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Study on Reduction Unburned Carbon Contents in Low Quality Fly Ash from Vietnam

베트남 저품위 비산재의 미연탄소 함량 저감 연구

  • Received : 2020.02.20
  • Accepted : 2020.04.01
  • Published : 2020.04.30

Abstract

According to Vietnam government establishes additional thermal power plant, processing the coal ash from power plant is urgent issue. This study targeted reducing unburned carbon contents in low quality fly ash to below 6% that according to international standards. As a result, the unburned carbon contents of low quality fly ash was high and irregular as 5.3~23.6%, and it was possible to reduce unburned cabon contents to under 6%, in case of unburned carbon contents below 9.8% ashes using air classification, in case of unburned carbon contents below 23.6% ashes using combined process composed of air classification and electrostatic separation.

베트남은 화력발전을 중심으로 한 발전용량 확보 계획을 추진 중이며, 석탄화력발전소로부터 배출되는 석탄재의 대량처리 방안 확보가 시급한 실정이다. 이 연구는 베트남에서 발생하는 석탄재 중 미연탄소 함량이 높아 재활용이 어려운 저품위 비산재의 미연탄소 함량을 국제 비산재 활용기준인 6% 미만으로 낮추는 것을 목표로 하였다. 저품위 비산재를 배출하는 발전소의 비산재 품질을 조사한 결과, 비산재의 미연탄소 함량은 5.3~23.6%로 미연탄소 함량이 높고 불규칙하였다. 공기분급과 정전선별을 적용하여 비산재를 처리한 결과, 미연탄소 함량 9.8%까지는 분급 단일공정으로, 23.6%까지의 비산재는 분급과 정전선별로 구성된 복합공정으로 미연탄소 함량을 6% 미만으로 감소시킬 수 있었다.

Keywords

References

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