By Tadeusz Kudra

ISBN-10: 0824796187

ISBN-13: 9780824796181

Presents Drying Breakthroughs for an Array of Materials

Despite being one of many oldest, so much energy-intensive unit operations, business drying may be the least scrutinized approach on the microscopic point. but within the wake of today’s international strength predicament, drying study and improvement is at the upward thrust.

Following within the footsteps of the commonly learn first variation, Advanced Drying applied sciences, moment Edition is the direct final result of the new exceptional development in drying literature and new drying undefined. This variation offers an evaluative evaluate of latest and rising drying applied sciences, whereas putting better emphasis on making the drying procedure extra strength effective within the green age.

Draws at the Authors’ 60+ Years of mixed Experience

Fueled by means of the present strength situation and becoming purchaser call for for stronger caliber items, this completely up-to-date source addresses state of the art drying applied sciences for various fabrics equivalent to high-valued, heat-sensitive prescribed drugs, nutraceuticals, and a few meals. It additionally introduces cutting edge thoughts, similar to heat-pump drying of meals, which enable either commercial perform and examine and improvement tasks to avoid wasting strength, decrease carbon footprints, and hence increase the base line.

Four New Chapters:

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

Requiring no earlier wisdom of chemical engineering, this single-source reference may still help researchers in turning the laboratory curiosities of this present day into the innovative novel drying applied sciences of tomorrow.

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Extra resources for Advanced drying technologies

Sample text

The time from concept to market can be very long for some new technologies. It is well known that the concept of a helicopter appeared some 500 years before the first helicopter took to the air. The idea of using superheated steam as the drying medium was well publicized over 100 years ago, yet its real commercial potential was first realized only about 50 years ago and that too not fully. In fact, it is not fully understood even today. A recent example of this long gestation period is the Condebelt drying process for high basis weight (thick grades) paperboard proposed and developed by the late Dr.

1983). Because the overall drying rate depends on the rate of the component subprocesses, that is, on the drying of the wet layer on the individual particles and removal of the dry coat, the mathematical model for this process must 40 Chapter 4 adequately account for variables that affect both of these processes. It is generally recognized that drying on inert carriers is controlled by the external heat and mass transfer conditions. Even for materials with internal resistance to transfer processes, the operating conditions are chosen (thin layer and rapid evaporation at 100°C) so as to minimize this resistance (Kutsakova and Utkin, 1987).

The operating conditions are selected in such a way that the peeling-off starts below the air inlet so the powdery material is entrained only with the concurrent air stream. The flow of particles over the supporting grid along with the mechanical action of the screw conveyor facilitates abrasion of the dry coat so the particles transported by the screw conveyor are essentially free of the drying material. Unlike spouted and fluidized bed dryers, which require relatively smallsized inert particles, relatively large balls (18 to 40 mm in diameter) made of plastics are used as inert carriers in Ecal dryers.

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Advanced drying technologies by Tadeusz Kudra

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