wire mesh pad demister is mostly used in distilling equipment
Wire Mesh Demister for distilling equipment:
Improved performance can be obtained in equipment for processing
asphalt, organic intermediate substances, fine chemicals, vegetable
oil, tall oil, fatty acid, glycerin, lubricant, benzene and
propane.
Wire Mesh Demister Brief Introduction:
There are many types of mesh pad demisters, including flat type,
oblique type, etc.. Usually the mesh pad thickness for flat type
demister is 100mm or 150mm. With simple structure, it suits for low
velocity, low mist rate gas flow. Re-entrainment easily happen when
the gas velocity is too high. While the oblique type (sometimes
also shown as wave shape demister) has flow guiding effect on the
captured liquid droplet, leaving less liquid droplets on the
downside of the mesh pad. So the oblique type demister has less
resistance to the passing gas flow, and is a little harder to cause
re-entrainment. It allows somehow higher velocity and mist content.
Mesh Density | Eq to: YORK | Description |
| 80 | 931 | For a given load of mist, the highest flow velocity is achieved of
all styles. Ideal where it is required to minimize the pressure
loss, possible clogging is concerned, the size of particle to be
collected is relatively large, and/or a very high efficiency is not
required. |
| 144 | 431 | Used for general purposes. An efficiency of 98 to 99% is achieved
at a velocity of 1 to 5 m/sec. |
| 192 | 421 | Used where an especially high efficiency is required. While a
pressure loss is slightly higher, it achieves an efficiency of 99
to 100% with particle sizes 3μ or more at a velocity of 1 to 6
m/sec., and is ideal where an efficiency of 90% or more is required
at a velocity of 1 m/sec. or less. |
| 216 | | Used for collecting fine particles of 1 to 3μ in size.
Especially for a low-density mist of 1.0 g or less, it is used in a
thickness of 200 to 300 mm. |
| 432 | 333 | Used for collecting fine particles. An efficiency higher than that
of 216 can be achieved. The most remarkable characteristic is that
it provides a high efficiency with a reduced thickness. |
Where are wire mesh DEMISTER units used?
Knockout drums and separators – save on capital costs by decreasing vessel size-recover costly
fatty acids from stream-reduce compressor maintenance by preventing
scale build-up.
Absorbers – reduce overhead losses of glycols in dehydrators to no more than
0.1 gal/MMSCF natural gas-cut losses of absorption oil and amines
in CO2 systems.
Scrubbers – reduce chemical discharges from Kraft mill smelt dissolver tank
to less than 0.11 kg/dry ton (0.25 lb/dry ton) of pulp-improve
scrubber efficiency by removing particulates carried in entrained
liquids.
Distillation columns – improve product purities and increase throughput capacities for
petrochemicals, organic intermediates, fine chemicals.
Evaporators – prevent carryover loss of valuable products, keep condensate TDS
<10 ppm for highest quality boiler feed water-clean up vacuum
ejector stream discharge-lower maintenance in vapor re-compression
systems.
High pressure steam systems – provide dry steam- cut TDS to <10 ppb in condensate-eliminate
build-up on turbine blades.
Refinery towers – increase throughput capacity-take deeper cuts for greater
product yields – prolong catalyst life in downstream cracking and
reforming units by reducing carbon and metals in side draws-use
lower grade crudes.
Wire Mesh Demister Installation:
