Volume 9 Issue 1
Jan.  2019
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Article Navigation >  Journal of Environmental Engineering Technology  > 2019  >  9(1): 8-13
ZHANG Jianping, WAN Kaidi, WANG Rongtao, XU Chaoqun, JIA Weiwei, WANG Zhihua. Experimental study on ozone denitration of a biomass circulating fluidized bed boiler[J]. Journal of Environmental Engineering Technology, 2019, 9(1): 8-13. doi: 10.3969/j.issn.1674-991X.2019.01.002
Citation: ZHANG Jianping, WAN Kaidi, WANG Rongtao, XU Chaoqun, JIA Weiwei, WANG Zhihua. Experimental study on ozone denitration of a biomass circulating fluidized bed boiler[J]. Journal of Environmental Engineering Technology, 2019, 9(1): 8-13. doi: 10.3969/j.issn.1674-991X.2019.01.002
shu

Experimental study on ozone denitration of a biomass circulating fluidized bed boiler

doi: 10.3969/j.issn.1674-991X.2019.01.002

  • 1. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

  • 2. China Everbright Greentech Limited, Shenzhen 518040, China

More Information
  • Corresponding author: Kaidi WAN E-mail: wankaidi@zju.edu.cn
  • Received Date: 2018-10-08
  • Publish Date: 2019-01-20
    Abstract
  • In order to reveal the characteristics of reactive molecular ozone denitrification in biomass boilers, a flue gas ozone denitrification test was carried out on a biomass circulating fluidized bed (CFB) boiler using reactive molecular ozone ultra-low emission technology. A flue gas analyzer was used to measure the flue gas components at the positions before the injection of reactive molecular ozone and at the top of the chimney. The emission characteristics of flue gas pollutants before and after denitrification and the effect of ozone dosage on denitration were investigated. The results showed that the boiler load and the initial concentrations of pollutants such as CO and NOx fluctuated due to the strong random variation of moisture and calorific value of the biomass fuel. The averaged initial concentration of NOx in the flue gas was 146 mg/m3, while the highest value was 480 mg/m3. The instantaneous concentration of NOx had a very strong linear correlation with the oxygen content with the regression coefficient R2=0.96. With the increase of ozone dosage, the denitration efficiency increased from 24% at the ozone generator power level of 118 kW to 95% at 250 kW. After the application of reactive molecular ozone denitration technology, the NOx concentration in the flue gas stayed below 15 mg/m3 with the ozone generator power level of 250 kW, meeting the ultra-low emission standard.

     

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