Applications of Fluidization to Food Processing by Peter G. Smith

By Peter G. Smith

Fluidization is a method that allows good debris to tackle a few of the homes of a fluid. regardless of being very wide-spread in the foodstuff processing undefined, knowing of this crucial process is frequently limited.

Applications of Fluidization to meals Processing units out the confirmed thought of fluidization and relates this to foodstuff processing functions, quite in:
* Drying
* Freezing
* Mixing
* Granulation
* Fermentation

This very important and thorough booklet, written by means of Peter Smith, who has a long time' event educating and studying in meals processing, is a necessary instrument and reference for foodstuff scientists and technologists, and engineers operating in the nutrients undefined. Libraries, and learn and improvement teams inside all universities and learn institutions the place foodstuff technology, foodstuff reports, meals know-how, physics and engineering are studied and taught must have copies of this beneficial e-book

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Extra resources for Applications of Fluidization to Food Processing

Example text

4 for a variety of (non-food) particles in the size range 60–600 mm; larger wake fractions have been observed with smaller particles but there is no clear relationship. Growth and shedding of the wake may be repeated several times in the life of a single bubble. 5 bubble diameters by a single rising bubble. Because of the large numbers of bubbles present in a fluidized bed, the particle mixing pattern is highly complex and extremely rapid. 8 Although this expression may not accurately predict circulation time, and in any case particles do not follow a simple predetermined circuit around the bed, it serves to illustrate the significance of the excess gas velocity in determining particle mixing rates.

In other words, when the gas exit is above the TDH the rate of solids loss is constant and therefore it is common to design the freeboard height to be equal to TDH. Other types of fluidization Spouted beds A spouted bed requires a cylindrical container with an inverted conical base and a vertical pipe entering at the apex of the cone. 19. Particles are carried at high velocity upwards in the central jet in a dilute phase and at the bed surface the particles form a kind of fountain and rain down onto the clearly defined surface.

Turbulent fluidization and fast fluidization As the superficial gas velocity is increased still further the two-phase bed structure, of a bubble or slug phase plus a dense phase, begins to break down and the bed is characterised by significant pressure fluctuations. The bed is now referred to as a turbulent bed where discrete bubbles or slugs are no longer present. There is far more particle ejection into the freeboard and a far less distinct interface between the dense-phase bed and the freeboard. The upper limit of turbulent fluidization is the point where particles are transported out of the column.

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