Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Feasibility Study on Use of Livestock Manure as Solid Refuse Fuel by Torrefaction Method

반탄화 기술을 이용한 가축분뇨의 고형연료화 가능성 연구

  • Lee, Yongho (Department of Environment Energy Engineering, Graduate School of Energy & Environment, Seoul National University of Science & Technology) ;
  • Sanjusren, Oyun-Erdene (Department of Environment Energy Engineering, Graduate School of Energy & Environment, Seoul National University of Science & Technology) ;
  • Pak, Daewon (Department of Environment Energy Engineering, Graduate School of Energy & Environment, Seoul National University of Science & Technology)
  • 이용호 (서울과학기술대학교 에너지환경대학원 에너지환경공학과) ;
  • 어용 에르덴 (서울과학기술대학교 에너지환경대학원 에너지환경공학과) ;
  • 박대원 (서울과학기술대학교 에너지환경대학원 에너지환경공학과)
  • Received : 2019.04.24
  • Accepted : 2019.06.27
  • Published : 2019.06.30
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Abstract

In the study, used torrefaction method to make sample from organic waste of livestock manure for Biomass-solid refuse fuel feasibility study of torrefied materials. Fallen leaves and sawdust added in torrefaction methods with livestock manure, that additives were used to improve the lower calorific value of livestock manure. During the torrefaction experiment, the reaction temperature was varied from $200^{\circ}C$ to $260^{\circ}C$ and $20^{\circ}C$ to prepare a sample. The reaction time was divided into 15, 30 and 45min to determine the effect of the experimental conditions on the torrified products. The additives were mixed at a ratio of 9:1 and 8:2 (Cow manure: additive) relative to the livestock manure. Through this experiment, it was obtained 3,500 kcal/kg standard product of solid fuel produced in Korea and improved product was obtained by adding additives.

본 논문은 유기성 폐자원의 하나인 가축분뇨(우분)를 사용하여 고형연료화 가능성을 연구하고자 하였으며 생성물 제작 시 반탄화 방법을 이용하였다. 우분의 낮은 발열량을 개선하기 위해 첨가물을 사용하였으며 첨가물은 임업부산물인 톱밥과 계설성 폐기물인 낙엽을 사용하여 폐기물을 자원화 하고자 하였다. 반탄화 실험 진행 시 반응온도는 $200-260^{\circ}C$까지 $20^{\circ}C$씩 차이를 두어 생성물을 제작하였으며 반응시간은 15분, 30분, 45분으로 나누어 생성물을 제작 후 실험 조건이 반탄화 생성물에 미치는 영향을 알고자 하였다. 첨가물은 우분 대비 9:1, 8:2(우분:첨가물)의 비율로 섞어 시료 제작 후 반응생성물을 제작하였다. 본 실험을 통해 우리나라 고형연료제품 기준인 3,500 kcal/kg에 준하는 생성물을 얻을 수 있었으며, 첨가물을 추가하여 개선된 생성물을 얻을 수 있었다.

Keywords

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Fig 1. Schematic diagram of torrefaction reactor.

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Fig 2. Moisture analysis of torrefied products a) cow manure, b) cow manure and sawdust mixture(9:1), c) cow manure and fallen leaves mixture(9:1), d) cow manure and sawdust mixture(8:2), e) cow manure and fallen leaves mixture(8:2).

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Fig 3. High heating value(HHV) analysis of torrefied products a) cow manure, b) cow manure and sawdust mixture(9:1), c) cow manure and fallen leaves mixture(9:1), d) cow manure and sawdust mixture(8:2), e) cow manure and fallen leaves mixture(8:2).

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Fig 4. FT-IR analysis of products a) Raw products, b) Torrefied products of torrefaction reaction in 260℃, 45min.

Table 1. Physical and chemical composition of livestock manure

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Table 2. Physical and chemical composition of sawdust

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Table 3. Physical and chemical composition of fallen leaves

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Table 4. Cow manure product MCA analysis

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Table 5. Cow manure and sawdust(9:1) mixture product MCA analysis

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Table 6. Cow manure and sawdust(8:2) mixture product MCA analysis

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Table 7. Cow manure and fallen leaves(9:1) mixture product MCA analysis

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Table 8. Cow manure and fallen leaves(8:2) mixture product MCA analysis

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Table 9. HHV and ultimate analysis of torrefied products from cow manure

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Table 10. HHV and ultimate analysis of torrefied products from cow manure and sawdust mixture(9:1)

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Table 11. HHV and ultimate analysis of torrefied products from cow manure and fallen leaves mixture(9:1)

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Table 12. HHV and ultimate analysis of torrefied products from cow manure and sawdust mixture(8:2)

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Table 13. HHV and ultimate analysis of torrefied products from cow manure and fallen leaves mixture(8:2)

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