不同规整填料旋转床的传质性能对比

摘要

Mass transfer performance of cross-current rotating packing bed with metallic wire structured packing and novel plastic structured packing respectively was investigated using Na2CO3- H2S as absorption system. The effects of liquid flow,gas-liquid ratio,and high-gravity factor on desulfurization rate and gas phase mass transfer coefficient were studied by theoretical derivation of expressions of gas-liquid mass transfer coefficientsKy andKya. Desulfurization rate of wire packing bed was 3%—4% higher than novel plastic packing bed under the same conditions,but Ky,Kya and pressure drop were 0.25—0.5、0.8—0.9 and 0.3—0.5 times of novel plastic packing bed.Kya of novel plastic packing bed was 1.45 times higher than that of bulk wire packing bed under similar working condition. Correlation ofKy,Kyaand gas phase Reynolds numbersReG,liquid phase Weber number WeL,Galileo numberGa was obtained by regression of experiment data.%采用Na2CO3-H2S为体系，利用规整丝网填料和新型塑料填料的错流旋转床为吸收设备，探究了两种填料床的传质性能，通过理论推导气液传质系数Ky和Kya的表达式，考察了液量、气液比、超重力因子对脱硫率、Ky和Kya的影响。实验结果表明：在相同条件下，规整丝网填料床的脱硫率略高于新型塑料填料床，约为3%～4%，但Ky、Kya和压降分别是新型塑料填料床的0.25～0.5、0.8～0.9和0.3～0.5倍。通过文献对比分析，在相近工况条件下，新型塑料填料床的Kya比散装丝网填料床提高了1.45倍。并对实验数据进行回归，拟合出Ky、Kya与气相雷诺数ReG、液相韦伯数WeL和伽利略数Ga之间的关联式。