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当前位置: 首页 > 文章 > 油茶壳连续热解挥发物冷凝特性研究 农业机械学报 2015,46 (9) 206-210+143
Position: Home > Articles > Condensation Characteristic of Continuous Pyrolysis Volatiles of Oil-tea Camellia Shell Transactions of the Chinese Society for Agricultural Machinery 2015,46 (9) 206-210+143

油茶壳连续热解挥发物冷凝特性研究

作  者：
蒋恩臣;郭信辉;王明峰;张世军;李世博
单  位：
华南农业大学材料与能源学院
关键词：
油茶壳;连续热解;挥发物;换热系数;模型拟合
摘  要：
建立了适用于不同热解温度下的热解挥发物冷凝特性测试系统,对油茶壳400℃、500℃和600℃连续热解挥发物进行了冷凝特性研究。结果表明油茶壳挥发物的换热系数均随冷凝过程的增加而减小;在入口段中,400℃生物质挥发物的表面换热系数高于500℃和600℃的实验值,表明不凝气含量的增加减弱了挥发物的对流换热强度。用Nusselt、f因子模型进行模型拟合,f因子模型对模拟油茶壳500℃的热解挥发物的模拟效果较Nusselt好,误差值小于20 W/(m2·K),Nusselt模型不适用于挥发物模拟。基于实验值建立的指数衰减曲线方程能模拟400℃和500℃油茶壳挥发物冷凝特性,可为冷凝器设计提供换热系数计算的辅助分析。
译  名：
Condensation Characteristic of Continuous Pyrolysis Volatiles of Oil-tea Camellia Shell
作  者：
Jiang Enchen;Guo Xinhui;Wang Mingfeng;Zhang Shijun;Li Shibo;College of Materials and Energy,South China Agricultural University;
关键词：
Shell of oil-tea camellia Continuous pyrolysis Volatiles Heat transfer coefficient Model;;fitting
摘  要：
The mix volatiles of bio-oil steam and non-condensable gases need to be separated by condenser in the consecutive apparatus. Relevant researches about water steam condensational effect with air or N2 were carried out by researchers both at home and abroad. It showed that non-condensable gases can distinctly affect condensational process by reducing local heat transfer coefficient. A system of condensational testing tube was built for pyrolysis volatiles at different temperatures. Volatiles of oil-tea camellia produced at 400℃,500℃ and 600℃ were tested in this system. As a result,local heat transfer coefficients decreased with the increase of condensational process. The values of volatiles at 400℃ were higher than those at 500℃ and 600℃,which showed that the increase of non-condensable gases decreased the heat transfer intensity of volatiles. When experimental data were simulated in Nusselt theoretical model and f-factor model,the result showed that compared with the Nusselt theoretical model,f-factor model was more suitable for fitting experimental result of oil-tea camellia volatiles produced at500℃ with the error less than 20 W /( m2·K). Exponential decay equations can fit the experimental data of volatiles at 400℃ and 500℃,which brought an assistant reference for bio-oil condenser design in consecutive pyrolysis apparatus.

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