Centrifugal Separation
Separation Devices Relying Primarily Upon Centrifugal Force
Expected Efficiencies of
Separation Methods
METHOD
EFFICIENIES
Gravity
20 – 100 Microns
Centrifugal
10 Micron
Demister Pad
3 –10 Micron
Vanes
3 – 8 Micron
Filter Coalescer
0.3 Micron
What is a Micron?
25.4 mm
25,400 MICRONS
1 MICRON
.000039 INCH
LOWEST LIMIT
OF VISIBILITY
(NAKED EYE)
40 MICRONS
MICROSCOPIC
0.2 uM TO 40 uM
ULTRA-MICROSCOPIC
.001 uM to 0.2 uM
Micron Basics -SIZE COMPARISON TABLES
US SIEVE # MESH/INCH OPEN- INCH
50
52
.0117
70
72
.0083
100
101
.0059
140
143
.0041
200
200
.0029
270
270
.0021
325
323
.0017
400
--.0015
INCHES
1.0
0.0394
1/64
0.0000394
MILLIMETERS
25.4
1.0
-.001
OPEN-MICRON
297
210
149
105
74
53
44
37
MICRONS
25,400
1,000
400
1.0
Ultra Microscopic
Microscopic
Normal Eyesight
Quiet Atmosphere
Disturbed Atmosphere
Tobacco Smoke
FOG
Rain Drop
MIST
Sea Salt
N H4Cl Fumes
Oil Smoke
Virus &
Protein
Bacteria
Dust Causing
Lung Damage
H2 SO4 Mist
Rosin Smoke
Carbon Black
Sulfied Ore
Spray-Dried Milk
Pollens
Ground Limestone
Stoker Fly Ash
SO3 Mist
Pigments
Oil Smoke
Zinc Oxide Fumes
Pulverized Coal
Alkali Fumes
Metallurgical Fumes
Pulverized Coal
Fly Ash
Foundry Dust
Cement Dust
Metallurgical Dust
Silica
Streptococcus Pyogenes
Talc
Human Hair
Blood Corpuscle
Cyclone Separators
ANDERSON Hi-EF
AMCS - Multi-Cyclone
AFS - Filter Separator
ACF - Coalescing Filter
.001
.01
0.1 0.3
1.0 3.0 5.0 10
100
1000 Microns
Efficiency
What do People Mean?
- Percent Removal Rate
i.e.. 99%, 99.5%, 100%
- Total Removed by Count
% Of Total Particles Of A Certain Range
or Minimum Size.
i.e. 99% of all particles 10 microns and larger.
i.e. 100% of all liquid particles 8 microns and
larger, and 100% of all solid particles 8
microns and larger.
Anderson’s Centrifugal Type
Separators
• L and LC - Inline Separators Vertical
Down Flow and Horizontal
• TL - Inline Separators
Horizontal
Shorter face to face
• 99% of 10  and Larger Liquid
and Solid Particles
Anderson’s Centrifugal Type
Separators -Cont
• Combination Separator Traps
- 81S, HS, HSW - Inline
• Exhaust Heads
- Cast and Fabricated
• BI - Internal Steam Drum Separator
Anderson’s Centrifugal Type
Separators - Cont.
• AMCS - Multi-Cyclone Separator
• Handles Heavy Solid Loadings
• 100% of 8  and Larger Liquid Particles
• 100% of 5  and Larger Solid Particles
• 99% of 5 to 8  and Larger Liquid Particles
L Type Centrifugal Separator
• ASME Code Design Standard
• 2-1/2 Inch to 12 Inch Flanged unit standard
• Two Standard Models:
-150 PSIG (10 BARG) @ 500 ºF (260 ºC)
-300 PSIG (20 BARG) @ 500 ºF (260 ºC)
• Horizontal & Vertical Down Flow (Vert.
Down Flow Has Higher Liquid Capacities)
• HI-EF Element Standard
• Low Press Drop (<1 PSI, .01 BAR F-F)
• Very Economical For ASME Code Unit
• Popular w/ Air Compressors / Steam
Systems / Refining
• 99% of 10 : 2:1 TURNDOWN
• Solids & Liquids
• Maximum Entrainment: 5% By Weight
LS Type Centrifugal Separator
• “S” Stands For Special
• Any Special Material 304, 316,
and Exotics
• Sizes Above 12”
• Non Standard Pressures
• Special Configurations
• Mix & Match Elements
• Popular w/ A&E Firms, OEMS
• Same Efficiency: 99% 10 , 2:1
Typical Turndown. 5% by Weight
Anderson’s
Centrifugal Type
Separators
wet
gas
• HOW CENTRIFUGALS
WORK
• PERFORMANCE
• QUICK SIZING
Clean
Gas
AMCS Multi-Cyclone Centrifugal
Separator
• Nested Multi-Cyclone Elements.
• Excellent For Dry Only, Low
Maintenance
• Efficiency: 100% of 5  Solids, 100%
of 8  Liquids.
• Versus HI-EF Centrifugal: More
Efficient But Higher P (2-3 PSID OVERALL)
• Basic Design No Slugging, MAX 5%
Liquid/Solids by Weight
• High Liquid Capacity Models
Available
AMCS
Multi-Cyclone
Centrifugal
Separator
AMCS Multi-Cyclone
Centrifugal Separator
Required Information
• The Big Picture
• Gas
• Flow Rate
• Removal of What?
• Slugging / High Solids
• Required Removal Efficiency
• Minimum / Maximum Operating Pressure
• Minimum / Maximum Operating Temp.
Required Information
• Pressure Drop
• Arrangement
• Connections
• Materials
• ASME Code Information
Instrumentation
Gage Glass
Liquid Level Controller
Liquid Level Switches
Dump Valves
Pressure / Temp. Gauges
Relief Valves
P Indicators and Transmitters
Conclusion
• Separators are critical pieces of
equipment for the smooth operation of
most all processes.
• Different applications require different
approaches, different styles of separators,
and sometimes units in combination.
• IT IS IMPORTANT TO GET ALL THE
INFORMATION CORRECT THE FIRST
TIME-- SAVES TIME AND $$
More Than Just A Separator. . .
Systems Design
& Integration
Filtration
Services
Equipment Design
& Manufacturing
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