CAJ | 학술논문

针对循环流化床提升管出口T形弯头，以FCC催化剂颗粒为物料，采用动态压力传感器，对T形弯头内的气固两相流的动态压力进行了实验测量，以此分析T形弯头内动态压力的特性。实验结果表明，由于在T形弯头盲管处颗粒折返造成的冲击，形成了一个压力脉动源。小波分析表明T形弯头处的压力脉动主频来自盲管内，而次频能量所占比例随着颗粒质量流率增加而加大。T 形弯头内的动态压力的标准偏差与颗粒质量流率呈线性关系，可以用于表征循环流化床内的颗粒质量流率。
침대순배류화상제승관출구T형만두，이FCC최화제과립위물료，채용동태압력전감기，대T형만두내적기고량상류적동태압력진행료실험측량，이차분석T형만두내동태압력적특성。실험결과표명，유우재T형만두맹관처과립절반조성적충격，형성료일개압력맥동원。소파분석표명T형만두처적압력맥동주빈래자맹관내，이차빈능량소점비례수착과립질량류솔증가이가대。T 형만두내적동태압력적표준편차여과립질량류솔정선성관계，가이용우표정순배류화상내적과립질량류솔。
To investigate the characteristics of pressure fluctuations in the T-abrupt exit, the dynamic pressures of gas-solid two-phase flow in the T-abrupt exit of a CFB riser were measured in a circulating fluidized bed device with FCC catalyst by dynamic pressure sensors. The pressure fluctuations of the blind tube in T-abrupt exit were the strongest and the gas-solid two-phase flow in T-abrupt exit formed a new fluctuation source which was the result of the particles cluster turning back in the blind tube. Wavelet analysis revealed that pressure fluctuations in the T-abrupt exit mainly came from the fluctuation source in the blind tube constituting the main frequency, while the energy ratio of secondary frequency increased with increasing solids mass flux. The standard deviation of the dynamic pressures in the T-abrupt exit was linear with the solids mass flux, and in the inlet of the T-abrupt exit the linear relationship was well-defined. So the real-time solids mass flux could be characterized by the standard deviation of the dynamic pressures in the inlet of the T-abrupt exit.