关键词: 三相流化床, 测试技术, 气液固流态化, 反应器

Abstract: 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.

Key words: three-phase fluidized bed, measuring technique, gas-liquid-solid fluidization, reactor