温度对循环流化床双床气化中热解炉产物的影响

在循环流化床双床煤高温热解气化试验台上,以神木烟煤为燃料在不同温度下进行了热解气化试验,该试验台利用上下返料器将热解炉和气化炉耦合在一起,其中热解炉为N2气氛,气化炉通入空气作为气化剂,试验主要研究热解炉底部温度对热解煤气及热解炉底渣的影响。试验结果表明:随热解炉底部温度升高,热解煤气中H2体积分数升高,CH4,CO2体积分数降低,CO体积分数先降低后升高,热解煤气主要组分气体的收率增加。试验所取热解炉底渣样品的孔比表面积分布和孔比体积分布主要集中于中小孔(0—50 nm),其总比表面积和总孔体积大小顺序为在817℃最大,844℃次之,766℃最小,在N2气氛、1 200℃条件下,CO2反应的活性大小顺序为817℃最大,766℃次之,844℃最小。

Effect of temperature on pyrolysis products in dual circulating fluidized beds of gasification

In order to investigate the effect of temperature on the pyrolysis gas and slag of the pyrolysis unit,the pyrolysis and gasification experiments of Shenmu bituminous coal at different temperatures were conducted in a dual circulating fluidized beds test rig.The experimental results show that with temperature rise,the volume fraction of H2 in pyrolysis gas increases,that of CH4 and CO2 decreases,that of CO decreases initially and then increases,and the yield of the main components of pyrolysis gas increases.The specific area and the pore volume of the slag sampled from the pyrolysis unit are mainly small and middle holes(0-50 nm),the specific area and the pore volume of the samples are the largest at 817 ℃,come the second at 844 ℃,and followed by those at 766 ℃.At the conditions of 1 200 ℃ and N2 atmosphere,the reactivities of CO2 and the samples are the largest at 817 ℃,come the second at 766 ℃,and followed by those at 844 ℃.