废旧脱硝催化剂再生工艺及工程案例

Regeneration Process and Engineering Case of Waste Denitrification Catalyst

脱硝催化剂在火电厂SCR脱硝技术中占据重要比重,不仅加装的费用占总投资的近40%,且催化剂性能的好坏直接影响脱硝的效率。本文系统综述了催化剂中毒失活的物理及化学机制、再生方法及工艺,并结合大唐南京环保科技有限责任公司SCR脱硝催化剂再生项目,详细介绍了再生工艺流程在实际工程的应用,经测试,再生后的催化剂各项性能(如元素含量、比表面积、活性K值、SO2/SO3转化率等)均得到明显恢复,且达到了火电厂使用要求,该项目的成功应用对于脱硝催化剂使用寿命的延长及再生工艺的制定具有重要的指导意义。

Denitrification catalyst occupies an important proportion in SCR denitrification technology of thermal power plant. Not only does the cost of installation account for nearly40% of the total investment,but also the performance of catalyst directly affects the efficiency of denitrification. In this paper,the physical and chemical mechanism of catalyst poisoning and deactivation,regeneration methods and processes are systematically reviewed. Combining with SCR denitrification catalyst regeneration project of Datang Nanjing Environmental Protection Technology Co.,Ltd.,the application of regeneration process in practical engineering is introduced in detail. After testing,the properties of regenerated catalyst (such as element content,specific surface area,active K value,SO2/SO3 conversion rate) are tested. The successful application of this project has important guiding significance for the extension of the service life of denitrification catalyst and the formulation of regeneration process.