昭通褐煤热解特性的研究

针对昭通褐煤进行热解实验研究,得到了升温速率和热解温度对褐煤热解煤气成分、煤气热值和产气率的影响规律。结果表明:随着热解温度的升高,煤气中的CO2含量明显减少,H2和CO的含量逐渐增多,CH4的含量先增加后减少,煤气热值和煤气产率提高;同热解温度下,随着升温速率提高,煤气中的CO2含量逐渐减少,CO含量逐渐增多,CH4含量逐渐减少,对H2含量的影响不大,热解煤气热值和产量均有所增多,增加幅度都是由大变小。实验阶段获得的最高热值工艺条件为:热解温度是650℃,升温速率是15℃/min,煤气低热值为9.27 MJ/m3。

STUDY ON PYROLYSIS CHARACTER OF LIGNITE IN ZHAOTONG

Accroding to the pyrolysis experimental study of Zhaotong Lignite,the effecting regulation between temperature and increasing rate to lignite pyrolysis gas composition,gas heating value and yield of gas is obtained.The results show that CO2 content of gas reduces dramatically with the increasing of pyrolysis temperature,and content of CO and H2 increasing gradually,the content of CH4 decreasing after increasing for a while,and the gas heating value and the gas yield increasing accordingly.At the same temperature,with the rise of temperature increasing,the contents of CO2 and CH4 reducegradually,content of CO increases,and Gas heating value and yield of gas increase as well,and there is no big influence to the content of H2.In the test the process conditions of the maximum heating value obtained is as following: pyrolysis temperature 650℃,temperature increasing rate15℃/min and the low heating value is 9.27MJ/m3.