Handbook of Industrial Drying by Arun S. Mujumdar PDF

By Arun S. Mujumdar

By some distance the main ordinarily encountered and energy-intensive unit operation in just about all commercial sectors, commercial drying maintains to draw the curiosity of scientists, researchers, and engineers. The Handbook of commercial Drying, Fourth Edition not just gives you a entire remedy of the present state-of-the-art, but in addition serves as a consultative reference for streamlining commercial drying operations.

New to the Fourth Edition:

  • Computational fluid dynamic simulation
  • Solar, impingement, and pulse combustion drying
  • Drying of culmination, greens, sugar, biomass, and coal
  • Physicochemical elements of sludge drying
  • Life-cycle overview of drying systems

Covering as a rule encountered dryers in addition to leading edge dryers with destiny capability, the Handbook of business Drying, Fourth version not purely info the most recent advancements within the box, but additionally explains how advancements in dryer layout and operation can raise strength potency and cost-effectiveness.

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Extra info for Handbook of Industrial Drying

Example text

The defining criteria are as follows: (1) there is no pore space (evaporation can take place only at the surface); (2) all liquid is physically bound. It should be noted that such classifications are applicable only to homogeneous media that could be considered as continua for transport. As a wet solid is usually swollen compared with its condition when free of moisture and its volume changes during the drying process, it is not convenient to express moisture content in terms of volume. The moisture content of a solid is usually expressed as the moisture content by weight of bone-dry material in the solid, X.

If the partial pressure of the external atmosphere PW is nearly zero, then the equilibrium moisture inside the dry product will also be almost zero. Section A of the curve represents a region in which the monomolecular layers are formed, although there may be multimolecular layers in some places toward the end of A. Moisture content, X g H20/100 g dry solid 30 Molecular sieves (20°C) Section B is a transitional region in which double and multiple layers are mainly formed. Capillary condensation could also have taken place.

Most pharmaceuticals and fine chemicals require drying before packaging. Large turbo-tray and through circulation dryers are employed. Excessively heat-sensitive products, such as antibiotics and blood plasma, call for special treatment, like freeze drying or high vacuum tray drying. Continuous rotary dryers are usually used to handle large tonnages of natural ores, minerals, and heavy chemicals. The largest demand for drying equipment is for the continuous drying of paper, which is done on cylinder or ‘‘can’’ dryers.

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