Experimental study on the characteristics of particulate matter emitted from a 440 t/h CFB coal-fired boiler

Fei Xu, Zhong Yang Luo, Peng Wang, Quan Hui Hou, Meng Xiang Fang, Ke Fa Cen

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15 Scopus citations


Particulate matter (PM) samplings were carried out at the inlet and outlet of electrostatic precipitator(ESP) of a large scale 440 t/h circulating fluidized bed boiler (CFBB). Effects of different combustion conditions(including coal compositions, boiler loads, n(Ca)/n(S) and oxygen concentrations) on the characteristics of PM emissions during coal combustion were investigated. The results show that the size-dependent dust removal efficiency of ESP is less than 90% for the submicron particles, resulted to high percentage (about 70%-90%) of inhalable particles in PM emissions. With the raising of ash percentage in coal and boiler load, PM emission increases while the dust removal efficiency of ESP decreases. With limestone added, PM emissions also increase. CaO effects on the coalescence and aggregation of particles to some degree, resulted to the increase of coarse particle percentage and d(0.5) from 35.25 μm to 48.50 μm at the inlet of ESP. With raising of oxygen concentration, the size distribution of PM emissions is becoming smaller while PM1, PM2.5 and PM10 emissions increase.

Original languageEnglish
Pages (from-to)7-11
Number of pages5
JournalZhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
Issue number29
StatePublished - 15 Oct 2007
Externally publishedYes


  • Circulating fluidized bed boiler
  • Combustion condition
  • Dust removal efficiency
  • Electrostatic precipitator
  • PM


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