Characterization of Pressure Signals in Fluidized Beds Loaded with Large Particles Using Wigner Distribution Analysis： Feasibility of Diagnosis of Agglomeration

• Published in: Chinese journal of chemical engineering Vol. 15; no. 1; pp. 24 - 29
• Main Author: 张建胜 吕俊复 王昕 张海 岳光溪 SUDA Toshiyuki SATO Junichi
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-02-2007
• Subjects: agglomeration; bubbling fluidized bed; pressure fluctuation; Wigner distribution; Wigner分布; 压力波动信号; 大颗粒; 沸腾流化床; pressure fluctuation; agglomeration; bubbling fluidized bed; Wigner distribution
• ISSN: 1004-9541; 2210-321X
• DOI: 10.1016/S1004-9541(07)60029-9

An experimental verification is reported on the early predicting index of agglomeration in bubbling fluidized bed. Coarse quartz sand, which has the same density but larger diameter than the bed material, was used to simulate the initial agglomerated particle. Wigner distribution was used to analyze the pressure fuctuation of the tested bed, and the average amplitude of local domain frequency （LDF） and local peak weighted average frequency （LPWA） under different operating conditions were measured and compared. The results showed that the LDF is sensitive to the agglomeration phenomena and had quick response to the incipient agglomeration in fluidized beds. It can be concluded from the results that these two parameters could be taken as the characteristic indexes to the agglomeration in fuidized beds.