APRIL 25, 2014 — Two new fishing vessels under construction at the Celiktrans shipyard in Turkey for Iceland's HB Grandi will be fitted with new versions of the Wärtsilä NOx Reducer (NOR) exhaust after-treatment systems.
Based on selective catalytic reduction (SCR) technology using a urea solution, the new NOR system features a flexible and more compact design to enable easier and faster onboard installation. It is also compatible for both marine diesel fuel (MDF) and heavy fuel oil (HFO) engine operation. The auxiliary units have also been improved; for example, centralised units for multiple installations with built-in redundancy are now available.
The order for the HB Grandi vessels was received during the fourth quarter of 2013 and Wärtsilä's equipment is scheduled for delivery in the second and fourth quarter of 2014.
"The new version of the Wärtsilä NOx Reducer is designed for installation onboard newbuild vessels, as well as for retrofitting to existing ships," says Giulio Tirelli, Director, Four-stroke Portfolio & Applications, Wärtsilä Ship Power. "It not only enables compliance with existing and future legislation, but maximises the overall environmental performance and profile of the vessel, giving the change to profit from possible subsidizing bodies supportive emission reduction schemes. The upgraded design is in response to customer needs in the areas of installation flexibility, easy operation and maintenance, minimizing the impact on ship design while maintaining full flexibility on fuel selection.
The Wärtsilä NOR enables vessels to meet the IMO Tier III NOx emission regulations, thus allowing them to operate freely within the current and planned Emission Control Areas (ECAs) designated by the IMO. Wärtsilä can optimise and deliver the engine and SCR as a fully tested, single package together with a Statement of Compliance for IMO's Tier III regulations.
The Wärtsilä NOR system can be operated together with other exhaust gas treatment systems, such as SOx scrubber systems.
The NOR reactor, which includes a soot blowing system and the catalyst elements, is available in a variety of shapes and sizes, and can be orientated either vertically or horizontally so as to optimize the use of available installation space. It can also be integrated with silencers.