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首页> 外文期刊>Chemical engineering journal >Phase holdup measurement in a gas-liquid-solid circulating fluidized bed(GLSCFB)riser using electrical resistance tomography and optical fibre probe
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Phase holdup measurement in a gas-liquid-solid circulating fluidized bed(GLSCFB)riser using electrical resistance tomography and optical fibre probe

机译：电阻层析成像和光纤探头在气液固循环流化床（GLSCFB）提升管中的相持率测量

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Phase holdups were measured in the riser section of a gas-liquid-solid circulating fluidized bed(GLSCFB).Electrical resistance tomography(ERT)as a non-invasive imaging technique,pressure transducers(PTs)and fibre optic probes were employed.Water was used as continuous and conductive phase,air as the gas phase and glass beads as solid nonconductive phases.ERT technique is based on conductivity measurement of the continuous phase(water in this study),which provides color-coded cross-sectional view of phases with a frequency of up to 250 images per second.The local conductivity measured by a number of electrodes located at the periphery of the plane was then further converted into a local phase concentration distribution based on Maxwell's relation.The results obtained by PTs,when combined with ERT results,were used to determine gas and solid holdups.Fibre optic probe was also employed to measure gas holdup independently.To measure gas and solid holdup,a model was introduced to exploit the fibre optic data in differentiating gas bubbles from solid particles in the riser.Radial profiles of the phase holdups were determined.
机译：在气-液-固循环流化床（GLSCFB）的立管段中测量了相保持率。作为无创成像技术的电阻层析成像（ERT），压力传感器（PTs）和光纤探头。 ERT技术基于连续相（在本研究中为水）的电导率测量，它提供了具有色标的相的横截面图，用于连续和导电相，空气用作气相，玻璃珠用作固体非导电相。频率高达每秒250幅图像。然后，通过位于Maxwell的关系下，将位于平面外围的多个电极测得的局部电导率进一步转换为局部相浓度分布。将ERT结果用于确定气体和固体含量。还使用光纤探针独立测量气体的含量。为了测量气体和固体含量，引入了一个模型来开发气体和固体含量。区分立管中固体颗粒与气泡的光纤数据。确定了相滞留率的径向分布。

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