Particle and aerosol research (한국입자에어로졸학회지)

Korean Association for Particle and Aerosol Research (한국입자에어로졸학회)
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SOx and NOx removal performance by a wet-pulse discharge complex system

습식-펄스방전 복합시스템의 황산화물 및 질소산화물 제거성능 특성

  • Park, Hyunjin (R&D Department, BellE&C Co., Ltd.) ;
  • Lee, Whanyoung (R&D Department, BellE&C Co., Ltd.) ;
  • Park, Munlye (R&D Department, BellE&C Co., Ltd.) ;
  • Noh, Hakjae (R&D Department, BellE&C Co., Ltd.) ;
  • You, Junggu (R&D Department, BellE&C Co., Ltd.) ;
  • Han, Bangwoo (Environmental and Energy System Research Division, Korea Institute of Machinery & Materials) ;
  • Hong, Keejung (Environmental and Energy System Research Division, Korea Institute of Machinery & Materials)
  • 박현진 ((주)벨이앤씨 기술연구소) ;
  • 이환영 ((주)벨이앤씨 기술연구소) ;
  • 박문례 ((주)벨이앤씨 기술연구소) ;
  • 노학재 ((주)벨이앤씨 기술연구소) ;
  • 유정구 ((주)벨이앤씨 기술연구소) ;
  • 한방우 (한국기계연구원 환경기계시스템연구실) ;
  • 홍기정 (한국기계연구원 환경기계시스템연구실)
  • Received : 2019.03.04
  • Accepted : 2019.03.26
  • Published : 2019.03.31
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Abstract

Current desulfurization and denitrification technologies have reached a considerable level in terms of reduction efficiency. However, when compared with the simultaneous reduction technology, the individual reduction technologies have issues such as economic disadvantages due to the difficulty to scale-up apparatus, secondary pollution from wastewater/waste during the treatment process, requirement of large facilities for post-treatment, and increased installation costs. Therefore, it is necessary to enable practical application of simultaneous SOx and NOx treatment technologies to remove two or more contaminants in one process. The present study analyzes a technology capable of maintaining simultaneous treatment of SOx and NOx even at low temperatures due to the electrochemically generated strong oxidation of the wet-pulse complex system. This system also reduces unreacted residual gas and secondary products through the wet scrubbing process. It addresses common problems of the existing fuel gas treatment methods such as SDR, SCR, and activated carbon adsorption (i.e., low treatment efficiency, expensive maintenance cost, large installation area, and energy loss). Experiments were performed with varying variables such as pulse voltage, reaction temperature, chemicals and additives ratios, liquid/gas ratio, structure of the aeration cleaning nozzle, and gas inlet concentration. The performance of individual and complex processes using the wet-pulse discharge reaction were analyzed and compared.

Keywords

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Fig. 1. Shape and overall configuration of the experimental apparatus.

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Fig. 2. Configuration and internal structure of the pulse discharge system.

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Fig. 3. Configuration and internal structure of the wet reaction system.

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Fig. 4. Shape and structure of the aeration cleaning nozzle for the wet reaction system.

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Fig. 5. Schematic diagram of the experimental apparatus.

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Fig. 6. Sample shape and structure of the aeration cleaning nozzle.

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Fig. 7. Distribution of bubble fraction of the aeration cleaning nozzle.

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Fig. 8. NO removal performance of the pulse reaction system according to reaction temperature and additive conditions.

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Fig. 9. NO removal performance of the wet-pulse complex system according to reducing agent molar ratio.

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Fig. 10. Changes in SO2 outlet concentration in the pulse reaction system according to additive(NH3) ratio.

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Fig. 11. Comparison between removal performances of individual SO2, NH3 and complex cleaning reactions of the wet reaction system.

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Fig. 12. Comparison of the NH3 slip removal performance of the wet-pulse discharge complex system.

Table 1. Specifications of the pulse discharge system.

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Table 2. Specifications of the wet reaction system.

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Table 3. Experimental conditions.

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Table 4. Flow analysis results of the aeration cleaning nozzle.

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