气液固三相流化床反应器测试技术

Measuring Techniques for Gas-Liquid-Solid Three-phase Fluidized Bed Reactors

在简述已有三相流化床测试技术的基础上,着重对近年来开发的测试新技术的基本原理及优缺点进行了分析,包括光纤探头技术、超声探头技术、放射颗粒跟踪技术、X射线颗粒跟踪测试技术、颗粒图像测速技术、电容层析成像技术、激光多普勒测速技术和相多普勒测速技术等,同时,展望了三相流化床测试技术的新方向.

The gas-liquid-solid three-phase fluidized bed is a kind of very important devices for physical operation or chemical reactions and has been widely used in chemical, petrochemical, biochemical, metallurgical, environmental and coal liquefaction processes. However, the effective measuring techniques are still limited, which baffles the further development of the theory and application of three-phase fluidized beds. Fortunately, much progress has been made recently on the measuring techniques for gas-liquid-solid fluidization or three-phase flow with the development of modern science and technology and many new measuring methods have been developed. This article introduces the progress in research and development of measuring techniques in three-phase fluidized beds. The principles, advantages and disadvantages of these kinds of measuring techniques are discussed briefly, including new techniques developed recently such as optical fiber probes, ultrasonic probes, radioactive particle tracking, X-ray based particle tracking velocimetry, particle image velocimetry, electrical capacitance tomography, laser Doppler anemometry, and phase Doppler anemometry techniques. Furthermore, the research directions in the future and application prospects of some measuring techniques are given.