生物质燃气焦油产率及其净化  

Tar character and cleaning of biomass gasification gas

作　　者：金亮[1] 童瑞明[2] 周劲松[1] 吴远谋[1] 骆仲泱 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,杭州310027 [2]浙江省电力公司,杭州310002

出　　处：《农业工程学报》2010年第S2期259-263,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：浙江省科技计划项目2008C01001-2

摘　　要：生物质气化技术是目前农村清洁用能的新型技术,但在应用中存在着燃气焦油灰分含量高,焦油味重,严重时堵塞管路等问题。该文以农村常用的下吸式生物质气化炉为核心,研究气化过程中焦油灰分的产出特性,并对出口燃气采用湿式喷淋装置和干式过滤装置相结合的联合过滤方法对燃气净化。试验表明,还原区温度对焦油和灰分含量有显著影响,高温可抑制焦油灰分产出(温度在650℃以上,1m3燃气中,出口焦油灰分维持在2000mg)。经过联合过滤后,焦油脱除效率达到99.5%以上,1m3燃气中,燃气中焦油灰分维持在10mg以内,达到燃气净化需求。Biomass gasification is a potential technology for providing clean gas in rural area.However,high contents of tar and ash in the gas have become serious problems,because it not only sends out offensive odour,but also clogs the gas pipe.A downdraft gasifier was used as gas generator,tar and ash content in the gas were studied.Besides,the gas cleaning efficiency of cleaning devices,including water spraying device and drying device,were also studied.The results showed that reduction zone temperature has a significant influence on tar and ash producing.High temperature(above 650℃) could reduce tar and ash contents(lower than 2000 mg/m3).Besides,using water-spraying and drying devices,efficiency of gas cleaning devices reached 99.5%,tar and ash contents after cleaning were below 10 mg/m3,accord the gas cleaning demand.

关 键 词：焦油 净化 生物质 气化 灰分 

分 类 号：TK6[动力工程及工程热物理—生物能]