PureVent Centrifugal Oil Mist Separator Cleaning Crankcase Gas_1009
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Transcript of PureVent Centrifugal Oil Mist Separator Cleaning Crankcase Gas_1009
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Reducing emissions from internal combustion engines has been a major environmental concern. Up to now, most of the focus has been on exhaust gases.
However, crankcase gas has now come into focus as an area where further emission reductions can, and should, be made.
ApplicationPureVent is a compact centrifugal oil mist separator that, when connected to medium-speed diesel engines, removes 9899.9% of oil from crankcase gases.
Recovered oil can then be re-circulated to the oil sump and used again for engine lubrication.
Two installation options are available:
Open design for diesel engines releasing oil-free crankcase gas directly into the atmosphere.
Closed design for gas engines re-circulating clean gas to the turbocharger, thereby reducing the atmospheric emissions further and eliminating turbocharger fouling.
Benefits High separation efficiency. Provides 9899.9% separation
efficiency at 40150 m3/h.
Stable pressure conditions. No pressure drops or clogging associated with filter cleaning solutions. The continuous outflow at constant flow stabilizes pressure in the crankcase.
Recovered oil can be re-circulated to oil sump.
No hazardous waste. Elimination of oily filter disposal costs.
Long maintenance intervals. Two-year service intervals eliminate the frequent maintenance requirements associated with filter replacement.
PureVentCentrifugal oil mist separator for cleaning crankcase gas
The PureVent centrifugal oil mist separator removes 9899.9% of oil from crankcase gases.
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Operating principleThe PureVent centrifugal separator consists of a disc stack made of com-posite lightweight polymer material, which is enclosed in an aluminium housing. Connected to this is an electric motor that drives the disc stack. A frequency converter unit controls the separator motor.
Uncleaned crankcase gas enters through the inlet at the bottom of the unit and passes into the rotating disc stack.
The oil mist is separated in the disc stack; the oil drops are collected on the separator housing inner wall and drained at the oil outlet.
For gas engines, the cleaned air can be re-circulated to the engine turbo-charger. This closed system enhances engine performance and safeguards the engine since it eliminates risk of turbo -charger fouling or oil accumulation in the intercooler. Most importantly, a closed crankcase ventilation system eliminates all emissions of crankcase gas.
PureVent connected to an engine. The dotted line represents the collected oil that can be re-circulated to the engine.
Open crankcase ventilation system(for liquid fuel engines)
Closed crankcase ventilation system(for gas engines)
Clean gas outlet
Frequency converter controlled electric motor
Separator disc stack
Separator housing
Drain oil outlet
Crankcase gas inlet Flexible mounting
PureVent working principle.
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8007000 100 600200 400300 500
Pa
4000
3500
3000
2500
2000
1500
1000
500
0
900
m3/h
Pump curve.
Sep
arat
ion
effic
ienc
y %
4003500 50 300100 200150 250
100
96
94
90
86
84
80
450
82
88
92
98
m3/h
Separation efficiency vs. flow.
100.1 1
Gra
de
effic
ienc
y %
Particle size (in microns)
100
90
80
70
60
50
40
Grade efficiency at 180 m3 per hour.
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Operations Maintenance intervals
Major Service every 16000 hours or five years, whichever comes first.
System manual includes detailed information in electronic format or paper copy: Operating instructions Alarms and fault finding Service and spare parts
Technical data
Performance Capacity Max. 800 m3/hInlet gas temperature Max. 80CNominal flow 150 m3/hCleaning efficiency at nominal flow 98%Sound level 78 dB (A)
Dimensions and weights Size (height x length x width) 698 x 342 x 401 mmWeight 39 kg
Ambient conditions (operation) Surrounding temperature +5 to +50CElectric cabinet +5 to +45CHumidity Must not be exposed to water
Electrical system Operating voltage Three phase 380480 VACFrequency 50 or 60 HzPower consumption Max 1.5 kW
Separator Rotation speed 7200 rpmNumber of discs 185Housing Aluminium castingStart time 15 secondsStop time 60 secondsMounting angle Max. 3 from vertical line
EMD00108EN 1009 Alfa Laval reserves the right to change specifications without prior notification.
Pur
eVen
t is
a tra
dem
ark
owne
d by
Alfa
Lav
al C
orpo
rate
AB
. ALF
A L
AVA
L is
a tr
adem
ark
regi
ster
ed a
nd o
wne
d by
Alfa
Lav
al C
orpo
rate
AB
.
How to contact Alfa LavalUp-to-date Alfa Laval contact details for all countries are always available on our website at www.alfalaval.com
Gas outlet
Oil outlet
x 114
x 1
1
x 8
9
Gas inlet
ConformityThe mark of conformity confirms that the equipment complies with European Economics Area (EEA directives).
Connections