Steam drying -- Modeling and applications

Journal Article · Thu Aug 01 04:00:00 EDT 1996 · Drying Technology

DOI:https://doi.org/10.1080/07373939608917141· OSTI ID:260748

Wimmerstedt, R; Hager, J ^[1]

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1. Lund Univ. (Sweden). Dept. of Chemical Engineering 1

The concept of steam drying originates from the mid of the last century. However, a broad industrial acceptance of the technique has so far not taken place. The paper deals with modelling the steam drying process and applications of steam drying within certain industrial sectors where the technique has been deemed to have special opportunities. In the modelling section the mass and heat transfer processes are described along with equilibrium, capillarity and sorption phenomena occurring in porous materials during the steam drying process. In addition existing models in the literature are presented. The applications discussed involve drying of fuels with high moisture contents, cattle feed exemplified by sugar beet pulp, lumber, paper pulp, paper and sludges. Steam drying is compared to flue gas drying of biofuels prior to combustion in a boiler. With reference to a current installation in Sweden, the exergy losses, as manifested by loss of co-generation capacity, are discussed. The energy saving potential when using steam drying of sugar beet pulp as compared to other possible plant configurations is demonstrated. Mechanical vapor recompression applied to steam drying is analyzed with reference to reported data from industrial plants. Finally, environmental advantages when using steam drying are presented.

• Sponsoring Organization: USDOE
• OSTI ID: 260748
• Journal Information: Drying Technology, Journal Name: Drying Technology Journal Issue: 5 Vol. 14; ISSN DRTEDQ; ISSN 0737-3937
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
BIOMASS
DRYERS
DRYING
ENERGY CONSERVATION
ENVIRONMENTAL IMPACTS
HEAT TRANSFER
MASS TRANSFER
MATHEMATICAL MODELS
PROCESS HEAT
SOLID FUELS
STEAM
USES