期刊
MEASUREMENT SCIENCE AND TECHNOLOGY
卷 29, 期 4, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6501/aaa509
关键词
process tomography; fluidization; electrical capacitance tomography; microwave tomography; sensitivity analysis
资金
- National Natural Science Foundation of China [61320106004, 61771455]
- Royal Society Newton Advanced Fellowship [NA170124]
- NSFC
- Royal Society of the United Kingdom
- CAS Interdisciplinary Innovation Team
- EPSRC [EP/N034066/1] Funding Source: UKRI
Gas-solid fluidised beds are commonly used in particle-related processes, e.g. for coal combustion and gasification in the power industry, and the coating and granulation process in the pharmaceutical industry. Because the operation efficiency depends on the gas-solid flow characteristics, it is necessary to investigate the flow behaviour. This paper is about the application of process tomography, including electrical capacitance tomography (ECT) and microwave tomography (MWT), in multi-scale gas-solid fluidisation processes in the pharmaceutical and power industries. This is the first time that both ECT and MWT have been applied for this purpose in multi-scale and complex structure. To evaluate the sensor design and image reconstruction and to investigate the effects of sensor structure and dimension on the image quality, a normalised sensitivity coefficient is introduced. In the meantime, computational fluid dynamic (CFD) analysis based on a computational particle fluid dynamic (CPFD) model and a two-phase fluid model (TFM) is used. Part of the CPFD-TFM simulation results are compared and validated by experimental results from ECT and/or MWT. By both simulation and experiment, the complex flow hydrodynamic behaviour in different scales is analysed. Time-series capacitance data are analysed both in time and frequency domains to reveal the flow characteristics.
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