Advanced SearchSearch Tips
A Numerical Study for Optimum Configuration of Pulverized Coal Nozzle to Prevent Uneven Distribution of Particle
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
A Numerical Study for Optimum Configuration of Pulverized Coal Nozzle to Prevent Uneven Distribution of Particle
Kim, Hyuk-Je; Song, Si-Hong; Park, Seok-Ho;
  PDF(new window)
Recently, according to increase in the requirement of electric power, a thermoelectric power plant equipped with pulverized coal combustion system is highly valued, because coal has abundant deposits and a low price compared with others. For efficient use of coal fuel, most of plant makers are studying to improve combustion performance and flame stability, and reduce pollutants emission. One of these studies is how to control the profile of particle injection and velocity dependant on coal nozzle configuration. Basically, nozzle which has mixed flow of gas and particle is required to have the balanced coal concentration at exit, but it is very difficult to obtain that by itself without help of other device. In this study, coal distribution and pressure drop in gas-solid flow are calculated by numerical method in nozzle with various shapes of venturi diffuser as a means to get even coal particle distribution. The tentative correlations of pressure drop and exit coal distribution are deduced as function of the height, length and reducing angle of venturi from the calculated results. When coal hurner nozzle is designed, these equations are very useful to optimize the shape of venturi which minimize uneven particle distribution and pressure drop within coal nozzle.
Pulverized Coal Burner;DPM;Particle Trajectory;Venturi Diffuser;
 Cited by
Oba, K., Kimoto, M., Ikeda, M., Tsuji, H., Makino, H. and Kiga, H., 1996, 'Improvement of Low Load Combustion Stability for the New Low NOx Pulverized Coal Burner,' 일본중앙전력연구소 보고서, Part 4

Abele, A. R., Kindt, G. S. and Payne, R., 1989, 'Field Evaluation of Low-Emission Coal Burner Technology on Utility Boilers,' 2nd Generation Low-NOx Boilers, Vol. 2

Tadahisa, M. and Shigeki, M., 1985, 'Low NOx Combustion Technology for Pulverized Coal Fuel,' Hitachi Review, Vol. 34, No. 5

Neti, S. and Mohamed, O. E. E., 1990, 'Numerical simulation of turbulent two-phase flows,' Int. J. of Heat and Fluid Flow, Vol. 11, No. 3 crossref(new window)

FLUENT Inc., 1996, 'FLUENT User's Guide (Release 4.4),' Vol. 2

Yook, W. S., Shin, Y. H., Lee, G. M. and Park, S. J., 1998, '발전용 미분기 Labyrinth Seal Plate에서의 Coal Leakage 감소를 위한 수치적 연구,' Fluent User Group Meeting

Park, S. H., 1993, 'Particle Transport and Deposition in High Temperature Gas-Particle Two-Phase Tube Flow with Thermal Radiation,' Ph.D. Thesis, KAIST

Zhou Lixing, 1992, 'Theory and Numerical Modeling of Turbulent Gas-Particle Flows and Combustion,' CRC PRESS INC, pp. 99-163

하만영, 1996, 'CFD code의 산업분야에서의 응용,' Fluent User Group Meeting

Kim, D. J. and Choi, Y. W., 1994, '균일 난류 유동장내에서 연료입자의 퍼짐에 관한 연구,' 대한기계학회논문집, 제18권, 제5호, pp. 1330-1337

Ikeda, M., Tsuji, H., Kimoto, M. and Makino, H., 1995, 'Improvement of Low Load Combustion Stability for New Low NOx Burner,' 일본중앙전력연구소 보고서, Part 1