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Title	Development of New Type Gas Burner for Radiant Tube
Creator	Sato, Kuniaki; Muto, Shinichiro; Futagami, Nobuhiro; Yanagishima, Fumiya; Shimoyama, Yuzi
Publisher	Digitized by J. Willard Marriott Library, University of Utah
Date	1984
Spatial Coverage	Tulsa, Oklahoma
Abstract	Many furnaces which perform heat treatment in the reducing or non-oxidizing atmosphere employ an indirect heating method. When gas fuel is burnt in the radiant tube in general, high-load combustion in a limited space is required, and burners using ordinary radiant tubes had the following defects: (1) High emission of NO in exhaust gas (2) Loud combustion noise in the limited space (3) Uneven combustion is caused in the length direction of the radiant tube, thereby reducing the tube life. (4) Poor mixing of the fuel gas with combustion air prevents low-air-ratio combustion. (5) Stabilized flame formation is difficult, preventing stabilized combustion at low turn-down. To overcome these defects of ordinary burners, Chiba Works, Kawasaki Steel Corporation developed a new-type radiant-tube-using burner, which is now actually used by many furnaces for burning fuel gases ranging from highcalory gases (LPG and LNG) to low calory gases (such as a mixed gas of coke oven gas and blast furnace gas). This paper reports the outline of the newly-developed burner (KS-2 Burner) and its combustion characteristics.
Type	Text
Format	application/pdf
Language	eng
Rights	This material may be protected by copyright. Permission required for use in any form. For further information please contact the American Flame Research Committee.
Conversion Specifications	Original scanned with Canon EOS-1Ds Mark II, 16.7 megapixel digital camera and saved as 400 ppi uncompressed TIFF, 16 bit depth.
Scanning Technician	Cliodhna Davis
ARK	ark:/87278/s62b91jk
Setname	uu_afrc
ID	1591
Reference URL	https://collections.lib.utah.edu/ark:/87278/s62b91jk

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Title	Page 8
Format	application/pdf
OCR Text	Show decreases. When Ai(%) is changed, NO emission and combustibility show excellent correspondence. Within the Ai(%) range of low NO emission, soft reddish-purple flames are formed in both the circumferential and longitudinal directions of the radiant tube, resulting in the smooth secondary combustion. In other Ai(%) ranges, the primary or secondary combustion forms sharp blue flames. 4.2 Influence of Number of Gas Nozzle Holes The number of gas nozzle holes was changed to see changes in combustion in the circumferential direction. The result indicated that the number of gas nozzle holes exercised a significant influence on NO emission. For 3 x the four-hole nozzle, soft reddish purple flames uniform in the circumferential direction were formed, whereas for the two-hole nozzle, air-rich blue flames were mixed with gas-rich red flames at the primary combustion zone, causing high NO emission. For the eight-hole nozzle, the primary combustion zone formed sharp blue flames, also causing high NO emission. 1.9.7
Setname	uu_afrc
ID	1571
Reference URL	https://collections.lib.utah.edu/ark:/87278/s62b91jk/1571