Advanced drying technologies by Tadeusz Kudra

By Tadeusz Kudra

Presents Drying Breakthroughs for an Array of Materials

Despite being one of many oldest, so much energy-intensive unit operations, commercial drying is likely to be the least scrutinized procedure on the microscopic point. but within the wake of today’s international strength problem, drying examine and improvement is at the upward push.

Following within the footsteps of the generally learn first version, Advanced Drying applied sciences, moment Edition is the direct consequence of the new extraordinary development in drying literature and new drying undefined. This version offers an evaluative assessment of recent and rising drying applied sciences, whereas putting higher emphasis on making the drying method extra strength effective within the green age.

Draws at the Authors’ 60+ Years of mixed Experience

Fueled by way of the present strength problem and growing to be patron call for for greater caliber items, this completely up-to-date source addresses state-of-the-art drying applied sciences for varied fabrics equivalent to high-valued, heat-sensitive prescription drugs, nutraceuticals, and a few meals. It additionally introduces leading edge strategies, similar to heat-pump drying of meals, which permit either business perform and learn and improvement tasks to save lots of power, lessen carbon footprints, and hence enhance the base line.

Four New Chapters:

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

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

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1998) report on fluid bed temperatures lower by 15°C than the temperature of the outlet air. 1) where R ϭ 462 J/(kgK) is the gas constant for water vapor, P s and P g are the water vapor pressure at the material surface and in the gas core, respectively, and ϕ is the parameter that quantifies distribution of the wet coat on the surface of inert particles given by the mass of wet material that adheres to the unit surface area of inert particles. 2) To calculate drying time, one should first identify the variation of the water vapor pressure at the material surface with the average temperature of inert particles and material moisture content.

Most have found commercial application for selected products in some countries. , superheated steam drying, drying of suspensions on inert particles, heat pump drying, etc. With greater awareness and industrial interest, several of these will become common technologies within the next decade or two. 1 INTRODUCTION Drying of liquid materials on inert solid carriers is a relatively new commercial technology to produce powders from solutions, suspensions, slurries, and pastes. , 1968, Anon, 1992a), it was not widespread, mostly because of the language barrier.

Because of such an oscillatory motion with progressively decreasing amplitude, the residence time of a single particle (of large inertia) in the impingement zone is longer than that of the gas stream. This residence time may be reduced for a multiplicity of particles because of interparticle collisions that lead to enhanced energy dissipation. Although it is possible to feed solids to both gas streams, the rate of particle collision and the resulting loss of momentum are much higher than that for a single stream feed, because particles that do experience nonelastic collisions greatly lose their momentum and are driven out of the system.

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