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Scrubber liquid recovery in small and medium scale biomass gasification sysyems

Malek, L. LU ; Hulteberg, C. LU ; Svensson, H. LU and Hofbauer, H. (2016) 24th European Biomass Conference and Exhibition, 2016 In European Biomass Conference and Exhibition Proceedings 2016. p.863-867
Abstract

Scrubbing is widely used in biomass gasification plants for tar removal. However, the cost of the scrubber liquid and its disposal once used can represent a non-negligible part of the plant operating cost. It is possible to lower this cost by regenerating and reusing the scrubber liquid by removing ash and heavy tars with the help of a centrifuge. Data from the two biomass gasification plants Hortlax (Sweden) and Oberwart (Austria) was used for preliminary centrifuge evaluations and a techno-economic study. The results show that installing a centrifuge for scrubber liquid regeneration would be of great benefit in Hortlax but not in Oberwart. A techno-economic study made for two different centrifuges with different capacities (7... (More)

Scrubbing is widely used in biomass gasification plants for tar removal. However, the cost of the scrubber liquid and its disposal once used can represent a non-negligible part of the plant operating cost. It is possible to lower this cost by regenerating and reusing the scrubber liquid by removing ash and heavy tars with the help of a centrifuge. Data from the two biomass gasification plants Hortlax (Sweden) and Oberwart (Austria) was used for preliminary centrifuge evaluations and a techno-economic study. The results show that installing a centrifuge for scrubber liquid regeneration would be of great benefit in Hortlax but not in Oberwart. A techno-economic study made for two different centrifuges with different capacities (7 m3/h and 20 m3/h respectively) combined with variations in investment cost and scrubber liquid prices showed that the scrubber liquid consumption in Hortlax could be lowered from 85 to 15.7-40.7 l/MWhelectricity for the 7 m3/h centrifuge and 6.2-20.5 l/MWhelectricityfor the 20 m3/h centrifuge. This corresponds to annual savings of 2.3-6 MSEK and 4.5-6.5 MSEK respectively. The payback time for the smaller centrifuge was estimated to 0.5-1.6 years and 0.7-1.3 years for the larger centrifuge.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Centrifugation, Economical aspects, Gas cleaning, Gasification
in
European Biomass Conference and Exhibition Proceedings
volume
2016
pages
5 pages
publisher
ETA-Florence Renewable Energies
conference name
24th European Biomass Conference and Exhibition, 2016
external identifiers
  • scopus:85019732840
DOI
10.5071/24thEUBCE2016-2CV.3.20
language
English
LU publication?
yes
id
986e2124-dfde-4095-98e5-d6e24da4d522
date added to LUP
2017-06-09 11:36:42
date last changed
2017-06-11 05:17:00
@inproceedings{986e2124-dfde-4095-98e5-d6e24da4d522,
  abstract     = {<p>Scrubbing is widely used in biomass gasification plants for tar removal. However, the cost of the scrubber liquid and its disposal once used can represent a non-negligible part of the plant operating cost. It is possible to lower this cost by regenerating and reusing the scrubber liquid by removing ash and heavy tars with the help of a centrifuge. Data from the two biomass gasification plants Hortlax (Sweden) and Oberwart (Austria) was used for preliminary centrifuge evaluations and a techno-economic study. The results show that installing a centrifuge for scrubber liquid regeneration would be of great benefit in Hortlax but not in Oberwart. A techno-economic study made for two different centrifuges with different capacities (7 m<sup>3</sup>/h and 20 m<sup>3</sup>/h respectively) combined with variations in investment cost and scrubber liquid prices showed that the scrubber liquid consumption in Hortlax could be lowered from 85 to 15.7-40.7 l/MWhelectricity for the 7 m<sup>3</sup>/h centrifuge and 6.2-20.5 l/MWh<sub>electricity</sub>for the 20 m<sup>3</sup>/h centrifuge. This corresponds to annual savings of 2.3-6 MSEK and 4.5-6.5 MSEK respectively. The payback time for the smaller centrifuge was estimated to 0.5-1.6 years and 0.7-1.3 years for the larger centrifuge.</p>},
  author       = {Malek, L. and Hulteberg, C. and Svensson, H. and Hofbauer, H.},
  booktitle    = {European Biomass Conference and Exhibition Proceedings},
  keyword      = {Centrifugation,Economical aspects,Gas cleaning,Gasification},
  language     = {eng},
  pages        = {863--867},
  publisher    = {ETA-Florence Renewable Energies},
  title        = {Scrubber liquid recovery in small and medium scale biomass gasification sysyems},
  url          = {http://dx.doi.org/10.5071/24thEUBCE2016-2CV.3.20},
  volume       = {2016},
  year         = {2016},
}