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针对重油残渣(沥青颗粒)气化制氢工艺,在流化床-提升管耦合反应器大型冷模实验装置上,考察了不同操作条件下沥青颗粒体系在耦合反应器内截面平均密度的轴向分布.结果表明,对单组分沥青颗粒体系,耦合反应器适宜的操作条件为:提升管表观气速u_(g,r)=0.70~1.76 m/s;与A类颗粒相比,沥青颗粒在耦合反应器内的流动特性呈现不同的特点,整个反应器沿轴向可分为底部流化床密相区、提升管底部低密度区、提升管颗粒密度重整区、提升管加速区、充分发展区和出口约束区6个区域;反应器内截面平均密度随颗粒质量流率增大而增大,随表观气速增大而减小;确定了耦合反应器内提升管区域截面平均固含率的影响参数为ε_p’,Fr及H/D_r,并利用实验数据回归了平均固含率的轴向分布经验模型,其计算值与实验值吻合较好.
Aiming at the process of gasification hydrogen production from heavy oil residue (bitumen particles), the influence of asphalt granular system on the average axial cross section density The results showed that the suitable operating conditions of the coupled reactor for single-component asphalt granular system were as follows: the apparent air velocity of riser u_ (g, r) = 0.70 ~ 1.76 m / s; Particles flow characteristics in the coupling reactor showed different characteristics, the reactor can be divided along the axial direction of the bottom fluidized bed dense phase zone, the bottom of the riser low density zone, riser particle density reforming zone, riser acceleration zone , Fully developed zone and export restricted zone. The average cross-section density of the reactor increased with the increase of particle mass flow rate and decreased with the increase of apparent air velocity. The cross-section of the riser pipe in the coupled reactor The influence parameters of the average solid content rate are ε_p ’, Fr and H / D_r, and the experimental data are used to regress the axial distribution empirical model of the average solid content. The calculated values are in good agreement with the experimental values.