中文摘要：

旋风分离器是循环流化床锅炉的关键部件之一，其分离性能将直接影响整个循环流化床锅炉的总体设计及锅炉的运行性能。大型循环流化床锅炉采用多个旋风分离器与炉膛出口并联布置实现气固分离。研究其分离系统的气固两相流动特性可进行旋风分离器的分离性能分析。本文针对600MW超临界循环流化床锅炉的冷态模型，采用电容层析成像测量技术进行旋风分离器入口烟道内气固两相流固相颗粒浓度测量，在不同床料量和炉膛表观风速下，研究多个旋风分离器入口固体颗粒分布特性，得到不同分离器入口处固体颗粒浓度随流化风速、初始物料量的变化，分析了电容原始信号的波动特性，研究结果对流化床大型化多分离器优化布置提供了支持。

英文摘要：

The gas-solids hydrodynamic behaviour is one of the key issues to scale up a circulating fluidised bed （CFB） from small scale to large scale with multi-cyclone separators system. To inves- tigate the solids distribution in a large scale CFB with six cyclone separators, electrical capacitance tomography is used to measure the solids concentration in the inlet of the cyclone. A rectangular ECT sensor has been designed and used to measure the solids distribution in a cross-section in the inlet of cyclone. Dynamic test with different fluidisation velocity and initial material load are given and analyzed. The preliminary test results show that the solids distribution of the cold model with axis-symmetrically arrangement of cyclones can be measured in different bed inventories and superficial velocities. The measurement result provides valuable information for the scaling up a super-critical pressure circulating ftuidised bed with multi-cyclone separators.