| 摘要 |
PURPOSE:To completely burn combustion component contained in exhaust gas and to facilitate low load operation and quick starting, by installing a non-heat exchanging layer part wherein it is possible to burn a fire retardant material. CONSTITUTION:A non-heat exchanging layer part 2 having no heat transfer pipe has volume measuring width W X height H X length S, the volume is calculated on a basis of the heating value and the disposing amount of a material to be burnt, and temperature in the layer is determined depending on the properties of a material to be disposed. Combustion gas of the material to be disposed fed out from a fluidized layer is needed to be sufficiently burnt in an empty part, and thereby a ratio of the area of an exposing pipe wall surface at a part 1b, where a pipe metal surface is in contact with combustion gas, to the area of a refractory material-covered wall surface whereon refractory materials 1a are installed is set based on temperature in the layer serving as a factor so that gas temperature in the empty part increases. This causes combustion gas from a starting cell to uniformly flow in a tower top void part 49, and enables uniforming of heat absorption and forecasting of combustion condition, resulting in facilitation of combustion control of the furnace. Further, reduction in capacity of the starting cell 2 permits also a decrease in a combustion load. |
