Abstract Biomass combustion for heat and power generation is one of the best ways for substituting fossil fuels. It is necessary to develop in situ temperature and emissivity measurement technology for biomass volatile flame. In this study, combustion experiments on three biomass pellets of pine wood, rice husk and fir wood were carried out in a laboratory biomass burner at two A/F flowrates. A multi-wavelength radiation thermometry method was proposed to calculate temperature and wavelength-dependent emissivity based on Rayleigh approximation. The results showed that the temperature and emissivity of pine wood combustion were higher than those of rice husk and fir wood volatile flames. Though the emissivity of rice husk was less than that of fir wood, the temperature of rice husk combustion was higher than that of fir wood due to the latter's higher moisture content. The temperatures measured by the spectrometer system agreed well with the thermocouple data. The normalized emissivities of the three different biomass show the same trend, indicating the radiative properties of biomass volatile flames do not change with biomass species and combustion conditions.

中文翻译：

---

使用火焰发射光谱测量松木、稻壳和冷杉木燃烧的温度和发射率

摘要 生物质燃烧供热发电是替代化石燃料的最佳途径之一。有必要发展生物质挥发性火焰的原位温度和发射率测量技术。在本研究中，在实验室生物质燃烧器中以两种 A/F 流量对松木、稻壳和冷杉木三种生物质颗粒进行燃烧实验。提出了一种基于瑞利近似的多波长辐射测温方法来计算温度和波长相关的发射率。结果表明，松木燃烧的温度和发射率高于稻壳和杉木挥发火焰。虽然稻壳的辐射率低于杉木，但由于后者，稻壳燃烧的温度高于杉木。s 更高的水分含量。光谱仪系统测量的温度与热电偶数据非常吻合。三种不同生物质的归一化发射率表现出相同的趋势，表明生物质挥发性火焰的辐射特性不随生物质种类和燃烧条件而变化。