Computation of steady state thermochemistry in rotary kilns: Application to the cement clinker manufacturing process

Vincent Meyer, Alexander Pisch, Karri Penttilä, Pertti Koukkari

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)

Abstract

Advanced Gibbs free energy minimization was applied for modeling physical and chemical processes in various industrial rotary kilns. The method is the core of a generic computer program (KilnSimu), used to simulate kiln operations with different multiphase chemistries. KilnSimu combines iterative solution of the balance equations coupled with the Gibbs energy calculation of the kiln thermochemistry, thus providing a detailed quantitative analysis of the chemical and phase transformations as well as of mass and heat flows inside the kiln. Adding reaction rate constraints into the Gibbs energy procedure allows for the necessary reaction kinetics in the simulation. The calculation results are typically given as 1-dimensional steady state axial profiles in the longitudinal direction of the kiln. The presented model was applied to an industrial problem in cement clinker manufacturing. The impact of pure oxygen addition at the main burner on the specific heat consumption of the full process was evaluated.

Original languageEnglish
Pages (from-to)335-347
Number of pages13
JournalChemical Engineering Research and Design
Volume115
DOIs
Publication statusPublished - 1 Nov 2016
MoE publication typeA1 Journal article-refereed

Fingerprint

Thermochemistry
Rotary kilns
Kilns
Cements
Gibbs free energy
Fuel burners
Reaction kinetics
Reaction rates
Specific heat
Computer program listings
Phase transitions
Oxygen
Heat transfer
Chemical analysis

Keywords

  • Cement clinkering
  • Gibbs energy minimization
  • Reaction rate constraint
  • Rotary kiln
  • Simulation
  • Steady state

Cite this

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title = "Computation of steady state thermochemistry in rotary kilns: Application to the cement clinker manufacturing process",
abstract = "Advanced Gibbs free energy minimization was applied for modeling physical and chemical processes in various industrial rotary kilns. The method is the core of a generic computer program (KilnSimu), used to simulate kiln operations with different multiphase chemistries. KilnSimu combines iterative solution of the balance equations coupled with the Gibbs energy calculation of the kiln thermochemistry, thus providing a detailed quantitative analysis of the chemical and phase transformations as well as of mass and heat flows inside the kiln. Adding reaction rate constraints into the Gibbs energy procedure allows for the necessary reaction kinetics in the simulation. The calculation results are typically given as 1-dimensional steady state axial profiles in the longitudinal direction of the kiln. The presented model was applied to an industrial problem in cement clinker manufacturing. The impact of pure oxygen addition at the main burner on the specific heat consumption of the full process was evaluated.",
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author = "Vincent Meyer and Alexander Pisch and Karri Penttil{\"a} and Pertti Koukkari",
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Computation of steady state thermochemistry in rotary kilns : Application to the cement clinker manufacturing process. / Meyer, Vincent; Pisch, Alexander; Penttilä, Karri; Koukkari, Pertti.

In: Chemical Engineering Research and Design, Vol. 115, 01.11.2016, p. 335-347.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Computation of steady state thermochemistry in rotary kilns

T2 - Application to the cement clinker manufacturing process

AU - Meyer, Vincent

AU - Pisch, Alexander

AU - Penttilä, Karri

AU - Koukkari, Pertti

PY - 2016/11/1

Y1 - 2016/11/1

N2 - Advanced Gibbs free energy minimization was applied for modeling physical and chemical processes in various industrial rotary kilns. The method is the core of a generic computer program (KilnSimu), used to simulate kiln operations with different multiphase chemistries. KilnSimu combines iterative solution of the balance equations coupled with the Gibbs energy calculation of the kiln thermochemistry, thus providing a detailed quantitative analysis of the chemical and phase transformations as well as of mass and heat flows inside the kiln. Adding reaction rate constraints into the Gibbs energy procedure allows for the necessary reaction kinetics in the simulation. The calculation results are typically given as 1-dimensional steady state axial profiles in the longitudinal direction of the kiln. The presented model was applied to an industrial problem in cement clinker manufacturing. The impact of pure oxygen addition at the main burner on the specific heat consumption of the full process was evaluated.

AB - Advanced Gibbs free energy minimization was applied for modeling physical and chemical processes in various industrial rotary kilns. The method is the core of a generic computer program (KilnSimu), used to simulate kiln operations with different multiphase chemistries. KilnSimu combines iterative solution of the balance equations coupled with the Gibbs energy calculation of the kiln thermochemistry, thus providing a detailed quantitative analysis of the chemical and phase transformations as well as of mass and heat flows inside the kiln. Adding reaction rate constraints into the Gibbs energy procedure allows for the necessary reaction kinetics in the simulation. The calculation results are typically given as 1-dimensional steady state axial profiles in the longitudinal direction of the kiln. The presented model was applied to an industrial problem in cement clinker manufacturing. The impact of pure oxygen addition at the main burner on the specific heat consumption of the full process was evaluated.

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KW - Gibbs energy minimization

KW - Reaction rate constraint

KW - Rotary kiln

KW - Simulation

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