掺混比例对生物质和煤流化床共气化特性影响的试验研究  

Influence of Blending Ratios on Fluidized Bed Co-gasification of Biomass and Coal

作　　者：鲁许鳌[1] 阎维平[1] 

机构地区：[1]华北电力大学能源与动力工程学院,电站设备状态监测与控制教育部重点实验室,保定071003

出　　处：《动力工程》2009年第10期977-983,共7页Power Engineering

摘　　要：采用新型床料在鼓泡流化床中进行了2种典型的木本和草本生物质与烟煤的空气-水蒸气气化试验,研究了生物质掺混比例对燃气组分和热值、气化效率及碳转化率等参数的影响规律.结果表明:当松木屑的掺混比例从0%增大到100%时,H2和CO的体积含量分别增加了4.6%和4.4%,CO2的体积含量减少了3%,CH4和CnHm的含量也有所增加;当稻秸的掺混比例从0%增大到100%时,CO的体积含量先从25.8%上升至27.5%,再下降至25.3%,其他燃气组分的变化趋势与松木屑和煤气化的相类似;随着生物质掺混比例的增加,2种生物质和煤共气化的气化效率和碳转化率均有所提高,且在共气化过程中存在协同效应.In order to study the influence of blending ratios on gas component and LHV,gasification efficiency and carbon conversion rate during co-gasification of biomass（pine sawdust or rice straw） and coal in a bubbling fluidized bed,experimental tests were carried out with air and steam.Results show that when the blending ratio of pine sawdust rises from 0% to 100%,the volume concentration of H_2 and CO will respectively increase by 4.6% and 4.4%,CO_2 reduce by 3%, and CH_4 and C_nH_m will both increase slightly;whereas when the blending ratio of rice straw rises from 0% to 100%,the volume concentration of CO will rise from 25.8% to 27.5% and then drop to 25.3%,variation of other gas components during co-gasification of rice straw and coal is similar to that of the pine sawdust.When the blending ratio of biomass rises,gasification efficiency and carbon conversion rate of above two biomass and coal co-gasification processes are both raised,during which synergy effect is found to be existent.

关 键 词：共气化 流化床 松木屑 稻秸 烟煤 空气-水蒸气 掺混比 

分 类 号：TQ546.4[化学工程—煤化学工程] TK6[动力工程及工程热物理—生物能]