411-303 Fluids/Solids Processing

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Objectives:

Upon completion of this unit the students will:

• have an appreciation of small particle statistics and the flow behaviour of particulate systems;

• be familiar with the unit operations of comminution, crystallisation and the operation of packed and fluidised beds.

Content:

Small particle statistics, shape factors, types of mean size and distribution, principles of size measurement. Mixing solids, random mix, mixing index, mixing rate. Voidage of mixtures. Screening and separation efficiency. Change of size, comminution, granulation, crystallisation. Fluid-particle dynamics, free settling terminal velocity, simple cyclone design, equi-settling particles. Change of velocity, fluid impulse, jigging and tabling. Change of mass. Electrostatic precipitation.

Flow through packed beds, pressure drop, dead-end filtration. Fluidisation, minimum fluidising velocity, bed expansion, distribution design. Dynamics of gas and liquid fluidised beds.

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