NDLI: Formation and Characteristics of Combustion Aerosols from Co-firing of Coal and Solid Recovered Fuel in a 400 Mw Pf-fired Coal Boiler

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Formation and Characteristics of Combustion Aerosols from Co-firing of Coal and Solid Recovered Fuel in a 400 Mw Pf-fired Coal Boiler

Content Provider	Semantic Scholar
Author	Pedersen, Anne Juul Wu, Houzheng Frandsen, Flemming J. Sander, Bo
Copyright Year	2011
Abstract	The formation of combustion aerosols (i.e. particles with an aerodynamic diameter below 2.5 μm) during co-firing of coal and solid recovered fuel (SRF) was studied through direct sampling in a 400 MW pulverized coal-fired power plant. During the tests, the plant was operated at both dedicated coal combustion conditions and under conditions with co-firing of up to 10 % (thermal basis) of SRF. The SRF was characterized by high contents of Cl, Ca, Na, while the coal had relatively higher S, Al, Fe and K contents. The mass-based particle size distribution of the aerosols was found to be bi-modal, with an ultrafine (vaporization) mode centered around 0.1 μm, and a coarser (fine-fragmentation) mode above 2 μm. Co-firing of SRF tended to increase the ultrafine peak, while decreasing the coarse peak as well as the total mass load (PM2.5). The increased formation of ultrafine particles was most likely caused by increased vaporization and subsequent condensation of Ca, P, and K during co-firing of SRF. Finally, our results indicated that a reduced collection efficiency of the electrostatic precipitator observed during co-firing of SRF may be linked to SO3 deficiency in the flue gas. Small amounts of SO3 are needed for proper ESP performance.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.ffrc.fi/FlameDays_2011/Session_1_Multifuel_combustion/2pedersen.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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