Development of DPF and DeNOx Combined for Rubber-Tired Gantry Crane (RTG)

概要

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Recently, the regulation of the diesel engine (DE) exhaust has become stricter due to environmental considerations. It is now required to take countermeasures against DE exhaust on the material handling of equipment in the container terminal. Mitsui Engineering & Ship Building Co., Ltd. (MES) has proposed to the market a solution for DE exhaust of Rubber Tired Gantry Crane (RTG) and has developed a combined system of Diesel Particulate Filter (DPF) and NOx Reduction System (DeNOx) . A Continuous Regenerating Trap method is newly applied for DPF. An Urea Injecting SCR method is used to improve the DeNOx performance of the system. With these new methods, a target reduction rate of 50% for PM, and 80% for NOx have been achieved. This confirmed by measurement and analyzing field data of the RTG in operation. The system was mounted on the RTG and its durability and reliability were verified through the pattern test for each operation mode, and throughout 1, 500 hour operations. In 2006 MES acquired the certification of DPF from the U. S. Environmental Protection Agency (USEPA) and the California Air Resource Board (CARE) . In 2007 orders were placed by the Port of Los Angeles (POLA) .