浆态床反应器内固体轴向悬浮特征的实验研究

实验研究了浆态床内固体的轴向悬浮特征。为了实现气体均布和优化固体悬浮效果,在浆态床内设置辐射式锐孔气体分布器和内部构件。实验以空气-水-玻璃微珠系统为研究对象,考察了初始固体质量含率(固含率)为0～30%,表观气速1～25 cm/s,液体循环量0～230 L/h对固体浓度均布的影响。从固体轴向分布的均匀性分别比较辐射式锐孔气体分布器和1 mm多孔板气体分布器的性能以及有/无内部构件的性能。结果表明,高表观气速下,辐射式锐孔气体分布器明显优于1 mm多孔板,内部构件明显优于无内部构件。由实验结果得知,该反应器适用于操作气速大于等于10 cm/s,最佳循环量为80～150 L/h,临界悬浮气速为10～12 cm/s,催化剂装填量的增加对临界悬浮气速影响不大。

The Experimental Study on the Axial Solids Suspension Characteristics in Slurry Bubble Column

The characteristics of the axial solids distribution in a slurry bubble column was studied experimentally.The radiant orifice gas distributor and internals were set in the slurry bubble column to distribute the gas uniformly and optimize the suspension effect of solids. The experiments were carried out in the air-water-glass beads system.The their effects on the uniform distribution of solid concentration were investigated as the initialized solid holdup was from 0 to 30%and the superficial gas velocity was from 1 cm/s to 25 cm/s and the liquid circulating rate was 0-230 L/h. Moreover, based on the uniformity of solid axial distribution,the respective performances of the radiant orifice gas distributor and the perforated plate(1 mm)were compared,as well as with and without internals.The experimental results indicated that in evidence the performances of the radiant orifice gas distributor apparent exceeded the perforated plate's(1mm)and with internals also exceeded without internals under high superficial gas velocity.Furthermore,as a result,the gas velocity with 10 cm/s was suitable for the reactor.The optimum circulating ratio was from 80 L/h to 150 L/h.And the critical gas velocity for complete solids suspension was from 10 cm/s to 12 cm/s,on which the effect of catalyzer quantity was not remarkable.