【作者】 吕鹏梅； 王铁军； 常杰； 吴创之； 陈勇；

【Author】 Lv Pengmei, Wang Tiejun, Chang Jie, Wu Chuangzhi, Chen Yong Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, No.1 Energy Road Wushan, Mailbox No.1129, Guangzhou, 510640 P.R. China

【机构】 中国科学院广州能源研究所；

【摘要】 根据流化床反应器特点,结合生物质气化动力学反应机理,建立了生物质在流化床内气化的等温稳态、一维两相动力学模型。该模型可以预测沿流化床高度的反应气体分布,模型所做的主要假定如下:流化床分为气泡相和乳相,在气泡相和乳相内均存在化学反应,考虑2相内的轴向气体扩散;生物质热解过程瞬时完成;主要考虑焦碳以及CO、CO₂、H₂、H₂O、CH₄等在流化床内发生的8个主要化学反应。数学模型属于常微分方程组边值问题,利用数值计算软件Matlab7.0进行编程求解。以木粉为原料,将模型结果和实验结果进行了对比,模拟结果与试验数据符合良好,在一定程度上证明了模型的有效性和可靠性。更多还原

【Abstract】 Considering the feature of fluidized-bed reactor, combining the kinetic mechanism of biomass gasification, a steady-state, isothermal, one-dimensional and two phases mathematical model of biomass gasification kinetics in bubbling fluidized beds has been developed. The main assumptions are: two phases, a bubble and an emulsion phase, are considered; chemical reactions occur in both phases; axial gas dispersion in two phases is accounted; the pyrolysis of biomass is instantaneous; char and gas species CO, CO₂, H₂, H₂O, CH₄, et al. and 8 chemical reactions are included in the model. The mathematical model belongs to a typical Border Value Problem of Ordinary Differential Equations and its solution is solved by a Matlab program. Utilizing wood powder as the feedstock, the calculated data are compared with the experimental results, which shows a largely satisfactory agreement and then proves the effectiveness and reliability of this model.更多还原