Analytical solution for steady and unsteady state particle size distribution in FBC and CFBC boilers for non-breaking char particles

Jaakko Saastamoinen (Corresponding Author), Antti Tourunen, Jouni Hämäläinen, T. Hyppänen, M. Loschkin, A. Kettunen

Research output: Contribution to journalArticleScientificpeer-review

11 Citations (Scopus)

Abstract

Continuous analytical solutions for the particle size distributions of char in steady and unsteady states in fluidized beds, when the inlet fuel feed is presented by monosize, lognormal, Rosin-Rammler or gamma distributions, are derived from a population balance model. The stationary size distribution is directly related to the rate of reduction of the particle size. Combustion and attrition reduce the particle size. Thus, it is possible to extract the dependence of the rate of reduction of radius (affected by a fuel’s reactivity and attrition) on radius from a measured steady-state particle size distribution. Unsteady particle size distributions are derived for impulse, step and square pulse changes in the fuel feed, when the oxygen level in the reactor is maintained constant.
Original languageEnglish
Pages (from-to)395-405
Number of pages11
JournalCombustion and Flame
Volume132
Issue number3
DOIs
Publication statusPublished - 2003
MoE publication typeA1 Journal article-refereed

Fingerprint

unsteady state
boilers
particle size distribution
Particle size analysis
Particles (particulate matter)
Boilers
comminution
Particle size
rosin
radii
Fluidized beds
impulses
beds
reactivity
reactors
Oxygen
oxygen
pulses

Keywords

  • particle size distribution
  • fluidized bed combustion
  • population balance modelling
  • char
  • particle size
  • emissions
  • emissions reduction

Cite this

Saastamoinen, Jaakko ; Tourunen, Antti ; Hämäläinen, Jouni ; Hyppänen, T. ; Loschkin, M. ; Kettunen, A. / Analytical solution for steady and unsteady state particle size distribution in FBC and CFBC boilers for non-breaking char particles. In: Combustion and Flame. 2003 ; Vol. 132, No. 3. pp. 395-405.
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abstract = "Continuous analytical solutions for the particle size distributions of char in steady and unsteady states in fluidized beds, when the inlet fuel feed is presented by monosize, lognormal, Rosin-Rammler or gamma distributions, are derived from a population balance model. The stationary size distribution is directly related to the rate of reduction of the particle size. Combustion and attrition reduce the particle size. Thus, it is possible to extract the dependence of the rate of reduction of radius (affected by a fuel’s reactivity and attrition) on radius from a measured steady-state particle size distribution. Unsteady particle size distributions are derived for impulse, step and square pulse changes in the fuel feed, when the oxygen level in the reactor is maintained constant.",
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Analytical solution for steady and unsteady state particle size distribution in FBC and CFBC boilers for non-breaking char particles. / Saastamoinen, Jaakko (Corresponding Author); Tourunen, Antti; Hämäläinen, Jouni; Hyppänen, T.; Loschkin, M.; Kettunen, A.

In: Combustion and Flame, Vol. 132, No. 3, 2003, p. 395-405.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Analytical solution for steady and unsteady state particle size distribution in FBC and CFBC boilers for non-breaking char particles

AU - Saastamoinen, Jaakko

AU - Tourunen, Antti

AU - Hämäläinen, Jouni

AU - Hyppänen, T.

AU - Loschkin, M.

AU - Kettunen, A.

N1 - Project code: C1SU00158

PY - 2003

Y1 - 2003

N2 - Continuous analytical solutions for the particle size distributions of char in steady and unsteady states in fluidized beds, when the inlet fuel feed is presented by monosize, lognormal, Rosin-Rammler or gamma distributions, are derived from a population balance model. The stationary size distribution is directly related to the rate of reduction of the particle size. Combustion and attrition reduce the particle size. Thus, it is possible to extract the dependence of the rate of reduction of radius (affected by a fuel’s reactivity and attrition) on radius from a measured steady-state particle size distribution. Unsteady particle size distributions are derived for impulse, step and square pulse changes in the fuel feed, when the oxygen level in the reactor is maintained constant.

AB - Continuous analytical solutions for the particle size distributions of char in steady and unsteady states in fluidized beds, when the inlet fuel feed is presented by monosize, lognormal, Rosin-Rammler or gamma distributions, are derived from a population balance model. The stationary size distribution is directly related to the rate of reduction of the particle size. Combustion and attrition reduce the particle size. Thus, it is possible to extract the dependence of the rate of reduction of radius (affected by a fuel’s reactivity and attrition) on radius from a measured steady-state particle size distribution. Unsteady particle size distributions are derived for impulse, step and square pulse changes in the fuel feed, when the oxygen level in the reactor is maintained constant.

KW - particle size distribution

KW - fluidized bed combustion

KW - population balance modelling

KW - char

KW - particle size

KW - emissions

KW - emissions reduction

U2 - 10.1016/S0010-2180(02)00485-6

DO - 10.1016/S0010-2180(02)00485-6

M3 - Article

VL - 132

SP - 395

EP - 405

JO - Combustion and Flame

JF - Combustion and Flame

SN - 0010-2180

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ER -