Study on the regulation of bed density in gas-solids high-density fluidized bed

被引：0

作者：

Ren, Guangjian ^{[1
,2
,3
]}

Li, Xianglin ^{[1
,2
,3
]}

Zhao, Pengfei ^{[1
,2
,3
]}

Guo, Junwei ^{[1
,2
,3
]}

Yang, Fan ^{[1
,2
,3
]}

Zhang, Mingrui ^{[1
,2
,3
]}

Zhang, Bo ^{[1
,2
,3
]}

机构：

[1] Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, China University of Mining & Technology, Jiangsu, Xuzhou

[2] School of Chemical Engineering & Technology, China University of Mining & Technology, Xuzhou

[3] Jiangsu Key Laboratory for Clean Utilization of Carbon Resources, China University of Mining & Technology, Jiangsu, Xuzhou

来源：

Energy Sources, Part A: Recovery, Utilization and Environmental Effects | 2024年 / 46卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Density control; Gas-solids fluidized bed; High-density separation; particle gradation; Time-domain analysis;

D O I：

10.1080/15567036.2024.2430410

中图分类号：

学科分类号：

摘要：

Wet separation of oil shale has problems such as high-water content, low heat efficiency, prolonged drying times, and low operational efficiency, etc. Current fluidized dry separation technology for low-grade oil shale suffers from instability due to the mixed heavy medium properties. This paper employs a high-density dry separation system to conduct an investigation into the separation of low-quality oil shale, Geldart B magnetite powder and Geldart B ferrosilicon ore powder are utilized as the binary heavy medium. The study delves into the impact of varying mixing heavy medium properties on bed flow characteristics, with a thorough analysis of the factors influencing bed stability and the time-domain fluctuation of bed density. The optimal mixing ratio for ensuring separation bed stability has been determined. The experimental results indicate that with the increase in ferrosilicon ore powder content, the range of bed density control expands to 2.34–2.71 g/cm3. In order to ensure the stability of the heavy medium, the appropriate mixing ratio of ferrosilicon ore powder is 50%. At this ratio, the average bed density is 2.50 g/cm3, with a standard deviation of 0.037 g/cm3, resulting in a significant improvement in bed stability. © 2024 Taylor & Francis Group, LLC.

引用

页码：16758 / 16776

页数：18

共 29 条

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