煤与重质油共气化热态模拟实验

Experimental study of coke and heavy oil co-gasification process

以固定床为反应器,焦炭和胜利常压渣油为原料,进行煤与重质油共气化热态模拟实验,考察了不同操作参数对出口气体成分及结焦生成物的影响。结果表明:当m(氧气)∶m(水蒸气)∶m(渣油)为0.3∶1.0∶1.0、裂解温度为800℃、停留时间小于0.5 s时,烯烃(C2H4+C3H6)、烷烃(CH4+C2H6)和合成气(H2+CO)的体积分数分别为24%、28%和37%。应用扫描电镜观察了焦炭介质表面上结焦生成物的形貌,发现通氧气后结焦生成物残留量较少。热态模拟实验结果进一步表明,煤与重质油共气化可以制备低碳烯烃,同时联产合成气,且能有效地解决重质油裂解造成的结焦问题。

Co-gasification of coke and Shengli atmospheric residuum in a fixed bed reactor was performed in the preliminary experimental study. The effects of operating parameters on gaseous products composition and coke formation were investigated. When the mass ratio of oxygen/steam/residuum was set at 0.3/1.0/1.0, pyrolysis temperature set at 800℃, and residence time less than 0.5s, the contents of light olefins （C2H4＋C3H6）, alkanes（CH4＋C2H6） and synthesis gas （H2＋CO） were about 24%, 28% and 37%, respectively. The SEM images of the coke formed on the feed coke surfacefrom residuum pyrolysis were observed, and the results showed that the coke formed was almost consumed with blown oxygen. The results of hot simulative experiment further indicated that coke and heavy oil co-gasification could produce light olefins and synthesis gas together, and the coking problem could be solved effectively.