WU Sheng;ZHANG Zhiqiang;LI Zhibing;WANG Xiaowei;LIU Man;

• 1:China energy science and technology research institute Co.
• 2:Ltd
• 3:Shanxi Institute of Coal Chemistry Chinese Academy of Sciences

Abstract：

In response to the problems of large bed temperature deviation, high combustible content of fly ash and large slag, and high power consumption of auxiliary equipment during the operation of a 300 MW fluidized bed boiler in a power plant, combustion optimization adjustment tests were conducted from the aspects of fuel particle size, operating oxygen content, primary air volume, secondary air distribution method, and operating bed pressure.The experimental results show that the main factors affecting the bed temperature deviation are fuel particle size, operating oxygen content, air chamber pressure, and the ratio of upper and lower secondary air, which have a significant impact on the combustible content of boiler fly ash and large slag. It is recommended to maintain an oxygen content of around 2.95% on the dial during operation under a load of 300 MW,and to use a 70%/70%/100%/100% positive tower air distribution method for the opening of the upper and lower secondary air valves. The air chamber pressure should be operated at around 12.5 kPa. The research results can provide guidance for optimizing the operation of similar units.

Key Words： fluidized bed boiler;combustion adjustment;fuel particle size;operating oxygen level;secondary air distribution;wind chamber pressure

Abstract:

Keywords:

Foundation: 国家自然科学基金项目(51508281);; 国家重点研发项目(2020YFB0606302)

Authors: WU Sheng;ZHANG Zhiqiang;LI Zhibing;WANG Xiaowei;LIU Man;

DOI: 10.13226/j.issn.1006-6772.24022301

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