流動層ボイラ負荷運用とシミュレーション

抄録

A bubbling-type fluidized bed boiler uses the bed slumping and activation technique for controlling steam output. Because of this unique technique incorporated into the boiler design, the prediction and assessment of boiler performance are required during the initial boiler design stage for achieving a specified boiler operation mode. The intention of this paper is to provide subscribers with current knowledge regarding a computer simulation of boiler load control based on the present author's own experience in developing commercial size bubbling-type fluidized bed boilers. Brief review of the fundamental aspect of fluidized bed boilers is followed by the description of bed slumping and activation operation using a particle mixing model. A representative result of the computed fluidized bed temperature transient during load increase is presented for a large size bubbling fluidized bed boiler. Areas for further research are presented for both bubbling-type and circulating-type fluidized bed boilers.