Study on a Novel Dual-Layer Granular Bed Filter for Cascade Filtration of Particulates at High Temperature
A novel dual-layer granular bed filter for hot gas cleaning was invented and studied.A dual-layer granular bed filter consists of several fixed beds in parallel,each having two layers of granules along the flow direction.The lower filter media are small and heavy granules like 0.5mm～1.0mm sands,while the upper filter media are big and light granules like 2mm～5mm expanded perlite particle.The combination of these two layers of filer media provides cascade filtration effect,having both high collection efficiency and great bed dust capacity (or low filter pressure drop).The bench test and two demonstration projects of this new granular bed filter are introduced in this paper.The bench test investigated the characteristics of collection efficiency and bed pressure drop of the filter,including the variation of collection efficiency and bed pressure drop versus time in one filtration cycle,effects of superficial velocity and temperature,finally presenting a comparison between dual-layer granular bed filter and single layer granular bed filter,etc.Demonstration project A was purposed to solve several key problems from laboratory to engineering application,for filtering the flue gas from two 13-ton aluminum melting furnaces.The dual-layer granular bed filter was designed to have the treatment capacity of 50000m3/h,consisting of 8 beds arranged in 8 layers and one row,each bed having 5000mm*1500mm area.Demonstration project B was purposed to solve the problem of scaling up the filter,which had the treatment capacity of 120000m3/h,consisting of 96 beds arranged in 12 rows and 8 layers,each bed having 1000mm*1500mm area.Both demonstration project A and B were very successful
filtration:granular bed filter:particulate
Guohua Yang San Huang Zhifa Hu Jianghua Zhou Chunling Yu
Maritime College,Ningbo University,Ningbo,Zhejiang 315211,China
国际会议
The 8th International Symposium on Gas Cleaning at High Temperatures(第八届国际高温气体净化技术研讨会 GCHT-8)
太原
英文
217－228
2010-08-23（万方平台首次上网日期，不代表论文的发表时间）