A cross-flow model for continuous plug flow fluidized-bed cross-flow dryers

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Plug flow fluidized bed cross-flow dryers have been used in drying of particulate solids such as paddy and other grains for many years. However, simulation of the performance of any particular design of the dryer has always been problematic due to the inadequate overall empirical models used that are too inflexible and too specific to the particular design. In addition, previous theoretical models of the plug flow fluidized bed cross-flow dryer did not model the gas cross flow properly and had difficulty in modeling the moving solid bed. A new steady-state cross-flow model of the dryer that models the gas cross-flow is proposed. The profiles for the solids and air moisture contents and temperatures were found to be dependent on the gas-solid flow ratio, G/F, the specific heat demand, CPY(TI - TA)/(YE - YI), the total number of a transfer units, NT = Gε/KøaSL and the specific drying load, (XI - XP)/ (YE - YI). The model was validated by comparing the simulated data with experimental data that were obtained by drying paddy in a plug flow fluidized bed cross-flow dryer pilot plant. The model was found to estimate very well the solids moisture content and temperature, the gas moisture content and temperature profiles, and the driving force profile.

Original languageEnglish
Pages (from-to)1229-1235
Number of pages7
JournalDrying Technology
Volume25
Issue number7-8
DOIs
Publication statusPublished - Jul 2007

Fingerprint

drying apparatus
cross flow
plugs
Fluidized beds
beds
Gases
drying
moisture content
Drying
Moisture
gases
profiles
solids flow
pilot plants
Flow of solids
Driers (materials)
Pilot plants
temperature profiles
Temperature
particulates

Keywords

  • Cross-flow dryers
  • Dryer modeling
  • Fluid bed dryer
  • Paddy drying

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)

Cite this

A cross-flow model for continuous plug flow fluidized-bed cross-flow dryers. / Ramli, Wan; Wan Daud, Wan Ramli.

In: Drying Technology, Vol. 25, No. 7-8, 07.2007, p. 1229-1235.

Research output: Contribution to journalArticle

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