Coal Ash Deposit Normal Spectral Emissivity Measurement

Yizhan CHAI; Zhen YANG; Yuanyuan DUAN

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

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Coal Ash Deposit Normal Spectral Emissivity Measurement

Energy Clean and Efficient Utilization in Coal-fired Power Systems | 更新时间：2025-07-04

- Coal Ash Deposit Normal Spectral Emissivity Measurement
- Power Generation Technology Vol. 40, Issue 4, Pages: 323-328(2019)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
  
  National Key Research Development Program of China(2015CB251502)
- DOI：10.12096/j.2096-4528.pgt.19070
  CLC：
- Received：06 May 2019，
  
  Published：31 August 2019
- 稿件说明：
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Yizhan CHAI, Zhen YANG, Yuanyuan DUAN. Coal Ash Deposit Normal Spectral Emissivity Measurement[J]. Power Generation Technology, 2019, 40(4): 323-328.
DOI：

Yizhan CHAI, Zhen YANG, Yuanyuan DUAN. Coal Ash Deposit Normal Spectral Emissivity Measurement[J]. Power Generation Technology, 2019, 40(4): 323-328. DOI： 10.12096/j.2096-4528.pgt.19070.

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Fe

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。

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 Fe

content increases

the spectral emissivity of the overall artificial ash sample rises in the full spectrum.

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