A theoretical study on circulating fluidized beds in actual operation is described and a heat transfer model for fluidized beds circulating under high temperature is derived.
本文阐述了对实际运行的循环流化床的理论研究，推导出高温状态下循环流化床的传热模型。
In circulating fluidized beds, but with existing problems of high ignition temperature, large content of carbon in the fly ash and relatively low efficiency of combustion.
试验结果发现循环流化床能够有效燃烧无烟煤，但存在着火温度高，飞灰含碳量大，燃烧效率较低等问题。
Therefore, in addition to large hot water system or need high water temperature of the situation, the only choice of circulating, most commonly with mandatory nature of circulating water heater.
因此，除大型热水系统或需要较高水温的情形，才选择强制循环式，一般大多用自然循环式热水器。
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