Energy Industry Tower Internal Wire Mesh Demister
1. experience in York 431 demister,
we have more than 12 years experiences in mesh pad demister / mist
eliminator, as well as valuable knowledge in related technical
calculation, like the operation pressure drop, eliminating
efficiency, etc.
In daily work, when we make a price offer for a demister, usually
we need to estimate the package info, too, like the weight and
package plan. So that either the salesman or the customer can
easily inquiry the shipping cost. For a faster response to the
customers’ request, I have made this theoretical data sheet as
below. Among them, the data for grids and space rods are introduced
from “HG/T 21618-1998 Mesh Demister”. And the data of mesh pad is
calculated based on York 431 demister’s specifications.
The table is for round shape wire mesh demister only. Generally we
think square or rectangular shape mist eliminator’s data are easier
to be calculated. While if other complicated demisters’ data are
needed. Maybe a CAD software can help us a lot.
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. Where are 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.
