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| 1 | Motion behavior of particles in air-solid magnetically stabilized fluidized beds for separation显示文摘In order to study the settling mechanism of particles in an air-solid magnetically stabilized fluidized bed(MSFB) for separation,we carried out free settling and quasi-zero settling tests on the tracing particles.The results show that the main resistance forces as the tracing particles settled in an air-solid MSFB were motion resistance force and yield force.The motion resistance and yield forces greatly hindered the free settling of the particles by greatly decreasing the acceleration for settling process of the particles.The acceleration decreased from 3022.62 cm/s 2 to zero in 0.1 s,and in the end,the particles stopped in the air-solid MSFB.The yield force on particles increased with increasing the magnetic field intensity,resulting in decrease of the quasi-zero settling displacement.However,the yield force on particles decreased with increasing the fluidized air velocity,leading to increase of the quasi-zero settling displacement.When the structure and operating parameters of the air-solid MSFB were set up,the yield stress on particles stopped in an air-solid MSFB was a function of diameter and density of particles.The settling displacements of equal diameter particles increased with increasing their densities,and the settling displacements of equal density particles increased with increasing their diameters. | Song Shulei a,,Zhao Yuemin a,Luo Zhenfu a,Tang Ligang b a School of Chemical Engineering and Technology,China University of Mining & Technology,Xuzhou 221116,China b Coal Mining and Designing Department,Tiandi Science & Technology Company Co.Ltd.,Beijing 100013,China | 2012 | International Journal of Mining Science and Technology2012，22，5： | 13 |
| 2 | 煤化工过程的主要污染物及其控制显示文摘介绍了煤化工过程产生的主要污染物及其排放特征,综述了当前各类污染物的控制方法 ,特别是焦化废水的处理方法,提出了新的工艺集成思路。新的煤化工发展应降低能耗并减少环境污染,污染控制工艺应更加生态化,降低二次污染。 | 王秀军 | 2012 | 煤化工2012，40，5： | 11 |
| 3 | 磁稳流化床研究与应用进展显示文摘磁稳流化床(MSFB)作为一种新型反应器,兼具固定床和流化床的众多优点,具有巨大的应用前景。本文综述了MSFB近年来在基础研究和应用上取得的进展。基础研究方面主要介绍了磁场强度和液相流速对床层结构的影响,以及床层空隙率、操作稳定性和传递特性等研究情况;应用方面介绍了MSFB在生物化工、能源和环境工程等领域的应用。最后分析了MSFB目前存在的不足,如对于一定的反应体系未找到相应合适的磁性催化剂、操作温度高于磁性载体的居里温度时,MSFB将无法操作、磁场发生装置释放出大量的热量对磁性载体和反应过程产生影响、难以确定稳定操作区域。并指出其今后的主要研究方向为磁性载体催化剂的研究与开发及对MSFB的稳定性判据、传热、传质、强化反应过程机理、反应器放大规律、工业化应用装置设计等方面的研究。 | 林添明 荆国华 | 2012 | 化工进展2012，31，9： | 5 |
| 4 | 输煤皮带转载点密闭罩流场模拟与结构优化显示文摘为了研究输煤皮带转载点密闭罩内流场对吸尘效果的影响,采用Fluent软件对某转载点密闭罩内气固两相流动情况进行了数值模拟。通过气流分布和煤尘浓度分布的分析,发现溜槽转折处较大的气流偏转会增加煤尘起尘量和导致局部煤尘积聚,吸尘罩的开口角度对吸尘效果也有较大影响。为了疏导气流并加强吸尘效果,提出了溜槽转折处和吸尘罩的结构优化设计方案。研究表明,改进后气流分布更加均匀,吸尘效果有所提高,从而为转载点密闭罩的优化设计提供了参考。 | 吕太 车晟 郭澄昆 王旭东 | 2013 | 环境工程学报2013，7，7： | 4 |
| 5 | 磁稳定床及磁性催化剂的研究进展显示文摘对磁稳定床及磁性催化剂在石油化工和生物工程等领域的应用进行了归纳总结。磁稳定床已经应用于催化加氢、烟尘净化、干法选煤、生化分离、固定化生物反应器、细胞培养等过程。与传统工艺相比,磁稳定床兼有固定床和流化床的优点,能强化受传质传热限制的反应过程,提高反应效率,在实际应用中显示出独特的优越性。磁性催化剂的设计与开发是磁稳定床应用的关键,目前磁性催化剂以包覆型催化剂为主,其共同特点是具有适宜的磁性和低温反应活性,利于反应操作。磁稳定床及其磁性催化剂的研究开发是催化剂工业发展的一个新方向。 | 鲁威 文庆 袁华 吴元欣 | 2012 | 化学工程2012，40，3： | 2 |
| 6 | Identification of flow regimes and determination of the boundaries for magnetized fluidized bed with Geldart-B particles显示文摘The magnetized fluidized bed(MFB)with Geldart-B particles exhibits many distinct flow regimes depend-ing on the magnetic field intensity(H)and gas velocity(U_(g)).The identification of these regimes was reviewed for the MFB with magnetizable particles and that with binary admixture of magnetizable and nonmagnetizable particles.Meanwhile,methods for determining the boundaries between two adjacent flow regimes were clarified.The MFB state was found to depend not only on H and Ug but also on their application sequence(i.e.,operation mode)within certain operating zones.The dependence feature arose from that the MFB therein could have different equilibrium states for the same combination of H and Ug.Furthermore,such a polymorphic characteristic of the MFB was revealed to result from the internal friction among the particles that were in unfluidized/packed state.Many of the MFB states were demon-strated to be in metastable equilibrium.Nevertheless,they differed significantly from the metastates well-known in the discipline of physical chemistry,such as supercooling and superheated.In fact,they belonged to the amorphous/glass state.This review will deepen our hydrodynamic understanding of the MFB and further promote its commercial application in the chemical and biochemical industries. | Quanhong Zhu Hengjun Gai Hongbing Song Meng Xiao Tingting Huang Weikang Hao | 2022 | Particuology2022，，12： | 0 |
| 7 | Effect of magnetic field orientation on fluidized beds of magnetic particles:Theory and experiment显示文摘Geldart-A fluidized beds of fine particles experience a jamming transition between a fluid-like state and a solid-like state at a certain superficial gas velocity, that depends on the relative strength of interparticle attractive forces with respect to particle weight. Interparticle forces provide the bed with a certain tensile strength in the jammed state. In the work presented here we analyze the behavior of a fluidized bed of magnetic particles subjected to an externally applied magnetic field, which contributes to enhance interparticle forces. The importance of the magnetic contribution to interparticle forces is measured by the changes in the tensile strength and the superficial gas velocity at the jamming transition. The link of the field orientation with the microstructure of the bed is discussed. | Miguel ángel Sánchez Quintanilla Manuel Jesús Espin José Manuel Valverde | 2014 | Particuology2014，12，1： | 0 |
| 8 | 国内外地铁站台与车厢空气颗粒物浓度探析显示文摘近年的研究表明,地铁站台和车厢内部的空气颗粒物(PM10、PM2.5和PM1)浓度普遍远高于城市颗粒物的背景浓度,而且地铁系统空气中往往含有较多重金属颗粒物,其生物毒性较高。本文依据国内外城市地铁站台和车厢内颗粒物浓度检测资料,比较了中国与欧洲地铁系统中颗粒物的浓度和构成。受城市颗粒物的背景浓度、人流密度、车流密度及空气净化措施的影响,中国地铁站台的颗粒物浓度普遍略高于欧洲近代地铁站台,而地铁车厢内的颗粒物浓度处在同一水平;中外各城市地铁站台的颗粒物成分相似,都以重金属元素为主;根据检测经验及相关文献,在地铁系统中使用未经实地质量校正的光散射采样器,存在测量值的准确性问题。建议制定地铁环境检测标准,规范检测方法和仪器,以利于地铁系统空气环境的进一步改善。 | 涂明晖 涂有 涂光备 | 2022 | 暖通空调2022，52，9： | 0 |
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