Demister In Distillation Column
SPT mesh pad type demister removes droplets by impingement on the wire surface. The liquid collected on the filaments is then able to drain from the pad under gravity. They have a limited range of useful operation in which they provide almost complete removal of droplets down to about 3–5 microns. Turndown range of the vapour rate is around 3:1. At excessively high vapour velocities, the liquid droplets that impinge on the wire surface are sheared off by the vapour and re-entrained before they are able to drain. At very low vapour velocities, all but the larger droplets are able to follow the vapour path through the mesh and thus avoid impingement; however, the inherent design of the separator vessel means that in most applications an effective turndown performance of 10:1 or better can be achieved.
Standard Mesh Pad Type
At Saiptech, mist eliminators can be manufactured in virtually any size and are available in a wide range of materials, with over 14 distinct styles designed and fabricated to meet specific application needs.
| Type |
Material |
Wire Dia (mm) |
Pad Density (kg/m?) |
Surface Area (m?/m?) |
Free Volume (%) |
Application |
| SMD1 |
Metal |
0.28 |
80 |
145 |
99 |
Moderate fouling, minimum pressure drop |
| SMD2 |
Metal |
0.28 |
110 |
200 |
98.60 |
Light fouling, fine entrainment |
| SMD3 |
Metal |
0.28 |
144 |
258 |
98.20 |
Standard general-purpose media |
| SMD4 |
Metal |
0.15 |
144 |
482 |
98.20 |
High efficiency for fine entrainment |
| SMD5 |
Metal |
0.28 |
168 |
310 |
97.90 |
General purpose |
| SMD6 |
Metal |
0.28 |
192 |
350 |
97.60 |
Optimum efficiency & pressure drop |
| SMD7 |
Metal |
0.15 |
192 |
643 |
97.50 |
Very high efficiency in clean service |
| SMDP1 |
Polypropylene |
0.3 |
75 |
820 |
93 |
Acid mists |
| SMDP2 |
Polypropylene |
0.3 |
50 |
750 |
95.30 |
Chemical scrubber towers |
| SMDP3 |
Polypropylene |
0.3 |
33 |
490 |
96.90 |
Low pressure drop scrubbers |
| SMDT |
Teflon |
0.3 |
85 |
220 |
95 |
Very corrosive services |
| SMD1X |
Metal/PP Mix |
/ |
200 |
625 |
95.60 |
Mist removal of polar / non-polar mixtures |
| SMDF |
Fiber Glass |
/ |
135 |
300 |
95 |
Coalescer fine mists |
| SMD2X |
Metal/ Fiber Glass Mix |
/ |
305 |
340 |
94 |
Fine mist conditions |
* Other types are also available for custom manufacturing as per request.