Potassium, chlorine, and sulfur in ash, particles, deposits, and corrosion during wood combustion in a circulating fluidized-bed boiler
Artikel i vetenskaplig tidskrift, 2007

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 performed downstream of the cyclone before the convection pass and the flue gas composition was recorded in the stack with a series of standard instruments and an FTIR analyzer. At the position downstream of the cyclone, a deposit probe was situated, simulating a superheater tube. Deposits on the probe and initial corrosion were examined. It is concluded that addition of sulfur and chlorine increases the formation of submicron particles leading to deposition of potassium sulfate and chloride. The results compare well with earlier work based on laboratory-scale experiments concerning effects of chlorine and sulfur on potassium chemistry.

AEROSOLS

PILOT-SCALE

BIOMASS-FIRED BOILERS

600-DEGREES-C

ALKALI

NUCLEATION

AGGLOMERATION

HIGH-TEMPERATURE CORROSION

BEHAVIOR

COAL

Författare

Kent Davidsson

Chalmers, Energi och miljö, Energiteknik

Lars-Erik Åmand

Chalmers, Energi och miljö

Bo G Leckner

Chalmers, Energi och miljö

Borka Kovacevik

Göteborgs universitet

Maria Svane

Göteborgs universitet

Magnus Hagström

Göteborgs universitet

Jan B. C. Pettersson

Göteborgs universitet

Jesper Liske

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Henrik Asteman

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Jan-Erik Svensson

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Lars-Gunnar Johansson

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Energy & Fuels

0887-0624 (ISSN) 1520-5029 (eISSN)

Vol. 21 71-81

Drivkrafter

Hållbar utveckling

Ämneskategorier

Energiteknik

Annan naturresursteknik

Styrkeområden

Energi

Infrastruktur

Chalmers kraftcentral

DOI

10.1021/ef060306c