不同颗粒流化床层中挡板受力特性对比

doi:10.11949/j.issn.0438-1157.20160345

化工学报 ›› 2016, Vol. 67 ›› Issue (8): 3331-3339.DOI: 10.11949/j.issn.0438-1157.20160345

不同颗粒流化床层中挡板受力特性对比

刘对平, 董芳芳, 王蒙, 魏庆, 张永民

中国石油大学(北京)重质油国家重点实验室, 北京 102249

收稿日期:2016-03-25 修回日期:2016-05-13 出版日期:2016-08-05 发布日期:2016-08-05
通讯作者: 张永民
基金资助:
国家重点基础研究发展计划项目（2012CB215004）；国家自然科学基金项目（21276273）；中国石油大学（北京）科研基金项目（2462015YQ0312）。

Comparison of force characteristics in two fluidized beds with different particles

LIU Duiping, DONG Fangfang, WANG Meng, WEI Qing, ZHANG Yongmin

State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China

Received:2016-03-25 Revised:2016-05-13 Online:2016-08-05 Published:2016-08-05
Supported by:
supported by the National Basic Research Program of China (2012CB215004), the National Natural Science Foundation of China (21276273) and the Science Foundation of China University of Petroleum, Beijing (2462015YQ0312).

摘要/Abstract

摘要：

颗粒性质对流化床内气固流动特性具有重要的影响，不同颗粒床层内气固流动特性的不同也将引起床层中内构件受力特性的变化。采用在测试挡板表面粘贴应变计的方法，系统对比测量了一个斜片挡板在FCC颗粒（Geldart A）和石英砂颗粒（Geldart B）两种流化床内受力特性的差异，并系统比较了操作参数变化时挡板在两种颗粒床层中受力特性变化规律的差异。结果表明，在相同的操作条件下，挡板在B类颗粒床层中受力载荷的均方根值大小约是A类颗粒床层中的2～3倍；除挡板安装在靠近分布器位置外，总体来讲，在两种颗粒的床层中，挡板所受载荷强度都随表观气速的增大而增大。但是，在两种颗粒床层中，挡板安装高度变化对挡板受力特性影响差异较大，在B类颗粒床层中所受载荷强度随着安装高度增大而增大，而在A类颗粒床层中所受载荷强度随安装高度增大呈现先减小后增大的趋势。此外，挡板倾角度θ在75°～90°之间变化时，挡板所受载荷强度在两种颗粒流化床中均随着挡板倾角增大呈现急剧下降的趋势，而当θ=0°～75°时，B类颗粒床层中挡板所受载荷强度随挡板倾角增大略有下降，而A类颗粒床层中挡板所受载荷强度变化并不十分明显。

关键词: 挡板, 流化床, 受力, 颗粒, 影响

Abstract:

Particle properties have significant effect on gas/solids flow characteristics, which results in significantly different force characteristics exerted in the internals immersed in fluidized beds of different particles. In this study, the dynamic force in a tested slat immersed in fluidized bed was measured by adhering strain gauges on its surface. The force characteristics of the slat were systematically compared in two beds of FCC catalyst particles (Geldart A) and silica sand particles (Geldart B). The experimental results showed that the RMS load density acting on the slat in the bed of Geldart B particles was about 2-3 times higher than in the bed of Geldart A particles. Except installed near the bottom distributor, the measured load density on the slat increased with increasing superficial gas velocity in both beds. However, the effect of the installation height of the slat indicated great difference in the two beds. The measured load density on the slat increased with increasing installation height in the bed with Geldart B particles, while it decreased firstly and then increased with increasing installation height in the Geldart A particles bed. At θ=75°-90°, the measured load densities decreased sharply with increasing inclination angle in both beds. However, at θ=0°-75°, the measured load density decreased slightly with increasing inclination angle in the bed of Geldart B particles, while there was no obvious change in the bed of Geldart A particles.

Key words: slat, fluidized bed, force, particle, effect

中图分类号:

TQ028.8

刘对平, 董芳芳, 王蒙, 魏庆, 张永民. 不同颗粒流化床层中挡板受力特性对比[J]. 化工学报, 2016, 67(8): 3331-3339.

LIU Duiping, DONG Fangfang, WANG Meng, WEI Qing, ZHANG Yongmin. Comparison of force characteristics in two fluidized beds with different particles[J]. CIESC Journal, 2016, 67(8): 3331-3339.

参考文献 19

[1]	KUNⅡ D,LEVENSPIEL O.Industrial Application of Fluidized Beds[M]//Fluidization Engineering.2nd ed.USA:Butterworth-Heinmann,a division of Reed Publishing Inc.,1991:15-58.
[2]	吴占松,马润田,汪展文.流态化基础及应用[M].北京:化学工业出版社,2006:39-41.WU Z S,MA R T,WANG Z W.Fluidization Technology Foundation and Application[M].Beijing:Chemical Industry Press,2006:39-41.
[3]	陈甘棠,王樟茂.流态化技术的理论和应用[M].北京:中国石化出版社,1996:124-134.CHEN G T,WANG Z M.Theory and Application of Fluidization Technology[M].Beijing:China Petrochemical Press,1996:124-134.
[4]	金涌,余芷青,张礼,等.流化床脊形内构件[J].石油化工,1986,15(5):269-277.JIN Y,YU Z Q,ZHANG L,et al.Ridge type internal baffle for fluidized bed reactor[J].Petro.Chem.Eng.,1986,15(5):269-277.
[5]	DUTTA S,SUCIU G D.An experimental study of the effectiveness of baffles and internals in breaking bubbles in fluid beds[J].J.Chem.Eng.,1992,25(3):345-348.
[6]	BASKAKOV A P,MICHKOVSKⅡ B A.Vertical forces acting on horizontal disks in a fluidized bed[J].Journal of Engineering Physics,1974,27(6):1464-1466.
[7]	TAMARIN A I,LIVSHITS Y E,GALERSHITEIN D M,et al.Forces acting on a body in a non-uniform fluidized bed[J].Journal of Engineering Physics,1977,32(2):270-274.
[8]	KENNEDY T C,DONOVAN J E,TRIGAS A.Forces on immersed tubes in fluidized beds[J].AIChE J.,1981,27(3):351-357.
[9]	DONOVAN J E.A study of forces on simulated heat exchange tubes immersed in a cold fluidized bed[D].US:Oregon State University,1980.
[10]	HOSNY N M.Forces on tubes immersed in a fluidized bed[D].Canada:The University of British Columbia,1982.
[11]	HOSNY N M,GRACE J R.Transient forces on tubes within an array in a fluidized bed[J].AIChE J.,1984,30(6):974-976.
[12]	NAGAHASHI Y,GRACE J R,LIM K S,et al.Dynamic force reduction and heat transfer improvement for horizontal tubes in large-particle gas-fluidized beds[J].J.Therm.Sci.,2008,17(1):77-83.
[13]	NAGAHASHI Y,YAMAMOTO D,GRACE J R,et al.Forces on horizontal tubes of non-circular cross-section in fluidized beds[C]//The 14th International Engineering Conference on Fluidization:From Fundamentals to Products.Netherlands,2013.
[14]	NAGAHASHI Y,ASAKO Y,LIM K S,et al.Dynamic forces on a horizontal tube due to passing bubbles in fluidized beds[J].Powder Technol.,1998,98:177-182.
[15]	LEVY E K,WAGH M,SETHU H,et al.Pattern recognition analysis of bubbles impacting on tubes[J].Powder Technol.,1992,70:175-181.
[16]	LEVY E K,AYALON A,JOHNSON S,et al.Dynamic loading on a horizontal tube in a bubbling fluidized bed[C]//Annual Meeting of the America Institute of Chemical Egineerings:Fluidized Processes:Theory and Practice.USA:Publication of AIChE,1992:99-106.
[17]	王若艺,刘对平,李智,等.细颗粒气固流化床内斜片挡板受力特性的实验研究[J].过程工程学报,2015,15(3):375-380.WANG R Y,LIU D P,LI Z,et al.Experimental study on the force characteristics acting on the slat baffles in fine particles gas-solids fluidized bed[J].CJPE Journal,2015,15(3):375-380.
[18]	陈传尧.疲劳与断裂[M].武汉:华中科技大学出版社,2001:32-37.CHEN C Y.Fatigue and Fracture[M].Wuhan:Huazhong University of Science and Technology Press,2001:32-37.
[19]	熊有得.材料强度力学[M].北京:科学技术出版社,2009:290-291.XIONG Y D.Mechanics of Material Strength[M].Beijing:Science Press,2009:290-291.

不同颗粒流化床层中挡板受力特性对比

Comparison of force characteristics in two fluidized beds with different particles

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献 19

相关文章 15

编辑推荐

Metrics

本文评价

[1]	曾如宾, 沈中杰, 梁钦锋, 许建良, 代正华, 刘海峰. 基于分子动力学模拟的Fe₂O₃纳米颗粒烧结机制研究[J]. 化工学报, 2023, 74(8): 3353-3365.
[2]	郑玉圆, 葛志伟, 韩翔宇, 王亮, 陈海生. 中高温钙基材料热化学储热的研究进展与展望[J]. 化工学报, 2023, 74(8): 3171-3192.
[3]	张孟斌, 李锐, 张嘉杰, 马素霞, 张建胜. 基于共面电容原理的煤炭灰渣介电特性实验研究[J]. 化工学报, 2023, 74(7): 3028-3037.
[4]	杨峥豪, 何臻, 常玉龙, 靳紫恒, 江霞. 生物质快速热解下行式流化床反应器研究进展[J]. 化工学报, 2023, 74(6): 2249-2263.
[5]	郑志航, 马郡男, 闫子涵, 卢春喜. 提升管射流影响区内压力脉动特性研究[J]. 化工学报, 2023, 74(6): 2335-2350.
[6]	陈巨辉, 张谦, 舒崚峰, 李丹, 徐鑫, 刘晓刚, 赵晨希, 曹希峰. 基于DEM方法的旋转流化床纳米颗粒流动特性研究[J]. 化工学报, 2023, 74(6): 2374-2381.
[7]	张媛媛, 曲江源, 苏欣欣, 杨静, 张锴. 循环流化床燃煤机组SNCR脱硝过程气液传质和反应特性[J]. 化工学报, 2023, 74(6): 2404-2415.
[8]	袁子涵, 王淑彦, 邵宝力, 谢磊, 陈曦, 马一玫. 基于幂律液固曳力模型流化床内湿颗粒流动特性的研究[J]. 化工学报, 2023, 74(5): 2000-2012.
[9]	时国华, 何林珅, 赵玺灵, 张世钢. 余热回收喷淋塔的烟气颗粒物脱除特性研究[J]. 化工学报, 2023, 74(4): 1735-1745.
[10]	陈俊先, 姬忠礼, 赵瑜, 张倩, 周岩, 刘猛, 刘震. 基于微波技术的天然气管道内颗粒物在线检测方法研究[J]. 化工学报, 2023, 74(3): 1042-1053.
[11]	贾龙菲, 付少童, 向星, 张华海, 张弢, 王利民. 颗粒振动影响动量传递过程的格子Boltzmann方法模拟[J]. 化工学报, 2023, 74(2): 735-747.
[12]	李亚芾, 付亮亮, 白浩隆, 白丁荣, 许光文. 菱镁矿浮选尾矿直接合成同时制备镁橄榄石和镁砂研究[J]. 化工学报, 2022, 73(8): 3679-3687.
[13]	王凯玥, 马永丽, 李琛, 刘明言. 气液固微型流化床的气液传质系数[J]. 化工学报, 2022, 73(8): 3529-3540.
[14]	张东旺, 杨海瑞, 周托, 黄中, 李诗媛, 张缦. 生物质锅炉对流受热面积灰冷态模拟实验研究[J]. 化工学报, 2022, 73(8): 3731-3738.
[15]	刘新华, 韩振南, 韩健, 梁斌, 张楠, 胡善伟, 白丁荣, 许光文. 基于热解与燃烧反应重构的低NO _x 解耦燃烧原理与技术[J]. 化工学报, 2022, 73(8): 3355-3368.