Effects of Cofiring Coal and Biomass Fuel on the Pulverized Coal Injection Combustion Zone in Blast Furnaces
CO<sub>2</sub> emissions are a major contributor to global warming. Biomass combustion is one approach to tackling this issue. Biomass is used with coal combustion in thermal power plants or with blast furnaces (BFs) because it is a carbon-neutral fuel; therefore, biomass provides the ad...
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MDPI AG
2022-01-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/2/655 |
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| author | Gyeong-Min Kim Jae Hyung Choi Chung-Hwan Jeon Dong-Ha Lim |
| author_facet | Gyeong-Min Kim Jae Hyung Choi Chung-Hwan Jeon Dong-Ha Lim |
| author_sort | Gyeong-Min Kim |
| collection | DOAJ |
| description | CO<sub>2</sub> emissions are a major contributor to global warming. Biomass combustion is one approach to tackling this issue. Biomass is used with coal combustion in thermal power plants or with blast furnaces (BFs) because it is a carbon-neutral fuel; therefore, biomass provides the advantage of reduced CO<sub>2</sub> emissions. To examine the effect of co-firing on pulverized coal injection (PCI) in BFs, two coals of different ranks were blended with the biomass in different proportions, and then their combustion behaviors were examined using a laminar flow reactor (LFR). The PCI combustion primarily functions as a source of heat and CO to supply the upper part of the BF. To create a similar PCI combustion environment, the LFR burner forms a diffusion flat flame with an oxygen concentration of 26% with a flame temperature of ~2000–2250 K at a heating rate of 10<sup>5</sup> K/s. The combustion characteristics, such as the flame structure, burning coal particle temperature, unburned carbon (UBC), and CO and CO<sub>2</sub> emissions were measured to evaluate their effect on PCI combustion. With the increase in the biomass blending ratio, the brightness of the volatile cloud significantly increased, and the particle temperature tended to decrease. The fragmentation phenomenon, which was observed for certain coal samples, decreased with the increase in the biomass blending ratio. In particular, with an increase in the biomass blending ratio, the optimum combustion point occurred, caused by the fragmentation of coal and volatile gas combustion of biomass. |
| first_indexed | 2024-03-10T01:33:00Z |
| format | Article |
| id | doaj.art-cf3c00963f7a430fab4394b933a00ff3 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T01:33:00Z |
| publishDate | 2022-01-01 |
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| series | Energies |
| spelling | doaj.art-cf3c00963f7a430fab4394b933a00ff32023-11-23T13:39:57ZengMDPI AGEnergies1996-10732022-01-0115265510.3390/en15020655Effects of Cofiring Coal and Biomass Fuel on the Pulverized Coal Injection Combustion Zone in Blast FurnacesGyeong-Min Kim0Jae Hyung Choi1Chung-Hwan Jeon2Dong-Ha Lim3Green Materials and Processes R&D Group, Korea Institute of Industrial Technology, Ulsan 44413, KoreaGreen Materials and Processes R&D Group, Korea Institute of Industrial Technology, Ulsan 44413, KoreaSchool of Mechanical Engineering, Pusan National University, Busan 46241, KoreaGreen Materials and Processes R&D Group, Korea Institute of Industrial Technology, Ulsan 44413, KoreaCO<sub>2</sub> emissions are a major contributor to global warming. Biomass combustion is one approach to tackling this issue. Biomass is used with coal combustion in thermal power plants or with blast furnaces (BFs) because it is a carbon-neutral fuel; therefore, biomass provides the advantage of reduced CO<sub>2</sub> emissions. To examine the effect of co-firing on pulverized coal injection (PCI) in BFs, two coals of different ranks were blended with the biomass in different proportions, and then their combustion behaviors were examined using a laminar flow reactor (LFR). The PCI combustion primarily functions as a source of heat and CO to supply the upper part of the BF. To create a similar PCI combustion environment, the LFR burner forms a diffusion flat flame with an oxygen concentration of 26% with a flame temperature of ~2000–2250 K at a heating rate of 10<sup>5</sup> K/s. The combustion characteristics, such as the flame structure, burning coal particle temperature, unburned carbon (UBC), and CO and CO<sub>2</sub> emissions were measured to evaluate their effect on PCI combustion. With the increase in the biomass blending ratio, the brightness of the volatile cloud significantly increased, and the particle temperature tended to decrease. The fragmentation phenomenon, which was observed for certain coal samples, decreased with the increase in the biomass blending ratio. In particular, with an increase in the biomass blending ratio, the optimum combustion point occurred, caused by the fragmentation of coal and volatile gas combustion of biomass.https://www.mdpi.com/1996-1073/15/2/655laminar flow reactor (LFR)blast furnace (BF)pulverized coal injection (PCI)co-firingfragmentationparticle temperature |
| spellingShingle | Gyeong-Min Kim Jae Hyung Choi Chung-Hwan Jeon Dong-Ha Lim Effects of Cofiring Coal and Biomass Fuel on the Pulverized Coal Injection Combustion Zone in Blast Furnaces Energies laminar flow reactor (LFR) blast furnace (BF) pulverized coal injection (PCI) co-firing fragmentation particle temperature |
| title | Effects of Cofiring Coal and Biomass Fuel on the Pulverized Coal Injection Combustion Zone in Blast Furnaces |
| title_full | Effects of Cofiring Coal and Biomass Fuel on the Pulverized Coal Injection Combustion Zone in Blast Furnaces |
| title_fullStr | Effects of Cofiring Coal and Biomass Fuel on the Pulverized Coal Injection Combustion Zone in Blast Furnaces |
| title_full_unstemmed | Effects of Cofiring Coal and Biomass Fuel on the Pulverized Coal Injection Combustion Zone in Blast Furnaces |
| title_short | Effects of Cofiring Coal and Biomass Fuel on the Pulverized Coal Injection Combustion Zone in Blast Furnaces |
| title_sort | effects of cofiring coal and biomass fuel on the pulverized coal injection combustion zone in blast furnaces |
| topic | laminar flow reactor (LFR) blast furnace (BF) pulverized coal injection (PCI) co-firing fragmentation particle temperature |
| url | https://www.mdpi.com/1996-1073/15/2/655 |
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