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Wire Mesh Demister

Wire mesh mist eliminators are well suited to remove mechanically formed entrainment from packed and trayed process towers, spray columns, venturi scrubbers and other gas scrubbing devices. They are also a widely used de-entrainment device in knock out drums and separators. With its superior design, Saiptech has developed a serious of mesh type mist eliminators depending on direction of gas flow and the complexity of wire structure.

SPT mesh pad type mist eliminators remove 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.




Manufactured in virtually any size from a wide range of material, over 14 different styles can be designed and fabricated.

Materials Available:

  • Polypropylene     PVDF     PTFE     ETFE
  • Carbon steel      Stainless steel
  • Titanium          Monel     Hastalloy
  • Other special materials are available on request.



Type

Material

Wire Diameter

Mesh Density

Surface Area

Free Volume

Application

mm

kg/m3

lb/ft3

m2/m3

ft2/ft3

%

SMD1

Metal

0.28

80

5

145

44

99%

Moderate fouling, minimum pressure drop

SMD2

Metal

0.28

110

7

200

60

98.60%

Light fouling, fine entrainment

SMD3

Metal

0.28

144

9

258

79

98.20%

Standard general-purpose media

SMD4

Metal

0.15

144

9

482

147

98.20%

High efficiency for fine entrainment

SMD5

Metal

0.28

168

10.6

310

93

97.90%

General purpose

SMD6

Metal

0.28

192

12

350

110

97.60%

Optimum efficiency & pressure drop

SMD7

Metal

0.15

192

12

643

196

97.50%

Very high efficiency in clean service

SMDP1

Polypropylene

0.3

75

4.5

820

250

93%

Acid mists

SMDP2

Polypropylene

0.3

50

3.1

750

228

95.30%

Chemical scrubber towers

SMDP3

Polypropylene

0.3

33

2

490

149

96.90%

Low pressure drop scrubbers

SMDT

Teflon

0.3

85

5.3

220

750

95%

Very corrosive services

SMD1X

Metal/PP Mix

/

200

12.5

625

188

95.60%

Mist removal of polar / non-polar mixtures

SMDF

Fiber Glass

/

135

8.2

300

1000

95%

Coalescer fine mists

SMD2X

Metal/ Fiber Glass Mix

/

305

19

340

1115

94%

Fine mist conditions

  • Polypropylene     PVDF     PTFE     ETFE
  • Carbon steel      Stainless steel
  • Titanium          Monel     Hastalloy
  • Other special materials are available on request.

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