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华泽嘉,王擎. 油页岩气体热载体干馏炉炉内流动特性[J]. 科学技术与工程, 2020, 20(1): 271-278.
HUA ze-jia.Study on Flow Characteristics of Oil Shale Gas Thermal Carrier Dry Distillation Furnace[J].Science Technology and Engineering,2020,20(1):271-278.
油页岩气体热载体干馏炉炉内流动特性
Study on Flow Characteristics of Oil Shale Gas Thermal Carrier Dry Distillation Furnace
投稿时间:2019-05-14  修订日期:2019-10-14
DOI:
中文关键词:  油页岩  固定床  速度分布  压力分布
英文关键词:oil shale fixed bed velocity distribution pressure distribution
基金项目:
     
作者单位
华泽嘉 华北电力大学能源动力与机械工程学院
王擎 东北电力大学能源与动力工程学院
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中文摘要:
      对一台1t/d油页岩气体热载体干馏炉炉内流场特性进行了数值模拟。基于计算流体力学(CFD)的理论方法,采用以Ergun方程基础上建立的多孔介质模型、湍流模型进行研究。将模拟结果与前人研究成果进行对比分析,结果表明,采用添加阻力源项的多孔介质模型、RNG湍流模型等封闭模型能够较好的模拟炉内流场分布特性,并在原有结构基础上进行优化,增设同轴及偏心轴撞击流布气方式。在本文提出的布气方式下,无论采用同轴亦或是偏心轴布置,均能形成良好的速度场及压力场,提高干馏段气体混合程度,拓宽布气范围,增加气体与固体颗粒之间的接触面积和时间,强化换热进而确保干馏效果。模拟结果可为开发大容量气体热载体干馏炉及优化设计提供理论依据。
英文摘要:
      The flow field characteristics in a 1t/d oil shale gas heat carrier dry distillation furnace were numerically simulated. Based on the computational fluid dynamics (CFD) theory method, the porous medium model and turbulence model based on the Ergun equation are used for research. The simulation results are compared with the previous research results. It shows that the closed model, such as porous media model with added resistance source term and RNG k-ε turbulence model, can better simulate the flow field distribution characteristics in the furnace and optimize it based on the original structure, and add coaxial and eccentric shaft impact flow air distribution. In the air distribution mode proposed in this paper, a good velocity field and pressure field can be formed by using either coaxial or eccentric axis arrangement. So as to improve the gas mixing degree in the dry distillation section, widen the range of the gas distribution, increase the contact area and time between the gas solid particles, strengthen the heat exchange and ensure the dry distillation effect. The simulation results can provide a theoretical basis for the development of large-capacity gas heat carrier dry distillation furnace and optimization design.
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