Performance estimation of adjustable wall blower according to the entering distance of nozzle

Ilkwang Jang, Jae Ho Paek, Yong Hoon Jang

Research output: Contribution to journalArticle

Abstract

The soot blowing performance for a wall blower, according to the entering distance of a nozzle from the boiler wall, is evaluated according to a liquid droplet impingement erosion model. This erosion model incorporated the computational fluid dynamics of a jet steam of nozzle, and it uses the pressure and velocity of a jet steam at the furnace wall for several entering distances of the nozzle. A relative erosion rate dependent on the velocity of the jet steam is also introduced. Several cases are compared, as determined according to the entering distance and the number of nozzles. The shaded erosion region, according to the entering distance of the nozzle and the co-injected region, have also been schematized. Specifically, when the entering distance of the nozzle is large, the maximum relative erosion rate is small. However, the soot blowing area is uniformly large, as compared with the case of a small entering distance. This shows that the maximum relative erosion rate is high, but the soot blowing region is small and the shaded regions occur.

Original languageEnglish
Pages (from-to)531-536
Number of pages6
JournalJournal of the Korean Society for Precision Engineering
Volume35
Issue number5
DOIs
Publication statusPublished - 2018 May 1

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Blowers
Erosion
Nozzles
Soot
Blow molding
Steam
Boilers
Computational fluid dynamics
Furnaces
Liquids

All Science Journal Classification (ASJC) codes

  • Safety, Risk, Reliability and Quality
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Cite this

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title = "Performance estimation of adjustable wall blower according to the entering distance of nozzle",
abstract = "The soot blowing performance for a wall blower, according to the entering distance of a nozzle from the boiler wall, is evaluated according to a liquid droplet impingement erosion model. This erosion model incorporated the computational fluid dynamics of a jet steam of nozzle, and it uses the pressure and velocity of a jet steam at the furnace wall for several entering distances of the nozzle. A relative erosion rate dependent on the velocity of the jet steam is also introduced. Several cases are compared, as determined according to the entering distance and the number of nozzles. The shaded erosion region, according to the entering distance of the nozzle and the co-injected region, have also been schematized. Specifically, when the entering distance of the nozzle is large, the maximum relative erosion rate is small. However, the soot blowing area is uniformly large, as compared with the case of a small entering distance. This shows that the maximum relative erosion rate is high, but the soot blowing region is small and the shaded regions occur.",
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Performance estimation of adjustable wall blower according to the entering distance of nozzle. / Jang, Ilkwang; Paek, Jae Ho; Jang, Yong Hoon.

In: Journal of the Korean Society for Precision Engineering, Vol. 35, No. 5, 01.05.2018, p. 531-536.

Research output: Contribution to journalArticle

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