Process performance of Ahlstrom Pyroflow PCFB pilot plant

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Ahlstrom Pyropower has designed and built a 10 MW[sub th] (34 MMBtu) pressurized circulating fluidized bed (PCFB) pilot plant in Karhula, Finland. The unit is now operating. Data from this unit supports the design of a nominal 80 MW, Des Moines Energy Center 1 (DMEC-1) PCFB Repowering Project. The pilot plant PCFB combustor is of square cross-section. It is housed in a 3.6 m (11.8 ft) diameter pressure vessel. A high pressure high temperature gas cleaning unit downstream of the PCFB exhaust is installed in a separate 2.6 m (8.5 ft) diameter pressure vessel. The maximum plant operating pressure is ... continued below

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Pages: (9 p)

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Sellakumar, K.M. (R D Center, Ahlstrom Pyropower, Inc., San Diego, CA (United States)); Isaksson, J. & Tiensuu, J. (Ahlstroem Pyropower, Inc., Karhula (Finland). Hans Ahlstroem Lab.) May 1, 1993.

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Ahlstrom Pyropower has designed and built a 10 MW[sub th] (34 MMBtu) pressurized circulating fluidized bed (PCFB) pilot plant in Karhula, Finland. The unit is now operating. Data from this unit supports the design of a nominal 80 MW, Des Moines Energy Center 1 (DMEC-1) PCFB Repowering Project. The pilot plant PCFB combustor is of square cross-section. It is housed in a 3.6 m (11.8 ft) diameter pressure vessel. A high pressure high temperature gas cleaning unit downstream of the PCFB exhaust is installed in a separate 2.6 m (8.5 ft) diameter pressure vessel. The maximum plant operating pressure is 16 bar (232 psia). The fuel is fed in slurry form; sorbent is also fed along with the fuel. The net heat input per unit cross section of the combustor is the highest of any known combustion mode. The heat release can go up to 40 MW/m[sup 2] (12.6 MMBtu/ft[sup 2] hr). Many types of coals including high sulfur, bituminous Illinois No. 6 coal and Western sub bituminous, low sulfur Powder River Basin coal were tested. Combustion efficiencies in the range of 99.5 to 99.9% have been consistently observed. Emissions of various gases such as NO[sub x] SO[sub 2] and CO at different operating pressures and loads were monitored. The gas emissions have been lower than expected based on atmospheric circulating fluidized bed boiler experience. The sulfur retention is over 95 % with a Ca/S molar ratio of 1 to 2 for high sulfur Illinois No.6 coal. A GAVS molar ratio of 2.5 to 3.5 was observed to retain 95 % of sulfur with low sulfur Powder River Basin coal. All gaseous emissions during testing with Illinois No. 6 coal and Powder River Basin coal are well within the projected limits for the DMEC1 project. Emission data from tests with Illinois No. 6 coal and Powder River Basin coal are presented in the paper.

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Pages: (9 p)

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OSTI; NTIS; GPO Dep.

Source

  • 12. international conference on fluidized-bed combustion, San Diego, CA (United States), 8-13 May 1993

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  • Other: DE93011584
  • Report No.: DOE/MC/27364-93/C0186
  • Report No.: CONF-930521--7
  • Grant Number: FC21-91MC27364
  • Office of Scientific & Technical Information Report Number: 6596094
  • Archival Resource Key: ark:/67531/metadc1198298

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • May 1, 1993

Added to The UNT Digital Library

  • July 3, 2018, 8:14 a.m.

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  • Aug. 21, 2018, 12:23 p.m.

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Sellakumar, K.M. (R D Center, Ahlstrom Pyropower, Inc., San Diego, CA (United States)); Isaksson, J. & Tiensuu, J. (Ahlstroem Pyropower, Inc., Karhula (Finland). Hans Ahlstroem Lab.). Process performance of Ahlstrom Pyroflow PCFB pilot plant, article, May 1, 1993; United States. (https://digital.library.unt.edu/ark:/67531/metadc1198298/: accessed March 20, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.