论文部分内容阅读
研究调查木薯淀粉和阿拉伯树胶粘合印楝木屑制成压块的特性.压块在千斤顶平均压力为10.7 kg·cm~(-2)制成.木屑与粘合剂的重量比分别为:100:15,100:25,100:35和100:45.测试压块的物理和燃烧特性.压块的物理和燃烧特性的变化随粘合剂的种类和粘结剂的水平而变化(p<0.05).结果表明:淀粉为粘合剂压制的木屑压块有较好的性能、密度、耐用性、热值、固碳百分率、低灰和低挥发物分别为0.546 g·cm~(-3)、95.93%、33.09 MJ·kg~(-1)、84.70%、3.35%和11.95%;而阿拉伯树胶为粘合剂压制的木屑压块的密度、耐用性、热值、固碳百分率、低灰和低挥发物分别为0.425 g·cm~(-3)、94.85%、32.76 MJ·kg~(-1)、87.30%、4.45%和8.75%.研制压块是为了得到良好的燃料,当木屑与淀粉和阿拉伯树胶为粘合剂的比例分别为100:25和100:35,能得到最佳木屑压块.“,”The study was undertaken to investigate the properties of cassava starch and gum arabic bonded briquettes from the sawdust of Azadirachta indica. The briquettes were produced using a Jack press at an average pressure of 10.7 kg·cm~(-2). The sawdust and binders were mixed at ratios of 100:15, 100:25, 100:35 and 100:45 in weight, respectively. The briquettes produced were subjected to physical and combustion tests. Both the physical and combustion properties of the briquettes vary with binder types and binder levels (p < 0.05). The result shows that briquettes bonded with starch gave better performance based on density of 0.546 g·cm~(-3), durability rating of 95.93%, heating value of 33.09 MJ·kg~(-1), percentage of fixed carbon of 84.70% and low ash and volatile matter of 3.35% and 11.95%, respectively, while briquette bonded with gum arabic has density of 0.425 g·cm~(-3), durability rating of 94.85%, heating value of 32.76 MJ·kg~(-1), percentage of fixed carbon of 87.30% and low ash and volatile matter of 4.45% and 8.75, respectively. Since the aim of briquetting is to produce briquette that will serve as a good source of fuel and support combustion, the best briquette was produced when the sawdust-starch ratio and sawdust-gum arabic ratio was 100:25 and 100:35, respectively.