FUTURE AEROSOL TECHNOLOGICAL APPLICATIONS

Cite abstract as Author(s) (2007), Title, European Aerosol Conference 2007, Salzburg, Abstract T14A026
Detailed particle analysis in the hot flue gas of a municipal waste incineration plant
Christian Deuerling1, Jürgen Maguhn1, Hermann Nordsieck2, Ragnar Warnecke3 and Ralf Zimmermann1,2,4
1
Institut für Ökologische Chemie, GSF-Forschungszentrum für Umwelt und Gesundheit GmbH, Ingolstädter
Landstrasse 1, D-85764 Neuherberg, Germany
2
Abteilung Umweltchemie und Prozessanalytik, BIfA-Bayerisches Institut für Angewandte Umweltforschung
und -technik, Am Mittleren Moos 46, D-86167 Augsburg, Germany
3
GKS Gemeinschaftskraftwerk Schweinfurt GmbH, Hafenstrasse 30, 97424 Schweinfurt
4
Analytische Chemie, Institut für Physik, Universität Augsburg, Universitätsstrasse 1, D-86159 Augsburg
Keywords: Aerosol Measurement, Cascade Impactor, Combustion Particles, high temperature aerosols
Normal Operation, Mass Concentration, 1st - 4th pass (mean values)
Mass Concentration [g/m³]
10
1
upon travel through the flue gas duct due to
agglomeration and condensation effects.
The chemical composition of the particles also
changes (Fig. 2) due to condensation of volatile
compounds and chemical reactions. An increase of
the sulphur content can be observed probably due to
sulphatation of chlorides.
Chemical Composition of the Particles < 1 µm in the 4 Passes
(inlet content not included)
1,0
Mass Concentration [g/m³]
High-temperature chlorine corrosion of super
heaters is one of the main cost factors of running
municipal solid waste incineration (MSWI) plants.
To setup a comprehensive model for corrosion
in a MSWI plant, a measurement system was
developed to analyse the complex processes the
waste incineration raw gas is subjected to upon travel
through the flue-gas duct of a MSWI boiler. Particles
from 30 nm to 3 mm were sampled off-stack, size
fractionated and analysed concerning mass concentration and chemical composition. Additionally,
acidic components of the gas phase were analysed.
Measurements were performed in the first (900 °C)
and 2nd pass (700 °C), straight behind the first two
super heater blocks in the 3rd pass (500 °C) and in the
4th pass (300 °C). Because of temporal variation of
the fuel composition, each measurement was carried
out in parallel at the reference point (2nd pass) and at
the measuring point in question by two identical
measurement systems.
In order to sample the particulate matter in its current
state, rapid dilution of the raw gas was accomplished
by a porous tube diluter positioned directly behind
the inlet of the sampling probe. The probe is held at a
constant temperature of 300 °C. The raw gas
subsequently passes a cyclone, further diluters and
enters the instruments for analysis of chemistry and
morphology.
0,9
0,8
0,7
0,6
0,5
0,4
0,3
0,2
0,1
0,0
1st pass
2nd pass
3rd pass
4th pass
Passes
S
Cl
Si
Na
K
Ca
Fe
Zn
Pb
Figure 2. Changes in chemical composition of the
fine particles upon travel through the flue-gas duct
Modifications of the operation conditions of
the plant on corrosion parameters such as reduction
of the length of the fire, changing of the rate of
recirculated air, adding of sulphur to the waste and
injection of SO2 were performed resulting in changes
of aerosol composition.
This project is funded by the Bayerisches
Staatsministerium für Umwelt, Gesundheit und
Verbraucherschutz within the scope of the European
Regional Development Fund (ERDF).
The author wishes to thank Max-BuchnerForschungsstiftung for their kind support.
0.1
0.01
0.001
0.0001
0.01
0.1
1
10
100
1000
10000
Particle Size [µm]
Z1
Z1 line
Z2
Z2 line
Z3
Z3 line
Z4
Z4 line
Figure 1. Size distribution of particle mass concentration in the four consecutive passes of the waste
incineration boiler.
At normal operation conditions of the plant a
bimodal size distribution of the particles can be
observed (Fig. 1) showing growth of the particles
Deuerling, C., Maguhn, J., Nordsieck, H., Reznikov,
G., Zimmermann, R. & Warnecke, R. (2005).
Proc. Europ. Aerosol Conf., Ghent, 373.
Schroer, C. & Konys, J. (2002). Report,
Forschungszentrum Karlsruhe.
Maguhn, J., Karg, E., Kettrup, A. & Zimmermann, R.
(2003). Environ. Sci. Technol., 37, 4761-4770.