Nitric oxide emissions and combustion performance of nontraditional ring-fired boilers with furnace geometries

• Published in: Journal of mechanical science and technology Vol. 29; no. 8; pp. 3489 - 3499
• Main Authors: Sung, Yonmo, Choi, Cheolyong, Moon, Cheoreon, Eom, Seongyong, Lee, Jong Jae, Kim, Byung Doo, Choi, Gyungmin, Kim, Duckjool
• Format: Journal Article
• Language: English
• Published: Seoul Korean Society of Mechanical Engineers 01.08.2015; Springer Nature B.V; 대한기계학회
• Subjects: Carbon; Combustion; Control; Dynamical Systems; Emission analysis; Engineering; Fuel consumption; Furnaces; Heat transfer; Industrial and Production Engineering; Mechanical Engineering; Nitrogen oxides; Vibration; Walls; 기계공학; NO; emission; Particle residence time; Coal combustion simulation; Ring fired boiler
• ISSN: 1738-494X; 1976-3824
• DOI: 10.1007/s12206-015-0747-0

The flow, combustion and emission characteristics of nontraditional ring-fired-type furnaces were investigated numerically to evaluate the effects of incorporating additional inner water walls on the heat transfer, carbon burnout and emissions of nitrogen oxides. Both tangentially and ring-fired-type furnaces were considered and the ring-fired-type furnaces were divided into four inner-water-wall cases: without, normal type, radiant expended type and both radiant and convective expended type. The presence of the inner water wall led to an improvement of approximately 50% in the heat flux. In particular, the reduction in nitrogen oxide emissions was approximately 30%, whereas the carbon burnout was kept constant.