Abstract:Aiming at the problems of higher operation cost, lower service life of denitrification catalyst and higher blocking risk of air preheater caused by excessive ammonia injection in SCR denitrification system, the solution of solving the existing problems of denitrification system by using big data analysis and modeling technology is put forward. The solution mainly includes the application of big data mining and big data modeling technology to the algorithm design of SCR system''s ammonia injection amount, catalyst life and its real-time activity, air preheater differential pressure and blocking risk rate. At the same time, the corresponding large data intelligent environmental protection platform is established, and the construction scheme, architecture and application effect of the platform are introduced. By comparing the economic benefits of SCR denitrification system before and after the application of the platform, it can be conclude that the application of the platform greatly reduces the operating cost of the system and improves the comprehensive economic benefits of enterprises. As a useful attempt in the field of SCR denitrification, the platform has achieved a new breakthrough in the field of Internet Plus Denitrification Industry, and pointed out a new direction for the development of thermal power denitration industry.