Fully automatic intelligent system: This system is a fully automatic intelligent system that accurately measures the injection amount of reducing agent by measuring flue gas flow rate, temperature, NOx concentration, pressure, target denitrification rate, etc. When the urea level is low and the compressed air pressure is low, the injection will automatically stop. In the event of an unexpected power outage, compressed air shutdown, or compressed air shutdown, the spray gun will be automatically blown to prevent blockage. After returning to normal, it will continue to work. The system has a fault self diagnosis function, which can view its working status in real time.