Design optimization for low-nox coal-firing systems

E. Bar-Ziv, B. Chudnovsky, A. Talanker

Research output: Contribution to journalArticlepeer-review

Abstract

We report numerical results and measurements for a 575 MW pulverized coal tangential firing boiler of the Israel Electric Corporation (IEC). Measured and calculated values were found to be in reasonable agreement. We used simulations to optimize both the furnace flue gas temperature and the staged residence time for low-NOx and tested mass flow rates through close-coupled and separate over-fire air ports and the coal powder fineness. These parameters control the mixing rate of fuel and oxidizer streams and affect temperature regimes, coal burning rate, and nitrogen oxidation/reduction. From this effort, IEC started to improve boiler performance by replacing existing burners to low-NOx firing system to ensure the current regulation requirements of emission pollutions.

Original languageEnglish
Pages (from-to)93-104
Number of pages12
JournalClean Air
Volume7
Issue number2
DOIs
StatePublished - 1 Dec 2006

Keywords

  • Coal-fired boilers
  • Combustion optimization
  • NO

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