落砂法检测平板式烟气脱硝催化剂耐磨特性的研究及应用

Research and Application of Abrasion Resistance for Plate-Type SCR Catalyst by Falling Abrasive Method

平板式脱硝催化剂的耐磨特性是评价其机械性能的一项关键指标。为实现对该性能的准确测定,设计开发了一种落砂试验方法及装置,利用一定质量磨料自由落体产生的冲击力,对催化剂样品表面产生冲刷作用,并造成质量损失,由此实现对于样品的耐磨特性的评价。经研究论证,优选试验参数采用粒径为0.300~0.425mm的S30408不锈钢砂为磨料,设置磨料的下落高度为2.0 m,磨料的添加速率为0.4kg/min,磨料消耗量为4.0kg,能够获得显著且稳定的检测结果。经与传统旋转橡胶砂轮试验方法进行比对,验证了所开发的落砂试验方法的合理性和可行性,且能够更加有效地区分不同品质催化剂在耐磨特性上的差异。

Abrasion resistance is the key mechanical property of plate-type SCR catalyst.For the accurate measurements of the properties,a falling abrasive method and device was designed and developed in this study.Principle of this method could be briefly described as follows.A fixed mass of abrasive fall freely from specific height,having impact on the surface of plate-type SCR catalyst sample.In this process,the mass loss of samples caused by the impact can be used to evaluate the of abrasion resistance of plate-type SCR catalysts.The result of research showed that,a significant and stable test results could be obtained with the follow optimized experimental parameters:S30408 stainless steel grit with 0.300mm to 0.425 mm particle size range was selected as the abrasive;The abrasive falling height was 2.0 m;The abrasive supply rate was 0.4 kg/min;And the total abrasive consumption of single test was 4.0 kg.Comparison between falling abrasive method and traditional test method of rotating abrasive rubber wheel showed that,the falling abrasive method was reasonable and feasible,which could distinguish the abrasion resistance differences from various plate-type SCR catalysts with more efficiency.