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research-article

The impact of pre-dried lignite co-firing with hard coal in an industrial scale PC boiler

[+] Author and Article Information
Halina Pawlak-Kruczek

Wroclaw University of Science and Technology, Faculty of Mechanical and Power Engineering, Dapartment of Boilers, Combustion and Energy Processes, 27 Wybrzeze Wyspianskiego, 50-370 Wroclaw, Poland
halina.pawlak@pwr.edu.pl

Robert Lewtak

Institute of Power Engineering, Department of Thermal Processes, Augustowka 36, 02-981 Warsaw, Poland
robert.lewtak@ien.com.pl

Zbigniew Plutecki

Opole University of Technology, Faculty of Production Engineering and Logistics, ul. Ozimska 75, 45-370 Opole, Poland
z.plutecki@po.opole.pl

Marcin Baranowski

Wroclaw University of Science and Technology, Faculty of Mechanical and Power Engineering, Dapartment of Boilers, Combustion and Energy Processes, 27 Wybrzeze Wyspianskiego, 50-370 Wroclaw, Poland
marcin.baranowski@pwr.edu.pl

Michal Ostrycharczyk

Wroclaw University of Science and Technology, Faculty of Mechanical and Power Engineering, Dapartment of Boilers, Combustion and Energy Processes, 27 Wybrzeze Wyspianskiego, 50-370 Wroclaw, Poland
michal.ostrycharczyk@pwr.edu.pl

Krystian Krochmalny

Wroclaw University of Science and Technology, Faculty of Mechanical and Power Engineering, Dapartment of Boilers, Combustion and Energy Processes, 27 Wybrzeze Wyspianskiego, 50-370 Wroclaw, Poland
krystian.krochmalny@pwr.edu.pl

Michal Czerep

Wroclaw University of Science and Technology, Faculty of Mechanical and Power Engineering, Dapartment of Boilers, Combustion and Energy Processes, 27 Wybrzeze Wyspianskiego, 50-370 Wroclaw, Poland
michal.czerep@pwr.edu.pl

Jacek Zgora

Wroclaw University of Science and Technology, Faculty of Mechanical and Power Engineering, Dapartment of Boilers, Combustion and Energy Processes, 27 Wybrzeze Wyspianskiego, 50-370 Wroclaw, Poland
jacek.zgora@pwr.edu.pl

Lukasz Niedzwiecki

Wroclaw University of Science and Technology, Faculty of Mechanical and Power Engineering, Dapartment of Boilers, Combustion and Energy Processes, 27 Wybrzeze Wyspianskiego, 50-370 Wroclaw, Poland
lukasz.niedzwiecki@pwr.edu.pl

1Corresponding author.

ASME doi:10.1115/1.4039907 History: Received August 15, 2017; Revised March 30, 2018

Abstract

The paper presents the experimental and numerical study on the behavior and performance of an industrial scale boiler during combustion of pulverized bituminous coal with various shares of pre-dried lignite. The experimental measurements were carried out on a boiler WP120 located in CHP Opole, Poland. Tests on the boiler were performed during low load operation and the lignite share reached up to 36% by mass. The pre-dried lignite, kept in dedicated separate bunkers, was mixed with bituminous coal just before the coal mills. CFD simulation of a co-firing scenario of lignite with hard coal was also performed. Site measurements and numerical simulations, carried out to describe the boiler operation in details, show operational advantages (e.g. boiler's flexibility, performance improvement, emission reduction) and hazards (e.g. increase of Carbon-In-Ash and physical enthalpy loss) resulting from the co-firing of pre-dried lignite.

Copyright (c) 2018 by ASME
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