Analysis of the clinker formed in circulating fluidized bed boiler

유동층 보일러에 생성된 크링커에 대한 분석

  • 김경숙 (한전 전력연구원 발전연구실 수화확분석그룹) ;
  • 박현주 (한전 전력연구원 발전연구실 수화확분석그룹) ;
  • 이태원 (한전 전력연구원 발전연구실 수화확분석그룹) ;
  • 정년호 (한전 전력연구원 발전연구실 수화확분석그룹)
  • Received : 1999.07.16
  • Published : 2000.02.25

Abstract

During the commissioning period in Tonghae thermal power plant which is the largest circulating fluidized bed boiler in the nation, a considerable amount of clinker was formed at FBAC and seal pot. Various attempts, for example, concentration analysis, surface phenomena, thermal characterization, and crystal structure of ash, bed sand, limestone, clinker, and mixture of each gradients have been studied to identify the causes of clinker formed in circulating fluidized bed boiler. As the results, the characterization of black particles in which separated from the clinker is more similar to that of bed sand, on the other hand, white particles are more similar to ash. In addition, the sintering temperature of sand is over $1,200^{\circ}C$ and this temperature was decreased as limestone is added to bed material. The cause of clinker was proved that ash was sticked to molten or sintered sand or limestone in the area of high temperature in the circulating system.

Keywords

clinker;circulating fluidized bed boiler;FBAC(fluidized bed ash cooler);sintering;mullite

References

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