摘要
为实现煤直接液化残渣的清洁、高效利用,利用管式炉进行液化残渣的热解实验,研究了残渣热解气体析出产率、速率及气体组成随温度的变化规律.结果表明：400℃前,气体析出量较少,全程共析出气体143.6 L,残渣热解气平均产率为0.2393 L/g,析出速率呈“两段式”分布,500～550℃和700～750℃出现两个极值,分别为1.86、1.89 L/min.气体组成中H2含量较高,450～900℃平均体积分数高达65％,分别在500℃出现极大值66.4％和800℃出现最大值70.2％;H2析出特点与气体产率相似,呈“两段式”分布.CH4在600℃出现最高值23.8％,CmHn在500℃出现最高值7.7％,CO在900℃出现极大值9.0％,CO2在残渣热解气中含量较少,分别在500℃出现极大值1.15％和800℃出现极大值1.24％.
To achieve clean and effective use of direct liquefaction residue,conduct the pyrolysis experiment on fixed-bed tubular furnace.Investigate gas yield,precipitation rate and the change rule with temperature.The results show that,when the temperature is below 400 ℃,the average yield of gas is 0.2393 L/g,the total gas yield are 143.6 L.The precipitation rate shows a ＂ two section＂ peculiarity,there are two extreme value at the temperature range of 500 ℃ to 550 ℃ and 700 ℃ to 750 ℃,which is 1.86 L/min and 1.89 L/min respectively.When the temperature is below 450 ℃,the H2 in gas is little,while its average content reach up to 65 percent between 450 ℃ and 900 ℃.The extreme value is 66.4 percent at 500 ℃ and the maximum value is 70.2 percent at 800 ℃.Its precipitation rate is similar to the average yield of gas.The maximum value of CH4 appears at 600 ℃,which is 23.8 percent,and the maximum value of CmHn appears at 600 ℃,which is 7.7 percent.There is a little CO under 750 ℃,the maximum value of CO appears at 900 ℃,which is 9.0 percent.There is a little CO2 in the gas,there are two extreme value at 500 ℃ and 800 ℃,which is 1.15 percent and 1.24 percent respectively.
出处
《洁净煤技术》
CAS
2014年第2期84-86,共3页
Clean Coal Technology
基金
国家自然科学基金资助项目(U1261101)
关键词
液化残渣
热解
产气规律
气体组成
固定床
管式炉
liquefaction residue
pyrolysis
precipitation rate
gas composition
fixed-bed
pyrolysis
tubular furnace
