循环流化床锅炉燃用混煤特性研究
Study on the Characteristics of Blended Coal in CFBB

DOI: 10.12677/CCE.2020.81002, PP. 5-11

Keywords: 混煤，循环流化床锅炉，燃料特性，燃烧特性，污染物析出特性
Blended Coal, CFBB, Fuel Characteristics, Combustion Characteristics, Pollutant Emission Characteristics

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Abstract:

本文在对混煤燃料特性进行分析的基础上，探讨了混煤的燃烧特性和硫、氮污染物的析出特性，并分析了不同因素的影响。研究表明，混煤的分析基水分、灰分、挥发分、硫含量和发热量都具有线性可加性，灰熔点不具有线性可加性；混煤的燃烧特性与掺烧煤种中性能好的单煤比例呈线性相关，但始终介于掺烧的单煤之间；混煤的SO₂析出量和析出率介于两组分单煤之间，随着温度和氧浓度的升高而增大，NO析出量随着含氮量高的煤占比提高而增大，在一定情况下，混煤的NO排放质量浓度呈现为单煤NO排放质量浓度的线性叠加。
Based on the analysis of the characteristics of blended coal, this article discusses the combustion characteristics and pollutant emission characteristics of it, and analyzes their influencing factors. The results show that the analytical basis moisture, ash, volatile, sulfur content and calorific value of the blended coal have linear additivity, ash melting point does not have linear additivity; The combustion characteristics of blended coal are linearly correlated with the proportion of single coal with good performance, but it is always between the blended single coal; The SO₂ precipitation and precipitation rate of the blended coal are between the blended single coal, and increases with the increase of temperature and oxygen concentration. The NO precipitation increases with the increase of the proportion of coal with high nitrogen content. Under certain conditions, the NO emission mass concentration of blended coal presents linear superposition of NO emission mass concentration of single coal.

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