Application of Exhaust Gas Cleaning
Technology for the Great Lakes
Green Marine Green Tech Conference
May 31, 2013
Agenda
Regulatory framework
Scrubber overview
Great Lakes considerations
Application to Algoma Equinox Class vessels
Algoma Central
Corporation
Domestic Product Ocean Real
Dry-Bulk Tankers Shipping Estate
Algoma Dry- Algoma Algoma Algoma Algoma Marbulk Canada Algoma
Bulk Ship Repair Tankers Tankers Shipping Ltd. Inc. Central
Limited International / Marbulk Properties
Vessel Inc. 2 foreign flag Shipping Inc.
26 vessels refurbishm 7 self-unloaders &
plus 6 ent and domestic 1 foreign 3 bulkers (on 4 foreign flag Properties in
Equinox steel tankers flag tanker Bareboat self-unloaders Sault Ste.
Class & 2 fabrication Charter to Dry- (50% owned) Marie, St.
CWB Equinox bulk) Catharines,
Class on Waterloo
order
3
Regulatory Framework
Coastal Emission
Control Area (ECA)
August 1, 2012
Great Lakes regulated
as an ECA under
Canadian & US rules
Domestic Fleets
US rule contains
waivers and
exemptions
Canadian regulation
contains an alternative
compliance method,
Fleet Averaging.
Fleet Averaging
Available to Canadian vessels operating exclusively in
the GLSLR
Annual average fuel sulphur limit for a fleet
Declines from 1.5% in 2012 to 0.1% in 2020
Elements:
Fuel sulphur management
Efficiency adjustments (new vessels and engines)
Scrubbers or other technology
Cumulative averaging
Preparing to install 25MW
Hybrid Scrubber –
Sembawang April 2013
Factors in Choosing A
Scrubber System for The
Great Lakes
Chemistry:
Sulphur reduction versus water pH
100%
SO2 reduction
50%
8
0% 14
pH
03 June 2013 10
Alkalinity is typically less than half that
of typical sea water (130mg/l)
Chlorides are at very low levels,
reducing system corrosion problems
Containerships VII SOx measurements
•Fuel sulphur content 1.84 %.
•Measurement by ackredited third party 2.12.2011.
13 © Wärtsilä This document is the property of Wärtsilä Corporation and shall not be copied or reproduced without the consent
of the owner.
EGCS EQUINOX
Exhaust gases from Main
Engine, Auxiliary Engines
Vessel equipped with and Thermal Oil Heater
exhaust gas scrubber will be cleaned by
which allows the use of scrubber
cheaper HFO Lake water make-up for
Scrubbers remove 97% bleed and evaporation
of sulphur & 65% of Effluent is treated
particulate matter. Sludge disposed to shore
Scrubber is a “Closed”
type and designed for
use in fresh water.
The only visible emission
will be steam.
4. Scrubber Unit
3. Exhaust stream
2. System water
1. Alkali
5. Effluent Control
EGCS EQUINOX
EGCS - EQUINOX
ALKALI
Sodium Hydroxide - 50% solution available.
Corrosive and reactive.
Can be stored in carbon steel tank.
Storage is ship specific.
Specific gravity 1.52
Freezing is an issue
Exothermic reaction
Bunkering precautions
EGCS - EQUINOX
System Water
Temperature Control required
Bleed-off and top-up
Monitoring system
EGCS - EQUINOX
Exhaust gas stream
Main and auxiliary sources
Temperature effect
Pressure control
Pipe routing
EGCS - EQUINOX
Scrubber Unit
- Corrosive resistant material
- Dimensioned to suit usage
- Internal arrangement
EGCS - EQUINOX
EGCS - EQUINOX
Effluent control
Buffer tank
Water treatment
Monitoring
Discharge overboard
