煤的热解毕业论文

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1、 第 页 I 摘要摘要 本文主要对陕北孙家岔低变质煤进行微波热解实验研究，考察了不通 任何气体、通入氮气、通入循环气三种情况下不同微波功率、反应时间时 所获产品的质量及成分变化规律，并对低变质煤强化热解过程进行了初步 分析。 研究结果表明：在低变质煤微波热解实验中，随着微波功率的增加， 热解温度也随之上升，气液相产物也随之上升；反应时间的增加会使气液 相产物增加，并且得到质量更好的热解尾气；通入不同的气体对低变质煤 微波热解所得焦油、兰炭及热解尾气质量有较大影响。当通入循环气时， 产生的轻质焦油含量高于不通气体下加热所产生的， 同时热解尾气中的H2、 CnHm、 CH4及 CO 含量都不同程度

2、地提高。总可燃气成分提高了 3.81%。 循环气强化热解煤可有效促进焦油轻质化，并优化热解尾气成分。 关键词关键词：煤热解；微波；热解气氛；循环气 第 页 II Abstract The paper was studied that Sunjiachas low rank coal in northern Shaanxi China was pyrolysised on microwave heating conditions by experimental study, The quality and composition of products obtained in northern

3、Shaanxi Chia turnout low rank coal microwave pyrolysis experimental study investigated the barrier of any gas, which leads to nitrogen, which leads to three cases of the circulating gas microwave power, reaction timevariation, and low rank coal to strengthen the process of pyrolysis conducted a prel

4、iminary analysis. The results show that: the experiment of microwave pyrolysis of low rank coal, with the increase of microwave power, the pyrolysis temperature rise, gas liquid products will also rise; gas liquid products of the reaction time increases will increase, and get better quality exhaust gas of the pyrolysis; different gases pass into the solution of the proceeds of tar, coke and pyrolytic exhaust have a greater impact on the quality of microwave heat on low rank coal. Into the circ