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research-article

COMBUSTION PROCESS ANALYSIS AND DIAGNOSTIC USING OPTICAL FLAME SCANNERS IN FRONT-FIRED PULVERIZED COAL BOILER

[+] Author and Article Information
Daniel Nabaglo

PGE Energia Ciepła S.A., Research & Development Department, Ciepłownicza St. 1, 31-587 Krakow, Poland
daniel.nabaglo@gkpge.pl

Teresa Kurek

Warsaw University of Technology, Institute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Nowowiejska St. 21/25, 00-665 Warsaw, Poland
teresa.kurek@itc.pw.edu.pl

Konrad Wojdan

Warsaw University of Technology, Institute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Nowowiejska St. 21/25, 00-665 Warsaw, Poland
konrad.wojdan@itc.pw.edu.pl

1Corresponding author.

ASME doi:10.1115/1.4039096 History: Received January 19, 2017; Revised December 05, 2017

Abstract

The paper presents the novel concept and method of coal combustion process analysis using the flame scanners supervision system. The combustion process analysis and diagnostic has a crucial influence on boiler effectiveness especially in high variance of load demand which is nowadays a top challenge for coal fired power plants. The analysis of combustion process was done for 650 t/h live steam power boiler which is supplied by 5 coal mill units. Each coal mill supplies 4 pulverized coal burners (PF burners). The boiler start-up installation consist of 12 heavy oil burners placed in PF burners equipped with individual supervisory system based on flame scanners Paragon 105f-1 which gave the possibility to observe and analyze the PF burner flame and oil burner flame individually. The research included a numerous test where the combustion condition inside combustion chamber have been changed. During stable load of selected mills the primary air flow, secondary air dumpers, air-coal mixture temperature and balance were changed. The results of changes were observed by flame scanners and available optical parameters of the flame were analyzed: power spectral density, average amplitude of flame fluctuation and flame temperature.

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