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Title	The Experimental Study on Emission of Nitrogen Oxides in a 70,000 Btu/Hr Gas Fired Furnace
Creator	Ma, H. K.; Hsieh, D. M.
Publisher	Digitized by J. Willard Marriott Library, University of Utah
Date	1992
Spatial Coverage	presented at Cambridge, Massachusetts
Abstract	The experimental study is to investigate the control of thermal nitrogen oxides emissions from a 70,000 Btu/hr gas-fired test furnace. Tests, included changing axial or radial air flow rate, adding cooling water, and adding staged air were performed to characterize and optimize the fuel-rich burning zone and the fuel-lean burnout zone independently. Detailed measurements of O2, CO2, CO, NO and NOx were made at the fuel-rich burning zone and furnace exit. The influence of forming CO, NO and NOx was examined. Results indicated that adding staged air in the fuel-rich burning zone (75cm from burner) will reduce the maximum NO and NOx emissions. Adding cooling water in a right position may further lower the NO and NOx emissions. In addition, the least formation of thermal nitrogen oxides in the first stage fuel-rich burning zone will occur at the stoichiometric ratio's inverse value, (o1)^-1, 0.65 to 0.7.
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/s6st7sfx
Setname	uu_afrc
ID	12600
Reference URL	https://collections.lib.utah.edu/ark:/87278/s6st7sfx

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Title	Page 11
Format	application/pdf
OCR Text	Show 'I I ) (~ ) 0 I .. , .. , I .' ... 1.0 1.1 70~!~'~~*'~'~~I~~I~~I~~' 70 (~ ) 0 I ,or I.' ,.. ' .0 I. I I .t I.J 70~~'~~'~~'~~'~~'~~'~~7: 0 (~ )'1 , .. 0.1 ' .1 , . I I .t I.J 60 ~~'~~' ~~'~~' ~~'~~' ~60 ... SO ' ". I (~ ) ,.. 1.1 I . ~ , I I " , I I.' I 50 5S 50 4S 55 45 45 10 o • 60 -..-..-. 10 ~ 50 ~ SO (.) ... ~ 40 s:l.. 40 ~ 30 Co\ l 30 l) 20o~ 10 60 50 olD 30 20 e 0 o 10 40 3S 30 15 10 16 10 6 50 45 35 30 25 20 IS 10 5 ~ 0L...0......u...,6L...t..0.L.4,~0L4.0LL,~S~0u..3~0"':l0 ~3~S~0~ 4~OO~4~50~So ~ AXIAL AIR (L/min) 0,00 160 100 250 300 350 400 450 50~ AXIAL AIR (L/min) 0,00 160 100 250 300 350 400 450 SO~ AXIAL AIR (L/min) 10 Radial Air = 200 L/min Radial Air = 300 L/min Radial Air = 350 L/min (A) 75 em from burner, LID = 5.0 (~ ) .. I.r I.' •.• '.1 '0' ". ,., 70~~1~~1~~1~~1~~1~~'~~'70 80 80 ~ so E SO (,) ~ 4D ~ 40 ~ 30 C\l 30 C C,.) to c-.; 20 C 10 10 60 50 40 30 to 10 (~ ) .. I.e 0.' ,., ", ,., , .. 60~~I~~I~~I~~'~~I~'~~!~,0 55 50 45 40 35 30 25 20 15 10 5 S5 so 45 40 3S 30 Z6 to 16 10 5 ~oo ISO 200 lSO 300 3$0 400 4S0 6Q~ ~OO 160 100 150 300 350 400 450 60~ ~OO ISO 200 2S0 300 3S0 400 450 60S AXIAL AIR (L/min) AXIAL AIR (L/min) AXIAL AIR (L/min) Radial Air = 200 L/min Radial Air = 300 L/min Radial Air = 350 L/min (B) In the stack ( a-NO, 6 -NOx, ,,-CO, 0 -Ot I 0 -COz) 40 35 30 2S IS 10 10 6 5 • 0,00 140 100 250 300 350 400 450 so~ AXIAL AIR (L/min) Radial Air = 450 L/min ,.. ,., '0' 1(.1~ r",' t.4 t.I 50~'~~I~~'~'~~"~~I~~I~'~O~O~!~50 . 45 46 40 35 30 25 20 IS 10 10 5 . --. 6 ~OO 150 tOO 150 ' 300 350 400 460 60~ AXIAL AIR (L/min) Radial Air = 450 L/min Figure 7 The effects of inlet radial air rate on gas concentration profiles and equivQlence ratio at
Setname	uu_afrc
ID	12596
Reference URL	https://collections.lib.utah.edu/ark:/87278/s6st7sfx/12596