Potassium, Chlorine, and Sulfur in Ash, Particles, Deposits, and Corrosion during Wood Combustion in a Circulating Fluidized-Bed Boiler
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- 作者：Kent O. Davidsson ; Lars-Erik Å ; mand ; Bo Leckner ; Borka Kovacevik ; Maria Svane ; Magnus Hagströ ; m ; Jan B. C. Pettersson ; Jesper Pettersson ; Henrik Asteman ; Jan-Erik Svensson ; Lars-Gunnar Johanss
- 刊名：Energy & Fuels
- 出版年：2007
- 出版时间：January 2007
- 年：2007
- 卷：21
- 期：1
- 页码：71 - 81
- 全文大小：953K
- 年卷期：v.21,no.1(January 2007)
- ISSN：1520-5029
文摘
The effect of the addition of chlorine and/or sulfur to the fuel on fly ash composition, deposit formation,and superheater corrosion has been studied during biomass combustion in a circulating fluidized-bed boiler.The chlorine (HCl (aq)) and sulfur (SO2 (g)) were added in proportions of relevance for the potassium chemistry.The composition of the bottom and the fly ashes was analyzed. Gas and particle measurements were performeddownstream of the cyclone before the convection pass and the flue gas composition was recorded in the stackwith a series of standard instruments and an FTIR analyzer. At the position downstream of the cyclone, adeposit probe was situated, simulating a superheater tube. Deposits on the probe and initial corrosion wereexamined. It is concluded that addition of sulfur and chlorine increases the formation of submicron particlesleading to deposition of potassium sulfate and chloride. The results compare well with earlier work based onlaboratory-scale experiments concerning effects of chlorine and sulfur on potassium chemistry.