Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 390-395 |
| Number of pages | 6 |
| Journal | Energy & Fuels |
| Volume | 13 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1999 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- fluidized beds
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A field study on ash behaviour during circulating fluidized-bed combustion of biomass : 2. Ash deposition and alkali vapour condensation. / Valmari, Tuomas; Lind, Terttaliisa; Sfiris, George; Nilsson, Kristina; Maenhaut, Willy; Kauppinen, E.I. (Corresponding Author).
In: Energy & Fuels, Vol. 13, No. 2, 1999, p. 390-395.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - A field study on ash behaviour during circulating fluidized-bed combustion of biomass
T2 - 2. Ash deposition and alkali vapour condensation
AU - Valmari, Tuomas
AU - Lind, Terttaliisa
AU - Sfiris, George
AU - Nilsson, Kristina
AU - Maenhaut, Willy
AU - Kauppinen, E.I.
N1 - Project code: K6SU00001
PY - 1999
Y1 - 1999
N2 - Fly ash deposition on heat-exchanger surfaces during fluidized-bed combustion of biomass causes operational problems such as reduced heat transfer and corrosion of superheater tubes. Ash deposition and alkali vapor condensation were studied during circulating fluidized-bed combustion of forest residue in a 35 MW co-generation plant. A 70 ± 10% amount of fly ash was deposited on the heat-exchanger surfaces in the convective back pass between soot-blowing periods. Practically all the largest ash particles (d > 10 μm) but only a small fraction of particles d < 3 μm were deposited. The deposition efficiency of particles with a given size was not correlated with their elemental composition. About 50% of alkali chloride vapors (KCl and NaCl) were condensed in the convective back pass on fine-mode particles (d < 0.6 μm) and the other 50% on the coarse-mode particles. Alkali chlorides were not effectively deposited since they were depleted in the largest (d > 10 μm) ash particles.
AB - Fly ash deposition on heat-exchanger surfaces during fluidized-bed combustion of biomass causes operational problems such as reduced heat transfer and corrosion of superheater tubes. Ash deposition and alkali vapor condensation were studied during circulating fluidized-bed combustion of forest residue in a 35 MW co-generation plant. A 70 ± 10% amount of fly ash was deposited on the heat-exchanger surfaces in the convective back pass between soot-blowing periods. Practically all the largest ash particles (d > 10 μm) but only a small fraction of particles d < 3 μm were deposited. The deposition efficiency of particles with a given size was not correlated with their elemental composition. About 50% of alkali chloride vapors (KCl and NaCl) were condensed in the convective back pass on fine-mode particles (d < 0.6 μm) and the other 50% on the coarse-mode particles. Alkali chlorides were not effectively deposited since they were depleted in the largest (d > 10 μm) ash particles.
KW - fluidized beds
U2 - 10.1021/ef9800866
DO - 10.1021/ef9800866
M3 - Article
VL - 13
SP - 390
EP - 395
JO - Energy & Fuels
JF - Energy & Fuels
SN - 0887-0624
IS - 2
ER -