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国际清洁环境能源期刊
SJR: 0.195 SNIP: 0.435 CiteScore™: 0.74

ISSN 打印: 2150-3621
ISSN 在线: 2150-363X

国际清洁环境能源期刊

Formerly known as Clean Air: International Journal on Energy for a Clean Environment

DOI: 10.1615/InterJEnerCleanEnv.v7.i3.20
pages 203-220

DEVELOPMENT OF A LOW-NOx SWIRL BURNER FOR GASEOUS FUELS

O. Spangelo
Department of Energy and Process Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway
T. Slungaard
Department of Energy and Process Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway
T. Engebretsen
SINTEF Materials Technology AS, 7465 Trondheim, Norway
Otto K. Sonju
Department of Energy and Process Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway

ABSTRACT

A research and development project has resulted in a new low-NOx, fan-driven burner concept called the Swirl Burner. This patented concept is in the final stages of development. The Swirl Burner is a partially premixed, fan-driven gas burner with internal flue gas recirculation and possibilities for staged fuel and air supply. Gas mixing and flame stabilization are provided by a swirl-generating device with aerodynamically shaped wanes positioned in an annular airflow. Flue gas is recirculated into the combustion zone, providing a continuous ignition source. NOx emissions in the range 30−40 ppmvd at 3% O2 are measured for 100-200 kW with propane. Using methane as fuel, NOx emissions of about 20 ppmvd at 3% O2 are measured for 75−200 kW. CO emissions were kept below about 5 ppmvd. NOx and CO emissions were fairly constant over a wide range of fuel-air ratios. Similar results have also been obtained for a 20-kW burner and a 500-kW burner. In this article a detailed characterization of the 200-kW Swirl Burner and the experimental results will be presented.