Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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Economic Evaluation of a Crush-screen Hybrid Pretreatment Process for Waste Vinyl

폐비닐의 파쇄/선별 융합 전처리 공정의 경제성 평가

  • Seo, Su Been (Department of Mineral resources and energy engineering, Chonbuk National University) ;
  • Cho, Il Ho (C.I. Ecotech) ;
  • Yun, Hyun Pyo (C.I. Ecotech) ;
  • Kang, Seo Yeong (Department of Mineral resources and energy engineering, Chonbuk National University) ;
  • Kim, Hyung Woo (Department of Mineral resources and energy engineering, Chonbuk National University) ;
  • Lee, See Hoon (Department of Mineral resources and energy engineering, Chonbuk National University)
  • 서수빈 (전북대학교 자원에너지공학과) ;
  • 조일호 ((주)씨아이에코텍) ;
  • 윤현표 ((주)씨아이에코텍) ;
  • 강서영 (전북대학교 자원에너지공학과) ;
  • 김형우 (전북대학교 자원에너지공학과) ;
  • 이시훈 (전북대학교 자원에너지공학과)
  • Received : 2019.08.23
  • Accepted : 2019.09.09
  • Published : 2019.12.31
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Abstract

Though the usage of vinyls and plastics produced from fossil fuels has been increasing in the world, the eco-friendly domestic disposal or recycling of waste vinyls has to be executed because the migration or importation of waste vinyls or waste plastics are globally prohibited. Even though the eco-friendly domestic disposal or recycling of waste vinyls and waste plastics should be developed, promising eco-friendly recycling methods are few because there are extraneous substances in waste vinyls and waste plastics. Also, conventional incineration and landfill methods result in secondary contamination and then increase disposal costs. Therefore, the selective elimination of extraneous substances or other materials included in waste vinyls and waste plastics could make valuable recycling or reuse possible. In particular, the novel hybrid process in which crushing and screening are simultaneously conducted in a rotary kiln type reactor can domestically maximize the material recycling or reuse. In this study, the feasibility study for a crushing/screening hybrid process developed in Korea was performed and evaluated in case of thermal recycling (TR) and material recycling (MR). The effect of various subsidies on economic efficiency was especially evaluated by means of domestic recycling plans. The incentive revenues from waste vinyl recycling and the incineration share of waste vinyls affected the net present values and internal rate of returns of the hybrid process.

비닐, 플라스틱의 사용이 전 세계에서 지속적으로 증가하고 있으나, 세계 각국의 폐비닐 또는 폐플라스틱의 처리를 위한 수입이 금지됨에 따라 자국 내의 친환경적 처리 또는 이용이 요구되고 있다. 폐비닐, 폐플라스틱의 친환경적인 처리에 대한 수요가 점차 증가하고 있으나, 폐비닐에 묻어 있는 이물질로 인하여 환경친화적인 재활용 방법이 제한되고 있다. 또한 기존의 매립, 소각 방법은 2차 오염의 발생과 처리 비용의 증가를 야기시키고 있다. 따라서 폐비닐에 포함되어 있는 타재질 및 이물질의 선별 제거는 폐비닐의 고부가가치 재활용을 가능케 할 수 있다. 특히 파쇄/선별이 단일 기기에서 동시에 이루어지는 신공정은 자원 재활용을 극대화시킨다. 본 연구는 파쇄/선별 융합 공정을 통해 이루어지는 폐비닐의 분리, 열적 재활용, 물질 재활용의 기술경제성을 평가하였다. 특히 국내 환경 정책에 따른 다양한 지원금들의 변화가 미치는 영향을 고찰하였다. 재활용 인센티브의 가격과 소각에 참여하는 폐비닐의 수율에 따라서 순현재가치와 내부수익률이 크게 변동되었다.

Keywords

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