An approximate theory for stresses in dust cake of ceramic candle filters

Jiri Smid, Yau Pin Chyou, Shu San Hsiau

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

A simplified theory is developed that yields the approximate stresses within a dust cake on the outer surface of ceramic candle filter and gives the critical factors which ensure complete detachment of cake. The radial and tangential stresses in cake during filtration have been derived by consideration of active state of stress in the dust cake. Back pulses of cleaning gas expand dust cake on the condition, that their power is just adequate to properties of cake, such as angle of internal friction and cohesion. Expansion of the dust cake induces tension cracks and disintegration of the cake. Back pulses of higher values hamper expansion of cake and cause "patchy" cleaning.

Original languageEnglish
Pages (from-to)288-297
Number of pages10
JournalPowder Technology
Volume203
Issue number2
DOIs
StatePublished - Nov 2010

Keywords

  • Ceramic candle filter
  • Dust
  • Dust cake detachment
  • Filtration
  • Gas cleaning

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