Change of Ammonia Consumption with Gas Turbine Output in DeNOx System for a 580 MW Combined Cycle Power Plant

580 MW급 복합발전소 탈질설비에서 가스터빈 출력에 따른 암모니아 소모량 변화

  • Published : 2019.10.30

Abstract

In this study, ammonia consumption by gas turbine output was adjusted to find out the amount of ammonia consumption that complies with the enhanced Air Quality Preservation Act and internal regulation emission standards in SCR type DeNOx System for a 580 MW Sejong Combined Cycle Power Plant. For measurements, the gas turbine output was varied to 50, 99, 149, 198 MW and ammonia consumption was adjusted with the combustion gas and ammonia supply conditions fixed at each stage. When the emission limit were change from 10 ppm to 8 ppm, ammonia consumption was increased from 78, 93, 105, 133 kg/h to 89, 113, 132, 176 kg/h. The increase rate of ammonia consumption was 14, 22, 26, 32% per output category compared to the 10 ppm emission limit, which was shown to increase as output increased.

본 연구에서는 580 MW급 세종복합발전소의 선택적 촉매환원방식 탈질설비 1호기를 대상으로 강화된 대기환경보전법 및 환경평가협의 질소산화물 허용배출기준을 준수하는 암모니아 소모량을 찾고자 가스터빈 출력별 암모니아 투입량을 조절하며 측정하였다. 측정을 위해 가스터빈 출력은 50, 99, 149 그리고 198 MW로 변동시키고 각 출력단계별 연소가스 및 암모니아 공급조건을 고정한 상태에서 탈질설비 내 암모니아 소모량을 조절하였다. 질소산화물 배출기준을 10 ppm에서 8 ppm으로 변경하였을 때 출력대별 암모니아 소모량은 각각 78, 93, 105 그리고 133 kg/h에서 89, 113, 132 그리고 176 kg/h로 증가 되었다. 암모니아 소모량 증가율은 질소산화물 배출기준 10 ppm 대비 출력대 별 각각 14, 22, 26 그리고 32%로 출력이 증가할 수 록 증가율도 늘어남을 알 수 있었다.

Keywords

References

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