燃煤积灰法向光谱发射率的测量

doi:10.12096/j.2096-4528.pgt.19070

发电技术 ›› 2019, Vol. 40 ›› Issue (4): 323-328.DOI: 10.12096/j.2096-4528.pgt.19070

• 燃煤发电系统能源高效清洁利用 • 上一篇下一篇

燃煤积灰法向光谱发射率的测量

柴一占(),杨震*(),段远源

热科学与动力工程教育部重点实验室(清华大学), 北京市海淀区 100084

收稿日期:2019-05-06 出版日期:2019-08-31 发布日期:2019-09-04
通讯作者: 杨震
作者简介:柴一占(1991),男,博士研究生,主要研究方向为颗粒辐射换热, chaiyz14@mails.tsinghua.edu.cn
基金资助:
国家重点研发计划项目(2015CB251502)

Coal Ash Deposit Normal Spectral Emissivity Measurement

Yizhan CHAI(),Zhen YANG*(),Yuanyuan DUAN

Key Laboratory of Thermal Science and Power Engineering of Education Ministration(Tsinghua University), Haidian District, Beijing 100084, China

Received:2019-05-06 Published:2019-08-31 Online:2019-09-04
Contact: Zhen YANG
Supported by:
National Key Research Development Program of China(2015CB251502)

摘要/Abstract

摘要：

燃煤积灰是超超临界锅炉热量传递链上重要的一环，它的辐射特性对于准确描述热量在锅炉内的传递非常重要。基于傅里叶红外光谱仪（Fourier transform infrared spectroscopy，FTIR）建立了高温法向光谱发射率测量平台。平台测量波长范围3~14μm，温度范围373~873K，采用标准黑漆样片对平台的测量结果进行了校准，对人工积灰样品光谱发射率开展了实验测量。发现人工灰样发射率具有显著的光谱分布特性，在短波段较低而长波段较高；随着温度的上升，人工积灰光谱发射率逐渐上升；随着Fe₂O₃含量的上升，整体人工灰样的光谱发射率在全光谱范围内上升。

关键词: 燃煤积灰, 超超临界锅炉, 光谱发射率, 傅里叶红外光谱仪

Abstract:

Coal ash deposit is important to the heat transfer of ultra-supercritical boilers. Its radiation characteristics are very important for accurately describing the heat transfer in the boiler. Based on the Fourier transform infrared spectroscopy (FTIR), a high-temperature normal spectral emissivity measurement platform was established. The platform can measure radiation of 3-14μm wavelengths and 373-873K temperatures. The measurement results for the platform were calibrated with standard samples. The emissivity of artificial ash samples was measured. The artificial ash emissivity has a remarkable spectral distribution characteristic, which is lower in the short wavelength and higher in the long wavelength. As the temperature rises, the artificial ash spectral emissivity increases. As the Fe₂O₃ content increases, the spectral emissivity of the overall artificial ash sample rises in the full spectrum.

Key words: coal ash deposit, ultra-supercritical boilers, spectral emissivity, FTIR

柴一占,杨震,段远源. 燃煤积灰法向光谱发射率的测量[J]. 发电技术, 2019, 40(4): 323-328.

Yizhan CHAI,Zhen YANG,Yuanyuan DUAN. Coal Ash Deposit Normal Spectral Emissivity Measurement[J]. Power Generation Technology, 2019, 40(4): 323-328.

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燃煤积灰法向光谱发射率的测量

Coal Ash Deposit Normal Spectral Emissivity Measurement

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