【作者】 金会心； 李水娥； 吴复忠； 熊玉竹；

【Author】 Jin Huixin, Li Shuie, Wu Fuzhong~*, Xiong Yuzhu(Material Science and Metallurgy Engineering College of Guizhou University of Technology, Guiyang 550003, China

【机构】 贵州工业大学材料科学与冶金工程学院；

【摘要】 本文研究了生物质型煤在不同Ca/S比和不同生物质加入量下的燃烧特性,并进行了动力学分析。结果表明,固硫型煤的TG,DTG曲线变化趋势相似,都出现两个明显的失重峰:挥发分析出阶段和煤焦燃烧阶段。二般在310—320℃范围内挥发分析出达到最大,在520—530℃范围内,煤焦燃烧失重速率最大。由于固硫反应的增重和型煤燃烧的失重的相对变化。导致第二个失重峰变化比较平缓,且失重温度范围较宽。不同Ca/S比的样品试验结果相比,Ca/S=2样品的最大失重点温度要比Ca/S=1.5样品的最大失重点温度要低;同一Ca/S比下,随着生物质量的增加,相应失重峰的峰值增加,最终失重百分比增加。通过动力学分析,生物质型煤在固硫剂条件下的燃烧反应服从燃烧动力学的基本方程表征的规律,对于不同的温度阶段可用不同的一级反应来描述。更多还原

【Abstract】 Combustion characteristic of bio- briquette is studied in different Ca/S and biomass percent and kinetics is analyzed in the paper. The results show that TG and DTG curves of different briquette axe similar, two obvious weight loss peaks are observed respec-tively. So combustion of bio-briquette is divided into two main phases: devolatilization and char combustion. Devolatilization is the fastest in 310-320℃ and weight loss rate of char combustion is the most in 520-530℃. Because of weight gain of sulfur retention reaction and weight loss of briquette combustion, the second weight loss peak changes slowly and the range of weight loss temperature is bigger comparing with the fist weight- loss peak. The experimental results of different Ca/S sample show that the fastest weight loss temperature of Ca/S=2 sample is less than Ca/S sample: in same Ca/S, relative weight loss peak becomes higher and the end weight loss percent is increased with increasing biomass. Bio-briquette combustion in Ca/s submit o the basic kinetics rules and can be handled with the differ- ent first order reaction in different range of temperature.更多还原