燃煤循环流化床模型与试验研究

Experimental Study and Simulation of a Coal fired Circulating Fluidized Bed

利用循环流化床内气 -固两相流动等基础方面的研究成果 ,根据本文床内气固浓 -淡流动模型 ,建立适用不同结构参数的循环流化床燃烧模型 ,考虑了床内气体、固体颗粒的返混、循环过程 ,以及煤燃烧、NO的生成和分解、颗粒磨损等因素。在循环流化床燃烧试验台上进行实验研究 ,模型仿真结果和实验数据吻合良好 ,表明气固两相浓

Based on the basic research results concerning the gas solid dual phase flow o f a circulating fluidized bed and an in bed gas solid bias flow model the autho r h as set up a circulating fluidized bed combustion model suited for different c ons truction parameters. The model has taken into account the return mixing and the circulation process of gas and solid particles in the bed. Also considered are s uch a variety of factors as coal burning, the generation and dissolution of nitr ogen oxides and particle wear action, etc. The results of the experimental study and model simulation on a circulating fluidized bed combustion test rig are in good agreement with the experimental data. This fully demonstrates that the circ ulating fluidized bed combustion system set up on the basis of the gas solid d e nse lean flow model can accurately simulate the combustion process of a circula ting fluidized bed.