Experimental Investigation On Gas Fluidization of Solids In Stationary Liquid

Abstract

Two phase gas-solid fluidization and three phase gas-liquid-solid fluidization studies have been focused area of the researchers. There is intermittently reporting of studies in fluidization of solids in a stationary pool of liquid. These reported works are mostly related to the field of three phase batch fluidized bubble bed, fluidization of liquid saturated solids, solids batch bubble column. These researches are mainly focused on critical gas velocity and holdup studies. newlinePresent work is an experimental work for explaining the pressure drop, fluctuation ratio and expansion ratio during gas fluidization of solids in a stationary pool of liquid. newlineComplete research work has been divided into seven chapters. The first chapter deals with introduction and background of the present research as well as importance and need. In chapter two, review of research work already done in this field, has been discussed and subsequently research gap has been identified and then statement of problem has been defined as and#8213;to achieve the enhancement in the expansion of fluidized beds with increasing gas flow rates with a simultaneous reduction in fluctuation within the fluidized bed.and#8214; newlineChapter three deals with the description of experimental set-up and methodology. Standardization of the experimental set-up and procedure are also part of this chapter. Finally, uncertainty analysis has been done for estimating errors. newlineIn chapter four, pressure drop has been correlated with the investigating parameters. Chapter five gives information about fluctuation ratio studies in stationary liquid. Correlation of fluctuation ratio is in the form of a set of three equations. First correlation is for predicting maximum bed height (hmax), the second one is for predicting newlineii newlinethe minimum expanded bed height (hmin) and the last one is for fluctuation ratio. The sixth chapter deals with the expansion ratio of fluidized beds. Expansion ratio has been correlated with dimensionless groups of controlling parameters. Effect of increasing flow rate, solid bed hei