蜂窝式脱硝催化剂在烟气中磨损行为的模拟研究

Research on Abrasion Simulation of DeNOx Honeycomb Catalysts in Flue Gas

利用耐磨损性能模拟试验装置,在不同条件下对用于选择性催化还原法(SCR)脱硝的多种规格的蜂窝式脱硝催化剂进行了耐磨损性能的试验研究。结果表明,壁面磨损是导致蜂窝式催化剂耐磨损性能下降的主要原因,其磨损行为符合"马格努斯"效应的理论;采用多层布置的催化剂中,下层催化剂的磨损要比上层相对严重;在高浓度飞灰工况中,要科学慎重地进行催化剂选型,当飞灰质量浓度超过30 g/m3时,建议选用标准型、壁厚大于1.0 mm的催化剂。

The abrasion performance tests for different types of honeycomb DeNOx catalysts used for SCR denitrification under different conditions are carried out with a simulation testing device.The tests show that the inner wall abrasion of the catalysts is the main reason for the reduction of abrasion resistance,which coincides with'Magnus Effect' theory.The result also indicates that the abrasion degree of lower-layer catalysts is more serious than that of upper-layer catalysts when multi-layer catalyst arrangement is adopted.In high fly ash operating conditions,the type selection of catalyst should be made scientifically and discreetly.When the dust concentration exceeds 30 g/m3,the standard type of the catalyst with the thickness of more than 1.0 mm is recommended.