氧热法电石合成淤浆鼓泡床反应器的流动特性

针对氧热法电石合成的电石吸热反应和炭燃烧放热耦合特点，本文设计并研究了适用该过程的三相淤浆鼓泡床反应器。采用空气-水-氯化聚氯乙烯（CPVC）模拟物系，实测了不同表观气速、固体颗粒进料量和静液高度下淤浆鼓泡床床层中局部平均气含率、固含率轴向分布和大、小两类气泡的分布。结果表明表观气速越大，局部平均气含率越大；固体颗粒的加入减小了床层局部平均气含率。当Ug在0.136~0.196m/s之间时，固含率轴向分布随表观气速增大趋于均匀；固体颗粒进料量越小则固含率沿轴向分布越均匀。随着表观气速的增加，小气泡含量逐渐增加，大气泡含量逐渐减小；随着静液高度的增加，大气泡含量均是先增大后减小。上述结果表明电石生成反应与燃烧供热反应原位耦合于淤浆鼓泡床中是可行的。

Applicability and hydrodynamics of a slurry bubble column reactor for oxygen-heating calcium carbide production

With a particular focus on the oxygen-heating calcium carbide synthesis process,where the endothermic calcium carbide synthesis is coupled with exothermic coke combustion,this work investigated experimentally the applicability and hydrodynamics of a suitably designed slurry bubble column reactor for the process.Average gas holdup,axial solid concentration and bubble size distribution in an air-water-chlorinated poly(vinyl chloride)(CPVC) three-phase system were measured.The results show that the average gas holdup increased with increasing superficial gas velocity,whilst addition of solid particles significantly reduced the average gas holdup in the reactor.The axial distribution of solid holdup remained uniform with increasing superficial gas velocity in the range Ug=0.136-0.196m/s and with decreasing solid particle feed velocity.The small bubble holdup increased but the large bubble holdup decreased with increasing superficial gas velocity.The large bubble holdup initially increased and then decreased with increasing liquid bed height.Our results indicate that the slurry bubble column reactor can be used in oxygen-heating calcium carbide production.