化工学报 ›› 2014, Vol. 65 ›› Issue (2): 422-429.DOI: 10.3969/j.issn.0438-1157.2014.02.008

• 流体力学与传递现象 • 上一篇    下一篇

电容层析成像在煤粉料仓下料中的应用

陆海峰, 郭晓镭, 陶顺龙, 龚欣, 鲁军   

  1. 华东理工大学煤气化及能源化工教育部重点实验室, 上海市煤气化工程技术研究中心, 上海 200237
  • 收稿日期:2013-05-07 修回日期:2013-06-04 出版日期:2014-02-05 发布日期:2014-02-05
  • 通讯作者: 龚欣
  • 基金资助:

    国家自然科学基金项目(21206041);中国博士后科学基金项目(2012M520847);中央高校基本科研业务费专项资金项目。

Application of electrical capacitance tomography in hopper discharge of pulverized coal

LU Haifeng, GUO Xiaolei, TAO Shunlong, GONG Xin, LU Jun   

  1. Key Laboratory of Coal Gasfication and Energy Chemical Engineering of Ministry of Education, Shanghai Research Center of Gasification Technology, East China University of Science and Technology, Shanghai 200237, China
  • Received:2013-05-07 Revised:2013-06-04 Online:2014-02-05 Published:2014-02-05
  • Supported by:

    supported by the National Natural Science Foundation of China (21206041), China Postdoctoral Science Foundation Funded Project (2012M520847) and the Fundamental Research Funds for the Central Universities.

摘要: 煤粉料仓下料是气流床粉煤气化工艺中粉体供料单元的重要组成部分,其安全稳定运行具有重大的经济意义。提出将电容层析成像(ECT)技术用于煤粉料仓下料,从而实现研究手段的可视化。在煤粉料仓下料系统上,通过线性反投影算法及图片累加技术,获得料仓出口管道截面的相对颗粒浓度分布图像和下料过程的二维流型图;对比分析了称重信号和ECT信号的时间序列曲线,并通过RSD统计方法定量描述煤粉下料的波动程度。结果表明,ECT研究与煤粉下料分区理论吻合良好,借助ECT可充分认识煤粉下料流型和气固作用特征。

关键词: 煤粉, 料仓下料, 成像, 流型, 气化, 粉体

Abstract: Hopper discharge is one of the most important components in the entrained-flow gasification technology of pulverized coal. The safety and stabilization of hopper discharge are of great economic significance. In this paper, electrical capacitance tomography (ECT) was used to realize the visualization of pulverized coal discharge. The ECT images were reconstructed using linear back projection (LBP) algorithm and accumulated to obtain the relative particle concentration distribution and two-dimensional images of flow pattern. Furthermore, the weighing signal and ECT signal were analyzed and compared. Finally, statistical method of RSD was used to describe the fluctuation of hopper discharge. It showed that the research results of ECT agreed well with divisional discharging theory, which confirmed the feasibility of ECT application to the hopper discharge of pulverized coal.

Key words: pulverized coal, hopper discharge, tomography, flow pattern, gasification, powders

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