Anping Yuanqiao Petrochemical Equipment Co., Ltd |
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Stainless Steel Mist Eliminators Mesh Pad Demister 304/316/316l
1. Yuanqiao high Quality Filter Elements Knitted Wire Mesh for
Demister Pad
The diameter of the separated drops in the gas which comes out in
the ordinary chemical industry operation is about 0.1~5000μm. The
separation of drops which have the diameter of above 100μm can be
solved easily, for the sedimentation speed of such drops is
relatively high. The drops which have the diameter above 50μm can
be separated by gravitational settling method, the ones which have
the diameter above 5μm can be separated by inertial impaction and
centrifuge method; the smaller ones should be congregated to become
lager, or be separated by using fiber filter and static demister.
2. Features
Wire-mesh demister(or mist eliminator)is mainly used to separate
drops of the diameter between 3μm to 5μm, the operating principle
is showed in the fig at the right side. When the gas with liquid
drops rises at a certain speed, passing through the wire mesh on
the grid bar, the inertia of the rising drops make them collide
with the wire and then adhere to the surface of the wire. The drops
on the wire will diffuse and subside. It makes the drops form
bigger ones and then flow along the wire to the intertexture of the
wire. Because the wire can be humidified, and because of the
surface tension of liquid and the capillarity effect of the wire,
the drops will become bigger and bigger. They will be separated and
fall when their own weight exceed the resultant force of buoyancy
of the rising gas and surface tension of liquid. They will flow to
the device of the container in the backward position. As long as
the speed of the gas is properly controlled and with other proper
condition, the efficiency of foam remove will be as high as 97%
after the gas pass through wire-mesh
demister.The purpose of removing foam will be achieved completely.
3. Knitted Mesh Pad Demister Application Area,
The characteristic of wire-mesh demisterTOP.
- Structure simple, weight light.
- High factor of porosity, low head loss.
- Great contact surface area, high removing foam ratio.
- Convenience of installing, operating and repairing.
- Long service life.
4. Knitted Mesh Pad Demister Material Comparison,
Difference between duplex 2205 stainless steel plate and Austenitic
304 stainless steel plate
1) The yield strength of austenitic stainless steel is more than
twice as high as that of ordinary austenitic stainless steel
Enough plastic toughness. The wall thickness of the tank or
pressure vessel made of duplex stainless steel is 30-50% less than
that of austenite, which is helpful to reduce the cost.
2) Even duplex stainless steel with the lowest alloy content has a
higher ability of stress corrosion cracking resistance than
austenitic stainless steel, especially in chloride containing
environment. Stress corrosion is an outstanding problem difficult
to solve for normal austenitic stainless steel.
3) The corrosion resistance of 2205 duplex stainless steel, which
is widely used in many media, is better than that of 316L
austenitic stainless steel, while super duplex stainless steel has
very high corrosion resistance. In some media, such as acetic acid,
formic acid, etc., it can even replace high alloy austenitic
stainless steel and even corrosion resistant alloy.
4) Compared with austenitic stainless steel with the same alloy
content, it has better wear resistance and fatigue corrosion
resistance than austenitic stainless steel.
5) Compared with austenitic stainless steel, the coefficient of
linear expansion is lower, close to carbon steel, suitable for
connection with carbon steel, which has important engineering
significance, such as production of composite plates or linings.
6) No matter in the condition of dynamic or static load, it has
higher energy absorption capacity than austenitic stainless steel,
which has obvious advantages and practical application value for
structural members to deal with sudden accidents such as collision,
explosion, etc..
5. Knitted Mesh Pad Demister Typical Usages:
The demister is used to separate the liquid droplets entrained by
the gas in the tower to ensure the mass transfer efficiency, reduce
the loss of valuable materials and improve the operation of the
compressor after the tower, reduce the water content, and extend
the life of the compressor, generally at the top of the tower Set
up a demister. It can effectively remove 3--5um droplets. If a
demister is installed between the trays, it can not only ensure the
mass transfer efficiency of the trays, but also reduce the plate
spacing. Therefore, the wire mesh demister is mainly used for
gas-liquid separation. It can also be used for gas separation on
air filters.
Using: Chemical, petroleum, sulfate, medicine, light industry,
metallurgy, machine, building, construction, aviation, shipping and
environment protection
6. Knitted Mesh Pad Demister mesh density and its applications
Mesh density (stainless steel) | Application |
50 kg/m3 | Heavy fouling, e.g. evaporators |
80 kg/m3 | Moderate fouling, e.g. vessel boilers |
110 kg/m3 | Light fouling |
145 kg/m3 | Heavy duty, e.g. oil and gas separators |
170 kg/m3 | General purpose, not totally clean |
195 kg/m3 | Optimum efficiency & pressure drop |
240 kg/m3 | High density with high separation efficiency |
112 kg/m3 | General purpose, clean service |
145 kg/m3 | Find droplet removal in clean service |