下吸式生物质气化炉气化性能研究  

Study of the Gasification Performance of a Downdraft Type Biomass Gasifier

作　　者：金亮[1] 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,浙江杭州310027

出　　处：《热能动力工程》2011年第1期105-109,127-128,共5页Journal of Engineering for Thermal Energy and Power

基　　金：浙江省科技计划基金资助项目(2008C01001-2)

摘　　要：生物质固定床气化技术具有运行稳定、可提供清洁能源等优点,但也存在气化效率差,燃气热值低的问题。以采用炉膛集中供风技术和还原区热量包裹技术的下吸式气化炉为研究对象,研究炉膛温度、空气当量比(ER)对燃气成分、燃气热值、气化效率等气化性能的影响,并与以往研究结果进行对比分析。实验表明,该气化炉能保证在较低ER内(0.1～0.35),获得较高的炉膛温度和还原区温度,产出的燃气热值在6.5 MJ/m3以上,气化效率达到65%,平均气化效率在55%以上,气化性能较为理想。Biomass fixed bed gasification technology features such merits as a stable operation and capability to serve as a clean energy source,however,there exist also problems,namely,a low gasification efficiency and a low fuel gas heating value.With a downdraft type gasifier serving as an object of study,which adopts the centralized air feeding technology in the furnace and heat packaging technology in the reduction zone,the influence of the furnace temperature and equivalent ratio(ER) of air on the fuel gas composition,fuel gas heating value and gasification efficiency etc.was studied and a comparison and analysis was made with the research results achieved in the past.The test results show that the gasifier under discussion can guarantee to obtain a relatively high temperature both in the furnace and the reduction zone at a relatively low equivalent ratio(ranging from 0.1 ~ 0.35) of air.The heating value produced by the fuel gas can be over 6.5 MJ/m3,the gasification efficiency can reach 65% and the average gasification efficiency is over 55%,thus the gasification performance is regarded as relatively perfect.

关 键 词：生物质气化 下吸式气化炉 还原区温度 空气当量比 

分 类 号：TK6[动力工程及工程热物理—生物能]