CAJ | 학술논문

　　利用超声场鼓泡塔和双电导探针气泡特征参数测量仪实时测定了加入不同种类和不同浓度添加剂前后鼓泡塔内氨气气含率与传质系数变化规律。实验结果表明：无添加剂时，超声频率为20-50-100 kHz组合，功率100 W时，鼓泡塔内气含率比无超声作用时增加了37%~74%，传质系数增大了39%~61%；气含率和传质系数随加入正辛醇浓度的增大呈现逐渐增长的趋势，当正辛醇浓度超过1.0%(V)时，气含率和传质系数趋于稳定；超声频率为20-50-100 kHz组合，超声功率100 W，正辛醇浓度为1.0%时鼓泡塔内气含率比无添加剂加入时增加了20%，传质系数增大了16%，可见超声场与添加剂协同作用有利强化气液相间分布、提高传质效果。
　　이용초성장고포탑화쌍전도탐침기포특정삼수측량의실시측정료가입불동충류화불동농도첨가제전후고포탑내안기기함솔여전질계수변화규률。실험결과표명：무첨가제시，초성빈솔위20-50-100 kHz조합，공솔100 W시，고포탑내기함솔비무초성작용시증가료37%~74%，전질계수증대료39%~61%；기함솔화전질계수수가입정신순농도적증대정현축점증장적추세，당정신순농도초과1.0%(V)시，기함솔화전질계수추우은정；초성빈솔위20-50-100 kHz조합，초성공솔100 W，정신순농도위1.0%시고포탑내기함솔비무첨가제가입시증가료20%，전질계수증대료16%，가견초성장여첨가제협동작용유리강화기액상간분포、제고전질효과。
This study deals with using a bubble feature measuring system named duplex conductivity probe to investigate the effects of kinds and concentrations of additives on the gas holdup and mass transfer coefficient in a bubble column with ultrasonic radiation of one frequency or multi-frequency. The results show that, in reverberating ultrasonic field of multi-frequency combination of 20-50-100 kHz and power of 100 W, the gas holdup of the without additives system increases 37%~74%, and at the same time, the mass transfer coefficient of the system increases 39%~61%. The gas holdup and the mass transfer coefficient of the system increase with increasing the concentration of octanol additive when the concentration is below 1.0%(V), and then they almost keep constant as the octanol additive concentration is increased beyond 1.0%. In reverberating ultrasonic field of multi-frequency combination of 20-50-100 kHz and power of 100 W, when the octanol additive concentration is 1.0%, the gas holdup in the bubble column is about 20% higher and the mass transfer coefficient is 16%higher than those in the case of the system without additive. The results show that the ultrasonic field and the additives have significant synergic effect of enhancing the dispersion and the mass transfer between the gas-liquid phases.