Optimisation of multifuel-based bioenergy production

Markku Orjala, Jouni Hämäläinen, Pasi Vainikka, Anne Suomalainen, Janne Kärki, Markku Mäkipää

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

Abstract

Utilisation of solid biofuels and wastes sets new demands for fuel handling and feeding systems, as well as for boiler design and combustion technologies. Especially ash quality of wood fuels differs remarkably chemically from ashes of peat or coals and other fossil fuels. The alkaline metals, which are usually responsible for fouling of heat transfer surfaces, are abundant in wood and will be released during combustion easily in gas phase. The combustion and co-firing properties of fuels have been studied both in VTT's test facilities and in industrial-scale power plant boilers. The formation of alkaline and chlorine compounds and their effect on boiler fouling and corrosion have been monitored by cooled temperature controlled deposit and material probes. The experimental studies clearly showed that if sulphur existed in combustion environment, chlorine was released as HCl and did not drift into deposits. Fouling of the boiler effects on several factors at the plant. These factors, e.g. the increment of operating and maintenance costs caused by fouling of the boiler, can increase the energy production costs significantly. In addition to increased need for soot blowing and cleaning, as well as the possible renovation need of the super heaters, the efficiency of the boiler decreases as thermally insulating ash deposits on the heat transfer surfaces of the boiler. By the side of these factors costs are caused by more often replaced bed material, the increased need for power consumption of the plants, and storage costs of wood fuels
Original languageEnglish
Title of host publicationEUBCE Conference Proceedings 2002
PublisherETA-Florence Renewable Energies
Number of pages4
ISBN (Electronic)88-900442-7-6
ISBN (Print)88-900442-5-x
Publication statusPublished - 2002
MoE publication typeB3 Non-refereed article in conference proceedings
Event12th European Conference and Exhibition on Biomass for Energy, Industry and Climate Protection - Amsterdam, Netherlands
Duration: 17 Jun 200221 Jun 2002
Conference number: 12

Conference

Conference12th European Conference and Exhibition on Biomass for Energy, Industry and Climate Protection
CountryNetherlands
CityAmsterdam
Period17/06/0221/06/02

Fingerprint

Boilers
Fouling
Ashes
Wood fuels
Deposits
Costs
Heat transfer
Peat
Biofuels
Soot
Chlorine compounds
Blow molding
Test facilities
Fossil fuels
Chlorine
Coal ash
Cleaning
Wood
Power plants
Electric power utilization

Keywords

  • co-combustion
  • operating experiences
  • fluidized beds

Cite this

Orjala, M., Hämäläinen, J., Vainikka, P., Suomalainen, A., Kärki, J., & Mäkipää, M. (2002). Optimisation of multifuel-based bioenergy production. In EUBCE Conference Proceedings 2002 ETA-Florence Renewable Energies.
Orjala, Markku ; Hämäläinen, Jouni ; Vainikka, Pasi ; Suomalainen, Anne ; Kärki, Janne ; Mäkipää, Markku. / Optimisation of multifuel-based bioenergy production. EUBCE Conference Proceedings 2002. ETA-Florence Renewable Energies, 2002.
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Orjala, M, Hämäläinen, J, Vainikka, P, Suomalainen, A, Kärki, J & Mäkipää, M 2002, Optimisation of multifuel-based bioenergy production. in EUBCE Conference Proceedings 2002. ETA-Florence Renewable Energies, 12th European Conference and Exhibition on Biomass for Energy, Industry and Climate Protection, Amsterdam, Netherlands, 17/06/02.

Optimisation of multifuel-based bioenergy production. / Orjala, Markku; Hämäläinen, Jouni; Vainikka, Pasi; Suomalainen, Anne; Kärki, Janne; Mäkipää, Markku.

EUBCE Conference Proceedings 2002. ETA-Florence Renewable Energies, 2002.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

TY - GEN

T1 - Optimisation of multifuel-based bioenergy production

AU - Orjala, Markku

AU - Hämäläinen, Jouni

AU - Vainikka, Pasi

AU - Suomalainen, Anne

AU - Kärki, Janne

AU - Mäkipää, Markku

PY - 2002

Y1 - 2002

N2 - Utilisation of solid biofuels and wastes sets new demands for fuel handling and feeding systems, as well as for boiler design and combustion technologies. Especially ash quality of wood fuels differs remarkably chemically from ashes of peat or coals and other fossil fuels. The alkaline metals, which are usually responsible for fouling of heat transfer surfaces, are abundant in wood and will be released during combustion easily in gas phase. The combustion and co-firing properties of fuels have been studied both in VTT's test facilities and in industrial-scale power plant boilers. The formation of alkaline and chlorine compounds and their effect on boiler fouling and corrosion have been monitored by cooled temperature controlled deposit and material probes. The experimental studies clearly showed that if sulphur existed in combustion environment, chlorine was released as HCl and did not drift into deposits. Fouling of the boiler effects on several factors at the plant. These factors, e.g. the increment of operating and maintenance costs caused by fouling of the boiler, can increase the energy production costs significantly. In addition to increased need for soot blowing and cleaning, as well as the possible renovation need of the super heaters, the efficiency of the boiler decreases as thermally insulating ash deposits on the heat transfer surfaces of the boiler. By the side of these factors costs are caused by more often replaced bed material, the increased need for power consumption of the plants, and storage costs of wood fuels

AB - Utilisation of solid biofuels and wastes sets new demands for fuel handling and feeding systems, as well as for boiler design and combustion technologies. Especially ash quality of wood fuels differs remarkably chemically from ashes of peat or coals and other fossil fuels. The alkaline metals, which are usually responsible for fouling of heat transfer surfaces, are abundant in wood and will be released during combustion easily in gas phase. The combustion and co-firing properties of fuels have been studied both in VTT's test facilities and in industrial-scale power plant boilers. The formation of alkaline and chlorine compounds and their effect on boiler fouling and corrosion have been monitored by cooled temperature controlled deposit and material probes. The experimental studies clearly showed that if sulphur existed in combustion environment, chlorine was released as HCl and did not drift into deposits. Fouling of the boiler effects on several factors at the plant. These factors, e.g. the increment of operating and maintenance costs caused by fouling of the boiler, can increase the energy production costs significantly. In addition to increased need for soot blowing and cleaning, as well as the possible renovation need of the super heaters, the efficiency of the boiler decreases as thermally insulating ash deposits on the heat transfer surfaces of the boiler. By the side of these factors costs are caused by more often replaced bed material, the increased need for power consumption of the plants, and storage costs of wood fuels

KW - co-combustion

KW - operating experiences

KW - fluidized beds

M3 - Conference article in proceedings

SN - 88-900442-5-x

BT - EUBCE Conference Proceedings 2002

PB - ETA-Florence Renewable Energies

ER -

Orjala M, Hämäläinen J, Vainikka P, Suomalainen A, Kärki J, Mäkipää M. Optimisation of multifuel-based bioenergy production. In EUBCE Conference Proceedings 2002. ETA-Florence Renewable Energies. 2002