农林废弃物循环流化床空气气化特性实验研究  

Experimental Study on the Air Gasification Characteristics of Agricultural and Forestry Waste in a Circulating Fluidized Bed

作　　者：高忠明 朱德敖 陈雨佳 刘三举 王勤辉[2] GAO Zhongming;ZHU Deao;CHEN Yujia;LIU Sanju;WANG Qinhui(Hubei Huadian Xiangyang Power Generation Co.,Ltd.,Xiangyang 441000,Hubei Province,China;State Key Lab of Clean Energy Utilization(Zhejiang University),Hangzhou 310027,Zhejiang Province,China)

机构地区：[1]湖北华电襄阳发电有限公司,湖北省襄阳市441000 [2]能源清洁利用国家重点实验室(浙江大学),浙江省杭州市310027

出　　处：《发电技术》2024年第3期535-544,共10页Power Generation Technology

基　　金：中央高校基本科研业务费(2022ZFJH004)。

摘　　要：【目的】考察生物质种类在不同参数下对循环流化床空气气化特性的影响,为宽燃料适应性的生物质循环流化床气化技术和生物质气化耦合燃煤发电技术提供相关数据参考。【方法】在自行搭建的小型常压循环流化床气化实验装置上,开展了以空气当量比(equivalent ratio,ER)、气化温度为参数,农林废弃物(稻壳、木屑、玉米秸秆和稻草)为原料的空气气化实验研究。【结果】稻壳、木屑、玉米秸秆和稻草气化气组分在不同空气当量比下的变化规律基本一致,随着空气当量比不断增加,稻壳、木屑、玉米秸秆和稻草的气化燃气低位热值和冷煤气效率均呈现先增后减的变化趋势,对于稻壳、木屑和玉米秸秆,ER为0.20时均为最优工况,最高冷煤气效率分别为46.19%、38.07%和37.71%;而对于稻草,ER为0.25时为最优工况,最高冷煤气效率可达39.55%;稻壳、木屑、玉米秸秆和稻草气化气组分中的三大可燃气体(CH4、CO、H2)在不同气化温度下的变化规律也一致,随着气化温度不断升高,稻壳、木屑、玉米秸秆和稻草的气化燃气低位热值和冷煤气效率也均呈现先增后减的变化趋势,其中稻壳和玉米秸秆冷煤气效率在气化温度为750℃时达到峰值,分别为46.19%和37.71%,而木屑和稻草在气化温度为760℃时达到峰值,分别为38.07%和37.56%。【结论】研究结果可为宽燃料适应性的生物质循环流化床气化技术和生物质气化耦合燃煤发电技术提供相关数据参考。[Objectives]The effects of biomass types on the air gasification characteristics of circulating fluidized bed under different parameters were investigated,so as to provide relevant data reference for biomass circulating fluidized bed gasification technology with wide fuel adaptability and biomass gasification coupled coal-fired power generation technology.[Methods]An experimental study of air gasification with air equivalent ratio(ER)and gasification temperature as parameters and agricultural and forestry waste(rice husk,sawdust,corn stalk and rice straw)as feedstock,was carried out on a small atmospheric circulating fluidized bed.[Results]The change patterns of syngas components for rice husk,sawdust,corn stalk and rice straw at different air equivalent ratios are basically the same.When the air equivalent ratio increases,both the low calorific value and cold gas efficiency of syngas for rice husk,sawdust,corn stalk and rice straw have an increasing-decreasing trend.For the rice husk,sawdust and corn stalk,ER=0.20 is the optimum operating condition,and the highest cold gas efficiency is respectively 46.19%,38.07%,and 38.07%.However,for rice straw,ER=0.25 is the optimum operating condition,and the maximum cold gas efficiency can reach 39.55%.The change patterns of the three combustible gases(CH4,CO,H2)in the syngas components for rice husk,sawdust,corn stalk and rice straw is also consistent at different gasification temperatures.When the gasification temperature increases,the low calorific value and cold gas efficiency of syngas for rice husk,sawdust,corn stalk and rice straw also show an increasing-decreasing trend.For rice husk and corn stalk,T=750℃is the optimum operating condition,and the highest cold gas efficiency is respectively 46.19%and 37.71%.However,for sawdust and rice straw,T=760℃is the optimum operating condition,and the maximum cold gas efficiency can reach respectively 38.07%and 37.56%.[Conclusions]It can provide relevant data reference for biomass circulating fluidized bed gasification techn

关 键 词：农林废弃物 生物质 循环流化床 空气气化 空气当量比 

分 类 号：TK6[动力工程及工程热物理—生物能]