Wärtsilä has received an order from an unnamed customer to provide a hybrid exhaust gas cleaning and selective catalytic reduction (SCR) system.
The hybrid exhaust gas cleaning system allows open-loop and closed-loop scrubbing to be carried out at any time.
Wärtsilä said the system can use exhaust gas cleaning using only seawater when the vessel is at sea but when manoeuvring or in port, the system can be closed, re-circulating the water already in the scrubber.
The system will allow the vessel to meet the 2015 0.1% sulphur limits within Emission Control Areas (ECAs) as well as the proposed 2020 global 0.5% sulphur limit.
Additionally, the SCR system, which is incorporated into the engine downstream of the exhaust gas turbine, is claimed to remove up to 95% of NOx from the vessel’s emissions, enabling compliance with IMO Tier III standards from 2016.
The Wärtsilä SCR system can be integrated with all the company’s engines and exhaust gas cleaning systems to meet upcoming IMO, EU and US regulations.
Apart from the flexible hybrid scrubber, the company also provides a closed-loop scrubber and open-loop scrubber, previously known as the Hamworthy Krystallon Exhaust Gas Cleaning System.
Image: Wärtsilä’s hybrid exhaust gas cleaning and SCR system will enable vessels to meet the 2015 0.1% sulphur limits within ECAs and the 2020 global 0.5% sulphur limit. Photo: Hamworthy.