Research Progress on the Characteristics of NOx Emission in Circulating Fluidized Bed Boiler

被引：0
|
作者：
Ke X. [1 ]
Zhang M. [1 ]
Yang H. [1 ]
Lyu J. [1 ]
Guo X. [2 ]
Li J. [2 ]
He H. [2 ]
机构：
[1] Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Haidian Distinct, Beijing
[2] Taiyuan Boiler Group Co. Ltd., Taiyuan
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2021年 / 41卷 / 08期
关键词：
Circulating fluidized bed; Influencing factors; Low-NO[!sub]x[!/sub] combustion; NO[!sub]x[!/sub; Research progress;
D O I：
10.13334/j.0258-8013.pcsee.201367
中图分类号：
学科分类号：
摘要：
The NOx emission of the circulating fluidized bed (CFB) boiler is not only affected by the fuel properties, but also closely related to the combustor performance and operation conditions. It is important to study the relationship between NOx emission and several design or operation parameters, which is also the key to realize the de-NOx combustion in engineering for a CFB boiler. Under a specific boiler load and for a selected fuel type, several engineering methods were proved to have significant effects on the reduction of NOx emission, such as improving the performance of circulating loop including improving cyclone efficiency, appropriately decreasing the size of feeding coal and limestone particles, adjusting the air staging and controlling the oxygen content in furnace, controlling the bed temperature and bed pressure drop in reasonable range, improving the uniformity of air and coal injection, etc., This paper reviewed the NOx formation and reduction mechanism under CFB combustion conditions, and summarized the effects of several design or operation parameters on the NOx emission. The principles of some main de-NOx combustion technologies were also analyzed. Finally, the key scientific issues and the future research directions related with NOx emission of CFB combustion technology were discussed. © 2021 Chin. Soc. for Elec. Eng.
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页码：2757 / 2770
页数：13
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共 106 条
  • [61] Ke Xiwei, Cai Runxia, Zhang Man, Et al., Application of ultra-low NO<sub>x</sub> emission control for CFB boilers based on theoretical analysis and industrial practices, Fuel Processing Technology, 181, pp. 252-258, (2018)
  • [62] HU Shanwei, Modification, extension and application of the EMMS model based on meso-scale structure, (2017)
  • [63] LI Jinghai, KWAUK M., Exploring complex systems in chemical engineering-the multi-scale methodology, Chemical Engineering Science, 58, 3-6, pp. 521-535, (2003)
  • [64] ZHANG Mingchuan, ZHANG Chu, Further integration of the type-A-choking-oriented unified model for fast fluidization dynamics, Powder Technology, 286, pp. 132-143, (2015)
  • [65] ZHANG Mingchuan, ZHANG Chu, A type-A-choking-oriented unified model for fast fluidization dynamics, Powder Technology, 241, pp. 126-141, (2013)
  • [66] VEPSALAINEN A, SHAH S, RITVANEN J, Et al., Bed Sherwood number in fluidised bed combustion by Eulerian CFD modelling, Chemical Engineering Science, 93, pp. 206-213, (2013)
  • [67] SCALA F., Mass transfer around freely moving active particles in the dense phase of a gas fluidized bed of inert particles, Chemical Engineering Science, 62, 16, pp. 4159-4176, (2007)
  • [68] HAYHURST A N, PARMAR M S., Measurement of the mass transfer coefficient and sherwood number for carbon spheres burning in a bubbling fluidized bed, Combustion and Flame, 130, 4, pp. 361-375, (2002)
  • [69] SIT S P, GRACE J R., Effect of bubble interaction on interphase mass transfer in gas fluidized beds, Chemical Engineering Science, 36, 2, pp. 327-335, (1981)
  • [70] RAJAN R R, WEN C Y., A comprehensive model for fluidized bed coal combustors, AIChE Journal, 26, 4, pp. 642-655, (1980)
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