LIU Daofeng1,2, LI Shiyuan1,2,3, LIU Wen1,2, LIU Jingzhang1,2, OUYANG Ziqu1,2
(1. School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China;2. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;3. Dalian National Laboratory for Clean Energy Chinese Academy of Sciences, Dalian 116023, China)
Abstract: Pulverized coal preheated combustion, was on a 30 kW pulverized coal preheated combustion test rig to explore the characteristics of combustion and NOx emissions according to different air distribution modes and momentums in reduction zones. It is shown that, with the gas momentums in the reduction zone are gradually increased, the combustion efficiency increases first and then decreases, while the NOx emission decreases first and then increases. Different direct jet flows have great influence on NOx emission. When using 30 ° angle of oblique flow, the combustion temperature is higher than using direct flow around 100 ℃. The NOx emission is 152.3 mg/m3(6%O2)when using 30 ° angle of oblique flow, while using direct jet flow, NOx emission can get 99.7 mg/m3(6%O2).
Keywords: preheated combustion; NOx emission; low volatile carbon-based fuel; different air distribution modes
中图分类号：TK01 文献标志码：A
收稿日期： 2019-03-14， 修回日期：2019-04-05，在线出版时间：2019-06-20 16:11。
基金项目：国家重点研发计划项目，编号：2017YFB0602001；中国科学院战略性先导科技专项变革性洁净能源关键技术与示范，编号：XDA21040100。
第一作者简介：刘道烽(1992—)，男，硕士研究生，研究方向为固体燃料燃烧技术。E-mail：liudaofeng@iet.cn。
通信作者简介：李诗媛(1979—)，女，博士，研究员，博士生导师，研究方向为煤及替代燃料循环流化床燃烧技术、污染物控制技术。
E-mail：lishiyuan@iet.cn。
文章编号：1008-5548(2019)05-0008-09
DOI:10.13732/j.issn.1008-5548.2019.05.002
