Over three years of successful operating experience with a dry low NOx combustor and SCR system used in a combined cycle power plant of a Japanese utility is presented. The dry low NOx combustor with pre-mix fuel nozzles was verified by field test at a NOx level of 65 ppm. The SCP system has been operated with an efficiency between 30% and 90%, and shows no degradation in 20,000 hours operation.

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