Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 93 - 105 |
| Number of pages | 13 |
| Journal | Thermal Science |
| Volume | 8 |
| Issue number | 2 |
| Publication status | Published - 2004 |
| MoE publication type | A1 Journal article-refereed |
Fingerprint
Cite this
}
Effects of biomass on dynamics of combustion in circulating fluidized beds. / Tourunen, Antti (Corresponding Author); Häsä, Heidi; Pitsinki, Juha; Jegoroff, Mikko; Saastamoinen, Jaakko; Hämäläinen, Jouni.
In: Thermal Science, Vol. 8, No. 2, 2004, p. 93 - 105.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Effects of biomass on dynamics of combustion in circulating fluidized beds
AU - Tourunen, Antti
AU - Häsä, Heidi
AU - Pitsinki, Juha
AU - Jegoroff, Mikko
AU - Saastamoinen, Jaakko
AU - Hämäläinen, Jouni
N1 - Project code: C4SU00036
PY - 2004
Y1 - 2004
N2 - Fludized bed technology is very suitable for the combustion of biomass. Nevertheless substitution of coal with biomass affects boiler operation and especially dynamics and controllability. Non-homogeneity of biomass and fuel feeding disturbances cause process unstability, such as variations in temperatures and pressures, which reduce lifetime of equipment and structures. Because of process unstability higher air coefficient must be used in order to avoid CO emissions, which is not economical. Combustion profiles for coal, wood and peat, measured at the VTT Processes Pilot circulating fluidized bed reactor, have been compared. Process stability and char inventories have been studied by the measurements and the model. Biofuels are usually very reactive and their combustion profiles are quite different compared to coals. Because of high reactivity and low char content combustion process with biofuels is very sensitive for fuel feeding. Also low char inventory effect on load changes combined with combustion profile that differs from coals. Because of different combustion profile heat transfer can be a limiting factor in load changes despite the high reactivity and fast oxygen response.
AB - Fludized bed technology is very suitable for the combustion of biomass. Nevertheless substitution of coal with biomass affects boiler operation and especially dynamics and controllability. Non-homogeneity of biomass and fuel feeding disturbances cause process unstability, such as variations in temperatures and pressures, which reduce lifetime of equipment and structures. Because of process unstability higher air coefficient must be used in order to avoid CO emissions, which is not economical. Combustion profiles for coal, wood and peat, measured at the VTT Processes Pilot circulating fluidized bed reactor, have been compared. Process stability and char inventories have been studied by the measurements and the model. Biofuels are usually very reactive and their combustion profiles are quite different compared to coals. Because of high reactivity and low char content combustion process with biofuels is very sensitive for fuel feeding. Also low char inventory effect on load changes combined with combustion profile that differs from coals. Because of different combustion profile heat transfer can be a limiting factor in load changes despite the high reactivity and fast oxygen response.
M3 - Article
VL - 8
SP - 93
EP - 105
JO - Thermal Science
JF - Thermal Science
SN - 0354-9836
IS - 2
ER -