套式旋风分离器减排水煤气中焦油的性能评价(摘选)

Performance Evaluation of ‘Jacketed Cyclone' for Reduction of Tar from Producer Gas( Extracts)

生物质气化炉在低于1 300℃情况下产生水煤气,并伴随有重质烃(焦油)、粉尘、烟尘颗粒、碱金属、酸和碱性气体等,这都会导致恶臭气味和排放问题。对于大多数污染物而言,先进的测量技术和减少/去除技术可以降低其排放。但就焦油而言,目前缺乏普遍可接受的、经济的减排技术。设计和开发的套式旋风分离器正是朝着这个方面努力。目前开发的套式旋风分离器利用旋风分离器外5℃、360 L/h流速的循环水可以从水煤气中除去99.60%的焦油。设备简单、便宜,由于循环水可再利用并且减少了冷凝水,因此套式旋风分离器是一种环境友好型设备。该文介绍了用于减少水煤气中焦油含量的套式旋风分离器的设计、开发和性能评价。

Biomass gasifiers which are operated at temperatures below 1 300℃ yield producer gas with heavy hydrocarbons( Tars),dust,soot particles,alkali metals,acids,alkali gases,etc.,which cause foul odours and emission problems. For most of these contaminants,well- developed measurement and reductionremoval techniques are available. However,for tar removal,at present there is dearth of universally accepted and economically feasible technology. The design and development of this jacketed cyclone is a determined effort in this direction. The jacketed cyclone that has been developed,could remove about99. 60% tar from producer gas using circulating water at the periphery of cyclone that was maintaining at a temperature of 5℃with a uniform flow rate of 360 L/h. Apart from being simple and cheap,the jacketed cyclone is environment friendly because it reuses the circulating water and reduces the condensate that was formed with the other available technologies. This paper covers the design,development and performance evaluation of jacketed cyclone used for the reduction of tar content in producer gas.