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ENHANCEMENT OF PULVERIZED COAL COMBUSTION BY PLASMA TECHNOLOGY

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Plasma-assisted pulverized coal combustion is a promising technology for thermal power plants (TPP). This article reports one- and three-dimensional numerical simulations, as well as laboratory and industrial measurements of coal combustion using a plasma-fuel system (PFS). The chemical kinetic and fluid mechanics involved in this technology are analysed. The results show that a PFS, can be used to promote early ignition and enhanced stabilization of a pulverized coal flame. It is shown that this technology, in addition to enhancing the combustion efficiency of the flame, reduces harmful emissions from power coals of all ranks (brown, bituminous, anthracite and their mixtures). Data summarising the experience of 27 pulverized coal boilers in 16 thermal power plants in several countries (Russia, Kazakhstan, Korea, Ukraine, Slovakia, Mongolia and China), embracing steam productivities from 75 to 670 tons per hour (TPH), are presented. Finally, the practical computation of the characteristics of the PFS, as function of coal properties, is discussed.
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Keywords: Coal; Furnaces; Plasma-assisted combustion; Plasma-fuel system; Plasmatron

Document Type: Research Article

Affiliations: 1: Coria UMR 6614, CNRS, Université de Rouen, Rouen, France 2: Imperial College London, London, United Kingdom 3: Applied Centre of Plasma-Power Technologies of Russian J.S.Co., Gusinoozersk, Russia 4: Research Department of Plasmatechnics, Combustion Problems Institute, Almaty, Kazakhstan

Publication date: October 1, 2007

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