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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;Lee, Whanyoung;Park, Munlye;Noh, Hakjae;You, Junggu;Han, Bangwoo;Hong, Keejung
박현진;이환영;박문례;노학재;유정구;한방우;홍기정

  • Received : 2019.03.04
  • Accepted : 2019.03.26
  • Published : 2019.03.31

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

Desulfurization;Denitrification;Precursor;Pulse plasma;Wet-scrubber;Low-back pressure nozzle

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Acknowledgement

Grant : 중소 산업공정의 황산화물, 질소산화물 및 2차생성물 처리를 위한 습식 펄스 복합공정 개발

Supported by : 환경부