农林废弃物热解的试验研究

Experiment Study on Biomass Pyrolysis of Agricultural and Wood Wastes

介绍了用于生物质热解的试验装置及试验方法，研究了温度、加热速率等因素对木屑、稻壳等农林废弃物生物质热解产物的产率及其质量的影响。试验结果表明，两种不同生物质热解产物得率的变化规律基本一致。热解温度控制在４００～５００℃时，热解油产率最大。热解温度越高，则炭产量越少；温度大于５００℃时，热解气为中等热值可燃气，其热值大于１０ＭＪ／ｍ３。测试结果还表明。

This paper describes experimental facility and testing methods for the biomass pyrolysis. The effects of temperature and heating rate on the yields and characterization of pyrolysis products have been studied on the basis of the pyrolysis of two typical biomass from agricultural and wood wastes, sawdust and rice hull. The experimental results showed that the regular changes of yields distribution of pyrolysis products from the different types of biomass are similar on the same condition. The significant amount of liquid product can be obtained at the temperature between 400 and 500 ℃.The yields of charcoal reduces as the temperature increases. The pyrolysis gas is medium heating value fuel gas and its heating value is more than 10 MJ/m 3 as the temperature is more than 500 ℃. Also, the experimental results indicated that three stages of reaction corresponds to biomass pyrolysis process occurred on the conventional pyrolysis.