循环流化床内部构件磨损的模拟实验研究

Experimental Study on the Surface Abrasion of the Internals in CFB

利用自行开发的电阻模拟法 ,对循环流化床圆柱形内构件表面受气固两相流磨损的情况进行实验研究。实验结果揭示了气体流速和固体颗粒循环速率两个操作条件对磨损速率的影响规律。并以边界层的发展和分离解释了内部构件表面磨损的不均匀性现象。实验方法有助于开发内部构件磨损的在线检测技术。

An experiment using electric resistance analogic method was carried out to study the surface abrasion of the internals in circulating fluidized beds (CFB). By considering the effects of gas velocity and particle circulating rate on the surface abrasion rate, an empirical equation is proposed. The non uniform abrasion observed on the surface is explained with the boundary layer development and its separation around the solid boundary. The method described in the paper may be used to develop an on line testing system for the surface abrasion of CFB internals.