한국기계가공학회지 (Journal of the Korean Society of Manufacturing Process Engineers)

  • 제21권9호
  • /
  • Pages.35-41
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  • 2022
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  • 1598-6721(pISSN)
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  • 2288-0771(eISSN)
한국기계가공학회 (The Korean Society of Manufacturing Process Engineers)
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이젝터를 적용한 무기성 슬러지 건조시스템 기술개발

Development of Inorganic Sludge Drying System Technology Applied with Ejector by Air Velocity

  • 조은만 ((주) 리엔텍엔지니어링) ;
  • 정원훈 (경상국립대학교 일반대학원 자동차공학과) ;
  • 김동건 (경상국립대학교 자동차공학과) ;
  • 김봉환 (경상국립대학교 자동차공학과)
  • Cho, En-man (Reentec engineering Ltd.) ;
  • Jeong, Won-hoon (Department of Automotive Engineering, Graduate School of Gyeongsang National University) ;
  • Kim, Dong-keon (Department of Automotive Engineering, Gyeongsang National University) ;
  • Kim, Bong-hwan (Department of Automotive Engineering, Gyeongsang National University)
  • 투고 : 2022.06.13
  • 심사 : 2022.07.27
  • 발행 : 2022.09.30
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초록

The moisture content of many inorganic sludges is less than 70% during dewatering. Hence, a mono or piston pump cannot feed the sludge dryer. Thus, most inorganic sludge should be moved to a landfill or recycled directly without any reduction method. This development was invented to apply cyclone dryers using air and specially designed for the continuous injection of sludge sources by negative pressure and high air velocity for low moisture inorganic matter. Therefore, wastewater sludge and raw water treatment sludge discharged from various industrial fields might be settled by this development. The cyclone dryer was commercialized useful as moisture reduction equipment. This development was applied using a sludge injection system for sludge feeding and under the cooperation of ejector design computational fluid dynamics. Furthermore, this paper presented good ejector model results, blowing an airflow of 264 m3/min at an actual performance test.

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과제정보

본 연구는 환경산업기술원의 녹색혁신기업 연구개발사업(2020003170003)의 일환으로 수행되었음

참고문헌

  1. Mujumdar, B. S., Handbook of Industrial Drying, Dewatering and Drying of Wastewater Treatment Sludge, 3rd Edition, CRC Press, pp. 18, 2006.
  2. Kudra, T. and Mujumdar, A. S., Advanced Drying Technologies, 2nd Edition, CRC Press, pp. 49-67, 2009.
  3. Jamaleddine, T. J. and Ray, M. B., "The Drying of Sludge in a Cyclone Dryer Using Computational Fluid Dynamics," Journal Article in Drying Technology, Vol. 29, Issue 12, pp. 1365-1377, 2011. https://doi.org/10.1080/07373937.2011.567946
  4. Chuah, T. G., Gimbun, J. and Choong, T. S. Y., "A CFD Study of the Effect of Cone Dimensions on Sampling Aerocyclones Performance and Hydrodynamics," Powder Technology, Vol. 162, pp. 126-132, 2006. https://doi.org/10.1016/j.powtec.2005.12.010
  5. Joo, H. J., Jung, I. Y., Yun, S. K. and Kwak, H. Y., "CFD Analysis on the Flow Characteristics of Ejector According to the Position Changers of Driving Nozzle for F.W.G," Journal of the Korean Solar Energy Society, Vol. 31, No. 3, pp. 23-28, 2011. https://doi.org/10.7836/KSES.2011.31.3.023
  6. Ji, M. K., Kim, P. H., Park, K. T., Utomo, T., Chung, H. S. and Jeong, H. Y., "Performance Characteristics of Air Driven Ejector According to the Position Changes and the Shape of Driving Nozzle," Journal of the Korean Society of Marine Engineering, Vol. 32, No. 4, pp. 550-556, 2008.
  7. Utomo, T., Jin, Z., Rahman, H., Jeong, M. and Chung, H. S., "Investigation on Hydrodynamics and Mass Transfer Characteristics of a Gas-liquid Ejector using Three Dimensional CFD Modeling," Journal of Mechanical Science and Technology, Vol. 22, pp. 1821-1829, 2008. https://doi.org/10.1007/s12206-008-0614-3
  8. Kandakure, M. T., Gaikar, V. G. and Patwardhan, A. W., "Hydrodynamic Aspects of Ejectors," Chem. Eng. Science, Vol. 60, pp. 6391-6402, 2005. https://doi.org/10.1016/j.ces.2005.04.055
  9. Yadav, R. L. and Patwardhan, A. W., "Design Aspects of Ejectors: Effects of Suction Chamber Geometries," Chem. Eng. Science, Vol. 63, pp. 3886-3897, 2008. https://doi.org/10.1016/j.ces.2008.04.012