Operating Experience of a Dry Low NOx Combustor and SCR in a Japanese Utility, and Future Developments

Abstract

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.

Development Study of 1500°C Class High Temperature Gas Turbine

“…The concept of the combustor for the high temperature gas turbine will be similar to the combustor that is installed at the Tohoku Electric Higashi Niigata Power Station [4] and has been successfully operated for about 5 years. [5] (See Figures 5 and 6.) The combustion system is composed of a pre-mix type combustor, the transition piece, and bypass air system.…”