为研究水煤浆（CWS）的快速热解特性，利用高频加热炉，以神木煤作为CWS制作原料，开展快速热解实验，并与慢速热解实验结果作对比，分析了热解气的释放规律（产率、组分及比例等）及热解特性与反应温度、加热速率、停留时间之间的关系。结果表明：热解气以H2、CO、CH4和CO2成分为主；在高于1 000 ℃和较长的反应时间下进行快速热解，有利于生成高体积分数和高产率的还原性气体；快速热解条件下，随着温度的升高，H2和CO的产率持续增加（H2的产率增加了约0.45 L/g， CO的产率增加了约0.14 L/g），而CH4的产率先上升后下降（在900 ℃时产率最高为0.12 L/g），CO2产率在低温段有些许上升之后几乎没有明显变化（只增加了约0.03 L/g）；快速热解条件下，H2和CO的相对体积分数随着温度的升高而持续增加（分别增加了约45%和5%），CH4和CO2的体积分数则随温度的升高而下降（CH4下降约35%，较为剧烈，而CO2则下降了约10%~20%）；在慢速热解时，H2，CO2和CH4的产率会随着最终温度的增加，呈先上升后下降的趋势（最高点在约1 100 ℃），CO产率则呈上升趋势；慢速热解阶段H2和CO2的相对体积分数随着温度的增加略有变化（CH4则下降了3%）， CO增加约5%。

In order to study the rapid pyrolysis characteristics of coalwater slurry (CWS),Shenmu coal was used as a raw material for coalwater slurry production,and a highfrequency heating furnace was used to carry out the rapid pyrolysis experiment,comparing with the experimental results of the slow pyrolysis,which analyzed the release rules of pyrolysis gas,such as gas yield,composition and ratio,etc.,and the relation of pyrolysis characteristics and reaction temperature,heating rate and residence time.The results show that the pyrolysis gases mainly consist of H2,CO,CH4 and CO2.Rapid pyrolysis proceeds at temperatures of above 1 000 ℃ and for longer reaction time,which is beneficial to the generation of reducing gas with high volume fraction and yield.Under the conditions of rapid pyrolysis,with the increase of temperature,the yield of H2 and CO continues to increase,the yield of H2 is increased by about 0.45 L/g,and the yield of CO is increased by about 0.14 L/g,while the yield of CH4 firstly increases and then decreases,reaching the highest point of 0.12 L/g at 900 ℃,the yield of CO2 hardly changes after a slight increase in the low temperature section,which is only increased by about 0.03 L/g.Under the conditions of rapid pyrolysis,the relative volume fractions of H2 and CO continue to increase with the increase of temperature,increasing by about 45% and 5% respectively; the volume fractions of CH4 and CO2 decrease with the increase of temperature,the decrease of CH4 by about 35% is more severe,and the CO2 is decreased by about 10% to 20%.Under the conditions of slow pyrolysis,the yields of H2,CO2 and CH4 firstly increase and then decrease with the increase of the final temperature,reaching the highest point at about 1 100 ℃; but the yield of CO shows an upward trend.In the stage of slow pyrolysis,the relative volume fractions of H2 and CO2 change slightly with the increase of temperature,while CH4 is decreased by about 3%,and CO is increased by about 5%.

TQ530.2

国家重点研发计划（2018YFB0604202）