Model Research of Gas Emissions From Lignite and Biomass Co-Combustion in a Large Scale CFB Boiler

• Authors: Jarosław Krzywański , Rafał Rajczyk , Wojciech Nowak
• Languages of publication: EN

Abstracts

EN

The paper is focused on the idea of a combustion modelling of a large-scale circulating fluidised bed boiler (CFB) during coal and biomass co-combustion. Numerical computation results for three solid biomass fuels co-combustion with lignite are presented in the paper. The results of the calculation showed that in previously established kinetics equations for coal combustion, some reactions had to be modified as the combustion conditions changed with the fuel blend composition. Obtained CO2, CO, SO2 and NOx emissions are located in borders of ± 20% in the relationship to the experimental data. Experimental data was obtained for forest biomass, sunflower husk, willow and lignite cocombustion tests carried out on the atmospheric 261 MWe COMPACT CFB boiler operated in PGE Turow Power Station in Poland. The energy fraction of biomass in fuel blend was: 7%wt, 10%wt and 15%wt. The measured emissions of CO, SO2 and NOx (i.e. NO + NO2) were also shown in the paper. For all types of biomass added to the fuel blends the emission of the gaseous pollutants was lower than that for coal combustion.

Keywords

EN

biomass; circulating fluidised bed; co-combustion; lignite; modelling

• Publisher: De Gruyter Open
• Journal: Chemical and Process Engineering
• Year: 2014
• Volume: 35
• Issue: 2
• Pages: 217-231

Dates

published

1 - 6 - 2014

online

10 - 7 - 2014

received

16 - 10 - 2013

revised

17 - 2 - 2014

accepted

20 - 3 - 2014

Contributors

author

Jarosław Krzywański

• Czestochowa University of Technology, Institute of Advanced Energy Technologies, Dąbrowskiego 73, 42-201 Czestochowa, Poland

author

Rafał Rajczyk

• Czestochowa University of Technology, Institute of Advanced Energy Technologies, Dąbrowskiego 73, 42-201 Czestochowa, Poland

author

Wojciech Nowak

• AGH University of Science and Technology, Krakow, Poland

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Identifiers

DOI

10.2478/cpe-2014-0017