Study on Velocity Variation of Primary Air in Power Plants

Abstract:

Uniform velocity of primary air is very important in the operation of utility boilers. Regulation of the resistance of each pipe was done without pulverized coal to achieve equal flow velocity. The mass flow rate of pulverized coal and the length difference of pipes would lead to velocity variation of primary air. By the research of primary air flow and the regulation process, model of the velocity variation was built to calculate the velocity of each pipe and their difference. The arrangement of pipes and the operation parameters were taken into consideration. With the experimental data, calculation of velocity under different states was made. The velocity difference of different pipes was estimated. The length difference between pipes and the variation of the mass flow rate of pulverized coal play the most important role that affects the velocity of primary air.

• Periodical: Applied Mechanics and Materials (Volumes 341-342)
• Pages: 1342-1345
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.341-342.1342
• Online since: July 2013
• Authors: Xing Sen Yang, Jing Yin
• Keywords: Primary Air, Pulverized Coal, Uniformity, Velocity

References

[1] Pan Weiguo, Cao Jiangmin: Study on Dynamic Method of Primay Air Piping Resistance of Utulity Boilers. China Electricpower. 1999; Vol. 32(1999), pp.28-30.

[2] Xingsen Yang, Jing Yin: Research on Equal Flow Distribution of Pulverized Coal-Air Mixture in Parallel Pipeline. Applied Mechanics and Materials. 2013; Vol. 252(2013), pp.259-262.

DOI: 10.4028/www.scientific.net/amm.252.259

[3] Yu Rongxian, Wang Wenqi: Engineering Fluid Dynamics (South East University Press, 1994).

[4] Huang Biao: Pneumatic conveying (Shanghai Science and Technology Press, 1984).

[5] Wang Wenqi: Two Phase Flow (Hydro & Electric Power Press, Beijing 1989).