Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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A Technical Review on the Protective Measures of High Temperature Corrosion of Boiler Heat Exchangers with Additives

첨가제를 이용한 보일러 열교환기의 고온부식 방지기술 현황

  • Kim, Beomjong (School of mechanical Engineering, Sungkyunkwan University) ;
  • Ryu, Changkook (School of mechanical Engineering, Sungkyunkwan University) ;
  • Lee, Uendo (Thermochemical Energy System R&BD Group, Korea Institute of Industrial Technology) ;
  • Kim, Youngdoo (Thermochemical Energy System R&BD Group, Korea Institute of Industrial Technology) ;
  • Lee, Jeongwoo (Hansol SeenTec) ;
  • Song, Jaehun (Hansol SeenTec)
  • Received : 2017.03.27
  • Accepted : 2017.05.17
  • Published : 2017.09.30
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Abstract

As the use of waste and biomass increases in a power generation boiler, high temperature corrosion (HTC) problems of boiler heat exchangers are becoming very important. Chlorine of the low-rank fuels is mainly responsible for the HTC issues, which typically occur in the surface of high temperature heat exchanger like a superheater or reheater. In order to mitigate the problem, various approaches have been proposed in terms of design modification, material improvement, fuel pre-treatment and additive utilization. In this study, the current state of research and development focused on the additive method was investigated.

기후변화 대응을 위한 청정 화력발전 기술의 일환으로 폐기물과 바이오매스를 중심으로 한 신재생연료의 이용이 크게 증가함에 따라 특히 고온 고압 스팀 생산이 필요한 발전용 보일러 열교환기의 고온부식(High temperature corrosion) 문제가 심각한 현안으로 대두되고 있다. 이러한 문제점은 저급연료에 포함된 염화알칼리 성분이 보일러 내 열교환기 중 표면온도가 가장 높은 과열기(Superheater) 또는 재열기(Reheater)에 점착된 후 염소에 의해 부식이 가속화되어 일어난다. 이를 해결하기 위해 설계 변경, 재료 개선, 연료 전처리 등의 고온부식 회피 방법과 함께 첨가제를 이용한 고온부식 방지 기술이 활용되고 있다. 본 연구에서는 보일러에서 고온부식 방지를 위한 다양한 접근 중 특히 첨가제를 이용한 연구개발 현황을 소개한다.

Keywords

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