High Temperature Gas Filtration and Particle Characterisation during Steam-Oxygen Blown Gasification of Biomass

摘要：

Two experimental campaigns were performed with the aim to study the effect of two different bed materials,magnesite and olivine during steam-O2 biomass gasification.The test-rig consists of a 100 kWth atmospheric circulating fluidized-bed gasifier and a high temperature filter unit which contains 3 rigid ceramic candles with an outer diameter of 60 mm,10 mm wall thickness and a length of 1500 mm.Tests were performed with different fuels (Awood,Bwood,miscanthus and straw).Two types of filter elements were used,Dia-Schumalith1 and Dia-Schumalith1 N,which operated at 800℃ for 58 hours and 50 hours,respectively.The filtration performance was studied through continuous observation of the increasing pressure drop during the build-up of the dust cake.Gas face velocities ranged between 2.5 and 5 cm/s.DSN elements showed longer steady filtration compared to DS candles with filtration efficiencies equal to 100％.Formation of calcium and potassium silicates resulted from filter cake analyses.The filtration process influenced gas and tars composition of the incoming gas flow.Hydrogen content was increased of about 10％ (dry basis) and the heavier tars appeared to be broken into lighter chains,such as naphthalene,whose concentration increased

关键词： Ceramic candles:High Temperatures:Filter cake:Ashes:Biomass

作者: E. Simeone M.Siedecki M.Nacken S.Heidenreich W.de Jong

作者单位: Process and Energy Department,Energy Technology Section,3ME Faculty,Delft University of Technology,L Pall Filtersystems GmbH Production Site Schumacher,Zur Flügelau,70,D-74564 Crailsheim,Germany

会议类型: 国际会议

会议名称: 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)

会议地点: 太原

会议语种:英文

页码: 200-216

在线出版日期: 2010-08-23（万方平台首次上网日期，不代表论文的发表时间）