35Selective Catalytic Reduction SystemSCR, NOx, Tier IIINIIGATA POWER SYSTEMS CO., LTD.INQUIRIES 14-5, Sotokanda 2-Chome, Chiyoda-ku, Tokyo, 101-0021, JapanTel : +81-3-4366-1226 Fax : +81-3-4366-1310E-mail : info1_sales1@niigata-power.comhttp://www.niigata-power.com/english/index.htmlSelective Catalytic Reduction System◦Niigata has developed marine SCR compliant with the NOx Tier III enforced by the IMO, and prepared SCR for each engine (550 to 6600kW) as the line-up.◦Niigata has delivered the first SCR system for the marine propulsion engine in 1995, nearly 20 years ago, which is still working. Based on such experiences, Niigata started to supply SCR which can be apply to not only new building ships but also existing ships.◦Development of this SCR system utilizes the part of technologies and findings for compact design in the research undertaken by Niigata for “Super-clean Marine Diesel” Project of the JSMEA.Selective Catalytic Reduction SystemEnvironmental Technologieshttps://www.yanmar.com/global/YANMAR CO., LTD.Selective Catalytic Reduction SystemYANMAR will offer you our SCR system, which is suited perfectly to our engine specifications, to meet the requirements of Tier III NOx emission standards by IMO. NOx emissions can be reduced by more than 80% after our SCR system is loaded.A catalyst reactor is set up after the turbocharger in flow. Our SCR system is combined with a bypass system both for switching in Emission Control Areas (“ECA”) and for saving space in the engine room. The urea injection nozzle with the air-assisted is implemented within a branched exhaust pipe. The piping design is essential in converting (waste) into ammonia, which functions as a reducing agent. The reactor is also equipped with an automatic soot blower system. Each engine requires a catalyst reactor, whereas only one set of pumping unit and one set of control panel are installed for all reactors.On the other hand, an engine with SCR system is designed to set a minimum exhaust gas temperature depended on the sulfur content in fuel. With this design, our engine can achieve a high durability and an excellent reliability for a long time.The SCR System with Three Unit Engine InstallationsINQUIRIES No.1 Sales Group Overseas Sales DivisionMarine Products Sales and Marketing DivisionPower Solution Business2-1-1, Yaesu, Chuo-ku, Tokyo, 104-8486, JapanTel : +81-3-3275-4909 Fax : +81-3-3275-4969http://www.yanmar.com E-mail : ichiro_fuwa@yanmar.com


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