Studying Hydrodynamics Behaviour in a Fluidized Bed

• Main Author: Hassan, Luqman Hakim
• Format: Final Year Project
• Language: English
• Published: Universiti Teknologi PETRONAS 2011
• Subjects: TP Chemical technology
• Online Access: http://utpedia.utp.edu.my/10386/1/2011%20-%20Studying%20Hydrodynamics%20Behaviour%20in%20a%20Fluidized%20Bed.pdf; http://utpedia.utp.edu.my/10386/

An experimental investigation has been performed, studying hydrodynamics behaviour of two-dimensional bubbling in a gas-solid fluidized bed with a CCD high speed camera. The main focus for analysing on the influence of varies pressure and particle size towards the bubble diameter bubble density, bed expansion and bubble rising velocity. A method has been implemented to verify that the image recording scheme yielded reproducible time-averaged flow patterns. The high speed camera with a speed up to 3,000 frames per second was placed in front of the rectangular column to observe the hydrodynamics behaviour. Image analysis software was used to analyse the image that allows determination of bubble characteristics. Bubble diameter will increase with height above air distributor until it reaches maximum bubble height, h*, beyond which bubbles do not grow further and become unstable and break up. The maximum bubble height, h* is a minor effect on differential particle size and pressure. Bubble density increase with particle size at low pressure and decrease with particle size at high pressure. The bed expansion increases with pressure and decrease with particle size.