Study on the Design of Attached Revolution Body Horizontal Rotary Kiln Dryer and the Optimum Operational Conditions

회전체를 부착한 수평형 로타리킬른 건조로의 설계 및 최적 운전조건 연구

  • Jung, Dong Hyun (Department of Environmental Engineering.BK21 Team for Hydrogen Production, Chosun University) ;
  • Chun, Young Nam (Department of Environmental Engineering.BK21 Team for Hydrogen Production, Chosun University)
  • 정동현 (조선대학교 환경공학부.BK21 수소생산 사업팀) ;
  • 전영남 (조선대학교 환경공학부.BK21 수소생산 사업팀)
  • Received : 2007.07.10
  • Accepted : 2007.10.16
  • Published : 2007.12.10

Abstract

Sludge disposal technology has been studied with many researchers since disposal of sewage sludge has been a social problem. The current technologies include incineration, carbonization, pyrolysis, landfilling and fertilization. However, all of these processes require a dry process, because sewage sludge with more than 80% high water content is difficult to be used as a raw material. This study has the purpose to establish the optimal operation conditions and the technology as changing the variables: kiln residence time, sludge load, dryer temperature, by using the previous study that is rotary kiln type dryer designed as a numerical simulation study. As the results, optimum conditions are determined as follows: kiln residence time, sludge load, dryer temperature are $62.5kg/m^3{\cdot}hr$, 26.2 min, $330^{\circ}C$, respectively. Content of water, drying efficiency, weight loss, volume loss show that the results are $10{\pm}2$, 88, 80, 60%, and the dried sludge is released by a dryer below 10 mm.

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