桦甸油页岩热解过程中的破碎粉化特性
发布时间：2018-07-13 08:20
【摘要】：提出了描述破碎粉化程度的多粒径表征指标,利用自行设计的转鼓式热解反应器系统地研究了桦甸油页岩在不同热解条件下的破碎粉化特性,并对破碎机理进行了分析。结果表明,热力-机械力耦合加载的方式下,粉化率是两种作用力单独加载方式之和的3.96倍,说明两者产生了协同作用,其中热力作用是煤颗粒发生破碎的主要影响因素,其实质是颗粒内部孔隙结构的演变,机械外力作为外在因素,其作用是增强宏观破碎现象;相对破碎率和粉化率与孔隙结构的变化趋势相一致;入料粒度越小,整体破碎程度越小;含油率越高,破碎程度越大,中矿油页岩因方解石含量较高在热解过程中不易分解为细小颗粒,因此粉化率最低;破碎和粉化是两个相对独立的概念,两者之间不存在相关性。
[Abstract]:A multi-particle size index was proposed to describe the degree of pulverization of Huadian oil shale. The pulverization characteristics of Huadian oil shale under different pyrolysis conditions were systematically studied by using a self-designed rotary drum pyrolysis reactor, and the mechanism of fragmentation was analyzed. The results show that the pulverization rate is 3.96 times as much as the sum of the two separate loading modes under the thermal-mechanical-mechanical coupling loading mode, which indicates that there is a synergistic effect between the two, and the thermal effect is the main factor influencing the coal particle breakage. Its essence is the evolution of the pore structure inside the particle, the mechanical external force is the external factor, its function is to strengthen the macroscopic fracture phenomenon, the relative breakage rate and the pulverization rate are consistent with the change trend of the pore structure, the smaller the grain size is, the smaller the grain size is. The smaller the whole degree of fragmentation is, the higher the oil content is, the greater the degree of fragmentation is, and the higher the calcite content is, the lower the pulverization rate is, because calcite content is high in the process of pyrolysis, so the pulverization rate is the lowest; crushing and pulverizing are two relatively independent concepts. There is no correlation between the two.
【作者单位】： 煤炭科学技术研究院有限公司煤化工研究分院;煤炭资源高效开采与洁净利用国家重点实验室;
【基金】：国家重点基础研究发展计划项目(2014CB744302)~~
【分类号】：TE662
本文编号：2118757
[Abstract]:A multi-particle size index was proposed to describe the degree of pulverization of Huadian oil shale. The pulverization characteristics of Huadian oil shale under different pyrolysis conditions were systematically studied by using a self-designed rotary drum pyrolysis reactor, and the mechanism of fragmentation was analyzed. The results show that the pulverization rate is 3.96 times as much as the sum of the two separate loading modes under the thermal-mechanical-mechanical coupling loading mode, which indicates that there is a synergistic effect between the two, and the thermal effect is the main factor influencing the coal particle breakage. Its essence is the evolution of the pore structure inside the particle, the mechanical external force is the external factor, its function is to strengthen the macroscopic fracture phenomenon, the relative breakage rate and the pulverization rate are consistent with the change trend of the pore structure, the smaller the grain size is, the smaller the grain size is. The smaller the whole degree of fragmentation is, the higher the oil content is, the greater the degree of fragmentation is, and the higher the calcite content is, the lower the pulverization rate is, because calcite content is high in the process of pyrolysis, so the pulverization rate is the lowest; crushing and pulverizing are two relatively independent concepts. There is no correlation between the two.
【作者单位】： 煤炭科学技术研究院有限公司煤化工研究分院;煤炭资源高效开采与洁净利用国家重点实验室;
【基金】：国家重点基础研究发展计划项目(2014CB744302)~~
【分类号】：TE662
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1 关盛军;解决分子筛粉化及变黑问题[J];油气田地面工程;2003年06期
2 古家 宽之;张国富;;条型沥青粉化行为的模型化研究[J];燃料与化工;2008年04期
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