유기물자원화 (Journal of the Korea Organic Resources Recycling Association)

  • 제28권2호
  • /
  • Pages.49-57
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  • 2020
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  • 1225-6498(pISSN)
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  • 2508-3015(eISSN)
유기성자원학회 (Korea Organic Resources Recycling Association)
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석탄과 보조제로 바이오매스를 사용한 바이오 고형연료의 혼소 특성

Characteristics of the Co-Combustion of Coal and Bio-Solid Fuel using Biomass as an adjunct

  • 현완수 (인천대학교 환경에너지공학과) ;
  • 진용균 (인천대학교 환경에너지공학과) ;
  • 조은지 (인천대학교 환경에너지공학과) ;
  • 한현구 (인천대학교 환경에너지공학과) ;
  • 민선웅 (인천대학교 환경에너지공학과) ;
  • 여운호 (인천대학교 환경에너지공학과)
  • Hyeon, Wan-Su (Department of Environmental and Energy Engineering) ;
  • Jin, Yong-Gyun (Department of Environmental and Energy Engineering) ;
  • Jo, Eun-Ji (Department of Environmental and Energy Engineering) ;
  • Han, Hyun-Goo (Department of Environmental and Energy Engineering) ;
  • Min, Seon-Ung (Department of Environmental and Energy Engineering) ;
  • Yeo, Woon-Ho (Department of Environmental and Energy Engineering)
  • 투고 : 2020.05.19
  • 심사 : 2020.06.17
  • 발행 : 2020.06.30
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초록

하수 슬러지는 수분 함량이 높고, 발열량이 낮아 하수 슬러지를 에너지원으로 사용하는데 어려움이 있다. 이런 하수 슬러지 특성을 개선하고, 화석 연료를 대체하기 위해 하수 슬러지와 목질계 바이오매스를 혼합한 바이오 고형연료를 생산하는 연구를 행하였다. 열중량 분석은 석탄과 5%, 10%, 15%의 바이오 고형연료를 각각 혼합하여 혼소할 경우 발생되는 특징을 연구하는 데에 활용되었다. 이 분석은 10℃/min씩 25℃에서 900℃까지 내부 온도를 올리는 비등온 조건하에서 수행되었다. 석탄 단일 시료를 석탄과 바이오 고형연료가 혼합된 시료와 비교하였을 경우 연소개시온도는 약간 변화가 일어났다. 하지만, 연소최대온도와 연소종료개시온도는 변화가 거의 없었다. 연소개시는 200 ~ 315 ℃에서 이뤄졌으며, 중량변화가 급격히 일어나는 열분해는 350 ~ 700 ℃에서 이뤄졌다. 혼소 반응속도 분석 결과 활성화 에너지는 혼합율이 높아질수록 낮아졌다. 그러므로 화력발전소에서 석탄과 바이오 고형연료를 혼소하는 것이 가능할 수 있을 것이다.

Due to the sewage sludge's characteristics of high water content and low calorific value, it is hard to use sewage sludge as an energy source. In this study, we investigated production of bio-solid fuel which is mixed both sewage sludge and woody biomass in order to improve the sewage sludge's characteristics and replace fossil fuels. A thermogravimetric analysis was used to investigate the co-combustion characteristics of the mixed coal and bio-solid fuel of 5%, 10%, 15%, respectively. The analysis was carried out under non-isothermal conditions by raising the internal temperature of 25℃ to 900℃ with an increment of 10℃/min. In the case of comparing single coal sample and mixture sample of coal and bio-solid fuel, the initiation combustion temperature has slightly changed. However, both the maximum combustion temperature and the termination start combustion temperature were hardly noticeable. The initiation combustion was occurred between 200~315℃ and the thermal decomposition causing a significant weight change occurred between 350~700℃. As a result of the kinetic analysis of the co-combustion, the activation energy was decreased as the mixing rate was higher. Therefore, it is able to co-combust the mixed coal and bio-solid fuel in power plants.

키워드

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