Design, fabrication and preliminary testing of a laboratory- scale fluidized bed apparatus for solid-liquid system

Date

2011

Degree

Bachelor of Science in Chemical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Butch G. Bataller

Co-adviser

Jovita L. Movillon

Committee Member

Maria Cristina V. Mahilum

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Abstract

A laboratory-scale fluidized bed apparatus was designed and fabricated to demonstrate fludization. The set-up was exclusive for solid-liquid system. The set-up consisted of glass column, centrifugal pump, water tank, U-tube manometer, flowmeter and a by-pass. The set-up was subjected to preliminary testing. There were four fluidized materials that were considered in the study: soya beans, toy gun pellets, tapioca balls, and plastic beads. The fluidizing medium utilized was water. The manometer fluid that was used first is dishwashing liquid and dibutyl phthalate was used when it was already available. A rotameter was used as a flowmeter. The study aimed to relate bed height with fluid superficial velocity and pressure drop, and to relate pressure drop with fluid superficial velocity. It was observed that at very low flow rates, the bed height was unchanged. Minimum fluidizing velocity was observed when the bed started to expand. The actual minimum fluidizing velocities obtained were larger compared to the theoretical minimum fluidizing velocities. As the velocity was continuously increased, the bed height expanded until the bed of particles was swept out from the column. The corresponding velocities when the materials were swept out from the column were considered as terminal velocities. There was no evident relationship that was observed between bed height – pressure drop and velocity- pressure drop when the manometer fluid is dishwashing liquid. The actual relationship between bed height – pressure drop and velocity - pressure drop when dibutyl phthalate was considered as the manometer fluid shows analogous trend to the theoretical.

Language

English

LC Subject

Fabrication, Fluidized-bed combustion

Location

UPLB College of Engineering and Agro-Industrial Technology (CEAT)

Call Number

LG 993.5 2011 E62 C33

Document Type

Thesis

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