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Show - 9 - Thus mixing of fuel and combustion air IS suppressed in the primary combustion zone, and combustion progresses gently. Consequently very uniform combustion is obtained, self-recirculation of the flue gas is achieved, and NOx emission is considerably reduced. A regenerative burner system with this new type of Low-NOx burner was appl ied to a heavy forge furnace. NOx emission of the Low-NOx burner was under 50ppm corrected to 11% excess 02 , and the energy saving was 55%. It was confirmed that the Low-NOx burner meets Japanese environmental regulations. 6. REFERENCES Rich V. Lawrence (1989). Regenerative Burners In Reheat Furnace, Iron and Steel Engineer, Octobe r 1989, pp. 46 Shigeta Ei j i, Kanazawa Hitoshi, Koizumi Takeshi and Nagata Takahi ro (1991). Low-NOx Combustion Technique for High Temperature Fu rnace, AFRC/JFRC International Conference on Environmental Control of Combust i on Process, Hono I u I u, Hawa ii, Pape r tW, 28. Suzuki Tomio, Morimoto Kotaro et al. (1982). Development of High Efficiency Burners with Low-NOx Emission, Journal of the Institute of Energy, December 1982, pp212. Suzuki Tomio and Morimoto Kotaro (1984). Method and Apparatus for Combustion with a Minimum of NOx Emission, United States Patent 4,439, 131. Tada T., Akiyama T., Kawamoto M. and Kikukawa H. (1991) , Development of Regenerative Burner System for Padiant Tubes, AFRC/JFRC International Conference on Environmental Control of Combustion Process, Honolulu, Hawai i, Paper tW,31. |