Download Advanced drying technologies by Tadeusz Kudra PDF
By Tadeusz Kudra
Presents Drying Breakthroughs for an Array of Materials
Despite being one of many oldest, such a lot energy-intensive unit operations, business drying could be the least scrutinized method on the microscopic point. but within the wake of today’s worldwide power difficulty, drying examine and improvement is at the upward thrust.
Following within the footsteps of the commonly learn first version, Advanced Drying applied sciences, moment Edition is the direct consequence of the new extra special development in drying literature and new drying undefined. This version presents an evaluative review of recent and rising drying applied sciences, whereas putting better emphasis on making the drying method extra strength effective within the green age.
Draws at the Authors’ 60+ Years of mixed Experience
Fueled by means of the present strength predicament and growing to be shopper call for for superior 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 cutting edge strategies, reminiscent of heat-pump drying of meals, which permit either business perform and study and improvement tasks to avoid wasting strength, lessen carbon footprints, and therefore increase 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 should still help researchers in turning the laboratory curiosities of this day into the innovative novel drying applied sciences of tomorrow.
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Additional info for Advanced drying technologies
Example text
The calculated drying time varied from 60 to 90 seconds, whereas the experimentally determined material residence time was in the order of 200 to 400 seconds. This indicates that several wet coats were dried in this case before dry material was cracked and peeled off from the inert carrier (Kutsakova and Utkin, 1987). Despite extensive studies on drying on inert particles, there is practically no data on the material residence time except those cited here for a swirling bed of inert particles. 2).
Here, a cylindrical drying chamber is fitted with a twin set of oppositely directed stubs for tangential entry of the secondary air. A streamlined insert located in the center of the chamber creates velocity distribution with a maximum at the impingement plane from the two counterrotating streams of secondary air. A fraction of the inert particles (which are generally free of dry material entrained with the exhaust air) is picked up by a peripheral ring-type entry located just below the limiting grid and returned to the near-grid region where they are re-coated with a liquid feed.
Such technologies are more readily accepted by industry since the risk associated with the adoption of such technologies is generally minimal and the cost-to-benefit ratio is favorable. Often the new technologies are intelligent combinations of traditional technologies necessitated by changes in the marketplace. The following list illustrates the evolutionary developments that have occurred over the past five decades in two commonly used industrial dryers: rotary and flash dryers. Similar evolutionary development trends can be traced for most other dryer types as well.