Mist Eliminator, Vane Mist Eliminator, Baffle Mist Eliminator,
desulfurization tower Plastic Mist Eliminator
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.
Wire Mesh Demister
DEMISTER Materials:
It can be made of various materials, depending on its use, and its
major materials are as per the below:
1. SUS304, 304L, SUS316, 316L, MONEL
2. P.P (POLY PROPYLENE), P.E (POLY ETHYLENE), TEFLON
3.GLASS FIBER
Demister Separator Advantages:
Absolute separation of liquid particles greater than 10; for the
operation under extreme temperature and pressure; minimal pressure
loss
Uses:
For the filtration of natural gas
Demister of wire mesh pad is also known as mist eliminators or sprays. This
is a kind of high efficiency separation devices, used throughout
all kinds of process industries, to remove liquid droplets from gas
or vapor streams.
Wire mesh demister pads are used in chemical, petroleum, sulfate,
medicine, light industry, metallurgy, machine, building,
construction, aviation, shipping and environment protection.
Demister pad is mainly used to eliminate streams with diameter of
more than 3μm to 5μm.
Features of Wire Mesh Demister:
1. Simple structure with light weight.
2. Less pressure drop and big surface.
3. High demisting efficiency.
4. It is convenient for installation, operation and maintenance.
5. Long service life.
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.
Vane Mist Eliminator
Also known as chevron or plate type, vane mist eliminators consist of closely spaced corrugated plates that force mist-laden
gas to follow serpentine paths. These devices are generally not
efficient for mist droplets smaller than about 20 microns, but they
are sturdier than mesh pads and impose less pressure drop. Vane
arrays can be mounted horizontally or vertically. They are
preferred in applications involving high vapor velocities, low
available pressure drop, viscous or foaming liquids, lodging or
caking of solids, slugs of liquid, or violent upsets. Like mesh
pads, vane units are usually round or rectangular. They are
sometimes used in combination with mesh pads for optimum
performance in special situations. HESLY’s
standard vanes (front cover) are available in metal or plastics and
have various blade spacings and profiles. For special requirements.
Specification List of Filter Mesh |
Model | Specification | Wire Diameter mm | Materials | Area/Weight m2/kg | Technical Notes |
Standard | 40-100 Model 60-150 Model 140-40 Model 40-100 Model 40-100 Model 40-100 Model 40-100 Model | 0.1x0.4 0.1x0.4 0.1x0.4 0.27 0.1x0.4 0.25 0.2 | stainless steel wire stainless steel wire stainless steel wire gal. iron wire copper wire polyamide fiber PVC fiber | 1/0.5 " " 1/0.7
| 1, For 40-100 model: 40 holes in 100% width 2, Metal filter mesh can be processed into weaves type |
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.
Wire-mesh demister
Mesh demister (or named mesh mist eliminator) is used to gas
entrainment fog (droplet) remove, recycle expensive droplet
(precious materials), or purification of gas to reduce gas
impurities. Mesh mist eliminator is 0.15mm~0.25mm
corrosion-resitant metal wire or PP, PTFE and other engineering
plastics using a special wire woven wire mesh jingwei way, and then
pressed into a mesh-type wave (Wtype) formed after the cross-stack
shop.
Knitted Wire Mist Eliminator
In many process operations the removal of entrained material in
vapour flows is essential. Knitwire Products provide a wide range
of mist eliminator units suitable for any application. The
principle of mist eliminator 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.
Mist eliminators 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 mist
eliminators 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.