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Field and CFD Study of Fuel Distribution in Pulverized Fuel(PF)Boilers

Journal of Thermal Science 2020年第3期29卷 535-545页

作者： ciukaj szymon HERNIK Bartlomiej Institute of Power Engineering and Turbomachinery Silesian University of Technology(SUT)Konarskiego 2044-101 GliwicePoland

The article presents both field and CFD results of a new concept of a mechanical pulverized fuel(PF)*** goal of the study was to improve the pulverized coal-air mixture separation in PF boilers where the fuel preparation and feeding system was operated in a combined coal and biomass grinding *** numerical analysis was preceded after a field study,where measurements were carried out in a pulverized coal-fired(PC)boiler equipped with a technology of NOx reduction by means of primary *** distribution of a pulverized coal-air mixture to the individual burners is one of the fundamental tasks of the combustion systems where the primary methods are implemented to control the NOx *** maintaining the proper distribution of fuel to the burners related primarily to the boilers where the coal and biomass co-grinding is *** the load of coal-mills and fuel type at the same time(i.e.,different types of biomass)could result in less effective separation of pulverized fuel particles in PF *** of an appropriate construction of a distributor will allow the better control of the combustion process which results in decreased NOx emission while keeping the proper combustion efficiency,i.e.,less unburned carbon(UBC)in the fly *** results of the field measurements made it possible to create a CFD distribution base model,which was used for the analysis of a new splitter construction to be used in a PF *** analysis of the numerical splitter enables precise analysis of its construction,including the efficiency of separation and the prediction of conveying of the coal and biomass particles.

关键词： pulverized fuel(PF)boiler NOx reduction biomass co-firing fuel distribution

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