Numerical Simulation of NOx Emission in a Rotary Kiln During Coal Combustion and Co-combustion of Coal and Natural Gas

2010 ◽  
Author(s):  
Jifei Yang ◽  
Shuxia Mei ◽  
Junlin Xie
Keyword(s):  
Numerical Simulation ◽  
Natural Gas ◽  
Rotary Kiln ◽  
Coal Combustion ◽  
Nox Emission

scholarly journals Numerical simulation on the emission of NOx from the combustion of natural gas in the sidewall burner

2021 ◽  
pp. 61-61
Author(s):  
Mingyu Wang ◽  
Jing Zhao ◽  
Feihong Guo ◽  
Lingli Zhu ◽  
Dekui Shen ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Natural Gas ◽  
Environmental Problem ◽  
Nox Emission ◽  
Mixing Rate ◽  
Fuel Gas ◽  
Industrial Facilities ◽  
Low Nox Emission ◽  
Dynamics Method

The NOx produced from industrial facilities is a serious environmental problem in China. In this work, the NOx emission from the combustion of natural gas in the sidewall burner was investigated by using computational fluid dynamics method. To achieve the low-NOx emission, the sidewall burner structure was optimized involving the width of the primary premixed gas outlet, the secondary fuel gas nozzles number and angular spacing. The mixing rate of fuel gas and air could be improved by increasing the width of primary premixed gas outlet, and the lowest NOx emission of 32.8 ppm was achieved at the width of 8 mm. The NOx emission was remarkably reduced with the increasing of nozzles number, where 28.33 ppm of NOx emission and 357.35 ppm of CO were obtained at 4 nozzles. The combustion performance and NOx emission was improved as well as NOx emission was reduced at the angular spacing of 55?, compared to that of 30?, 35?, 40?, 45?, 50? and 60?.

scholarly journals 3D pore-type digital rock modeling of natural gas hydrate for permafrost and numerical simulation of electrical properties

2018 ◽  
Vol 15 (1) ◽  
pp. 275-285 ◽  
Author(s):  
Huaimin Dong ◽  
Jianmeng Sun ◽  
Zhenzhou Lin ◽  
Hui Fang ◽  
Yafen Li ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Electrical Properties ◽  
Natural Gas ◽  
Gas Hydrate ◽  
Natural Gas Hydrate ◽  
Digital Rock

Application of Reburning for NOx Control to a Firetube Package Boiler

1985 ◽  
Vol 107 (3) ◽  
pp. 739-743 ◽  
Author(s):  
J. A. Mulholland ◽  
W. S. Lanier
Keyword(s):  
Natural Gas ◽  
Reaction Order ◽  
Nox Reduction ◽  
Process Variable ◽  
Nox Emission ◽  
Boiler Load ◽  
Second Stage ◽  
Primary Zone ◽  
Dominant Process ◽  
Nox Control

A 730 kW (2.5 × 106 Btu/hr) firetube package boiler was used to demonstrate the application of reburning for NOx emission control. An overall reduction of 50 percent from an uncontrolled NOx emission of 200 ppm was realized by diverting 15 percent of the total boiler load to a natural-gas-fired second stage burner. Tests indicate that the overall reaction order of destruction with respect to initial NOx is greater than one; thus, larger reductions can be expected from reburning applications to systems with higher initial NOx. Rich zone stoichiometry has been identified as the dominant process variable. Primary zone stoichiometry and rich zone residence time are parameters that can be adjusted to maximize NOx reduction. Reburning applied to firetube package boilers requires minimal facility modification. Natural gas would appear to be an ideal reburning fuel as nitrogen in the reburning fuel has been shown to inhibit NOx reduction.

scholarly journals Numerical Simulation of Turbine Expander in Natural Gas Pressure Energy Power Generation System

2021 ◽  
Vol 2005 (1) ◽  
pp. 012142
Author(s):  
Zhan Zhixing ◽  
Mao Yanqin ◽  
Wang Xiaoyue ◽  
Li Chaojie ◽  
Cai Liang
Keyword(s):  
Numerical Simulation ◽  
Power Generation ◽  
Natural Gas ◽  
Gas Pressure ◽  
Generation System ◽  
Power Generation System
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