Transfer Characteristics in Mechanically Stirred Airlift Loop Reactors with or without Static Mixers

The mechanically stirred internal loop airlift reactors equipped with or without static mixers are devised for intensification of gas-liquid mass transfer rate. The influences of superficial gas velocity, agitation or static mixers on gas hold-up, mixing time, liquid circulating velocity and volumetric mass transfer coefficient have been investigated with tap water and carboxymethyl cellulose (CMC) aqueous solution. The experimental results indicate that mechanical agitation is more efficacious than static mixer in highly viscous media for improving mass transfer in airlift reactors. The empirical correlation of volumetric mass transfer coefficient with apparent viscosity, and energy consumption for mechanical agitation and aeration is developed.

膜式燃气表计量信息采集技术

阐述膜式燃气表机械传递式、机电双采集式、电子采集式计量信息采集技术的原理和采集方式,提出机械传递式、机电双采集式计量信息采集技术已不能满足燃气表智慧化发展的需求,认为电子采集式计量信息采集技术是膜式燃气表计量信息采集技术的发展方向,是智慧燃气物联网系统的智能终端支撑技术。