scholarly journals Effect of Flow Field on NOx Emission Properties of Jet Nonpremixed Flames in Cylindrical Furnaces

2007 ◽  
Vol 2 (4) ◽  
pp. 730-739
Author(s):  
Susumu NODA ◽  
I Gede PARWATHA ◽  
Yuzuru NADA ◽  
Shigenori NISHIO ◽  
Shingo FUKUSHIGE
Keyword(s):  
Flow Field ◽  
Nox Emission ◽  
Nonpremixed Flames ◽  
Emission Properties ◽  
Jet Nonpremixed Flames

Effects of Flow Field on Combustion Characteristics of Confined Jet Nonpremixed Flames

2007 ◽  
Author(s):  
Susumu Noda ◽  
Yuzuru Nada ◽  
I. Gede Parwatha ◽  
Shingo Fukushige
Keyword(s):  
Flow Characteristics ◽  
Flow Fields ◽  
Nonpremixed Flames ◽  
Air Velocity ◽  
Velocity Difference ◽  
Flame Stretch ◽  
Inner Diameter ◽  
Jet Nonpremixed Flames ◽  
Cylindrical Furnace ◽  
Emission Index

Confined flames are widely used in the industrial field. The flame characteristics can be strongly dominated by the combination of a burner and furnace geometries, which were not paid much attention before. In the present study, flow fields in confined flames are discussed in terms of the flame characteristics. The flow characteristics of confined flames have been investigated for propane nonpremixed flames in cylindrical furnaces. The effects of the inner diameter of the cylindrical furnace D1, the turbulence at the flame boundary, and the global equivalence ratio φ are examined in terms of the relation between the emission of NOx and the flow fields. The emission index of NOx, EINOx, decreases roughly with these parameters. The decrease in EINOx is thought to be related to the dilution of mixtures by the burned gas and the flame stretch. The dilution is attributable to vortices formed at the bottom of the furnace, and the flame stretch is attributable to the air velocity difference ΔUa created by two air nozzles. In the present study, it was found that the increases in D1, ΔUa, and φ enlarge and strengthen recirculation vortices to dilute the flame.

E214 Radiation effect on NOx emission characteristics of confined nonpremixed flames

2011 ◽  
Vol 2011 (0) ◽  
pp. 309-310
Author(s):  
Susumu Noda ◽  
Yuzuru Nada ◽  
Shoichiro Oguri ◽  
Takahiro Ito
Keyword(s):  
Radiation Effect ◽  
Nox Emission ◽  
Emission Characteristics ◽  
Nonpremixed Flames

scholarly journals Flow Field Measurements of Methane-Oxygen Turbulent Nonpremixed Flames at High Pressure

2005 ◽  
Vol 31 (1) ◽  
pp. 45-56
Author(s):  
Kimio IINO ◽  
Hoshitaka KIKKAWA ◽  
Fumiteru AKAMATSU ◽  
Masashi KATSUKI
Keyword(s):  
High Pressure ◽  
Flow Field ◽  
Field Measurements ◽  
Nonpremixed Flames ◽  
Turbulent Nonpremixed

scholarly journals Optimization of NOx emission control based on high sulfur coal combustion

2021 ◽  
Vol 256 ◽  
pp. 02015
Author(s):  
Shuai Guo ◽  
Mingliang Zhao ◽  
Tingting Li ◽  
Zhiyu Song ◽  
Jiting han
Keyword(s):  
Wind Speed ◽  
Flow Field ◽  
Coal Combustion ◽  
Emission Reduction ◽  
Nox Emission ◽  
Test Results ◽  
Expected Effect ◽  
Injection Quantity ◽  
Adjustment Test ◽  
Ammonia Injection

Combined with the operation of an 800MW supercritical boiler burning high sulfur coal, in order to control the emission of nitrogen oxides, the optimization adjustment of ammonia injection and NOx emission reduction based on combustion adjustment is proposed. According to the test of the inlet and outlet of denitration system under 800 MW condition, the parameters of NOx, O2, NH3, wind speed and so on at the inlet and outlet of denitration system are tested, and the ammonia injection manual valve is adjusted according to the test results. After adjustment, the NOx distribution at the outlet of denitration system is uniform, and the ammonia injection quantity is reduced. After adjustment, the flow field under 800 MW and 500 MW conditions is tested, and the flow field distribution under the two conditions is uniform. The adjustment test has achieved the expected effect.

Flow field measurements of methane-oxygen turbulent nonpremixed flames under high pressure

2004 ◽  
Vol 2004 (0) ◽  
pp. 313-314 ◽  
Author(s):  
Kimio Iino ◽  
Hoshitaka Kikkawa ◽  
Fumiteru Akamatsu ◽  
Masashi Katsuki
Keyword(s):  
High Pressure ◽  
Flow Field ◽  
Field Measurements ◽  
Nonpremixed Flames ◽  
Turbulent Nonpremixed
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