上吸式生物质气化炉对碱金属的滞留原因分析  

Analysis on retention of alkali metals in updraft biomass gasifier

作　　者：王建伟[1] 刘宁 臧宏昱 李龙之[1] WANG Jianwei;LIU Ning;ZANG Hongyu;LI Longzhi(School of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, Chin)

机构地区：[1]山东科技大学机械电子工程学院,山东青岛266590

出　　处：《洁净煤技术》2017年第6期47-50,共4页Clean Coal Technology

基　　金：山东省优秀中青年科学家科研奖励基金资助项目(BS2014NJ014)

摘　　要：以花生壳、棉杆和玉米杆颗粒为燃料,设计一台可分别进行直燃和上吸式气化燃烧的装置,并对该装置在直燃状态下和上吸式气化燃烧状态下所产生的烟气进行碱金属含量测试。研究发现,尽管3种燃料的碱金属含量存在差异,但上吸式气化燃烧状态下的烟气碱金属含量均远低于直燃状态。以生物质为燃料时,上吸式气化炉特有的对挥发碱金属的过滤滞留效应,可有效缓解对下游用热设备的碱金属腐蚀。因而上吸式生物质气化炉是一种更为理想的替代煤炭的可再生能源利用设备。A novel device was designed allowing direct combustion and updraft gasification combustion with peanut shell, cotton stalk and corn stalk particles as feeds. The alkali metals content in the flue gas produced from the device in the direct combustion and up- draft gasification combustion processes was tested. The experimental results show that the alkali metals content in updraft combustion process is much lower than that in the direct combustion process, although there is a difference in the alkali metals content among these three fuels. It illustrates that the updraft gasifier has a unique filter retention effect on volatile alkali metals using biomass as feedstock, which can effectively alleviate the alkali metals corrosion of the downstream heat equipment. Therefore, updraft biomass gasifier is a better alternative coal renewable energy utilization equipment.

关 键 词：生物质 气化 碱金属 燃烧 

分 类 号：TQ545[化学工程—煤化学工程]