料屉式颗粒床对高温含尘烟气的过滤特性  

Filtration characteristics of drawer type granular bed for high-temperature dust-laden flue gas

作　　者：尹少武 张文聪[1,2] 王旭 刘传平 童莉葛[1,2] 王立 YIN Shaowu;ZHANG Wencong;WANG Xu;LIU Chuanping;TONG Lige;WANG Li(School of Energy and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China;Beijing Key Laboratory of Energy Saving and Emission Reduction in Metallurgical Industry,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学能源与环境工程学院,北京100083 [2]北京科技大学冶金工业节能减排北京市重点实验室,北京100083

出　　处：《环境工程学报》2023年第1期173-179,共7页Chinese Journal of Environmental Engineering

基　　金：国家重点研发计划项目(2022YFC3800401)。

摘　　要：采用料屉式颗粒床过滤装置对工业生产过程中产生的高温烟气处理问题进行研究。装置包括粉尘输送装置和颗粒床过滤装置两部分,其中过滤装置采用分层料屉,可观察单层料屉粉尘捕集情况。考察了烟气温度、凝尘添加比例和滤料颗粒粒径等因素对颗粒床过滤特性的影响。结果表明:随烟气温度逐渐升高至凝尘熔点、滤料颗粒粒径的减小以及凝尘添加比例的增加,床层过滤效率及压降均会上升,颗粒床出口处粉尘浓度不断降低;其中凝尘添加比例对于过滤特性影响最显著。在实验范围内最佳过滤条件下,颗粒床过滤效率最高可达99.40%,出口处烟气质量浓度低至12.02 mg·m^(-3)。通过考察首层料屉滤料表面粉尘粘结形貌,发现滤料层粘结面呈现“由中心向四周发散”的整体格局,颗粒表面有“锥形”粘结层出现。本研究结果可为提升料屉式颗粒床过滤除尘器的除尘功效提供参考。The treatment of high temperature waste gas produced in industrial production process was studied by using the granular bed filter.The device included two parts:dust conveying device and granular bed filter device.The filter device adopted layered material drawers,which could observe the dust collection of the single layer drawer.The effects of flue gas temperature,the proportion of condensed dust and the particle size of filter material on the filtration characteristics of the granular bed were investigated.The results showed that the filtration efficiency and pressure drop of granular bed would increase with the increase of flue gas temperature to the melting point of dust,the decrease of particle size of filter material and the increase of the proportion of condensed dust and the dust concentration at the outlet of the granular bed keeped decreasing.Among them,the proportion of condensed dust showed the most significant influence on the filtration characteristics.Under the best filtration conditions within the experimental range,the highest filtration efficiency of the granular bed could reach 99.40%,and the flue gas concentration at the outlet was as low as 12.02 mg·m^(-3).Through the investigation of the dust adhesive morphology on the surface of the filter material in the first layer drawer,it was found that the adhesive surface of the filter material layer presented an overall pattern of"spreading from the center to the periphery",and there was a"conical"adhesive layer on the surface of the particle.The results of this study can provide a reference for improving the dust removal efficiency of the drawer type granular bed filter.

关 键 词：高温除尘 料屉式颗粒床 烟气过滤 过滤效率 

分 类 号：TU834.634[建筑科学—供热、供燃气、通风及空调工程] X701.2[环境科学与工程—环境工程]