Research Of Acoustic Emissions From Circulating Fluidized Beds

Acoustic emissions measurements, as a non-contact monitoring technology, attracted more and more attention in many fields. Its application was also expected to be feasible for CFB monitoring. This work focused on the characteristic of acoustic emissions from CFB. CFB cold model was set up and AE measurements were carried out on it. There was strong correlation between acoustic signals and fluidizing conditions. And by adding big particles into bed, agglomeration was simulated and AE signals were measured. It suggested that when big particle was formed, energy distribution of AE tended towards high frequency segments.