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Boiler conversions for biomass

Abstract

Boiler conversions from grate- and oil-fired boilers to bubbling fluidized bed combustion have been most common in pulp and paper industry. Water treatment sludge combustion, need for additional capacity and tightened emission limits have been the driving forces for the conversion. To accomplish a boiler conversion for biofuel, the lower part of the boiler is replaced with a fluidized bed bottom and new fuel, ash and air systems are added. The Imatran Voima Rauhalahti pulverized-peat-fired boiler was converted to bubbling fluidized bed firing in 1993. In the conversion the boiler capacity was increased by 10 % to 295 MWth and NO{sub x} emissions dropped. In the Kymmene Kuusankoski boiler, the reason for conversion was the combustion of high chlorine content biosludge. The emissions have been under general European limits. During the next years, the emission limits will tighten and the boilers will be designed for most complete combustion and compounds, which can be removed from flue gases, will be taken care of after the boiler. (orig.) 3 refs.
Authors:
Kinni, J [1] 
  1. Tampella Power Inc., Tampere (Finland)
Publication Date:
Dec 31, 1996
Product Type:
Technical Report
Report Number:
VTT-SYMP-164
Reference Number:
SCA: 092000; 014000; PA: FI-98:003012; EDB-98:027708; SN: 98001896192
Resource Relation:
Other Information: PBD: 1996; Related Information: Is Part Of Power production from biomass II with special emphasis on gasification and pyrolysis R and DD; Sipilae, K.; Korhonen, M. [eds.] [VTT Energy, Espoo (Finland). Energy Production Technologies]; PB: 320 p.
Subject:
09 BIOMASS FUELS; 01 COAL, LIGNITE, AND PEAT; BIOMASS; PEAT; FLUIDIZED BED BOILERS; AIR POLLUTION ABATEMENT; RETROFITTING; NITROGEN OXIDES; SULFUR DIOXIDE; PAPER INDUSTRY
OSTI ID:
570549
Research Organizations:
Technical Research Centre of Finland, Espoo (Finland)
Country of Origin:
Finland
Language:
English
Other Identifying Numbers:
Other: ON: DE98724226; ISBN 951-38-4555-9; TRN: FI9803012
Availability:
OSTI as DE98724226
Submitting Site:
FI
Size:
pp. 149-158
Announcement Date:

Citation Formats

Kinni, J. Boiler conversions for biomass. Finland: N. p., 1996. Web.
Kinni, J. Boiler conversions for biomass. Finland.
Kinni, J. 1996. "Boiler conversions for biomass." Finland.
@misc{etde_570549,
title = {Boiler conversions for biomass}
author = {Kinni, J}
abstractNote = {Boiler conversions from grate- and oil-fired boilers to bubbling fluidized bed combustion have been most common in pulp and paper industry. Water treatment sludge combustion, need for additional capacity and tightened emission limits have been the driving forces for the conversion. To accomplish a boiler conversion for biofuel, the lower part of the boiler is replaced with a fluidized bed bottom and new fuel, ash and air systems are added. The Imatran Voima Rauhalahti pulverized-peat-fired boiler was converted to bubbling fluidized bed firing in 1993. In the conversion the boiler capacity was increased by 10 % to 295 MWth and NO{sub x} emissions dropped. In the Kymmene Kuusankoski boiler, the reason for conversion was the combustion of high chlorine content biosludge. The emissions have been under general European limits. During the next years, the emission limits will tighten and the boilers will be designed for most complete combustion and compounds, which can be removed from flue gases, will be taken care of after the boiler. (orig.) 3 refs.}
place = {Finland}
year = {1996}
month = {Dec}
}