基于Kolmogorov熵的气固鼓泡流化床中空隙率波动信号分析

doi:10.12096/j.2096-4528.pgt.20041

发电技术 ›› 2021, Vol. 42 ›› Issue (3): 322-328.DOI: 10.12096/j.2096-4528.pgt.20041

基于Kolmogorov熵的气固鼓泡流化床中空隙率波动信号分析

韩峰¹(), 丛堃林²(), 向杰³, 李清海²(), 张衍国²^,*(), 马静¹^,²

¹ 北京热华能源科技有限公司, 北京市海淀区 100085
² 清华大学能源与动力工程系, 北京市海淀区 100084
³ 润电能源科学技术有限公司, 河南省郑州市 450000

收稿日期:2020-05-13 出版日期:2021-06-30 发布日期:2021-06-29
通讯作者: 张衍国
作者简介:韩峰(1987), 男, 博士, 工程师, 研究方向为生物质等劣质燃料的热利用及其在分布式能源中的应用等, hanfeng@nowva.com.cn
丛堃林(1988), 男, 博士研究生, 研究方向为节能热力设备的研发与设计、燃料燃烧特性等, congkunlin@qq.com
李清海(1972), 男, 博士, 副研究员, 研究方向为传热、生物质气化与燃烧、污染物控制与脱除技术等, liqh@tsinghua.edu.cn
基金资助:
国家重点研发计划项目(2017YFB0603901);华能集团总部科技项目HNKJ20-H50(U20YYJC09)

Analysis of Voidage Fluctuations in Gas-Solid Bubbling Fluidized Bed Based on Kolmogorov Entropy

Feng HAN¹(), Kunlin CONG²(), Jie XIANG³, Qinghai LI²(), Yanguo ZHANG²^,*(), Jing MA¹^,²

¹ Beijing Nowva Energy Power Technology Co., Ltd., Haidian District, Beijing 100085, China
² Department of Energy and Power Engineering, Tsinghua University, Haidian District, Beijing 100084, China
³ Rundian Energy Science and Technology Co., Ltd., Zhengzhou 450000, Henan Province, China

Received:2020-05-13 Published:2021-06-30 Online:2021-06-29
Contact: Yanguo ZHANG
Supported by:
National Key Research and Development Program of China(2017YFB0603901);Huaneng Group Science and Technology Research Project HNKJ20-H50(U20YYJC09)

摘要/Abstract

摘要：

气固流动状态决定了流化床中气固两相的混合、传热和传质特性，对流化床装置的设计、运行和监测起着重要作用。在实验室内搭建的冷态气固鼓泡流化床上，采用颗粒浓度测量仪测量了不同工况条件下流化床床中心的空隙率波动信号，通过混沌分析的方法分析气固鼓泡床中空隙率时间序列的Kolmogorov熵及其分布特征，研究表观气速、静床高度和床体尺寸对Kolmogorov熵的影响规律。研究结果表明：表观气速对Kolmogorov熵的影响最大，静床高度次之，床体尺寸最小。

关键词: 气固鼓泡流化床, 空隙率, 时间序列分析, 混沌分析, Kolmogorov熵

Abstract:

The gas-solid flow state determines the gas-solid mixing, heat and mass transfer characteristics in the fluidized bed, and plays an important role in the design, operation and monitoring of the fluidized bed device. In a self-built cold gas-solid bubbling fluidized bed, voidage fluctuation signals were measured using the particle concentration measuring instrument at the center of the fluidized bed under different working conditions, and were analyzed by chaotic theory using Kolmogorov entropy. The influences of apparent gas velocity, static bed height and bed size were studied. It shows the apparent gas velocity has the largest influence on Kolmogorov entropy, followed by the static bed height, and the smallest is bed size.

Key words: gas-solid bubbling fluidized bed, voidage, time-series analysis, chaotic analysis, Kolmogorov entropy

中图分类号:

TK16

韩峰, 丛堃林, 向杰, 李清海, 张衍国, 马静. 基于Kolmogorov熵的气固鼓泡流化床中空隙率波动信号分析[J]. 发电技术, 2021, 42(3): 322-328.

Feng HAN, Kunlin CONG, Jie XIANG, Qinghai LI, Yanguo ZHANG, Jing MA. Analysis of Voidage Fluctuations in Gas-Solid Bubbling Fluidized Bed Based on Kolmogorov Entropy[J]. Power Generation Technology, 2021, 42(3): 322-328.

图/表 6

图1 实验系统

Fig.1 Schematic diagram of experiment system

图2 颗粒浓度测量仪及其探头端部示意

Fig.2 Schematic diagram of particle concentration meter and its probe end

图3 玻璃珠的粒度分布

Fig.3 Particle size distribution of glass beads

图4 不同高度的床中心空隙率波动信号的Kml熵随表观气速的变化情况

Fig.4 The change of Kml entropy with gas velocity at different heights

图5 静床高度对床中心空隙率波动信号的Kml熵的影响

Fig.5 The effect of static bed height on Kml entropy

图6 床体尺寸对床中心空隙率波动信号的Kml熵的影响

Fig.6 The effect of bed size on Kml entropy

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基于Kolmogorov熵的气固鼓泡流化床中空隙率波动信号分析

Analysis of Voidage Fluctuations in Gas-Solid Bubbling Fluidized Bed Based on Kolmogorov Entropy

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