高尘烟气脱硝催化剂耐磨性能研究

STUDY ON ABRASIEVENESS OF CATALYST USED FOR DENITRIFICATION IN FLUE GAS WITH HIGH DUST CONTENT

分析指出高尘烟气条件下造成脱硝催化剂磨损的主要因素是烟气流速、飞灰硬度以及催化剂表面材料抗屈服强度等,磨损在催化剂顶部和内部通道均有发生。对此,提出了催化剂顶端加固,提高表面材料的抗屈服强度,增加催化剂壁厚以及选择合适的催化剂类型等措施。经过比较得出,平板式催化剂在高尘烟气条件下的耐磨性最强。

Through analysis,the affecting factors on catalyst used for denitrification in flue gas with high dust content have been pointed out,they are mainly flow velocity of flue gas,hardness of fly ash,and yield strength of surface material on the catalyst etc.,confirming abrasion are occurred on the top and in the inner passage of catalyst.For this,some measures for preventing catalyst from abrasion,such as reinforcing the top of catalyst,heightening the yield strength of surface material,increasing the thickness of catalyst＇s wall,as well as selecting suitable sort of the catalyst etc..Through comparison,it is believed that the abrasiveness of plate type catalyst is the strongest in flue gas with high dust content.