基于内循环预热器的超低挥发分碳基燃料预热燃烧试验

华电技术 ›› 2020, Vol. 42 ›› Issue (10): 73-80.

基于内循环预热器的超低挥发分碳基燃料预热燃烧试验

1. 中国科学院工程热物理研究所，北京 100190；2. 中国科学院大学，北京 100049；3. 中国科学院洁净能源创新研究院，辽宁大连 116023

出版日期:2020-10-25

Experiment on preheating combustion of ultra-low volatile carbon-based fuel by an internal circulation preheater

1.Institute of Engineering Thermophysics，Chinese Academy of Sciences，Beijing 100190，China；2.University of Chinese
Academy of Sciences，Beijing 100049，China；3.Dalian National Laboratory for Clean Energy，Dalian 116023，China

Published:2020-10-25

摘要/Abstract

摘要： 基于预热燃烧技术，提出了一种适合于细粉燃料稳定预热的内循环预热器，以期实现超低挥发分碳基燃料
的清洁高效利用。先后在内循环预热器冷态试验台、2 MW 内循环预热燃烧中试平台，以及 16 MW 预热式燃烧器测
试平台研究了内循环预热器的运行特性，并且对超低挥发分碳基燃料的预热、燃烧和 NOx 排放特性进行了系统研
究。试验结果表明，内循环预热器在流化风速为 1.50~2.25 m/s 范围内进出物料平衡，能够建立稳定循环。内循环
预热器实现了稳定的预热过程，将燃料稳定、持续地预热到 850 ℃以上，满足预热燃烧工艺的要求。高温气体燃料
主要包括 N2，H2，CO，CH4 和 CO2。燃料中 57.08% 的氮元素在内循环预热器内被释放。经检测分析，燃烧效率高于
97%，NOx排放质量浓度降低到 112.7 mg/m（3@6% O2）。

关键词: 内循环预热器, 预热燃烧, 超低挥发分碳基燃料, NOx排放

Abstract: On the basis of preheating combustion technology，an internal circulating preheater for the stable combustion of
fine powdered fuel was proposed，which was aimed at the clean and efficient utilization of ultra-low volatile carbon-based
fuel.The operating characteristics of the internal circulating preheater was investigated on an internal circulating preheater
cold test rig，a 2 MW internal circulating preheating combustion pilot test rig and a 16 MW preheater testing platform
successively.Also，the characteristics of preheating，combustion and NOx emission of ultra-low volatile carbon-based fuel
were discussed.The results showed that the material balance and a stable circulation could be established in the internal
circulating preheater when fluidizing air velocity was in the range of 1.50—2.25 m/s. A stable preheating process was
realized by preheating the fuel in the internal circulating preheater steadily and continuously to 850 ℃ and above，thereby
meeting the requirement of the preheating combustion process.The high-temperature gas fuel mainly included N2，H2，CO，
CH4 and CO2. And 57.08% of nitrogen element was released in the internal circulating preheater. Proven by testing，the
combustion efficiency was higher than 97%，and NOx emission reduced to 112.7 mg/m（3@6% O2）.

Key words: internal circulating preheater, preheating combustion, ultra-low volatile carbon-based fuel, NOx emission

宋文浩, 李诗媛, 欧阳子区, 刘敬樟 . 基于内循环预热器的超低挥发分碳基燃料预热燃烧试验[J]. 华电技术, 2020, 42(10): 73-80.

SONG Wenhao, LI Shiyuan, OUYANG Ziqu, LIU Jingzhang. Experiment on preheating combustion of ultra-low volatile carbon-based fuel by an internal circulation preheater[J]. Huadian Technology, 2020, 42(10): 73-80.

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