流化床反应器内活性焦流动特性的模拟研究

doi:10.3976/j.issn.1002-4026.2017.06.010

Abstract

Abstract:

The numerical simulation was employed to investigate hydrodynamics of activated coke of two-dimension fluidized bed under different operation conditions, based on the two-fluid model. Results show that the pressure drop of fluidized bed is up to maximum with low gas velocity and high solid flux, and it increases gradually with the increase of solid volume fraction. Axial solid concentration of activated coke at the bottom of fluidized bed is denser than that at the top, which

verifies the heterogeneous distribution of particles. Axial averaged velocity of particles is easily subject to gas velocity, which is low at the bottom of fluidized bed and increases with the increase of bed height due to gas entrainment. Therefore, reasonable operation conditions (such as gas velocity and solid circulating flux) are significant for improving gassolid reaction efficiency of fluidized bed.

Key words: numerical simulation, fluidized bed, dry desulfurization, activated coke

CLC Number:

TK09

HE Yan, WU Gong-peng, CHEN Wei. Simulation study on hydrodynamics of activated coke in fluidized bed reactor[J].SHANDONG SCIENCE, 2017, 30(6): 58-64.

References

［1］郭慕孙. 流态化手册[M]. 北京：化学工业出版社, 2008.
［2］CHANG J, CAI W, ZHANG K, et al. Computational investigation of the hydrodynamics, heat transfer and kinetic reaction in an FCC gasoline riser[J]. Chemical Engineering Science, 2014, 111(8):170179.
［3］HE P, ZHU C, HO T C. A twozone model for fluid catalytic cracking riser with multiple feed injectors[J]. Aiche Journal, 2015, 61(2):610619.
［4］CONTRACTOR R M, GARNETT D I, HOROWITZ H S, et al. A new commercial scale process for nbutane oxidation to maleic anhydride using a circulating fluidized bed reactor[J]. Studies in Surface Science & Catalysis, 1994, 82:233242.
［5］BI X T, LIU X. High density and high solids flux CFB risers for steam gasification of solids fuels[J]. Fuel Processing Technology, 2010, 91(8):915920.
［6］王小芳, 金保升, 钟文琪. 高通量循环流化床上升管气固流动特性实验研究[J]. 中国电机工程学报, 2009, 29(17):2731.
［7］WU J, XU B, LOU Z, et al. Performance analysis of a biomass circulating fluidized bed gasifier[J]. Biomass & Bioenergy, 1992, 3(2):105–110.
［8］陈俩, 石洪, 张莹. 烟气循环流化床(CFBFGD)干法脱硫优化调整[J]. 四川环境, 2013, 32(5):108112.
［9］尹正明, 李紫龙, 史旭. 活性焦脱硫技术应用现状与技术经济性分析[J]. 中国资源综合利用, 2011, 29(8):3134.
［10］ZHANG LQ, CUI L, LI B, et al. Experimental study of SO2 removal by powder activated carbon in fluidized bed reactor[C],∥2010 AsiaPacific Power and Energy Engineering Conference.［S.1.］ IEEE, 2010.
［11］LI T W, GEL A, PANNALA S, et al. CFD simulations of circulating fluidized bed risers, part I: Grid study[J]. Powder Technology, 2014, 254:170180.
［12］刘增辉. 烟气脱硫脱硝集成技术工艺分析及试验[D]. 天津：天津大学, 2007.
［13］BI H, ZHU J. Static instability analysis of circulating fluidized beds and concept of highdensity risers[J]. Aiche Journal, 1993, 39(8):12721280.

[1]	ZHANG Guojian, MENG Hao, XIONG Wei, BAI Tao, MENG Xianchen, WANG Jun, LÜ Xiao. Predicting surface movement and deformation for continuous mining and continuous backfilling under an artificial lake [J]. Shandong Science, 2023, 36(5): 33-43.
[2]	HUANG Xiaolei, DING Wei. Preparation and performance of sustained-release encapsulated gel breaker [J]. Shandong Science, 2023, 36(4): 97-103.
[3]	LI Peng-ju, QIAN Lin-gen, WU Qiang, HUANG Shan, CHEN Su. Impact of foundation pit dewatering and excavation with suspended waterproof curtain on adjacent high-speed railway piers [J]. Shandong Science, 2022, 35(6): 116-122.
[4]	LI Hua-nan, HUANG Ji-kai, DONG Kai-ming. Microstudy on mixing characteristics of dissimilar particles in bubbling fluidized beds [J]. Shandong Science, 2022, 35(4): 68-76.
[5]	DONG Hui,REN Xu-yun. Analysis of hydrate and sand particle movement based on DEM-CFD coupling method [J]. Shandong Science, 2022, 35(3): 123-130.
[6]	WANG Xiao-yu,ZHANG Yu-xiang. Heat transfer performance of heat exchanger tubes with inserted central inclined rod [J]. Shandong Science, 2022, 35(3): 35-42.
[7]	JI Can, LIU Zhi-gang, LÜ Ming-ming. Numerical investigation of the flash evaporation process inside a nozzle with two S-shaped internal vanes in a waste heat power generation system [J]. Shandong Science, 2021, 34(6): 77-82.
[8]	GAO Guo-qiang, CHEN Guo-fu. A new heat transfer calculation model for oil reservoirs with multiple fluids [J]. Shandong Science, 2021, 34(5): 49-57.
[9]	ZHOU Xin-pei, CHEN Wei, HE Yan. Numerical study of the flue gas desulfurization system using rapid preparation amorphous powder activated coke as desulfurizer [J]. Shandong Science, 2021, 34(5): 86-96.
[10]	JI Jun-na. Numerical simulation of slope wave overtopping under the protection of fence panels [J]. Shandong Science, 2021, 34(4): 14-20.
[11]	HUO Mu-jie, BIE Hai-yan, LIN Zi-xin, AN Wei-zhong. Evaluating the performance of external-drive rotary pressure exchanger with tilted rotor runner [J]. Shandong Science, 2020, 33(6): 16-21.
[12]	LIU Jin, JIANG Hui-lue, LIU Bo, DU Da-wei. External flow field analysis and streamlined improvement of a car [J]. Shandong Science, 2020, 33(3): 87-92.
[13]	WEN Yong-qi, XIE Dong-fan, WANG Xiang, ZHOU Hao. Lane-changing strategy based on inter-vehicle communication [J]. Shandong Science, 2019, 32(4): 46-55.
[14]	SUN De-zhi，WANG Gui-qing，TIAN Chang-wen. Simulation of casting process for large aluminum alloy impeller based on MAGMASOFT [J]. SHANDONG SCIENCE, 2018, 31(4): 44-49.
[15]	TANG Sheng,ZHAO Yao-hua， DIAO Yan-hua,QUAN Zhen-hua. Thermal performance of a new kind of heat sink fabricated by flat aluminum multiport extruded tubes for electronic devices cooling [J]. SHANDONG SCIENCE, 2018, 31(3): 39-47.

Simulation study on hydrodynamics of activated coke in fluidized bed reactor

PDF (PC)

Like

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Metrics

Comments

Recommended 0