摘要
采用热分析法对煤热分解特性进行了热重分析研究,探讨了粒径和升温速率对煤热解失重过程的影响。研究指出,当粒径小于0.25mm时,磨煤过程中煤岩组分富集对热解的影响会大于传热传质对热解的影响。根据试验数据建立了热解动力学模型,分别用积分法和微分法对热解动力学参数求解,得到煤的热解反应级数为3,热解反应动力学参数的计算结果能真实地反映煤的热解情况。
The thermogravimetric analysis study on pyrolysis character of coal has been carried out by using the thermal analysis method, the influence of particle size and temperature rise rate upon the weight loss process in coal pyrolysis being approached, pointing out the influence of coal petrologic components’ enrichment during coal pulverizing process upon pyrolysis of coal is larger than that of heat transfer and mass transfer if the particle size to be smaller than 0.25 mm. Based on the test data, a model of pyrolysis dynamics model has been established, the integration and differentiation methods are respectively used to find the solutions of pyrolysis dynamics parameters. The stage number of coal pyrolysis reaction obtained to be 3, the calculated result of pyrolysis reaction dynamics parameters can really reflect the pyrolysis state of coal.
出处
《热力发电》
CAS
北大核心
2006年第4期17-20,共4页
Thermal Power Generation
关键词
煤
热解
热重分析
升温速率
粒径
动力学
coal
pyrolysis
thermogravimetric analysis
temperature rise rate
particle size
dynamics
