Numerical predictions of burner performance during pulverized coal combustion

Vlad Zarnescu, Sarma V. Pisupati

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations

Abstract

The performance of four burners in terms of temperature and velocity profiles, residence time and NOx emissions was predicted using numerical simulations and a two-dimensional model for pulverized coal combustion. Numerical predictions for two burners used in a pilot-scale 0.5 MM Btu/hr (146.5 kW) Down-fired combustor (DFC) are presented. Two other burner configurations were evaluated and compared with the ones used with the DFC for attaining lower NOx levels. Simulations were conducted for both coal and coal-water slurry as primary fuels. A sensitivity analysis of predictions with respect to variations of the model parameters was performed. The results suggest that the higher NOx reduction with one of the burners used in the DFC is due to the improved near-burner aerodynamics and to better flame attachment. These improved conditions are influenced by a combination of geometric and flow parameters, such as burner dimensions, quarl diameter, inlet velocity, inlet temperature and swirl number.

Original languageEnglish (US)
Pages245-253
Number of pages9
StatePublished - Dec 1 1999
EventThe 1999 International Joint Power Generation Conference and ICOPE'99 - Burlingame, CA, USA
Duration: Jul 25 1999Jul 28 1999

Other

OtherThe 1999 International Joint Power Generation Conference and ICOPE'99
CityBurlingame, CA, USA
Period7/25/997/28/99

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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