DOWNER

作品数：20被引量：62H指数：6
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Mixing effects of high-speed jets in gas-solid riser and downer reactors
《Particuology》2024年第9期196-209,共14页Zihan Yan Dongdong Wang Lining Wu Chunxi Lu 
the National Key Research and Development Program of China(grant No.2022YFA1506200);the open foundation of State Key Laboratory of Chemical Engineering(grant No.SKL-ChE-23B02).
For the high-temperature and short-contact time gas-solid reaction process,riser and downer are considered appropriate reactors.To realize an intensive and complete mixing of reactants with catalysts,the feed raw is a...
关键词：RISER DOWNER Gas-solid two-phase flow JET 
Modeling the axial hydrodynamics of gas-solid counter-current downers被引量：8
《Particuology》2020年第3期135-143,共9页Juanbo Liu Xinhua Liu Zhixin Zhang Hui Zhao Wei Ge 
the Strategic Priority Research Pro-gram of the Chinese Academy of Sciences(No.XDA07080400);the Informationization Program of the Chinese Academy ofSciences(No.XXH13506-301)。
Gas-solid counter-current downer reactors,in which particles move downward in an upward gas flow,can achieve high solid concentration for high heat and/or mass transfer rates.However,the particles may reverse their di...
关键词：Mathematical modeling Counter-current downer FLOODING EMMS MESOSCALE 
Modeling the hydrodynamics of cocurrent gas-solid downers according to energy-minimization multi-scale theory被引量：6
《Particuology》2016年第6期110-119,共10页Zhixin Zhang Shanwei Hu Xinhua Liu Hui Zhao 
We appreciate financial support from the Strategic Prior- ity Research Program of the Chinese Academy of Sciences （No. XDA07080400） and the Natural Science Foundation of China （Nos. 21376244 and 91334107）.
Cocurrent gas-solid downer reactors have many applications in industry because they possess the tech- nological advantages of a lower pressure drop, shorter residence time, and less solid backmixing when compared with...
关键词：Mathematical modeling Hydrodynamics Fluidization Downer Cluster Multiscale 
Modeling coal pyrolysis in a cocurrent downer reactor被引量：2
《Particuology》2015年第4期154-159,共6页Yan Zhang Yuehong Zhao Xianfeng He 
financially supported by the International Science & Technology Cooperation Program of MOST(No.2011DFA61360);the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA07080400);the National Nature Science Foundation of China(No.20703047)
In this paper, a model for fast coal pyrolysis in a cocurrent downer reactor is developed, in which both hydrodynamics and coal pyrolysis kinetics are simultaneously considered. The results of simulations based on thi...
关键词：Coal pyrolysis MODEL Cocurrent downer Low-rank coal 
High-density circulating fluidized bed gasifier for advanced IGCC/IGFC-Advantages and challenges被引量：20
《Particuology》2010年第6期602-606,共5页Guoqing Guan Chihiro Fushimi Atsushi Tsutsumi Masanori Ishizuka Satoru Matsuda Hiroyuki Hatano Yoshizo Suzuki 
supported by the New Energy and Industrial Technology Development Organization(NEDO)
Coal-fired Integrated Gasification Combined Cycle （IGCC） and Integrated coal Gasification Fuel-cell Com- bined cycle （IGFC） are being developed as high-efficiency electric power generation technology. However, the...
关键词：IGCC/IGFC High-density circulating fluidized bed Gasifier Riser Downer Bubbling fluidized bed Exergy recuperation Biomass Coal 
Eulerian-Lagrangian simulation of distinct clustering phenomena and RTDs in riser and downer被引量：11
《Particuology》2010年第1期44-50,共7页Yongzhi Zhao Yi Cheng Changning Wu Yulong Ding Yong Jin 
supported by the National Natural Science Foundation of China (NSFC) under Grant Nos. 20306012 and 20806045;the National Foundation of PR China for Authors of Excellent Doctoral Dissertations (No. 200245);Specialized Research Fund for Doctoral Program of Higher Education (No.20050003028)
Numerical simulation of fully developed hydrodynamics of a riser and a downer was carried out using an Eulerian-Lagrangian model, where the particles are modeled by the discrete element method （DEM） and the gas by t...
关键词：Hydrodynamics Mixing Riser Downer Computational fluid dynamics （CFD）Discrete element method （DEM） 
STUDY ON THE OVERALL PRESSURE BALANCE OF A DOWNFLOW CIRCULATING FLUIDIZED BED SYSTEM被引量：4
《China Particuology》2006年第3期153-159,共7页Hengzhi Chen Dawei Yang Hongzhong Li Shiyu Tan 
A pressure balance model for a circulating fluidized bed unit that incorporates a downer has been proposed. The model predictions were validated with the experimental data obtained from a special cold-model circulatin...
关键词：circulating fluidized bed operation stability DOWNER RISER 
CFD SIMULATION OF FLUID CATALYTIC CRACKING IN DOWNER REACTORS被引量：1
《China Particuology》2006年第3期160-166,共7页Fei Liu Fei Wei Yu Zheng Yong Jin 
the Natura Science Foundation of China under contract number:20176024
A mathematical model has been developed for the simulation of gas-particle flow and fluid catalytic cracking in downer reactors. The model takes into account both cracking reaction and flow behavior through a four-lum...
关键词：DOWNER fluid catalytic cracking （FCC） lumping kinetic model computational fluid dynamics （CFD） 
LOCAL SLIP VELOCITY IN A DOWNER被引量：2
《China Particuology》2003年第6期258-261,共4页Songgeng Li Weigang Lin Jianzhong Yao 
supports from the National Program of Basic Research(No.G1999022103);Key Project of the National Natural Science Foundation of China(No.29936090)are gratefully acknowledged.
Based on the EMMS model, the local slip velocity between gas and solid is systematically analyzed and a theoretical correlation of local slip velocity with local voidage for a downer is derived as follows:U_s(r)/U_t=D...
关键词：EMMS model local slip velocity VOIDAGE DOWNER 
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