Advances in research on granular bed filter for dust removal

doi:10.16085/j.issn.1000-6613.2017-0014

Abstract

Abstract: The development and application of high temperature gas dust removal technology makes great sense to the energy utilization and cleaner production in industrial processes. Granular filtration technology which shows a balance between efficiency and pressure drop,better economy and good adaptability in harsh environment,has provided an effective way to settle issues involved in efficient synthetically utilization of solid fuels,clean electricity generation and utilization of residual heat,etc. The principle and forms of granular bed filters(GBFs)were introduced in this paper. Special emphasis was placed on the structure type and improvement research of GBFs,including fixed GBFs,moving GBFs and other forms of GBFs. The influence factors and present studies on engineering application of GBFs were then summarized,and the development trend of GBFs was discussed at last. There are many control factors in moving GBFs and the filtration efficiency of moving GBFs still needs to be improved compared with fixed GBFs,but moving GBFs are more appropriate for industrial application and are the first choice,because moving GBFs can be operated continuously at a steady efficiency and pressure drop. In addition,uniform flow and high utilization efficiency of granular layer,optimization of dirty gas inlet modes and pertinency and integration design are the future directions of research for moving GBFs.

Key words: filtration, optimization, pyrolysis, granular bed, moving granular bed, hot gas cleanup

摘要： 高温气体高效除尘技术的开发与应用对于提高工业过程能量利用效率、实现清洁生产具有重要意义，其中颗粒床过滤技术因兼顾效率与压降、经济性好、苛刻环境适应性强等特点，为解决固体燃料高效综合利用、清洁发电、余热利用等领域涉及的高温气体净化难题提供了一条有效的途径。本文首先对颗粒床的除尘机理和分类进行了介绍，重点综述了颗粒床的结构形式和改进研究进展，从固定床、移动床到其他形式颗粒床，然后概述了颗粒床性能影响因素和工程应用研究现状，最后对颗粒床的发展趋势进行了展望。相较于固定床，移动床尽管效率尚待提升，运行控制因素也较多，但移动床过滤时效率和压降基本保持稳定，可以连续操作，更加适合工业化应用。本文总结出移动床是目前研究的热点，增强颗粒层整体均匀流动性和利用效率、优化进气方式以及集成性针对性设计是未来移动床的发展方向。

关键词: 过滤, 优化, 热解, 颗粒床, 移动床, 高温除尘

CLC Number:

YAN Shen, SUN Guogang, SUN Zhanpeng, HAN Xiao, HUANG Lei, ZHAO Fei. Advances in research on granular bed filter for dust removal[J]. Chemical Industry and Engineering Progress, 2017, 36(09): 3152-3163.

颜深, 孙国刚, 孙占朋, 韩笑, 黄雷, 赵斐. 颗粒床过滤除尘技术研究进展[J]. 化工进展, 2017, 36(09): 3152-3163.

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