scholarly journals Determining the radiative properties of pulverized-coal particles from experiments. Final report

1992 ◽  
Author(s):  
M.P. Menguec
Keyword(s):  
Pulverized Coal ◽  
Radiative Properties ◽  
Final Report ◽  
Coal Particles

Determination of radiative properties of pulverized coal particles from experiments

Fuel ◽  
1994 ◽  
Vol 73 (4) ◽  
pp. 613-625 ◽  
Author(s):  
M.P. Mengüç ◽  
S. Manickavasagam ◽  
D.A. D'Sa
Keyword(s):  
Pulverized Coal ◽  
Radiative Properties ◽  
Coal Particles

Numerical Simulation on Improving NOx Reduction Efficiency of SNCR by Regulating the 3-D Temperature Field in a Furnace

2013 ◽  
Vol 807-809 ◽  
pp. 1505-1513 ◽  
Author(s):  
Amir A.B. Musa ◽  
Xiong Wei Zeng ◽  
Qing Yan Fang ◽  
Huai Chun Zhou
Keyword(s):  
Numerical Simulation ◽  
Temperature Field ◽  
Removal Efficiency ◽  
Pulverized Coal ◽  
Measuring System ◽  
Optimum Temperature ◽  
Utility Boiler ◽  
Coal Particles ◽  
Injection Zone ◽  
Reduction Efficiency

The optimum temperature within the reagent injection zone is between 900 and 1150°C for the NOX reduction by SNCR (selective non-catalytic reduction) in coal-fired utility boiler furnaces. As the load and the fuel property changes, the temperature within the reagent injection zone will bias from the optimum range, which will reduces significantly the de-NOX efficiency, and consequently the applicability of SNCR technology. An idea to improve the NOX reduction efficiency of SNCR by regulating the 3-D temperature field in a furnace is proposed in this paper. In order to study the new method, Computational fluid dynamics (CFD) model of a 200 MW multi-fuel tangentially fired boiler have been developed using Fluent 6.3.26 to investigate the three-fuel combustion system of coal, blast furnace gas (BFG), and coke oven gas (COG) with an eddy-dissipation model for simulating the gas-phase combustion, and to examine the NOX reduction by SNCR using urea-water solution. The current CFD models have been validated by the experimental data obtained from the boiler for case study. The results show that, with the improved coal and air feed method, average residence time of coal particles increases 0.3s, burnout degree of pulverized coal increases 2%, the average temperature at the furnace nose decreases 61K from 1496K to 1435K, the NO emission at the exit (without SNCR) decreases 58 ppm from 528 to 470 ppm, the SNCR NO removal efficiency increases 10% from 36.1 to 46.1%. The numerical simulation results show that this combustion adjustment method based on 3-D temperature field reconstruction measuring system in a 200 MW multi-fuel tangentially fired utility boiler co-firing pulverized coal with BFG and COG is timely and effective to maintain the temperature of reagent injection zone at optimum temperature range and high NOX removal efficiency of SNCR.

Comparison of Sieve Diameter and Stokes' Diameter Distributions for Pulverized Coal Particles

1981 ◽  
Vol 27 (1-2) ◽  
pp. 79-82 ◽  
Author(s):  
L. M. COHEN ◽  
M. R. DENISON ◽  
N. GAT ◽  
A. B. WITTE
Keyword(s):  
Pulverized Coal ◽  
Coal Particles ◽  
Diameter Distributions

Pyrolysis of Egyptian Maghara pulverized coal particles

1997 ◽  
Vol 50 (1) ◽  
pp. 1-17 ◽  
Author(s):  
Said M.A. Ibrahim
Keyword(s):  
Pulverized Coal ◽  
Coal Particles

Model To Evaluate Flame Propagation Velocity for Pulverized Coal Particles

2013 ◽  
Vol 27 (3) ◽  
pp. 1661-1667
Author(s):  
Masayuki Taniguchi
Keyword(s):  
Flame Propagation ◽  
Propagation Velocity ◽  
Pulverized Coal ◽  
Flame Propagation Velocity ◽  
Coal Particles

Ignition behaviors of pulverized coal particles in O2/N2 and O2/H2O mixtures in a drop tube furnace using flame monitoring techniques

2015 ◽  
Vol 35 (3) ◽  
pp. 3629-3636 ◽  
Author(s):  
Chun Zou ◽  
Lei Cai ◽  
Di Wu ◽  
Yang Liu ◽  
Siliang Liu ◽  
...  
Keyword(s):  
Pulverized Coal ◽  
Tube Furnace ◽  
Drop Tube ◽  
Monitoring Techniques ◽  
Drop Tube Furnace ◽  
Coal Particles ◽  
Flame Monitoring

scholarly journals Combustion behavior profiling of single pulverized coal particles in a drop tube furnace through high-speed imaging and image analysis

2017 ◽  
Vol 85 ◽  
pp. 322-330 ◽  
Author(s):  
Xiaojing Bai ◽  
Gang Lu ◽  
Tom Bennet ◽  
Archi Sarroza ◽  
Carol Eastwick ◽  
...  
Keyword(s):  
Image Analysis ◽  
High Speed ◽  
Pulverized Coal ◽  
Tube Furnace ◽  
Drop Tube ◽  
High Speed Imaging ◽  
Combustion Behavior ◽  
Drop Tube Furnace ◽  
Coal Particles ◽  
Behavior Profiling
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