ABSTRACT
204A multistage solid-liquid circulating fluidized bed (SLCFB) was constructed to accommodate both the steps of operation of loading (catalytic reaction, adsorption, etc.) and regeneration of solid phase simultaneously on a continuous mode. The loading and regeneration sections primarily consists of five glass stages (each 100 mm i.d. and 100 mm height) assembled together with flange joint. A stainless steel (SS) sieve plate of 5% opening and 2 mm hole size is fixed between the flanges. Each SS plate comprises at least one down- spout either located at the center or at the periphery of the stage, imparting the flow behavior of solid close to plug flow. The polymeric resins were used as solid phase and water as liquid phase, respectively. In this work, we have studied the effect of system (particle density and size of solid phase) and operating (superficial liquid velocity and solid circulation rate) parameters on pressure drop across the section. The results indicate that a modified cross flow stage configuration imparts a uniform fluidization, which in turn results into reduction in pressure drop as compared to SLCFBs studied so far.
