Experimental and Theoretical Study on Fluidization of Stalk-Shaped Biomass Particle in a Fluidized Bed
Experimental and Theoretical Study on Fluidization of Stalk-Shaped Biomass Particle in a Fluidized Bed
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秸秆状生物质颗粒流化床流化实验与理论研究
DOI：
10.1515/1542-6580.2691
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发表时间：
2011-07
影响因子：
1.6
通讯作者：
Jin, Baosheng
中科院分区：
文献类型：
--
作者：
Zhang, Yong;Zhong, Wenqi;Jin, Baosheng
生物质本身或生物质和惰性颗粒的混合物的流化力学的详细知识是涉及生物质的流化床的成功设计和操作的关键。本文对生物质单独流化和生物质与砂混合流化的特性进行了实验和理论研究。实验装置为装有多个压力传感器的分段流化床。以秸秆状棉秆为生物质原料，以三种不同粒径的砂子为惰性颗粒。将棉秆和沙子混合，得到三个二元体系，其中每个混合物中生物质颗粒的重量百分比不同。流化床经历了以下状态，取决于气体表观速度和初始混合分数：固定流化，鼓泡流化和湍流流化。实验结果表明，砂的添加对生物质流化有积极的影响，床层的初始排列方式对压降随气速的发展有影响。所建立的二元混合物最小流化速度（Umf）预测方程对低生物质浓度混合物的Umf值预测结果令人满意。此外，还提出了用雷诺数和阿基米德数来预测转捩速度（Uc）的关联式。计算的Uc与实验数据吻合得很好。
Detailed knowledge of the fluidization mechanics of biomass itself, or of mixtures of biomass and inert particles is critical to successful design and operation of fluidized bed involving biomass. In this study, the fluidization behaviors of biomass alone and sand-biomass mixture were experimentally and theoretically studied. A segmented fluidized bed equipped with multiple pressure transducers was used as the experimental apparatus. The cotton stalk with a shape of stalk was employed as biomass material, and three different sizes of sand were utilized as inert particle. By mixing cotton stalk and sand, three binary systems were obtained, in which only the weight percentage of biomass particle in each mixture is different. The fluidized beds experienced the following states, depending on gas superficial velocity and initial mixture fraction: fixed, bubbling fluidization and turbulent fluidization. It is found that the additive of sand has positive influence on the fluidization of biomass and the initial arrangement of bed has influence on the development of pressure drop with the gas velocity. The developed equation for predicting the minimum fluidization velocity (Umf) of binary mixture quite satisfactorily predicts the Umf values of mixture with low biomass concentration. In addition, the correlation expressed in terms of Reynolds and Archimedes numbers to predict transition velocity (Uc) is proposed. Calculated Uc is in excellent agreement with the experimental data.
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DOI：
10.1016/0923-0467(94)02875-b
发表时间：
1995-05
期刊：
The Chemical Engineering Journal and The Biochemical Engineering Journal
影响因子：
--
作者：
H. Bi;J. Grace
通讯作者：
H. Bi;J. Grace
影响因子：
3.7
作者：
P. Cai;Yong Jin;Z.-Q. Yu;Zhifang Wang
通讯作者：
P. Cai;Yong Jin;Z.-Q. Yu;Zhifang Wang
影响因子：
15.1
作者：
Danica V. Brzić;D. Ahchieva;E. Piskova;S. Heinrich;Ž. Grbavčić
通讯作者：
Danica V. Brzić;D. Ahchieva;E. Piskova;S. Heinrich;Ž. Grbavčić
影响因子：
3
作者：
K. Kobe
通讯作者：
K. Kobe
影响因子：
15.1
作者：
V. N. Kashkin;V. S. Lakhmostov;I. A. Zolotarskii;A. Noskov;J. .. Zhou
通讯作者：
V. N. Kashkin;V. S. Lakhmostov;I. A. Zolotarskii;A. Noskov;J. .. Zhou