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Exhaust Gas Cleaning


Exhaust Gas CleaningOlav Knudsen, Head of R&D, Exhaust Gas Cleaning


Technology history

~1000 Inert Gas Systems sold since 1972

~3000 Inert Gas Generators sold with scrubber section


Tests with MAN Diesel in Holeby


Test period Oct 2008 – Jan 2009

Tests mainly based on fresh water

1 MW MAN 4-stroke Engine

MCR @ 25/50/75/100%

SOx 99%

PM up to 80%


Advantages Hybrid EGCsystem

Running on SW at open sea whenever possible

(lowest costs, ease of operation)

Zero discharge whenever required

(ports, estuaries, sensitive area’s)

Ability to cope with low alkalinity waters (Baltic, estuaries, rivers)

No switching between MGO/HFO -> maximum fuel savings

Compact water cleaning, lowest possible FW/NaOH consumption

Maximum flexibibility


Technical data Tor Ficaria

Technical data

Year built 2006

Length 199,8 meters

Width 26,50 meters

Speed 22,5 knots

Cargo capacity 3,831 lane meters

MAN B&W type 9L60 MC-C (21MW)

Classification LRS


EGC installed on Tor Ficaria

Technical data: In operation since May 2010

Height 10.5 Meters

Length 8.2 Meters

Diameter 4.6 Meters

Weight empty 24T

Weight with water 32T

Exhaust gas 192,000 Kg/h

Material SS alloys

PM Scrubbing Jet + venturi

Sea water pump 200KW/1000m3/h

Length

Diameter

He

igh

t


DFDS Tor Ficaria- world largest scrubber on a vessel



DFDS Tor FicariaFunnel - modification

Before During After

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Switching between SW and FW- Operation on FW in sensitive areas

SW

NaOH

Scrubber

Exhaust gas

No discharge water No Environmental Impact Assessment (IEA) to local EPA

Low engine power low NaOH consumption


Switching between SW and FW- Operation on SW at open sea

SW

Scrubber

Exhaust gas

Slowly cleaning of the accumulated water at open sea only a relative small watercleaning unit is required.

Sludge for disposal at land

Brine


Switching between SW and FW- Operation on SW at open sea

SW

Scrubber

Exhaust gas

No NaOH consumption

Slowly filling up the tank again to prepare it for arrival to a sensitive area Only arelative low FW flow is required.

FW supply


Results Tor Ficaria- Summary

Sulfur emission after scrubber below the 0.1 % sulfur limitin 2015 with HFO

pH level of discharge water at 3 – 5 depending onexhaust gas and water flow

Below limit on dissolved oil in discharge water (PAH)

Below limit on soot particles in discharge water (Turbidity)

More than 1000 hours of operation

Valuable data for further optimization


Conclusions

90 years of experience in the maritime industry

40 years of scrubbing experience from flue gasinstallations

Maximum cost savings and flexibility with hybrid EGCSystem

Far largest EGC system in continuous operation on TorFicaria - 21 MW MAN B&W

Short pay back time 1-2 years

exhaust gas cleaning · presentation series | © aalborg industries | jul 2010 exhaust gas...

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