대한환경공학회지 (Journal of Korean Society of Environmental Engineers)

  • 제36권2호
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  • Pages.103-108
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  • 2014
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  • 1225-5025(pISSN)
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  • 2383-7810(eISSN)
대한환경공학회 (Korean Society of Environmental Engineers)
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석탄과 슬러지의 예혼합연소에 따른 산성가스 배출특성

Characteristics of Acidic Gas Emissions from Combustion with Preblending of Coal and Sludge

  • 심성훈 (한국기계연구원 환경에너지연구본부) ;
  • 정상현 (한국기계연구원 환경에너지연구본부) ;
  • 민효기 (충북대학교 환경공학과) ;
  • 이상섭 (충북대학교 환경공학과)
  • Shim, Sung-Hoon (Environmental and Energy Research Division, Korea Institute of Machinery & Materials) ;
  • Jeong, Sang-Hyun (Environmental and Energy Research Division, Korea Institute of Machinery & Materials) ;
  • Min, Hyo-Ki (Department of Environmental Engineering, Chungbuk National University) ;
  • Lee, Sang-Sup (Department of Environmental Engineering, Chungbuk National University)
  • 투고 : 2013.02.06
  • 심사 : 2014.01.20
  • 발행 : 2014.02.28
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초록

하수슬러지의 해양투기 규제에 따른 처리대안으로 석탄화력발전소 보조연료로서의 활용이 제안되고 있다. 슬러지를 석탄과 혼합하여 사용한다면 연료의 조성변화로 인하여 산성가스의 배출특성이 달라질 것으로 예상된다. 본 연구에서는 국내 하수처리장 7곳에서 발생한 하수슬러지를 수거하여 석탄과 혼합한 뒤 실험실 규모의 연소로에서 연소시킨 후 배출되는 질소산화물($NO_x$), 이산화황($SO_2$), 염화수소(HCl), 염소($Cl_2$) 가스를 분석하였다. $NO_x$는 슬러지 혼합에 따른 배출농도 변화가 가장 작았고, $SO_2$는 슬러지를 혼합하여 연소하였을 때 석탄 연소가스와 비교하여 높은 배출농도 증가를 보였다. HCl + $Cl_2$는 슬러지의 염소함량에 따라 서로 다른 배출농도를 보였다.

Using dried sludge as a secondary fuel of a coal-fired power plant is proposed as an alternative option for sludge disposal. Because elemental contents of sludge are different from those of coal, different levels of acidic gas emissions are expected from the co-combustion of sludge with coal. In this study, sludge samples were obtained from 7 sewage treatment plants in Korea. Each sludge sample was combusted together with coal in a lab-scale combustor, and the concentrations of nitrogen oxides ($NO_x$), sulfur dioxide ($SO_2$), hydrogen chloride (HCl), chlorine ($Cl_2$) in the flue gas were analyzed. Compared to the combustion of coal only, $NO_x$ concentration was slightly higher in the flue gas from the co-combustion of coal and sludge. $SO_2$ emission increased with the combustion of sludge due to the higher content of sulfur in sludge than in coal. For most of the tested samples, the concentrations of HCl and $Cl_2$ were varied depending on the chlorine content in the sludge sample.

키워드

참고문헌

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피인용 문헌

  1. Behaviour of Condensing Gaseous Species by Injection of Liquid Adsorbents (HMDS) in Combustion Facility vol.37, pp.5, 2015, https://doi.org/10.4491/KSEE.2015.37.5.285