Ho-Jung Ryu and Seung-Yong Lee and Young Cheol Park and Moon-Hee Park
Solid Circulation Rate and Gas Leakage Measurements in an Interconnected Bubbling Fluidized Beds
35 - 40
2007
1
4
International Journal of Energy and Power Engineering
https://publications.waset.org/pdf/10226
https://publications.waset.org/vol/4
World Academy of Science, Engineering and Technology
Twointerconnected fluidized bed systems are widely used in various processes such as FisherTropsch, hot gas desulfurization, CO2 captureregeneration with dry sorbent, chemicallooping combustion, sorption enhanced steam methane reforming, chemicallooping hydrogen generation system, and so on. However, most of twointerconnected fluidized beds systems require riser andor pneumatic transport line for solid conveying and loopseals or sealpots for gas sealing, recirculation of solids to the riser, and maintaining of pressure balance. The riser (transport bed) is operated at the high velocity fluidization condition and residence times of gas and solid in the riser are very short. If the reaction rate of catalyst or sorbent is slow, the riser can not ensure sufficient contact time between gas and solid and we have to use two bubbling beds for each reaction to ensure sufficient contact time. In this case, additional riser must be installed for solid circulation. Consequently, conventional twointerconnected fluidized bed systems are very complex, large, and difficult to operate. To solve these problems, a novel twointerconnected fluidized bed system has been developed. This system has two bubbling beds, solid injection nozzles, solid conveying lines, and downcomers. In this study, effects of operating variables on solid circulation rate, gas leakage between two beds have been investigated in a cold mode twointerconnected fluidized bed system. Moreover, longterm operation of continuous solid circulation up to 60 hours has been performed to check feasibility of stable operation.
Open Science Index 4, 2007