutions suitable for any application.

Material

• Stainless Stee: 201, 202, 205, 304,304L, 316, 316L, 321
• Duplex/Hastelloy C-276
• Aluminum: Pure Aluminum , Aluminum Alloy
• Nickel: Pure Nickel, Nickel Alloy2080, Monel
• PP: Polypropylene
• PE: Polyethylene
• PTFE/TELFON/F4
• F46

Parts

Wire mesh demister pads are made up knitted gauze pad and support grid of two parts.

2. What does a demister pad look like

Demister pads has a variety of shapes and sizes and can be installed horizontally or vertically. A typical horizontal demister pads made from steel knitted wire mesh, several feet in diameter and standard thickness is 4" and 6". Fine diameter wires which are typically ~0.0090 inches in diameter are interlocked by weaving machines to form a mesh pad with a high free volume (97% to 99+% void fraction) . A "tight" mesh (a lower void fraction and more dense) is more effective, i.e., it captures smaller diameter liquid

droplets vs. an "open" mesh, less dense mesh with a greater void fraction.

3.Demister pad fuction

• In the separation process, the droplets flow through the mesh pads and collide with the surface of the wire due to their inertia.
• The collected droplets coalescence at the cross points in the mesh pad and fall back as larger droplets into the vessel.
• The separation efficiency improves with increasing flow velocity. The maximum flow velocity must not be exceeded, however since flooding will cause re-entrainment to occur.
• The maximum droplet diameter for 99.9% fraction separation efficiency is within a range of 5 μm to 12 μm for standard mesh types.
• The wire mesh droplet demisters are made of fine wires with different mesh widths whereby the wire diameter generally ranges between 0.2 mm and 0.5 mm.
• The specific surfaces, depending on the type, are between around 150 m2/m3 to around 1100 m2/m3.
• Specially designed supports and cover grids are generally supplied to support the mesh pads, which are arranged so that the free inflow area is approximately 90%.
• When installing the wire mesh, the mesh pad must fit tightly to the wall of the column to prevent any gas leaking through.
• The pad of the wire mesh droplet separators (demisters) is between 100 and 150 mm thick in most applications.
• If the gas- or steam flow contains very fine droplets, e.g. as created during condensation, considerably deeper pads or multiple layers are required

Pollution Control

5. Drawer Demister Pad Brief Introduction

The drawer style HG/T21586 demister pad is mainly composed of rectangular bar that made of wire mesh and wire mesh flat plate instead of the original circular network block.

when using in the outside of the tower body only needs to be set 1 to N demolition mouth, the stripe screen block can be directly insert along the rail insert (maintenance).

Its selection of the nominal diameter range has of DN300mm ~ DN6000mm.

6.Technical parameter

7.Production process

8. INSTALLATION

9.Our unique features:

1) our have our owned wire drawing line to ensure the high-qualitified weaving

2) lines of machine can satisfy different customers with large quantity

3)good reputation of professional manufacturer, we are the largest factory for knitted wire mesh in ANPING-HOMETOWN OF WIRE MESH ALL OVER THE WORLD

4)EXPERIENCED staff can control weaving inspection easily

5) best service after sales, to solve prioblem for you