High-temperature electrical capacitance tomography for gas–solid fluidised beds

Kai Huang, Shuanghe Meng, Qiang Guo, Mao Ye, Jingjing Shen, Tao Zhang, Wuqiang Yang, Zhongmin Liu

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Electrical capacitance tomography (ECT) is a non-intrusive and non-invasive imaging technique for the visualisation of material distribution, e.g. in a gas–solid fluidised bed. So far, ECT has been successfully used in gas–solid fluidised beds at ambient temperature. However, ECT has been rarely used in high-temperature gas–solid fluidised beds, which is of practical importance in many applications. Considering that most fluidised bed reactors are operated at high temperature, it is necessary to investigate the application of ECT in high-temperature industrial processes. In this work, a high-temperature ECT sensor, which can withstand 1073 K, is designed and fabricated. It has been verified by three stationary objects. The results show that the ECT sensor can give satisfactory images at different high-temperature levels and the change in temperature has little effect on the signal-to-noise ratio. It has also been found that the minimum bubbling velocity estimated by ECT is the same as that obtained by pressure drop measurements, and two fluidisation regimes, i.e. bubbling and slugging can be identified by ECT.
    Original languageEnglish
    Article number104002
    JournalMeasurement Science and Technology
    Volume29
    Issue number10
    Early online date27 Jul 2018
    DOIs
    Publication statusPublished - 23 Aug 2018

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