Development of DEM–CFD simulation of combustion flow in incinerator with the representative particle model

Kenya Kuwagi, Toshihiro Takami, Azri Bin Alias, Degang Rong, Hiroshi Takeda, Shinichiro Yanase, Toshinori Kouchi, Toru Hyakutake, Kaoru Yokoyama, Yoshiyuki Ohara, Nobuo Takahashi, Noritake Sugitsue

Abstract

A simulation code based on the discrete element method (DEM) and computational fluid dynamics (CFD) coupling model was developed to simulate the behavior of radioactive cesium in waste incinerators. The waste lump was represented by particles in the simulation. The energy equation for a mixed gas, diffusion equation for each gas component, as well as the energy, drying, pyrolysis, and combustion equations for each particle were solved in the simulation by adding a combustion model to the standard DEM–CFD coupling model. The particle size of the waste changed as drying, pyrolysis, and combustion progressed. At the end of the combustion process, particle waste became ash, and the number of ash particles was enormous. To avoid an excessive computational load due to the high particle number, a similar assembly model was adopted to reduce the particle number in the calculation. There was a good agreement between the simulation and experimental results for the temperature at the outlet of the furnace and the flue gas composition.

Original languageEnglish
Pages (from-to)425-434
Number of pages10
JournalJournal of Chemical Engineering of Japan
Volume49
Issue number5
DOIs
StatePublished - 2016

Fingerprint

Finite difference method
Computational fluid dynamics
Ashes
Refuse incinerators
Drying
Pyrolysis
Diffusion in gases
Cesium
Flue gases
Furnaces
Particle size
Computer simulation
Chemical analysis
Gases
Temperature

Keywords

  • Combustion
  • DEM–CFD simulation
  • Incinerator
  • Waste

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Kuwagi, K., Takami, T., Bin Alias, A., Rong, D., Takeda, H., Yanase, S., ... Sugitsue, N. (2016). Development of DEM–CFD simulation of combustion flow in incinerator with the representative particle model. Journal of Chemical Engineering of Japan, 49(5), 425-434. DOI: 10.1252/jcej.15we099

Development of DEM–CFD simulation of combustion flow in incinerator with the representative particle model. / Kuwagi, Kenya; Takami, Toshihiro; Bin Alias, Azri; Rong, Degang; Takeda, Hiroshi; Yanase, Shinichiro; Kouchi, Toshinori; Hyakutake, Toru; Yokoyama, Kaoru; Ohara, Yoshiyuki; Takahashi, Nobuo; Sugitsue, Noritake.

In: Journal of Chemical Engineering of Japan, Vol. 49, No. 5, 2016, p. 425-434.

Research output: Contribution to journalArticle

Kuwagi, K, Takami, T, Bin Alias, A, Rong, D, Takeda, H, Yanase, S, Kouchi, T, Hyakutake, T, Yokoyama, K, Ohara, Y, Takahashi, N & Sugitsue, N 2016, 'Development of DEM–CFD simulation of combustion flow in incinerator with the representative particle model' Journal of Chemical Engineering of Japan, vol 49, no. 5, pp. 425-434. DOI: 10.1252/jcej.15we099
Kuwagi K, Takami T, Bin Alias A, Rong D, Takeda H, Yanase S et al. Development of DEM–CFD simulation of combustion flow in incinerator with the representative particle model. Journal of Chemical Engineering of Japan. 2016;49(5):425-434. Available from, DOI: 10.1252/jcej.15we099

Kuwagi, Kenya; Takami, Toshihiro; Bin Alias, Azri; Rong, Degang; Takeda, Hiroshi; Yanase, Shinichiro; Kouchi, Toshinori; Hyakutake, Toru; Yokoyama, Kaoru; Ohara, Yoshiyuki; Takahashi, Nobuo; Sugitsue, Noritake / Development of DEM–CFD simulation of combustion flow in incinerator with the representative particle model.

In: Journal of Chemical Engineering of Japan, Vol. 49, No. 5, 2016, p. 425-434.

Research output: Contribution to journalArticle

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AB - A simulation code based on the discrete element method (DEM) and computational fluid dynamics (CFD) coupling model was developed to simulate the behavior of radioactive cesium in waste incinerators. The waste lump was represented by particles in the simulation. The energy equation for a mixed gas, diffusion equation for each gas component, as well as the energy, drying, pyrolysis, and combustion equations for each particle were solved in the simulation by adding a combustion model to the standard DEM–CFD coupling model. The particle size of the waste changed as drying, pyrolysis, and combustion progressed. At the end of the combustion process, particle waste became ash, and the number of ash particles was enormous. To avoid an excessive computational load due to the high particle number, a similar assembly model was adopted to reduce the particle number in the calculation. There was a good agreement between the simulation and experimental results for the temperature at the outlet of the furnace and the flue gas composition.

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