两种新型流化床——高密度循环流化床和循环湍动流化床的对比分析

Comparative study of two novel fluidized beds—HDCFB and CTFB

高密度循环流化床(HDCFB)和循环湍动流化床(CTFB)相比于传统循环流化床具有很多优点。从实验装置、原理、流动结构及其与不同流型之间的对比介绍了HDCFB和CTFB,得出以下结论:HDCFB和CTFB固体循环量大,固含率高,传热传质及气固接触效率高,固体返混少,具有较为均一的宏观流动结构。两者都可以满足现代工业高产率、高质量的发展需求。通过理论分析,CTFB相较于HDCFB具有更多优势,工业应用前景更好。

High-density circulating fluidized bed （HDCFB） and circulating turbulent fluidized bed （CTFB） have many advantages comparing to the conventional circulating fluidized bed. This paper introduces HDCFB and CTFB from such aspects, as experimental facilities, operating principles, flow structures and comparisons with other flow regimes. In HDCFB and CTFB, one could obtain high solids concentration, high heat and mass transfer efficiency, high gas and solids contacting efficiency, less solids backrnixing, and more uniform flow structure. As such, high production efficiency and better product quality can be achieved, which is very important for industrial applications. Comparing HDCFB and CTFB, CTFB has more advantages and better industrial applications.