循环流化床锅炉炉内传热研究

A study of Circulating Fluidized Bed Heat Transfer

在以往对循环流化床锅炉炉内传热理论研究的基础上,发展了一种循环流化床锅炉炉内传热计算模型,对颗粒团覆盖壁面的时均份额、颗粒分散相辐射传热系数进行了合理的修正。此外,在以往的模型中没有考虑核心区辐射换热的影响,对此给予了补充。进而提出了更为完整的炉内传热模型。利用该模型,以一台300 MW循环流化床锅炉实例为基础进行了锅炉传热计算,探讨了空隙率和颗粒直径对炉膛传热系数的影响。

This dissertation aims to develop a heat transfer coefficient calculation of circulating fluidized bed （CFB） on up-to-date theories of previous research work. The share of particle cluster covering on the walls and the radiative heat transfer coefficient of the dispersed phase are corrected reasonably. The previous model did not consider the radiation heat transfer of the core area and this paper adds. Therefore, the total heat transfer model is established. Choose an example of 300MW circulating fluidized bed unit to discuss boiler inner heat transfer character.