Drum dryers

Research output: Chapter in Book/Report/Conference proceedingChapter

2 Citations (Scopus)

Abstract

The drum dryer is commonly used to dry viscous, concentrated solutions, slurries or pastes on rotating steam-heated drums.1,2 It can also be used to dry concentrated solutions or slurries that become more viscous or pasty because of flashing or boiling off of moisture or of irreversible thermochemical transformations of their content that occur on their rst contact with the hot drum surface.3-5 The viscous slurry or paste is mechanically spread by the spreading action of two counter-rotating drums into a thin sheet that adheres on the hotter drum in single drum dryers or split sheets on both hot cylinders in double drum dryers. The adhering thin sheet of paste is then rapidly dried conductively by the high heat flux of the condensing steam inside the drum. For very wet slurries that produce wet sheets, the drying of the wet thin sheet can be further enhanced by blowing hot dry air on the sheet surface. The thin sheet containing heat-sensitive materials, such as vitamins, can also be dried at a lower temperature in a vacuum.

Original languageEnglish
Title of host publicationHandbook of Industrial Drying, Fourth Edition
PublisherCRC Press
Pages249-258
Number of pages10
ISBN (Electronic)9781466596665
ISBN (Print)9781466596658
DOIs
Publication statusPublished - 1 Jan 2014

Fingerprint

drums (equipment)
Slurries
dryers
Ointments
Steam
Hot Temperature
slurries
Vitamins
Vacuum
Blow molding
Boiling liquids
Heat flux
Drying
steam
Moisture
Air
Temperature
heat
boiling
vitamins

ASJC Scopus subject areas

  • Engineering(all)
  • Agricultural and Biological Sciences(all)
  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Wan Daud, W. R. (2014). Drum dryers. In Handbook of Industrial Drying, Fourth Edition (pp. 249-258). CRC Press. https://doi.org/10.1201/b17208

Drum dryers. / Wan Daud, Wan Ramli.

Handbook of Industrial Drying, Fourth Edition. CRC Press, 2014. p. 249-258.

Research output: Chapter in Book/Report/Conference proceedingChapter

Wan Daud, WR 2014, Drum dryers. in Handbook of Industrial Drying, Fourth Edition. CRC Press, pp. 249-258. https://doi.org/10.1201/b17208
Wan Daud WR. Drum dryers. In Handbook of Industrial Drying, Fourth Edition. CRC Press. 2014. p. 249-258 https://doi.org/10.1201/b17208
Wan Daud, Wan Ramli. / Drum dryers. Handbook of Industrial Drying, Fourth Edition. CRC Press, 2014. pp. 249-258
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