The first high-pressure SCR for two-stroke engines, which meet IMO's Tier III regulations for engine emissions of nitrogen oxide (NOx), has passed factory acceptance test in January 2015 and entered into service in August the same year. In the course of this project SB Broneske supplied Winterthur Gas & Diesel Ltd. (WinGD) with vibration mounts and expansion bellows for very heavy loads. WinGD is one of the leading developers of two-stroke low speed gas and diesel engines which are sold under the Wärtsilä brand name.

SCR (Selective Catalytic Reduction) systems have been developed for cleaning exhaust gases of marine diesel. The combustion process of the air-diesel mixture cause exhaust. Exhaust fumes contain some harmless substances such as water vapor, carbon dioxide and nitrogen. They also contain carbon monoxide, hydrocarbons and nitrogen oxides (NOx). However, these latter exhaust fumes are very dangerous to humans and nature. The SCR system acts as a crucial part in the purification of diesel exhaust gases. In this system injecting urea dissolutions into the exhaust pipe reduces nitrogen oxides (NOx).

SB Broneske offers elastic support for SCR systems with special vibration mounts. For square systems we choose four fix points and four anchorage points for an optimal elastic support. However, it must be ensured that the lower fix points have uniform spring deflections so that the structure-borne noise is evenly reduced and vibrations are avoided. 

For more than 40 years now, SB Broneske has been providing unique vibration mounts for the elastic support for exhaust pipe systems. These vibration mounts have to meet strong requirements: They have to be shear proof so that in case of fire they keep the exhaust pipe in position. During storms they also have to withstand dynamic movements. It is very important that all supply circuits are strictly separated from and to the SCR in order to avoid impact borne sound bridges.

Since manufacturing engines with a high-pressure SCR system, reliable and functional elastic supports are required for the innovative exhaust gas cleaning systems. Every exhaust gas cleaning system has its unique features and SB Broneske‘s goal is to provide their customers with the most efficient and reliable elastic support.

Please follow this link to read the press release of WinGD about the first Wärtsilä two-stroke engine with Tier III compliant high pressure SCR.