Rectangle Ss316 Wire Mesh Demister For Vessel Boiler System
Certification:ISO 9001-2015
Minimum Order Quantity:1 pc
Delivery Time:5-8 working days
Payment Terms:T/T, L/C
Place of Origin:China
Price:negotiation
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Wire mesh demister in vessel boiler system custom shape and size
Wire Mesh Demister Mist Eliminators Standard Specification
1.General introduction of wire mesh demister
Wire mesh demister is used to separate mixture of vapor liquid in
some industrial applications. Sometimes a vapor-liquid separator
may also referred to as a flash drum, knock-out drum, compressor
suction drum or compressor inlet drum. It is usually called mist
eliminator when used to remove suspended water droplet from air
stream.
Normally, in the vertical vessels, the liquid drops to the bottom,
where they are withdrawn, as the force of gravity. But in low
gravity environments like a space station, the gravity is not
usable effectively. At this time, centrifugal force needs to be
utilised in a spinning centrifugal separator to drive liquid
droplets to the outer edge of the device while gas migrates to the
centre.
In either way of separation, the gas outlet can be surrounded by a
spinning mesh screen or grating. If any droplets occasionally reach
the outlet, they will strike the grating, be accelerated and thrown
away from the outlet.
The vapor goes through the mist eliminator at a designed velocity
which minimizes the re-entrainment of any liquid droplets.
The feed to a vapor-liquid separator may also be a kind of liquid
which is being partially or totally flashed into a vapor when it
enters the device.
Only when there is air space inside the chamber, the vapor-liquid
separator is effective. It can fail either when the mixed stream
inlet is overwhelmed or the draining of collected liquid is slower
than its growing. Considering this, the separator may be combined
with some liquid level sensing accessories, such as a sight glass
or float sensor. By doing this, both the supply and drain flow can
be regulated to prevent the separator from being overloaded.
2. 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 |
3.Material of construction and its application:
Materials | Main Application Area |
SS304 | Water solutions, Nitric acid reduced crude petroleum fraction etc. |
SS316L | Fatty acid reduced crude containing naphthenic acids and corrosive chemicals |
Synthetic fiber | For corrosive service at moderate temperature |
PP(Polypropylene) | For corrosive service at temperature up to 70℃ |
PTFE | For corrosive service at temperature of (-190℃, 250℃) |
Monel | Caustic soda, dilute acid |
Nickel | Caustic Soda, food products |
Copper | Freon, alcohol |
Aluminium | Nitric Acid |
4. How does a demister pad work?
(1)A vapor stream carrying entrained liquid droplets passes through a demister pad. The vapor moves freely through the knitted mesh.
(2)The inertia of the droplets causes them to contact the wire surfaces and coalesce.
(3)The large, coalesced droplets formed in the mesh ultimately drain and drop to the vessel bottom.
5.Advantages of PP Demister Pad
1. Various types and diameters.
2. Simple to install and uninstall.
3. Acid and alkali resistance.
4. Corrosion resistance
5. High filtering
6. Light weight
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Rectangle Ss316 Wire Mesh Demister For Vessel Boiler System
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