By Tadeusz Kudra

ISBN-10: 0824796187

ISBN-13: 9780824796181

Presents Drying Breakthroughs for an Array of Materials

Despite being one of many oldest, such a lot energy-intensive unit operations, business drying might be the least scrutinized procedure on the microscopic point. but within the wake of today’s worldwide power drawback, drying examine and improvement is at the upward thrust.

Following within the footsteps of the generally learn first variation, Advanced Drying applied sciences, moment Edition is the direct end result of the new extra special progress in drying literature and new drying undefined. This variation presents an evaluative review of latest and rising drying applied sciences, whereas putting larger emphasis on making the drying strategy extra strength effective within the green age.

Draws at the Authors’ 60+ Years of mixed Experience

Fueled through the present power trouble and starting to be patron call for for more suitable caliber items, this completely up-to-date source addresses state of the art drying applied sciences for varied fabrics corresponding to high-valued, heat-sensitive prescription drugs, nutraceuticals, and a few meals. It additionally introduces leading edge concepts, equivalent to heat-pump drying of meals, which enable either business perform and study and improvement tasks to avoid wasting strength, lessen carbon footprints, and therefore enhance the base line.

Four New Chapters:

  • Spray-Freeze-Drying
  • Fry Drying
  • Refractance Window Drying
  • Mechanical Thermal Expression

Requiring no past wisdom of chemical engineering, this single-source reference should still help researchers in turning the laboratory curiosities of at the present time into the progressive novel drying applied sciences of tomorrow.

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Additional resources for Advanced drying technologies

Example text

1989). , pulp and paper sludge), which could bridge solid particles and therefore immobilize the bed, are also not good candidates for drying on inert particles. The bed can also collapse when drying sticky materials such as meat-rendering sludge with excessive fat content. In such a case, melted fat acts as a binder, which immobilizes particles and traps dry meat powder inside the dryer. This problem can be solved when altering the process by contact sorption drying (see Chapter 12). 5%, respectively (Amazouz and Benali, 2000).

During passage through the venturi tubes and air ducts, the inert particles are additionally heated by a hot-air stream so that the temperature of recycled inert particles is much higher than the bed temperature. Hence, evaporation of moisture from the wet coat is not only due to sensible heat of gas phase but also due to the sensible heat stored in the inert particles. 3. 8 Swirl-jet-spouted bed dryer. b. 9 Schematic of the Ecal dryer and temperature distribution along the bed height. ) 48 Chapter 4 veyor screw.

For example, in a system consisting of four mutually perpendicular ducts of the same diameter (the ‘‘X’’ configuration), the two primary gas streams mixed in an impingement zone are split into two secondary streams carrying the particles off the impingement zone. 5 shows the principle of semicircular impinging streams in which a primary gas stream is split equally into two secondary streams flowing inside two ducts bent to form semicircular channels. In this case, the flow of the drying material (and, to a smaller extent, the flow of the carrying gas) is affected by centrifugal forces, which might reduce the thickness of the boundary layer at the solid surface.

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Advanced drying technologies by Tadeusz Kudra

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