Local particle velocity, size, and concentration measurements in an industrial-scale pulverized coal-fired boiler☆

Abstract Parametric, in situ, particle velocity, size, and number density measurements have been made in a full-scale, coal-burning power plant using an optical diagnostic technique. Available ports in the boiler allowed measurement at three locations above the burner level. Variable test parameters included furnace load, excess air, and burner tilt, using a medium volatile bituminous coal. Higher particle velocities were observed when the boiler was operated at maximum capacity due to increased air and coal flows. Port-to-port velocity variations were attributed to the rotational nature of the mean flow, changes in gas density with changing gas temperature, and the interaction of the flow with the boiler nose. Measured particle number density profiles were characterized by high values in the small particle size class (

[1]  W. Bachalo,et al.  Phase/Doppler Spray Analyzer For Simultaneous Measurements Of Drop Size And Velocity Distributions , 1984 .

[2]  D. Holve.  In Situ Measurements of Flyash Formation from Pulverized Coal , 1986 .

[3]  Gerard M. Faeth,et al.  Current status of droplet and liquid combustion , 1977 .

[4]  M. Pinar Mengüç,et al.  Radiation heat transfer in combustion systems , 1987 .

[5]  M. Pinar Mengüç,et al.  Effects of particulate concentrations on temperature and heat flux distributions in a pulverized‐coal fired furnace , 1989 .

[6]  N. Chigier,et al.  Combustion of droplets in sprays , 1974 .

[7]  N. Chigier,et al.  Dynamics of droplets in burning and isothermal kerosene sprays , 1974 .

[8]  Measurements and Calculations of Preheated and Unpreheated Confined Kerosene Spray Flames , 1984 .

[9]  D. Holve,et al.  Optical particle sizing for in situ measurements Part 1. , 1979, Applied optics.

[10]  K. Kuo.  Principles of combustion , 1986 .

[11]  G. Faeth.  Evaporation and combustion of sprays , 1983 .

[12]  Juan C. Lasheras,et al.  Particle dispersion in a turbulent, plane, free shear layer , 1989 .

[13]  R. J. Quann,et al.  A scanning electron microscopy study of the transformations of organically bound metals during lignite combustion , 1986 .

[14]  A. R. Jones.  A review of drop size measurement — the application of techniques to dense fuel sprays , 1977 .

[15]  Adel F. Sarofim,et al.  The Physical Transformation of the Mineral Matter in Pulverized Coal Under Simulated Combustion Conditions , 1977 .