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Title: Three-dimensional simulation of the pulverized coal combustion inside blast furnace tuyere

Journal Article · · Applied Mathematical Modelling
 [1];  [2];  [3];  [4];  [4];  [5]
  1. Anhui Univ. of Technology, Maanshan (China); Purdue Univ., Calumet, IN (United States)
  2. Anhui Univ. of Technology, Maanshan (China)
  3. Shanghai Jiaotong Univ., Shanghai (China)
  4. Mittal Steel Co., East Chicago, IN (United States)
  5. Purdue Univ., Calumet, IN (United States)
+ Show Author Affiliations

Here, a three-dimensional multi-phase model using Eulerian approach has been developed to simulate the coal heat transfer, devolatilization and combustion process inside a blast furnace tuyere. The information including velocity field, temperature distribution and combustion characteristics has been obtained in details and the effect of coal particle diameter, coal type and coal injection angle on the pulverized coal combustion process has been presented. The predicted results show that the coal combustion process inside tuyere are affected by coal particle size, coal type and coal injection angle. For the smaller coal particle diameter, the volatile matter released from the coal more rapidly, this results in a higher coal burnout at the exit of the tuyere. The coal burnout is depended on the coal volatile matter content; a higher coal burnout will be obtained for the coal with a higher volatile matter content. Furthermore, the coal injection angle affects the flow patter inside the tuyere, which results in a different mixing and burning process of the pulverized coal. When the coal diameter changes from 30 μm to 90 μm, the coal burnout decreases from 51.03% to 44.21%; when the coal volatile matter is reduced from 34.32% to 19.95%, the coal burnout decreases from 46.04% to 35.02% and for the coal injection with an angle, the coal burnout is 46.04%, a little bit higher than that of 44.51% without injection angle.

Research Organization:
Purdue Univ., West Lafayette, IN (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
DOE Contract Number:
NA0000741
OSTI ID:
1344378
Journal Information:
Applied Mathematical Modelling, Vol. 34, Issue 11; ISSN 0307-904X
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

References (11)

Integrated Mathematical Model of Pulverised Coal Combustion in a Blast Furnance. journal January 1997
Three-dimensional Simulation of Flow and Combustion for Pulverised Coal Injection journal January 2005
Simulation of Transport Phenomena around Raceway Zone in the Lower Part of Blast Furnace journal January 1992
Numerical studies of pulverized coal combustion in a tubular coal combustor with slanted oxygen jet☆ journal May 2003
Numerical analysis for the multi-phase flow of pulverized coal injection inside blast furnace tuyere journal September 2005
Two-Dimensional Voidage Waves in Fluidized Beds journal February 1999
Interactive processes in gasification and combustion—II. Isolated carbon, coal and porous char particles journal January 1993
Numerical prediction and practical improvement of pulverized coal combustion in blast furnace journal March 2006
Rapid devolatilization of pulverized coal in hot combustion gases journal January 1977
Premixed burning in diffusion flames—the flame zone model of libby and economos journal May 1979
Simulation of coal combustion by AUSM turbulence-chemistry char combustion model and a full two-fluid model journal October 2005

Figures / Tables (14)

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32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
blast furnace
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tuyere
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