(IMABARI, Japan) — Tenneco will showcase its complete urea dosing control, fluid handling and catalyst solution for selective catalytic reduction (SCR) aftertreatment at the 2015 BariShip Maritime Fair in Imabari, Japan, on May 21-23. The system features an integrated soot blower option, which ensures effectiveness of NOx reduction and overall catalyst performance when high sulfur fuels are used or engines operate at low exhaust temperature levels.
Tenneco’s SCR aftertreatment system features a complete dosing control solution specifically designed for marine engine applications up to 7,500 kW or 10,000 hp. The system enables auxiliary and propulsion engines to meet EPA Tier 4 and IMO Tier III regulatory requirements and provides precise and reliable delivery of liquid urea via a proprietary, high-performance injector design, a precision mechatronic fluid delivery pump, and customizable remote monitoring and controls.
The integrated soot blower is designed for use with a range of high-sulfur fuels, including marine diesel oil (MDO), and heavy fuel oil (HFO), and enables the SCR aftertreatment system to deliver consistent emissions reduction performance by preventing ash and soot from blocking the catalyst. The result is more effective NOx reduction and overall catalyst performance over the life of the system
“We’re committed to developing diesel engine aftertreatment solutions that meet important marine regulatory requirements and deliver the performance expectations of global marine market customers,” said Timothy Jackson, chief technology officer, Tenneco. “The ease with which the SCR system can be incorporated into marine propulsion and auxiliary engine applications demonstrates Tenneco’s full-system integration expertise.”
SCR system features
The SCR system’s modular design enables seamless integration for a broad range of engine sizes and works with electrically or mechanically controlled engines. It has been validated for durability and all components are easy to maintain and service without the need for special tools.
The fluid delivery system with dosing control software is capable of managing multiple injection points and sensors. The system can support urea flows up to 120 meters, which enables a wide array of installation options. Airless urea injection provides high dosing accuracy and consistency without the need for designated compressed air.
The system’s unique human machine interface (HMI) can be accessed on the front of the fluid delivery box or remotely via a touch screen tablet. It features an easy-to-use interface to access onboard diagnostic functions and to monitor and control all system parameters including but not limited to NOx reduction performance and urea concentration levels in real time.
Tenneco’s large engine SCR system is designed to meet the requirements of major maritime classification societies including the ABS (American Bureau of Shipping), DNV GL (Det Norske Veritas Germanischer Lloyd), CCS (China Classification Society), KR (Korean Register of Shipping) and Class NK (Nippon Kaiji Kyokai). The system is currently undergoing sea trials and is expected to be ready for production later this year.