Journal of the Korean Society of Marine Environment & Safety (해양환경안전학회지)

The Korean Society of Marine Environment and safety (해양환경안전학회)
권호 표지
DOI QR코드

DOI QR Code

FMEA of Electrostatic Precipitator for Preventive Maintenance

전기집진기 예지보전 단계에서의 고장모드영향분석

  • Han, Seung-Hun (Department of Mechanical System Engineering, Gyeongsang National University) ;
  • Lee, Jeong-Uk (Department of Mechanical System Engineering, Gyeongsang National University) ;
  • Lee, Sun-Youp (Korea Institute of Machinery and Materials) ;
  • Hwang, Jong-Deok (Woomin Technology Co.Ltd) ;
  • Kang, Dae-Kon (Department of Safety Engineering, Chungbuk National University)
  • 한승훈 (경상대학교 기계시스템공학과) ;
  • 이정욱 (경상대학교 기계시스템공학과 대학원) ;
  • 이선엽 (한국기계연구원) ;
  • 황종덕 ((주)우민기술) ;
  • 강대곤 (충북대학교 안전공학과)
  • Received : 2020.07.06
  • Accepted : 2020.10.28
  • Published : 2020.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

Currently, 90 % of the world's population breathes air with a fine dust content exceeding the World Health Organization's annual average exposure limit (10 ㎍/㎥). Global efforts have been devoted toward reducing secondary pollutants and ultra-fine dust through regulations on nitrogen oxides released over land and sea. Domestic efforts have also aimed at creating clean marine environments by reducing sulfur emissions, which are the primary cause of dust accumulation in ships, through developing and distributing environment-friendly ships. Among the technologies for reducing harmful emissions from diesel engines, electrostatic precipitator offer several advantages such as a low pressure loss, high dust collection efficiency, and NOx removal and maintenance. This study aims to increase the durability of a ship by improving equipment quality through failure mode effects analysis for the preventive maintenance of an electrostatic precipitator that was developed for reducing fine dust particles emitted from the 2,427 kW marine diesel engines in ships with a gross tonnage of 999 tons. With regard to risk priority, failure mode 241 (poor dust capture efficiency) was the highest, with an RPN of 180. It was necessary to determine the high-risk failure mode in the collecting electrode and manage it intensively. This was caused by clearance defects, owing to vibrations and consequent pin loosening. Given that pin loosening is mainly caused by vibrations generated in the hull or equipment, it is necessary to manage the position of pin loosening.

전 세계 90 %의 인구가 WHO의 연평균 미세먼지 노출 기준(10 ㎍/㎥)을 초과한 공기를 흡입하고 있다. 전 세계적으로 육상뿐만 아니라 해양에서 발생하는 질소산화물에 대한 규제를 통해 2차 오염물질, 초미세먼지 저감에 대해 노력하고 있으며 국내에서는 선박에서 미세먼지 발생의 주요한 원인인 황 함유량 저감과 환경친화적 선박의 개발 및 보급 등을 통해 깨끗한 해양환경 조성을 위한 노력을 하고 있다. 디젤엔진 유해 배출가스 저감을 위한 기술 중 압력 손실이 적고 높은 집진 효율 및 NOx의 제거와 유지 관리의 장점이 많은 전기 집진기의 수요와 중요성이 증가하고 있다. 본 연구는 총톤수 999톤급 선박의 2,427 kW 선박용 디젤엔진의 미세먼지 저감을 목적으로 개발된 전기 집진기를 예지보전단계에서 고장모드영향분석을 통해 장비 품질을 높여 선박 내에서의 내구연한을 높이고자 위험 우선순위 도출하였다. 위험 우선순위는 고장모드 241(poor dust capture efficiency)이 RPN 180으로 가장 높았다. Collecting electrode에서 가장 많은 고위험 고장모드를 검출하여 집중관리 부품으로 관리해야 할 필요가 있었으며 원인으로 진동과 핀 풀림으로 인한 유격 불량이 가장 많이 검출되었다. 핀 풀림 역시 근본적으로는 선체 또는 장비에서 발생하는 진동이 원인이 되어 발생할 수 있는 사항이기 때문에 핀 풀림이 발생하는 개소에 보완이 필요하겠다.

Keywords

References

  1. Bertsche, B.(2008), Reliability in Automotive and Mechanical Engineering, Springer-Verlag Berlin Heidelberg.
  2. FEMA(1997), Multi Hazard Identification and Risk Assessment: A Cornerstone of the National Mitigation Strategy, United States. Federal Emergency Management Agency.
  3. IEC-60812(2001), Analysis Techniques for System Reliability Procedure for Failure Mode and Effects Analysis (FMEA), IEC.
  4. IMCA(2002), The International Marine Contractors Association, Guidance on Failure Modes & EffectsAnalyses (FMEAs), IMCA M 166.
  5. IQAir(2020), 2019 World Air Quality Report Resion & City PM2.5 Ranking, pp. 5-13.
  6. Jumbad, V. and J. J. Salunke(2016), FMEA Methodology for Quality Improvement in Sheet Metal Industry, IJERT., Vol. 5(1), pp. 122-126.
  7. Kang, D. K., S. H. Kim, and J. H. Park(2018), A Study on the Improvement of Passenger Ship Rudder Stock and Tiller Locking Nut Loosening by Analyzing an Investigation Report and the NAS 3350 Test, Journal of the Korean Society of Marine Environment & Safety, Vol. 24(2), pp. 253-259. https://doi.org/10.7837/kosomes.2018.24.2.253
  8. Kim, D. U., S. H. Jung, S. H. Shim, J. T. Kim, and S. S. Lee(2019), Flow Distribution in an Electrostatic Precipitator with a Perforated Plate, Clean Tach., Vol. 25(2), pp. 147-152.
  9. Kosha(2012), Giude of FMEA, Kosha Guide, X-6-2012.
  10. Lee, E. K., S. H. Choi, and M. H. Kang(2017), Rapid Installation of AMPs to Reduce Particulate Matter in Port Cities, Weekly Report of Korea Maritime Institute, Vol. 35, pp. 1-23.
  11. Lee, J. O., I. C. Yeo, and Y. S. Yang(2001), A Trial Application of FSA Methodology to the Hatchway Watertight Integrity of Bulk Carriers, Marine Structures, Vol. 14, pp. 651-667. https://doi.org/10.1016/S0951-8339(01)00007-7
  12. Lee, S. H., B. Y. Kang, B. H. Jeong, and J. Y. Gu(2020), National Management Measures for Reducing Air Pollutant Emissions from Vessels Focusing on KCG Services, Vol. 26(2), pp. 163-174. https://doi.org/10.7837/kosomes.2020.26.2.163
  13. Lim, H. C. and D. C. Lee(1998), Influence of the Distribution of Wind Velocity and Mist Concentration for the Improvement of Efficiency with an Electrostatic Precipitator, Journal of KIIS, Vol. 13(4), pp. 155-161.
  14. Ministry of Oceans and Fisheries(2020a), Enforcement Decree of Marine Environment Management, Presidential Decree No. 30977.
  15. Ministry of Oceans and Fisheries(2020b), Promotion and Development of Environment Friendly Vessels Act, Act No. 16167.
  16. MOE(2020), Ministry of Environment, Special Act on the Reduction and Management of Fine Dust, Act No.17177.
  17. NPAC(2017), National Planning Advisory Committee, Moon Jae-in Goverment 5-year plan for state administration No.58
  18. Son, B. H. and J. U. Bae(2007), A Study on the Performances of Exhaust Gas Purification at Process on the Development of Corona Discharge Type Electrostatic Precipitatior for Diesel Engines, Journal of the Korean Society of Marine Engineering, Vol. 31(8), pp. 904-910. https://doi.org/10.5916/jkosme.2007.31.8.904
  19. White, H. J.(1956), Chemical and Physical Particle Conductivity Factors in Electrostatic Precipitation, Chemical Engineering Progress, Vol. 52(6), pp. 244-248.
  20. Won, J. M. and S. C. Hong(2019), Selective Catalytic Reduction Technology Trend for the Removal of Nitrogen Oxide from Ship Flue Gas, KIC News, Vol. 22(5), pp. 25-40.

Cited by

  1. Design of Particulate Matter Reduction of the Electrostatic Precipitator with Low Pressure for 300 kW Class of Marine Diesel vol.25, pp.1, 2020, https://doi.org/10.9726/kspse.2021.25.1.060
  2. Prediction of Dust Collection Efficiency According to the Shape of Electrode and Collecting Plate for Electrostatic Precipitators Using Gas Flow Analysis vol.33, pp.4, 2021, https://doi.org/10.13000/jfmse.2021.8.33.4.962