In 2004, the MARPOL Annex VI Regulations for the Prevention of Air Pollution from Ships were agreed upon and adopted. Regulation 14 of the annex established a stepwise reduction of permissible SOx emissions. As of 1 January 2020, the global sulphur cap will be 0.5% m/m, while the previously adopted limit of 0.1% m/m in Emission Control Areas (ECAs) will remain in force.
The author of this whitepaper is Alfa Laval
Complying with Regulation 14 will have a tremendous impact on maritime industry. Vessels will need to find ways to reduce their SOx emissions, and there are multiple strategies owners/managers can choose to achieve the necessary reduction. One of these is the
installation of a SOx scrubber, which will allow continued use ofhigh-sulphur fuel oil (HSFO) while keeping SOx emissions at a compliant level.
Although the boiler is only a small source of a vessel’s overall emissions, it must also be connected to the scrubber system if HSFO is used for the burner. This means that the boiler will be affected by changes in back pressure, resulting in non-optimized combustion and potential safety risks.
This document aims to provide information about the interaction between boilers and scrubber systems. In addition, it offers an overview of the Alfa Laval Aalborg solutions for maintaining boiler performance and safety when a scrubber is installed.