摘要
利用程序升温热分析技术对不同混合比下油页岩半焦/玉米秸秆进行了热重燃烧试验,并对不同燃烧终温下的油页岩半焦进行了X射线衍射XRD（x-ray diffraction）试验。研究了汪清油页岩半焦与玉米秸秆在整个混烧过程中各燃烧组分的变化,考察了汪清油页岩半焦的矿物组分对其影响,采用基于固体分解动力学的TG（thermogravimetric）曲线模拟法得到了混样各阶段燃烧组分的变化曲线。结果表明汪清油页岩半焦矿物质的分解与聚合反应主要发生在873-1023 K;混样的主燃烧阶段包含4个阶段,玉米秸秆的掺入有效促进了混样中挥发分的析出燃烧,并促使矿物质碳酸盐的分解向低温区迁移,而反应级数的改变可以作为各阶段燃烧组分变化的表征。研究结果可为油页岩半焦燃烧的工业化利用提供理论技术支持。
Oil shale semicoke, the product of oil refining process at oil shale retorting, possesses more ash content and lower calorific value, and now is mainly treated by piling up. But due to some phenolic compounds, sulfides and polycyclic aromatics contained in the leachates, oil shale semicoke may cause severe damage to the environment at the piling-up process, which has been a bottleneck in the further development and utilization of oil shale, while utilizing the combustion of oil shale semicoke to produce heat is an effective use way. At this foundation the article further explored the utilization possibility of the combustion of oil shale semicoke and biomass. The thermogravimetric combustion experiment of oil shale semicoke and cornstalk blends was conducted with temperature programming thermoanalysis technology, which was to investigate the change of different combustion components of Wangqing oil shale semicoke and cornstalks during the whole co-combustion process. And the X-ray diffraction experiments of Wangqing oil shale semicoke at different burnout temperatures were conducted to explore the influence of the mineral on the combustion of oil shale semicoke. The change curves of the combustion component of Wangqing oil shale semicoke and cornstalk blends were acquired by the thermogravimetric curve simulation method based on the kinetics of solid-state decomposition. The results of X-ray diffraction experiments showed that the decomposition and polymerization reaction of the mineral of Wangqing oil shale semicoke mainly occurred at 873-1 023 K. The thermogravimetric combustion experiment of oil shale semicoke showed that the combustion process of the semicoke went through 4 stages, and the stage of volatiles emission burning went through 2 stages for the semicoke with high ash content, which was different from other oil shale semicokes. The 4 main stages of the combustion of Wangqing oil shale semicoke and cornstalk blends included volatiles emission burning, fixed carbon burning,residual fixed carbon burning
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2016年第10期226-231,共6页
Transactions of the Chinese Society of Agricultural Engineering
基金
吉林省科技发展计划项目(20130522067JH)
吉林市科技发展计划项目(201467005)
关键词
油页岩
生物质
燃烧
半焦
玉米秸秆
活化自由能
反应级数
oil shale
biomass
combustion
semicoke
cornstalks
free energy of activation
reaction order
