循环流化床锅炉风帽处压力信号的功率谱分析

Power Spectral Analysis of Pressure Signals Collected at Circulating Fluidized Bed Boiler Air Hood Areas

针对循环流化床锅炉内气固两相流动的复杂性,在冷态流化床试验台上测定并采集了风帽处的压力,利用功率谱分析的方法,对其能量在不同频率的分布进行了研究,找出了主频的范围,并阐明了流化床压力波动的原因。

Aiming at the complexity of gas-solid two-phase flow in Circulating Fluidized Bed boiler,cold-state experiments were performed on a fluidized bed test rig so as to collect pressure signals at air hood areas,of which the energy distribution in different frequency bands were studied via power spectral analysis,and hence the main frequency range found and corresponding causes of pressure fluctuation are explained.