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Explosionsrisker med flygaska från biobränsleeldade fjärrvärmeverk

Persson, Marcus LU (2024) In LUTVDG/TVBB VBRM10 20241
Division of Fire Safety Engineering
Abstract
The use of biofuel has been used a long time and its consumption keeps increasing. Depending on where the fuel comes from, the chemical composition can be very different. There have been incidents of ashes generating flammable gases, but also the ashes itself have been seen in dust explosion incidents. The risk must be understood and evaluated properly. This paper aims to investigate how explosive fly ash is from biofuel-fired district heating plants, with gradually increasing explosive parameters. And at the same time verify if the changed parameters made it more explosive. It also aims to analyze the ash handling process withing the district heating plant, the HAZOP method was utilized to find faults in the system as part of the risk... (More)
The use of biofuel has been used a long time and its consumption keeps increasing. Depending on where the fuel comes from, the chemical composition can be very different. There have been incidents of ashes generating flammable gases, but also the ashes itself have been seen in dust explosion incidents. The risk must be understood and evaluated properly. This paper aims to investigate how explosive fly ash is from biofuel-fired district heating plants, with gradually increasing explosive parameters. And at the same time verify if the changed parameters made it more explosive. It also aims to analyze the ash handling process withing the district heating plant, the HAZOP method was utilized to find faults in the system as part of the risk analysis. The result demonstrates that the changes made to the equipment was successful in making the dust tested more explosive in the equipment. The testing on the fly ash never successfully exploded, this indicates that fly ash is not explosive in normal temperatures. The risk analysis showed that the district heating plant Flintrännan had a good coverage of protection against deviations from the norm. However, the analysis indicated that if one type of alarm did not work correctly, things could go wrong which is why this paper recommends having redundancy by having dual alarms. (Less)
Please use this url to cite or link to this publication:
author
Persson, Marcus LU
supervisor
organization
alternative title
Explosions risks with fly ash from biofuel-fired district heating plants
course
VBRM10 20241
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Aska, Askhantering, Flygaska, Dammexplosioner, HAZOP, Ash, Ash handling, Fly ash, Dust explosions
publication/series
LUTVDG/TVBB
report number
5729
other publication id
LUTVDG/TVBB--5729--SE
language
Swedish
id
9167936
date added to LUP
2024-06-25 15:03:31
date last changed
2024-06-25 15:03:31
@misc{9167936,
  abstract     = {{The use of biofuel has been used a long time and its consumption keeps increasing. Depending on where the fuel comes from, the chemical composition can be very different. There have been incidents of ashes generating flammable gases, but also the ashes itself have been seen in dust explosion incidents. The risk must be understood and evaluated properly. This paper aims to investigate how explosive fly ash is from biofuel-fired district heating plants, with gradually increasing explosive parameters. And at the same time verify if the changed parameters made it more explosive. It also aims to analyze the ash handling process withing the district heating plant, the HAZOP method was utilized to find faults in the system as part of the risk analysis. The result demonstrates that the changes made to the equipment was successful in making the dust tested more explosive in the equipment. The testing on the fly ash never successfully exploded, this indicates that fly ash is not explosive in normal temperatures. The risk analysis showed that the district heating plant Flintrännan had a good coverage of protection against deviations from the norm. However, the analysis indicated that if one type of alarm did not work correctly, things could go wrong which is why this paper recommends having redundancy by having dual alarms.}},
  author       = {{Persson, Marcus}},
  language     = {{swe}},
  note         = {{Student Paper}},
  series       = {{LUTVDG/TVBB}},
  title        = {{Explosionsrisker med flygaska från biobränsleeldade fjärrvärmeverk}},
  year         = {{2024}},
}