木屑颗粒燃料冷态压缩成型参数试验研究  

Experimental Study on the Molding Properties of Cold Compress Molding for Sawdust Pellet Fuel

作　　者：马爱纯[1] 陈宗威 欧俭平[1] 魏永春[1] 

机构地区：[1]中南大学能源科学与工程学院,长沙410083

出　　处：《新能源进展》2015年第1期7-13,共7页Advances in New and Renewable Energy

摘　　要：对杉木屑进行不同成型直径、含水率及压缩速度条件下的冷态压缩成型试验,分析多个影响因素对木屑成型试样的松弛密度、抗压强度及比能耗的影响.通过单因素影响试验分析表明,在含水率为16%和成型直径为10 -12 mm 时能获得较好的成型参数,压缩速度为40 mm/min 时,可获得较大的松弛密度和抗压强度,但比能耗相对较大.通过设计三因素三水平正交试验,运用多指标综合加权评分法对试验结果进行分析,权重系数综合考虑松弛密度、抗压强度和比能耗的重要与次要程度,结果表明：木屑最佳成型因素水平组合为成型直径10 mm、含水率16%、压缩速度40 mm/min,此时木屑试样松弛密度、抗压强度和比能耗分别为0.91 g/cm^3、315 N 和30.20 J/g,综合加权评分值最高.A cold compression molding experiment for the sawdust of cedarwood was conducted. The influences ofdifferent molding diameter, moisture content and compression speed on the relaxation density, compressive strength andenergy consumption per unit mass of the molded samples were analyzed. It shows that the three molding properties arereasonable when the moisture content is 16% and the molding diameter is 10 - 12 mm. When the compression speed is 40mm/min, large relaxation density and compressive strength can be obtained, though the energy consumption per unit massis relatively higher. An orthogonal experiment of 3 factors with 3 levels was conducted. The multi-index synthetic weightedmark method is adopted to analyze the experimental results, in which the weight coefficients are determined according tothe significance. It shows that the optimal scheme is as followed： molding diameter of 10 mm, moisture content of 16%and compression speed of 40 mm/min, while the relaxation density, compressive strength and energy consumption per unitmass of the product are 0.91 g/cm^3, 315 N and 30.20 J/g respectively and the synthetic weighted mark is the highest.

关 键 词：杉木屑 压缩成型 松弛密度 抗压强度 比能耗 正交试验 

分 类 号：TK6[动力工程及工程热物理—生物能] S216.2[农业科学—农业机械化工程]