Liquid Gas Separator Mist Eliminator Demister Pad For Tower Internal
Demister Pad Working Principle
Normally demister pad is installed in such a way that vapour flow is upward. When vapour and entrained liquid droplets pass through a demister pad, the vapour passes easily but liquid droplets, due to their greater inertia, cannot make the necessary sharp turns and are thrown into contact with the wire surfaces and briefly held there.
As more droplets enter the pad and collect on the wires, they grow in size, run down the wire to the bottom surface of the mesh seperator and fall from the unit. Over head vapour is now free of entrained liquid.
Description of Demister Pad
Demister Pads / Coalescer / Mesh Pad are porous blankets of wire or plastic knitted mesh, designed and constructed for efficient and economical removal of entrained liquid droplets from vapour streams. The pads can be fabricated in any desired size and shape.Demister pad / Coalescer / Mesh Pad prevent loss of valuable product and produces high quality condensate suitable for use a boiler’s feed water.
The applications are in the refinery vacuum towers, evaporators, refinery lube towers, steam drums,absorbers, scrubbers, seperator vessel and knock out drums.
The allowable velocity depends on liquid density, surface tension, droplet size and quantity of entrainment. The pressure drop is negligible and the efficiency is high depending on vapour and liquid loading.
Product Feature of Demister Pad
1.Neat and precise;
2.Reliable filtering precision;
3.Thermal & Shock Resistance;
4.High compressive strength;
5.Corrosion and rust resistance;
6.Wear-resistance;
7.Good moulding.
Product Specification of Demister Pad
(1) standard type
|
Wire Diameter
dw(mm)
|
Width Tolerance
(mm)
|
Density
ρ(kg/m3)
|
Surface Area
α (m2/m3)
|
Void Fraction
ε
|
| Flat Wire |
Round Wire |
±20 |
150 |
Flat Wire |
Round Wire |
0.981 |
| 0.1*0.4 |
0.23 |
475 |
320 |
(2) High Penetration
|
Wire Diameter
dw(mm)
|
Width Tolerance
(mm)
|
Density
ρ(kg/m3)
|
Surface Area
α(m2/m3)
|
Void Fraction
ε
|
| Flat Wire |
Round Wire |
±20 |
98 |
Flat Wire |
Round Wire |
0.9875 |
| 0.1*0.4 |
0.23 |
313 |
217 |
(3) High Efficiency
|
Wire Diameter
dw(mm)
|
Width Tolerance
(mm)
|
Density
ρ(kg/m3)
|
Surface Area
α(m2/m3)
|
Void Fraction
ε
|
| Flat Wire |
Round Wire |
±20 |
182 |
Flat Wire |
Round Wire |
0.977 |
| 0.1*0.28 |
0.19 |
626 |
484 |
Application of Demister Pad
The gas-liquid filter and support device used in the manufacture of the wire mesh demister are produced by our factory according to the standard of the Ministry of Chemical Industry HG/T21618-1998 wire mesh demister .The wire mesh demister produced by our factory can not only filter out the large liquid foam suspended in the airflow, but also filter out small and tiny liquid foam. It is widely used in chemical, petroleum, tower manufacturing, pressure vessel and other industries. In the gas-liquid separation device.
Product Show of Demister Pad
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