非均等配风下的风水冷选择性冷渣器冷态排渣特性

以某电厂450t/h CFB锅炉的风水冷选择性冷渣器为原型，通过冷态模化实验研究了各仓室在均等和非均等配风下的排渣特性，分析了各仓室的风量比关系对排渣速率的影响规律。实验结果表明，冷渣器的实际流化风量下限值高于设计值，在送风机总风量基本不变甚至减小的情况下，通过调配各仓室的风量比关系可明显提高冷渣器的排渣速率。所得实验数据对冷渣器的安全运行具有一定的指导意义和参考价值。

Cold-state Slag Discharge Characteristics of an Air-water Cooled Selective Slag Cooler under a Non-uniform Air Distribution

With the air-water cooled selective slag cooler of a 450 t/h circulating fluidized bed boiler serving as a prototype and through a cold-state simulation test a study was conducted of the slag discharge characteristics in various chambers under a uniform and non-uniform air distribution. The impact of airflow ratios in various chambers on the slag discharge rate was analyzed. The results of the tests indicate that the lower limit of actual fluidized airflow of the slag cooler is higher than the design value. Under the condition of a basically unchanged total airflow rate of an air blower and even under a decreased airflow rate and through adjustment of airflow ratio in various chambers it is possible to significantly enhance the slag discharge speed of the slag cooler. The experimental data thus obtained can serve as a guide and reference for ensuring the safe operation of slag coolers.