한국폐기물자원순환학회지 제35권 제6호 (p.507-514)

|Special Original Paper|
저온 열원 활용 디스크 건조기를 이용한 하수슬러지 수열탄화물 건조 효율 평가

A Evaluation on Drying Performances of Hydrothermal Carbonization of Sewage Sludge by using Low-grade Heat Source
키워드 :
Recovery of waste heat,Hydrothermal carbonization,Indirect disk dryer,Drying rate,Waste-to-energy

목차

Abstract
I. 서 론
II. 실험방법
  1. 간접디스크 건조
  2. 수열탄화물 성상분석
  3. 건조실험
III. 실험결과
  1. 건조속도
  2. 건조곡선
  3. 간접 디스크 건조기를 이용한 건조실험
  4. 건조기 설계인자
IV. 결 론
References

초록

The treatment of sewage sludge using hydrothermal carbonization (HTC) can be an attractive alternative to conventional sludge disposal, but it should be accompanied by a drying process that uses Refuse-derived Fuel (RDF). However, the largest proportion of the energy demand in sludge-drying techniques is for heat sources, which has led to increased operation and maintenance costs. Recovering residual heat to apply to sludge drying significantly reduces both the operating cost and the greenhouse gas emissions. Suitable integration can be realized between drying technology and waste-to-energy (WtE) plants through the recovery of waste heat in WtE conversion as a heat source for sludge drying. This present paper investigates the indirect disk drying performance of the hydrothermal carbonization of sewage sludge using a low-temperature heat source in a laboratory and proposes an integration process with the drying technology of hydrothermal carbonization using waste heat. This paper concludes with experimental results that indirect disk drying technology can be applied in waste-heat recovery systems.