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为研究炼焦尾煤与松枝共热解特性及气相产物产率分布规律,采用热分析仪和实验室小型固定床反应器对炼焦尾煤和松枝进行了共热解试验。结果表明:松枝的热失重过程相对于尾煤更为剧烈,当热解温度为900℃时,松枝和尾煤失重率分别为74.33%和13.25%,二者在最大热解失重速率温度区间有部分重叠,炼焦尾煤与松枝共热解有发生协同作用的可能。松枝单独热解时CO、CH_4、CO_2的产率要高于尾煤单独热解时的产率,但松枝热解H_2产率低于尾煤。尾煤热解气相产物总气量中,H_2产率比松枝高8.89%,而松枝热解气相产物中CO、CH_4和CO_2产率要比尾煤分别高出13.93%、4.10%和18.16%。添加不同比例的松枝,H_2产率理论计算值的变化趋势与试验值相同,但试验值略高于理论计算值;在低温时CH_4产率理论计算值高于试验值,而随着热解温度的升高,CH_4产率试验值则高于理论计算值。当松枝添加质量分数为40%时,热解气相产物热值最高,达到9 203.54 k J/kg。
In order to study the co-pyrolysis characteristics of coking tail coal and pine branch and the distribution of gas phase product yield, a co-pyrolysis test was conducted on the coking coal tail and pine branches by using a thermal analyzer and a laboratory small fixed-bed reactor. The results showed that the weight loss process of pine branches was more intense than that of tailings coal. The weight loss rates of pine branches and tailings were 74.33% and 13.25% respectively when the pyrolysis temperature was 900 ℃. Partial overlap, coke tailings and pine branches have a total of pyrolysis may occur synergies. The yield of CO, CH_4 and CO_2 at the time of pine branch alone pyrolysis was higher than that of the tailing pyrolysis, but the yield of H_2 of pine branch pyrolysis was lower than that of the tail coal. The total H 2 gas yield of the tail gas pyrolysis products was 8.89% higher than that of the pine branches, while the yields of CO, CH 4 and CO 2 were 13.93%, 4.10% and 18.16% higher than those of the tail coal, respectively. The results show that the theoretical calculation value of H_2 yield is the same with the experimental value, but the experimental value is slightly higher than the theoretical value. The calculated theoretical value of CH_4 yield is higher than the experimental value at low temperature. With the increase of pyrolysis temperature Of the increase, CH_4 yield test value is higher than the theoretical value. When the pine needles added mass fraction of 40%, pyrolysis products of the highest calorific value, reaching 9 203.54 kJ / kg.