# Exhaust Gas Cleaning
With Aalborg Industries’ exhaust gas clean

ing system it is possible to clean the exhaust gas from the ship’s main, auxiliary engines and boilers by scrubbing the exhaust gas in an open loop with sea water or a closed loop with fresh water. Due to it’s hybrid functions it provides a unique modular and flexible design with the highest degree of operational flexibility. Using the exhaust gas cleaning system from Aalborg Industries enables shipown

ers to continue operating on heavy fuel oil instead of more expensive marine gas oil in order to meet the new IMO regulation, lim

iting the amount of sulphur in exhaust gas, coming into force in 2015 (ECA areas) and 2020 (worldwide).Above: Installation of the exhaust gas scrubber in the funnel of DFDS’ Ro-Ro vessel “Tor Ficaria”. Below: Exhaust gas scrubber illustration.



# Exhaust Gas Scrubber facts

n Cost-saving solution (able to operate on HFO

instead of expensive low sulphur MGO) n Short payback time (1 to 2 years) n Exhaust gas cleaning system in compliance

with MARPOL Annex VI – MEPC 58 and 59 n Sulphur removal rate >98% (exceeding the

IMO requirements) n Particulate Matter (PM) trapping up to 80% n A unique and flexible solution allowing the

exhaust gas scrubber to switch between sea water (open loop) and fresh water (closed loop) n Built on well-proven technology and tested

at MAN Diesel’s test facilities n The world’s largest M.E. exhaust gas scrub

ber (21 MW) installed and in operation. n Operating in closed loop mode only generates sludge in very small quantities n Operation power consumption: approxi

mately 1.5% of engine power 

## Introduction The most strict sulphur emis

sion limits can be found within emission controlled areas (ECA) as of 2015 (0.1 % sulphur allowed in fuel) while globally regulations enter into force from 2020 (0.5 % sulphur allowed in fuel) onwards. At the MEPC 58th Oct 2008 meeting, it was also finally settled that exhaust gas cleaning systems are allowed as an alternative to meet the sulphur emission requirements. In fact, there is no limit on the sulphur content in the fuel if a ship is equipped with an exhaust gas cleaning system. Exhaust gas cleaning systems have significant economical and environmental advantages. 

## Experience Aalborg Industries has more than 40 years of experience supplying scrubbers as an integrated part of Inert Gas Systems (IGS) onboard ships. During 2008, our experiences from these systems were used to design and test an exhaust gas cleaning system at the MAN Diesel (1 MW engine) test facilities in Denmark. 

## Installation on large Ro-Ro vessel The knowledge and experience from these tests were successively used to design an entire exhaust gas cleaning system onboard DFDS’ Ro-Ro vessel “Tor Ficaria”. A modular and flexible exhaust gas scrubber design with a high degree of operational flexibility as well as future possibilities for upgrading the equipment has been chosen for the Ro-Ro vessel “Tor Ficaria”. Installed after the 21 MW MAN engine, it is by far be the world’s largest exhaust gas cleaning system installed onboard a ship. The design work has been carried out in close co-operation with the marine engi

neers from DFDS and MAN Diesel. Comprehensive test scheme has been ongo

ing since several months through a range ofBelow: the Ro-Ro vessel “Tor Ficaria” with the scrubber installed in the modified funnel. As pioneer in this business we are also experienced in the legislation and cooperation with local environ

mental authorities. 

# Exhaust Gas Cleaning

Exhaust Gas Cleaning Arrangement operation conditions to secure full compliance with the 2015 Marpol Annex VI legislation. MAN Diesel has participated intensively in the design work to ensure a smooth and safe interface with the main engine. 

## Switch between sea water and fresh water operation The hybrid system will be able to operate with sea water (open loop) and fresh water (closed loop). At open sea, the system operates with sea water and in harbours and estuaries the system can operate on fresh water in a closed loop system, without generating any sig

nificant amount of sludge to be handled at port calls. The Exhaust Gas Cleaning system has been developed with a view for upgrade oppor

tunities within design for compliance with future legislation. 

## Case studies Aalborg Industries offers case study consul

tancy for Exhaust Gas Cleaning solutions for new building and retrofit. To initiate a case study on your vessel, please contact: exhaust-gas-cleaning@aalborg-industries.com

Closed circuit
Open circuitDATA SHEET series© Aalborg Industries, Rev. 1, August 2010 , SMM



## exhaust-gas-cleaning@aalborg-industries.com 

# www.aalborg-industries.com About Aalborg Industries Aalborg Industries is the leading supplier of steam boilers, ther

mal fluid heaters, heat exchangers and inert gas systems. We offer reliable, innovative and environmentally friendly products with a low life cycle cost. The Aalborg Industries Group operates a Global After Sales service from its companies in 14 countries. Among Aalborg Industries’ latest environmentally friendly prod

ucts and technologies are ballast water treatment systems based on a unique combination of UV light and ultrasound, new and cost-saving sulphur emission abatement technologies to clean exhaust gas from ship engines and a continued optimisation of large waste heat recovery boilers. Other green solutions involve the MISSIONTM TCi boiler series, MGO burner modifications, superheaters for aux. boilers, cool

ing systems for LNG, economizers after aux. diesel engines and electrical steam generation.

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