脱油沥青气化炉内气化反应数值模拟

Numerical Simulation of Gasification Reaction in De-oiled Asphalt Gasifier

对以脱油沥青(DOA)为原料的气流床气化炉内多相反应流动进行了数值模拟,考察了氧油质量比、蒸汽加入量和气化压力对气化性能的影响。结果表明:随氧油质量比(mO2/mDOA)增大,气化炉内温度逐渐升高;当mO2/mDOA=0.93时,有效气含率达到最大值0.837。随蒸汽量增大,气化炉出口气体温度降低,而有效气含率在蒸汽、油质量比(mH2O/mDOA)为0.48时达到最大值;操作压力对气化炉出口有效气含量和温度影响很小。

The multiphase reaction flow in entrained flow gasifiers using de-oiled asphalt（DOA） as feedstock was studied by numerical simulation.The influences of m_（O_2）/m_（DOA）,m_（H_2O）/m_（DOA） and gasifier pressure on gasifier characteristics were discussed.The results show that with the increasing of m_（O_2）/m_（DOA）,the gas temperature increases.The volume fraction of CO and H_2 reaches maximum（0.837）,when m_（O_2）/m_（DOA） is（0.93.） With the increasing of m_（H_2O）/m_（DOA）,the gas temperature decreases,and the proportion of effective gases（CO＋H_2） reaches maximum when m_（H_2O）/m_（DOA） is 0.48.The operation pressure has little effect on gasifier outlet gas composition and temperature.