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PureSOx 2.0Exhaust gas cleaning for competitive ECA compliance



2

The proven route to

ECA complianceSOx scrubbers are the smart choice for complying

with sulphur limits in Emission Control Areas (ECAs).

The smartest choice of all is PureSOx from Alfa Laval.

A route well travelled

No choice of scrubber is more

secure than PureSOx. Built with

Alfa Laval core expertise and

decades of marine scrubber ex-

perience, PureSOx has been atsea since 2009, reliably cleaning

main and auxiliary engine exhaust

gas to ECA-compliant levels.

In fact, PureSOx has more

references than any other single

SOx scrubber technology.

Among them are repeat orders

from major customers, as well as

installations as large as 28 MW.

PureSOx from Alfa Laval offers:

• SOx removal rate >98% (exceeds IMO requirements)

• Open-loop, closed-loop or hybrid operation

• Reliable water cleaning in closed-loop mode

• Compatibility with all engines

• Proven compliance and strong references





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This is PureSOx 2.0PureSOx is a proven system with high flexibility, available in open-loop, closed-loop

and hybrid configurations that serve one or more exhaust gas sources. With theintroduction of PureSOx 2.0, the flexibility is even greater.

Proven technology

PureSOx removes over 98%

of SOx emissions, which easilymeets the 0.1% fuel sulphur

equivalent required in ECAs by

MARPOL Annex VI. In addition,

it traps up to 80% of the harm-

ful particulate matter (PM). Even

when engine load fluctuates,

PureSOx keeps emissions

firmly within ECA limits.

None of this is changed in

PureSOx 2.0. Instead, PureSOx2.0 strengthens the adaptability

and ease of use that make

PureSOx one of the most popular

scrubbers on the market.

PureSOx facts

• PureSOx has more references

than any other single SOx

scrubber technology

• Repeat orders for PureSOx

have been placed by major

customers

• Every PureSOx system ever

installed is in use and

operating within ECA limits

Advances in PureSOx 2.0

PureSOx 2.0 offers new advan-

tages that begin with getting

the scrubber on board. A 15%

smaller scrubber diameter, a

50% smaller control system and

greater modularity in the water

cleaning unit simplify both

design and installation.

Added to this is the ability to

handle exhaust gas from both

engines and boilers, or to place

the scrubber before the silencer

since it attenuates noise on its

own. Both of these options

reduce additional equipment.

If desired, you can even use

powder rather than a liquid

additive in closed-loop mode,

which means safer handling

and lower consumable costs.



Water cleaning unit

Sludge tank

Alkaline additiveFresh water

Scrubber

Sea waterSea water

Gas and water

monitoring

Pump

Pump Circulation tank

Plate heat exchanger

Core expertise

PureSOx in a hybrid configuration

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Alfa Laval is one of the few

suppliers with long-term scrub-

ber experience in the marine

environment. PureSOx builds

on decades of scrubber deliver-

ies as an integral component of

inert gas production systems,

which Alfa Laval has provided to

oil, chemical and LNG carriers

for over 40 years.

Another Alfa Laval core tech-nology in PureSOx is centrifugal

separation, which is used in the

PureSOx water cleaning unit.

Cleaning of the circulation water

is vital in closed-loop operation,

and centrifugal separation is

currently the only alternative that

performs reliably in rough waters.

The PureSOx water cleaning unit

minimizes sludge volumes, effec-

tively removes particles and allows

instant bleed-off of cleaned cir-culation water – without settling

time or filtering. In PureSOx 2.0,

it can be split into three sections

that are easy to get on board and

can be independently placed.



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Built for the way you sail

Hybrid flexibility

PureSOx is available in an open-

loop configuration, which uses

seawater, as well as a closed-loop configuration, which uses

desalinated circulation water and

an alkaline additive. However, the

system is most often installed

in a hybrid configuration, which

offers both open-loop and

closed-loop modes.

With a hybrid system, you can

use PureSOx in open-loop mode

to reduce operating costs when-

ever possible. When low sea-

water alkalinity or local regula-

tions demand it, you can quickly

switch to closed-loop mode and

continue using your scrubber.

Multiple exhaust gas sources

PureSOx can be integrated

into your vessel in many ways.

One of the most effective ways

is to design it with multiple in-

lets, which allows one scrubber

to clean exhaust gas from both

main and auxiliary engines, as

well as boiler exhaust gas. This

greatly reduces the footprint and

weight of the scrubber system,

which is especially useful for retro-

fits, where space is at a premium.

The PureSOx multiple-inlet sys-

tem has classification society

approval, and its double-disc

valves prevent any backflow

of exhaust gas into the engine

room when an engine or boiler is

not in service. The sealing air in

and around these valves ensures

that they cannot stick to the

valve housing or be impaired by

soot.

PureSOx is tailored to your specific vessel, based on

your priorities and sailing profile. An ideal combination

of flexibility and savings is often achieved by using a

hybrid system with multiple inlets.



A reference list of success

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Retrofit of the Ficaria Seaways The DFDS Ficaria Seaways is a RoRo

vessel with 4650 lane metres on four

decks. In 2009, it was rebuilt to accom-

modate more cargo and to receive the

first PureSOx pilot system, which is still

serving the 21 MW engine from MAN

B&W. The vessel has since clocked

thousands of hours of ECA-compliant

operation, and PureSOx has been

ordered for five sister vessels.

Retrofit of the Plyca

Installed in 2012, the PureSOx systemaboard the Spliethoff ConRo vessel

Plyca is the world’s largest SOx

scrubber. It serves two main and two

auxiliary engines from Wärtsilä with atotal of 28 MW. After extensive testing

at sea, Spliethoff decided to install similar

systems aboard five sister vessels.

See multimedia content and additional references at www.alfalaval.com/puresox

“We have seen that in

both open and closed

loop we can wash

down to a level below

0.1% sulphur.”

Kasper Moos, Vice President

Technical Org., DFDS

“We wanted to have a

completely independent

system, and that’s why

we chose the hybrid.

And that’s why we

chose Alfa Laval.”

Michael Liljeström,

Project Leader, Spliethoff



Alfa Laval in brief

Alfa Laval is a leading global provider

of specialized products and

engineered solutions.

Our equipment, systems and services

are dedicated to helping customers to

optimize the performance of their

processes. Time and time again.

We help our customers to heat, cool,

separate and transport products such

as oil, water, chemicals, beverages,

foodstuffs, starch and pharmaceuticals.

Our worldwide organization works

closely with customers in almost 100

countries to help them stay ahead.

How to contact Alfa Laval

Up-to-date Alfa Laval contact details

for all countries are always available

on our website at www.alfalaval.com

A l f a L a v a l a n d P u r e S O x a r e g l o b a l t r a d e m a r k s o w n e d b y A l f a L a v a

l C o r p o r a t e A B .

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