© Alfa Laval Slide 2 www.alfalaval.com
© Alfa Laval Slide 3 www.alfalaval.com
EcoStreamBilge water treatment
PureBallastBallast water treatment
PureVentCrankcase gas cleaning
www.alfalaval.com
A growing environmental portfolio
© Alfa Laval Slide 4 www.alfalaval.com
A known issue – but growing interest• Land-based
requirements
• Interest is also growing among government bodies and larger organizations
© Alfa Laval Slide 5 www.alfalaval.com
The other side of emissions
• Engine exhaust gas is the main part of emissions
• Though only a small part, gas from the crankcase is also of concern
© Alfa Laval Slide 6 www.alfalaval.com
Available solutions
• Air traps
• Cyclones
• Filters
“Existing solutions typically don’t live up to what they promise”
© Alfa Laval Slide 7 www.alfalaval.com
Filters the most common technologyPressure drop and gradual clogging of traditional filters
Reliability and performance
Operations and the environment
Difficulties with crank-case pressure level, stability and control
Lower filtration efficiency
Costly filter replacementOily hazardous wasteCostly onshore disposal
© Alfa Laval Slide 8 www.alfalaval.com
• Low LCC
• Releases 98% oil free-air
• Size (Only 30 l in size)
• No maintenance(Unit replaced after 2 years)
• Strong Patents
• Meet future legislations
• Better working environment
PureVent– Customer benefits
695 mm
© Alfa Laval Slide 9 www.alfalaval.com
PureVent– Working principle
Clean gasoutlet
Crankcase gas inlet
Drain oiloutlet
© Alfa Laval Slide 10 www.alfalaval.com
PureVent– Installation principles
• No environmental impact
• Actually improves engine performance
Filtered crankcase ventilation system(for liquid fuel engines)
Closed crankcase ventilation system(for gas engines)
© Alfa Laval Slide 11 www.alfalaval.com
Comments from the field
“Aboard "Freedom of the Seas" we have a Pure Vent unit installed on DG#1. Total days in service = 1 Month.
During this month in service we have collected appr. 10-15 ltr. of Lub.Oil from the oil mist inside the Crankcase ventilation pipe by means of the Pure Vent Unit. This oil will be reused when the collecting pail is full. We have evaluated the unit during this month of service and have only positive comments so far.”
© Alfa Laval Slide 12 www.alfalaval.com
Comments from the field
• The Pure Vent requires a minimum of maintenance (the total cost per year is yet to be determined).
• The Pure Vent is relatively easy to install
• The recovered oil can be reused
• Big benefits for the environment and ship's cleanliness
• Reused oil on a yearly basis for DG#1 will be in figures of 120-180 ltr.
• Reused oil on a yearly basis for six (6) engines will be in figures of 720-1080 ltr.
© Alfa Laval Slide 13 www.alfalaval.com
Technical data
• Capacity 0 – 400 Nm3/h (98% efficiency)400 – 800 Nm3/h (92% efficiency)
• Gas temperature 20 – 80°C
• Oil content in gas 0 – 1000 g/m³
• Connection, inlet 112 mm
• Connection outlet 89 mm
• Connection, drain 10 mm
• Voltage 380-480 V / 50-60 Hz
• Electric motor, power 1,5 kW
• Maintenance PureVent requires no maintenance or planned inspections during the first two years of operation.