Rising demand for sulphur emissions control technology

Since its contract to retrofit three DFDS Seaways vessels with four Alfa Laval PureSOx systems last summer, both shipyard Remontowa and supplier Alfa Laval say they have learnt valuable new lessons to save customers time and money during the process.

Peter Leifland, president, Alfa Laval marine & diesel division, said: “Working with shipyards, ship owners and ship operators has provided us with deep insights into the challenges the industry is facing. Our job is to make sure that Alfa Laval solutions fit on board yet deliver long-term economy, reliability, simple installation, great operating flexibility and infrequent maintenance.”

Remontowa meanwhile says that it received solid support from Alfa Laval for the DFDS retrofits and consequently was able to achieve minimal changes to the existing ship arrangements and operation while ensuring cost effective installation for the customer.

A single-inlet PureSOx system was installed on the MV Petunia Seaways and another single-inlet system on the MV Magnolia Seaways. Each vessel is powered by a MAN 9L60MC-C main engine, providing an output of 21 MW. Meanwile, two single-inlet systems clean the exhaust gas from two GMT Sulzer 9ZA 50S engines, which provide a combined output of 21.6 MW, on the MV Selandia Seaways.

The Alfa Laval systems enable the vessels to continue to use heavy fuel oil with high sulphur content, yet comply with the upcoming 0.1% sulphur emissions regulations in 2015 and the global 0.5% sulphur emissions limit in 2020.