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Drop formation of black liquor spraying; Mustalipeaen pisaroituminen

Abstract

Black liquor is a spent liquor of the pulp and paper industry. It is burned in kraft recovery boilers for chemical and energy recovery. The high dry solids content and viscosity of black liquor require a high spraying temperature. This affects the performance of the boiler. Kraft recovery boiler deposit formation, emissions and chemical recovery are strongly affected by the drop size and the velocity of the black liquor spray formed by a splashplate nozzle. The sheet breakup mechanism is studied with a system based on a video and image-analysis. The drop size of mill-scale nozzles was measured also with an image-analysis-system. Measurements were carried out in a spray test chamber. The sheet breakup mechanism and drop size tests were carried out both below and over the boiling point of black liquor. Special attention was paid to the effect of flashing on drop formation. Temperature increase normally decreases drop size. In the temperature where the wavy-sheet disintegration changes to perforated-sheet disintegration the drop size increases. Spray velocity rises when the temperature is increased above the boiling point. (orig.)
Authors:
Fogelholm, C J; Kankkunen, A; Nieminen, K; Laine, J; Miikkulainen, P [1] 
  1. Helsinki Univ. of Technology, Otaniemi (Finland): Lab. of Energy Technology and Environmental Protection
Publication Date:
Oct 01, 1997
Product Type:
Technical Report
Report Number:
AAA-LIEKKI-L97-1-Pt.2
Reference Number:
SCA: 091000; PA: FI-97:003587; EDB-97:129641; SN: 97001852410
Resource Relation:
Other Information: DN: LIEKKI 2 Research Programme; PBD: 1997; Related Information: Is Part Of LIEKKI 2 - Annual Review 1997. Project reports; Hupa, M.; Matinlinna, J.; Ljung, M. [eds.]; PB: 484 p.
Subject:
09 BIOMASS FUELS; SPENT LIQUORS; DROPLETS; PARTICLE SIZE; NOZZLES; PAPER INDUSTRY; SPRAYS
OSTI ID:
531316
Research Organizations:
Aabo Akademi, Turku (Finland). Combustion Chemistry Research Group
Country of Origin:
Finland
Language:
Finnish
Other Identifying Numbers:
Other: ON: DE98701757; CNN: Project TEKES-LIEKKI2-505; ISBN 951-650-955-X; TRN: FI9703587
Availability:
OSTI as DE98701757
Submitting Site:
FI
Size:
pp. 737-750
Announcement Date:

Citation Formats

Fogelholm, C J, Kankkunen, A, Nieminen, K, Laine, J, and Miikkulainen, P. Drop formation of black liquor spraying; Mustalipeaen pisaroituminen. Finland: N. p., 1997. Web.
Fogelholm, C J, Kankkunen, A, Nieminen, K, Laine, J, & Miikkulainen, P. Drop formation of black liquor spraying; Mustalipeaen pisaroituminen. Finland.
Fogelholm, C J, Kankkunen, A, Nieminen, K, Laine, J, and Miikkulainen, P. 1997. "Drop formation of black liquor spraying; Mustalipeaen pisaroituminen." Finland.
@misc{etde_531316,
title = {Drop formation of black liquor spraying; Mustalipeaen pisaroituminen}
author = {Fogelholm, C J, Kankkunen, A, Nieminen, K, Laine, J, and Miikkulainen, P}
abstractNote = {Black liquor is a spent liquor of the pulp and paper industry. It is burned in kraft recovery boilers for chemical and energy recovery. The high dry solids content and viscosity of black liquor require a high spraying temperature. This affects the performance of the boiler. Kraft recovery boiler deposit formation, emissions and chemical recovery are strongly affected by the drop size and the velocity of the black liquor spray formed by a splashplate nozzle. The sheet breakup mechanism is studied with a system based on a video and image-analysis. The drop size of mill-scale nozzles was measured also with an image-analysis-system. Measurements were carried out in a spray test chamber. The sheet breakup mechanism and drop size tests were carried out both below and over the boiling point of black liquor. Special attention was paid to the effect of flashing on drop formation. Temperature increase normally decreases drop size. In the temperature where the wavy-sheet disintegration changes to perforated-sheet disintegration the drop size increases. Spray velocity rises when the temperature is increased above the boiling point. (orig.)}
place = {Finland}
year = {1997}
month = {Oct}
}