Research on SCR Flue Gas Denitration of Unit on Variable Fuzzy Controller

The denitrification rate of SCR flue gas denitrification system is controlled by the amount of ammonia, and the amount of ammonia spray controlled by ammonia flow control system. Therefore, optimizing the flow control system effectively improve the rate of denitrification. A fuzzy controller based on variable universe is designed to realize the optimal control of the amount of ammonia injection, and used Matlab simulation software to simulating, analysised and compared with the results of the traditional control scheme. The results show that, compared with the traditional PID control, the fuzzy control spray ammonia flow system based on the variable universe has smaller overshoot and stronger robustness, which can effectively improve the control quality of the control system.