玉米秸秆致密成型燃料燃烧动力学分析  

Analysis on combustion kinetics of corn stalk briquetting densification fuel

作　　者：刘圣勇[1] 王艳玲[1] 白冰[1] 苏超杰[2] 杨国峰[1] 张飞[1] 

机构地区：[1]河南农业大学农业部可再生能源重点开放性实验室,郑州450002 [2]河南工业贸易职业学院,郑州450053

出　　处：《农业工程学报》2011年第9期287-292,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：郑州市重点科技攻关项目:082SGYG34150

摘　　要：为近一步实现秸秆致密成型燃料高效燃烧的合理利用,该文选用玉米秸秆致密成型燃料进行燃烧动力学分析,通过对玉米秸秆在不同粒度(1、0.25 mm)和不同升温速率(10、20、40℃/min)进行热重分析,采用一级反应动力学模型,得出不同实验水平下的热重、热重变化率及差热,利用热重和热重变化率计算出动力学参数——活化能和频率因子,最后得到玉米秸秆的热解动力学方程。研究表明:玉米秸秆致密成型燃料的燃烧过程大致可以分为燃料吸热失水反应、挥发分析出和燃烧反应及固定碳的燃烧反应3个阶段,升温速率和样品细度的变化对燃料的活化能及最大失重速率有一定影响,玉米秸秆致密成型燃料的活化能在升温速率为20℃/min时最大。该研究为进一步研究生物质成型燃料的实际热解过程分析以及燃烧设备的设计参数选择提供理论依据。To further realize biomass briquette fuel of high efficiency combustion, the dynamic analysis was performed for the corn stalk briquette. The corn straws in different sizes （1, 0.25 mm） and different heating rate （10, 20, 40℃/min） had been studied using thermogravimetric analysis, and then were treated by first order or pseudo-second order kinetics. Thermo gravimetry、digital thermogravimetry and differential thermal could be obtained. The kinetic parameters like activation energy and frequency factor could be calculated by using thermo gravimetry and digital thermogravimetry. Thermal decomposition kinetics equation of corn straws was obtained. The results showed that corn stalk briquette combustion process could be divided into three parts： endothermic and dehydration,precipitation of volatile and the combustion reaction,fixed carbon combustion reaction. Different rate of temperature and sample fineness had some influences on the activation energy and the maximum weight loss rate. The activation energy of cornstalk briquette reached maximum at heating rate of 20℃/min. The study could provide theoretical basis for further research on the actual pyrolysis process of biomass briquette fuel and determine design parameters of burning equipments.

关 键 词：秸秆 热解 热重分析 计算 玉米 动力学 

分 类 号：S216.2[农业科学—农业机械化工程] TK222[农业科学—农业工程]