Particle size distribution and enrichment of selected metals from waste sludge combustion at air and oxy-fuel combustion

Ha Na Jang, Jin Ho Sung, Seung Ki Back, Hang Seok Choi, Yongchil Seo

Research output: Contribution to conferencePaper

Abstract

Comparative tests in air and oxy-fuel combustion with oxygen injection rates ranging from 21% to 40% were conducted in a 30kWth circulating fluidized bed (CFB) pilot plant for waste sludge combustion. General combustion characteristics of the CFB such as pressure profiles, temperatures along the bed, and flue-gas composition, were different under the air and oxy-fuel conditions with various oxygen injection rates. Based on the results, the optimal oxygen injection rate was determined as 25% for the oxy-fuel combustion. In the bottom and fly ash, alkali and heavy metals had different distribution under the air and oxy-fuel combustion conditions. The particle size distribution in fly ash from air combustion was dominated by coarse particles over 2.5 |im in size, whereas with oxy-fuel combustion, most particles were submicron in size approximately 0.1 μm, and a smaller amount of coarse particles over 2.5 pμm in size formed than with air combustion. Mass fractions of Al, Ca, and K below 2.5 p.m in size found in the ashes from oxy-fuel combustion were higher than those in air combustion were. Submicron particle formation from the Cr, Ni, Cu, and Zn in the fly ash occurred more during oxy-fuel combustion than it did in air combustion.

Original languageEnglish
Pages517-523
Number of pages7
Publication statusPublished - 2017 Jan 1
Event12th International Conference on Fluidized Bed Technology, CFB 2017 - Krakow, Poland
Duration: 2017 May 232017 May 26

Other

Other12th International Conference on Fluidized Bed Technology, CFB 2017
CountryPoland
CityKrakow
Period17/5/2317/5/26

Fingerprint

Particle size analysis
Metals
Air
Coal Ash
Fly ash
Oxygen
Ashes
Fluidized beds
Alkali Metals
Alkali metals
Heavy Metals
Pilot plants
Flue gases
Heavy metals

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Filtration and Separation
  • Fluid Flow and Transfer Processes
  • Energy Engineering and Power Technology

Cite this

Jang, H. N., Sung, J. H., Back, S. K., Choi, H. S., & Seo, Y. (2017). Particle size distribution and enrichment of selected metals from waste sludge combustion at air and oxy-fuel combustion. 517-523. Paper presented at 12th International Conference on Fluidized Bed Technology, CFB 2017, Krakow, Poland.
Jang, Ha Na ; Sung, Jin Ho ; Back, Seung Ki ; Choi, Hang Seok ; Seo, Yongchil. / Particle size distribution and enrichment of selected metals from waste sludge combustion at air and oxy-fuel combustion. Paper presented at 12th International Conference on Fluidized Bed Technology, CFB 2017, Krakow, Poland.7 p.
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Jang, HN, Sung, JH, Back, SK, Choi, HS & Seo, Y 2017, 'Particle size distribution and enrichment of selected metals from waste sludge combustion at air and oxy-fuel combustion' Paper presented at 12th International Conference on Fluidized Bed Technology, CFB 2017, Krakow, Poland, 17/5/23 - 17/5/26, pp. 517-523.

Particle size distribution and enrichment of selected metals from waste sludge combustion at air and oxy-fuel combustion. / Jang, Ha Na; Sung, Jin Ho; Back, Seung Ki; Choi, Hang Seok; Seo, Yongchil.

2017. 517-523 Paper presented at 12th International Conference on Fluidized Bed Technology, CFB 2017, Krakow, Poland.

Research output: Contribution to conferencePaper

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Jang HN, Sung JH, Back SK, Choi HS, Seo Y. Particle size distribution and enrichment of selected metals from waste sludge combustion at air and oxy-fuel combustion. 2017. Paper presented at 12th International Conference on Fluidized Bed Technology, CFB 2017, Krakow, Poland.