Burning characteristics of single particles of coal and wood mixtures for co-firing in an upward-flowing hot gas stream

Cited 11 time in webofscience Cited 0 time in scopus
  • Hit : 469
  • Download : 0
This study presents the comparative burning behaviours of single solid particles of coal and biomass mixtures for co-firing. In this experimental investigation, a direct observation approach was used to investigate the ignition, flame characteristics and combustion times by means of high-speed photography at 7000 frames per second. Single particles were entrained into a hot gas stream at 1340 K and a rapid heating rate of 10(4)-10(5) K/s. The apparent volatile flames from the prepared particle size groups were observed within 20-50 ms. To assess the effect of oxygen concentration, particles were burned for their flame characteristics in a range of 10%-40% O-2. The test particles were sieved into three size groups (215-255 mu m, 255-300 mu m and 300-350 mu m) to assess the effect of particle size. Special particles for the co-firing effect were collected individually from two types of mixed pellet: 20:80 and 50:50 coal/wood. Pure sub-bituminous coal and wood particles were also prepared in order to compare their combustion behaviours. In the experimental setup with a cross-injection configuration, sequential combustion processes were effectively and clearly described in terms of particle displacement with time. The experimental results showed distinguishable flame characteristics from single particles of coal, 50:50 coal/wood, 20:80 coal/wood and wood, including soot flame size and intensity. The impact of high coal-blending ratio caused an increase in the flame size and intensity and the ignition time was close to that of pure coal particles. Quantitative measurements of combustion events on co-firing particles were also discussed in relation to significant impacts of the particle size and the oxygen concentration. (C) 2017 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2017-08
Language
English
Article Type
Article
Keywords

FIRED POWER-PLANT; PULVERIZED COAL; COMBUSTION BEHAVIOR; BIOMASS COCOMBUSTION; O-2/CO2 ATMOSPHERES; HIGH-TEMPERATURES; THERMAL-BEHAVIOR; FUEL PROPERTIES; DOMESTIC STOVE; SOLID FUELS

Citation

FUEL PROCESSING TECHNOLOGY, v.163, pp.20 - 34

ISSN
0378-3820
DOI
10.1016/j.fuproc.2017.03.030
URI
http://hdl.handle.net/10203/224022
Appears in Collection
ME-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 11 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0