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Volume 40 Issue 9
Nov.  2022
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Article Navigation >  ENVIRONMENTAL ENGINEERING  > 2022  >  40(9): 186-191
SUN Ye, PANG Lin-lin, LI Jie, LIU Yong, HU Xiao-tu, LI Xiao-bin, ZHU Tian-le. NITROGEN BALANCE OF OZONE A COMBINED DENITRATION PROCESS OF DEEP OXIDATION AND LIQUID-PHASE ABSORPTION: A CASE STUDY ON A 300 m2 SINTERING FLUE GAS OF AN IRON ＆ STEEL COMPANY[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(9): 186-191. doi: 10.13205/j.hjgc.202209025
Citation: SUN Ye, PANG Lin-lin, LI Jie, LIU Yong, HU Xiao-tu, LI Xiao-bin, ZHU Tian-le. NITROGEN BALANCE OF OZONE A COMBINED DENITRATION PROCESS OF DEEP OXIDATION AND LIQUID-PHASE ABSORPTION: A CASE STUDY ON A 300 m2 SINTERING FLUE GAS OF AN IRON ＆ STEEL COMPANY[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(9): 186-191. doi: 10.13205/j.hjgc.202209025
shu

NITROGEN BALANCE OF OZONE A COMBINED DENITRATION PROCESS OF DEEP OXIDATION AND LIQUID-PHASE ABSORPTION: A CASE STUDY ON A 300 m2 SINTERING FLUE GAS OF AN IRON ＆ STEEL COMPANY

doi: 10.13205/j.hjgc.202209025

  • 1. School of Space and Environment, Beihang University, Beijing 102206, China;

  • 2. Yanshan Iron and Steel Co., Ltd, Tangshan 064300, China;

  • 3. Guangdong J-Tech Environment Science Co., Ltd, Guangzhou 510663, China

  • Received Date: 2022-02-09
    Available Online: 2022-11-09
    Abstract
  • Ozone deep oxidation combined with wet absorption technology has been successfully applied to many sets of ultra-low emission treatment projects for large-scale sintering flue gas, and running stably for many years. However, there is no consensus on whether the oxidation products can be efficiently transmitted from the gas phase to the liquid phase, and whether the nitrogen balance can be realized when the flue gas passing through the absorption system. Therefore, one ozone deep oxidation combined with wet absorption project for 300 m2 sintering flue gas in an iron and steel company was taken as an example, and this study established a nitrogen balance research method with clear nitrogen balance boundary, specific nitrogen input, output and accumulation items, and less dynamic parameters. Based on this method, the nitrogen balance was studied. The results showed that the nitrogen conversion rate of the system was 96.4%, which showed that NOx in flue gas could be efficiently absorbed after ozone deep oxidation. Gaseous NOx entered and discharged from the desulfurization and denitration system with flue gas, NO3- entered the desulfurization and denitration system accompanying flushing water or discharged accompanying gypsum, NO3- accumulated in the absorption tower and buffer tank were the most critical nitrogen input, output and accumulation items, which were also the main items to be considered in the actual project.
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