Fan Z.-Z.,Beijing Shengbang Tianye Technology Ltd Company |
Zhao Y.-L.,Beijing Shengbang Tianye Technology Ltd Company |
Zhao H.-N.,Beijing Shengbang Tianye Technology Ltd Company |
Zhao H.-N.,Tianjin United Environmental Engineering Design Co. |
And 4 more authors.
Huanjing Kexue/Environmental Science | Year: 2014
Electrical low pressure impactor (ELPI) was used to online analyze the PM2.5 particle size and mass concentration distribution in the trapping field and ore tank of blast furnace iron-making plant. Results showed that the grain number concentration of PM2.5 in trapping field after dust removal was in the range of 105-106cm-3, and the particle size was mainly below 0.1 μm. While the grain number concentration of the PM2.5 in ore tank after dust removal was in the range of 104-105 cm-3, the particle size was mainly below 1.0 μm, and the mass concentration distribution showed a single peak. The micro-morphology of PM2.5 monomer was mainly divided into two categories, spherical particles and irregular aggregates. Chemical composition analysis indicated that the concentrations of water soluble SO4 2-, K+, Ca2+ were higher than other ions in PM2.5, with the percentage of 10.32%-28.55%, 10.36%-12.15%, 3.97%-15.4%, respectively. The major elements was Fe, Si, Al, with 16.8%-31.62%, 2.24%-8.76%, 1.24%-5.89% of total mass, respectively; organic carbon and elementary carbon were 2.7%-4.6% and 0.8%-1.3%, respectively. The emission factors of PM2.5 in trapping field and in ore tank after dust removal were ranged from 0.045 to 0.085 kg·t-1 and 0.042 to 0.071 kg·t-1, respectively.
Zhao Y.,Beijing Shengbang Tianye Technology Ltd Company |
Zhao H.,Beijing Shengbang Tianye Technology Ltd Company |
Zhao H.,Tianjin United Environmental Protection Engineering Design Co. |
Fan Z.,Beijing Shengbang Tianye Technology Ltd Company |
And 3 more authors.
Chinese Journal of Environmental Engineering | Year: 2015
Through ELPI (electrical low-pressure impactor) based dilution sampling system, the emission characteristics of PM2.5 was studied experimentally at sintering machine head, sintering machine tail, burden and whole grain. Results showed the characteristics of PM2.5 particle size distribution and mass concentration distribution discharged from test points. The desulfurization process should be optimized, for the mass concentration of PM2.5 was reduced after desulfurization, but the concentration of the grain number increased. The micro-morphology of PM2.5 monomer was divided to four categories: spherical particles, ultrafine particles, soot particles and irregular aggregates. Chemical composition analysis indicated that PM2.5was largely composed of sulfate, organic carbon, elementary carbon, and Fe, with mass fraction of 2.65%~10.76%,6.15%~12.6%,3.05%~10.05% and 4.14%~26.78%, respectively. ©, 2015, Science Press. All right reserved.