生物质燃烧特性与动力学分析

为丰富农林业生物质利用方式，通过热重分析法研究生物质在不同条件下的燃烧特性及其动力学特性。研究表明，不同生物质燃烧特性明显不同。稻壳经不同温度水洗后综合燃烧特性指数增加，最大燃烧速率提高6.0~7.6 %/min，燃烧活化能高于原样，且在一定范围内水洗温度越高，焦炭燃烧阶段活化能越小；提高升温速率，生物质的着火温度、燃尽温度、残余率、最大燃烧速率及综合燃烧特性指数提高；生物质的燃烧反应遵循一级反应动力学模型，相关系数达0.955以上，挥发分析出燃烧阶段活化能均大于焦炭燃烧阶段。该实验结果可为生物质在火力发电行业应用提供参考。

Combustion Characteristics and Kinetics Analysis of Biomass

In order to enrich the energy utilization of agricultural and forestry biomass waste, the combustion characters of biomass together with its kinetics characters were studied using thermogravimetric analysis. The experimental results show that the combustion characteristic parameters of different kinds of biomass had obvious difference.The comprehensive combustion characteristic index of rice husk after washing at different temperatures increases and the maximum combustion rate increases by 6.0~7.6%/min. At the same time, the activation energy of rice husk in combustion phase is higher than that of the original sample. The higher the washing temperature in a certain range, the smaller the activation energy of the fixed carbon combustion stage. With the increase of heating rate, the ignition and burnout temperature, residual rate, the maximum combustion rate and the integrated combustion characteristic index of the biomass improves. The combustion of biomass follows the first order reaction kinetics model and the correlation coefficients of the fitting curves are greater than 0.955. And the activation energy of the volatile component combustion stage are higher than fixed carbon combustion stage. The experimental results can provide reference for the application of biomass in the thermal power generation industry.