Experimental and model studies on particle circulation rate in internal circulating clapboard-type fluidized bed

doi:10.11949/j.issn.0438-1157.20170561

CIESC Journal ›› 2017, Vol. 68 ›› Issue (9): 3427-3433.DOI: 10.11949/j.issn.0438-1157.20170561

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Experimental and model studies on particle circulation rate in internal circulating clapboard-type fluidized bed

JIANG Guodong, WEI Liping, WU Changsong, PENG Liuchang, HE Nan, CHEN Zhiwen

Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei Energy, College of Chemical Engineering, Xibei University, Xi'an 710069, Shaanxi, China

Received:2017-05-05 Revised:2017-06-27 Online:2017-09-05 Published:2017-09-05
Contact: 10.11949/j.issn.0438-1157.20170561
Supported by:
supported by the National Natural Science Foundation of China (51606153),the Natural Science Basic Research Plan in Shaanxi Province (2016JQ5101) and the Science Foundation for Postdoctoral Research of China (2017M613189).

隔板式内循环流化床颗粒循环速率实验与模型

江国栋, 魏利平, 吴长松, 彭浏畅, 何楠, 陈志文

西北大学化工学院, 陕北能源先进化工利用技术教育部工程研究中心, 陕西西安 710069

通讯作者: 魏利平
基金资助:
国家自然科学基金项目（51606153）；陕西省自然科学基础研究计划项目（2016JQ5101）；中国博士后科学基金项目（2017M613189）。

Abstract

Abstract:

The influence of fluidization velocity in high and low velocity regions, height of static bed, and clapboard gap on internal flow of particles in internal circulating clapboard-type fluidized bed were experimentally studied by changing operating conditions and structural parameters. The results showed that the particle circulation rate was significantly affected by these four parameters. The particle circulation rate first increased and then decreased with the increase of one parameter while the other three parameters were kept unchanged. Hence, particle circulation is a nonlinear complex system of multiple operational and structural parameters. The La Nazue model was modified to predict the particle circulation rate without providing pressure drop between clapboard gap. The error between the calculated and experimental results for various particles was within 23%.

Key words: internal circulation, fluidized-bed, two-phase flow, particle circulation rate, voidage

摘要：

在不同操作参数及结构参数下对隔板式内循环流化床的颗粒内循环速率进行了实验研究，研究了高速区和低速区的流化速度、静床层高度、隔板间隙等参数对颗粒内循环流动的影响。结果表明这4个参数对颗粒内循环速率都有显著的影响，当其他3个参数确定时，随着其中一个参数的增加，颗粒内循环速率均呈现先增加后减小的趋势，这一结果表明，颗粒内循环过程是多种操作和结构参数的非线性复杂系统。为预测颗粒内循环速率，修正了La Nauze 模型，该模型无须提供压降参数即可计算颗粒内循环速率，对于多种颗粒，其计算结果和实验相差在23%之内。

关键词: 内循环, 流化床, 两相流, 颗粒循环率, 空隙率

CLC Number:

TQ530.2

JIANG Guodong, WEI Liping, WU Changsong, PENG Liuchang, HE Nan, CHEN Zhiwen. Experimental and model studies on particle circulation rate in internal circulating clapboard-type fluidized bed[J]. CIESC Journal, 2017, 68(9): 3427-3433.

江国栋, 魏利平, 吴长松, 彭浏畅, 何楠, 陈志文. 隔板式内循环流化床颗粒循环速率实验与模型[J]. 化工学报, 2017, 68(9): 3427-3433.

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Experimental and model studies on particle circulation rate in internal circulating clapboard-type fluidized bed

隔板式内循环流化床颗粒循环速率实验与模型

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