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THE EFFECTIVENESS OF MULTI-STAGED SWIRLING FLUIDIZED BED

., S. FAUZAN ASHRI (2012) THE EFFECTIVENESS OF MULTI-STAGED SWIRLING FLUIDIZED BED. UNIVERSITI TEKNOLOGI PETRONAS, UNIVERSITI TEKNOLOGI PETRONAS. (Unpublished)

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Abstract

Fluidization is defined as an operation through which fine solids are transformed into a fluid like state through contact with either a gas or a liquid. Circulating fluidized beds are used mostly in the chemical process industry, mineral processing, pharmaceutical production, energy related processes and catalysts process in the petroleum industry and also for drying. Although it has been investigated by many researchers, a good understanding in the effects of different design parameters on it is yet to be established. In fluidized bed processes, the effectiveness of fluidization process is necessary as it determines how much energy or power required by means of improvement in residence time distribution and bed pressure drop. The aim of the project is to combine multistaging with counter-flow operation in the novel Swirling Fluidized Bed. In this study, the experiments were conducted utilizing one bed particle shape and size (spherical plastic beads with a diameter, dp = 2.99mm), with four different bed weights (500 g, 1000 g, 1500 g and 2000 g) as well as with various distributor blade overlap angles (9°, 12° and 15°) at constant blade inclination of 10°. The experimental set up has two stages and it has been tested and to work properly. A particular set of variables that include bed weight and blade overlap angle were set to analyze the results of two-staged swirling fluidized bed. During hydrodynamics study, it was found that the bed pressure drop ΔPb for both stages increases with superficial velocity and bed weight. Moreover, a distributor with 15° blade overlap angle showed the lowest pressure drop when compared to 12° and 9°. The experimental results of solid residence time distribution have shown that as the bed weight increases, the area under the tail of curve increases and it shifts the peak of the distribution towards the higher value of (moving the curve to the right) with the value of dimensionless age distribution E( ) reduce. Concurrently, the blade overlap angle affects the value of E( ) with no significant change on the value of . Thus, the experiment set up is shown to be highly versatile and capable of representing widely different conditions depending on the variables from the parameters.

Item Type: Final Year Project
Academic Subject : Academic Department - Mechanical Engineering - Materials - Engineering materials - Polymers - Flow simulation
Subject: T Technology > TJ Mechanical engineering and machinery
Divisions: Engineering > Mechanical
Depositing User: Sharifah Fahimah Saiyed Yoep
Date Deposited: 01 Apr 2013 11:33
Last Modified: 25 Jan 2017 09:39
URI: http://utpedia.utp.edu.my/id/eprint/6242

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