自由落下床中稻草与煤高温快速共热解特性研究  

RAPID CO-PYROLYSIS OF RICE STRAW AND COAL IN HIGH TEPERATURE IN FREE FALL REACTOR

作　　者：刘爱彬[1] 陈雪莉[1] 唐建业[1] 李帅丹[1] 周志杰[1] 王辅臣[1] 

机构地区：[1]华东理工大学煤气化及能源化工教育部重点实验室,上海市煤气化工程技术研究中心,上海200237

出　　处：《太阳能学报》2016年第1期164-170,共7页Acta Energiae Solaris Sinica

基　　金：国家科技支撑计划课题(2012BAA09B02);新世纪优秀人才支持计划(NCET-12-0854);国家自然科学基金(21306050);国家高技术研究发展(863)计划(2011AA050106)

摘　　要：在自由落下床中对稻草、神府烟煤、凤矿无烟煤以及稻草与两种煤的混合物进行高温快速共热解试验，考察不同热解温度、不同稻草质量掺混比下稻草与煤共热解过程中的协同作用。研究结果表明：随着稻草质量掺混比的增大，热解气总产率逐渐增大，热解焦产率逐渐减小；热解产物产率的实际值与理论值不同，800℃共热解时焦油产率高于理论值，协同作用促进焦油的生成；1000～1400℃时气体总产率高于理论值，协同作用促进气体的生成；在800℃时热解气中CO的生成受到抑制，高于1000℃时，共热解促进CO、H2的生成。稻草与神府烟煤共热解焦的反应活性明显高于稻草与风矿无烟煤共热解焦；当稻草质量掺混比为40％、60％时共热解焦活性降低，当稻草质量掺混比大于60％时，共热解焦的反应活性则逐渐提高。A free fall reactor was used to investigated the rapid pyrolysis of rice straw, Shenfu bituminous coal and Fengkuang anthracite coal separately and co-pyrolysis of blends of rice straw with the two different coals. The synergetic effects were studied in different temperature and different blending mass ratio of straw. The results show that the yield of gas increased and the yield of char decreased with increase of straw blending ratio. Furthermore, there existed differences between actual value and theoretical value, and the yield of tar was promoted in 800 ℃ and the yield of gas was promoted in 1000-1400 ℃. CO was inhibited at 800 ℃, and CO, H2 were promoted at 〉1000 ℃ in the co-pyrolysis. Synergetic effects took place in CO2 gasification of co-pyrolysis char in TGA as well, and reactivity index of co-pyrolysis char of straw and Shenfu bituminous coal was higher than straw and Fengkuang anthracite coal. Commonly, reactivity index of co-pyrolysis char decreased when the straw blending ratio was 40%, 60% and increased significantly when the straw blending ratio was greater than 60%.

关 键 词：稻草 煤 共热解 自由落下床 协同作用 

分 类 号：TK6[动力工程及工程热物理—生物能]