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Control of SCR System for NOx Reduction in a Refuse Incineration Plant Using Repetitive Control Method

반복제어법을 이용한 소각장 NOx 저감용 SCR 시스템의 제어

  • 김인규 (부경대학교 대학원) ;
  • 여태경 (부경대학교 대학원) ;
  • 김환성 (한국해양대학교 물류시스템공학과) ;
  • 김상봉 (부경대학교 기계·자동차공학부)
  • Published : 2000.11.01

Abstract

The refuse incineration plant has an important role in saving the combustion energy for local heating system. But harmful combustion gas(NOx etc.) leads to some serious environmental problem. To reduce the gas, a SCR(Selective Catalytic Reduction)system is installed and it is controlled by adjusting the flow of ammonia gas(NH3) . In this paper, we apply a repetitive control method to reduce NOx by adjusting the flow of ammonia gas for SCR system in a refuse incineration plant which is located in Haeundae, Pusan, Firstly, we analyze the inlet NOx period by FFt method, and verify its periodic variations. Secondly, we design a repetitive control system by using state space model method. Lastly, the effectiveness of repetitive control system is shown by comparing to a conventional PID control in simulation and experimental results.

Keywords

SCR(Selective Catalytic Reduction, 촉매환원법);Repetitive Control(반복제어);PID Control(PID 제어);Refuse Incineration Plant(소각장);NOx(질소산화물);NH3(암모니아);NH3 slip(암모니아 슬립량)

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