两钠装置尾气净化用SCR脱硝催化剂的开发及应用

本公司开发了一种低温高效且性能稳定的SCR脱硝催化剂。催化剂新鲜样品和毒化后再生样品在小试性能测试中NOx出口浓度小于50×10^-6，无明显性能衰减和结构变化，被硝盐污染后的样品可以通过水洗的方式得以完全再生。该催化剂经放大生产后，用于两钠装置尾气净化脱NOx，尾气净化后能达标排放。催化剂经一次水洗再生后运行至今，活性无明显衰减，亦未见催化剂阻力降明显增加。通过实验室小试性能评价与工业应用性能评价结果对比，以及模拟硝盐污染样品再生后性能评价结果对比，说明该催化剂适宜于工业化应用。

Development and Application of SCR De-NOX Catalyst for Purifying the Off-gas from Sodium Nitrite and Sodium Nitrate Plants

A kind of SCR De-NOx catalyst with high efficiency and stable performance at low temperature was developed by our company. The lab-scale experiment results of fresh sample and regenerated sample show that NOx outlet concentration was less than 50 x l0-6, no obvious activity decay or structure change was observed, and the sample polluted by nitrate could be regenerated by washing. The catalyst was used to remove NOX in the off-gas of sodium nitrite and sodium nitrate plants and the purified off-gas could meet the emission standard. No obvious activity decay or increasing resistance drop has been observed so far since the catalyst regenerated by washing once. The lab：scale experiment results, the industrial application results and the prop- erties of the regenerated sample which had been polluted by nitrate indicate the SCR De-NOX catalyst is suit- able for industrial application.