For several problems occurred in selective non-catalytic reduction(SNCR)flue gas denitrification systems of thermal power plants equipped with circulating fluidized bed boiler

such as the complex nature of the work

poor control quality and economy of the conventional PID control

and can not be automatically controlled under variable working conditions

this article uses the generalized predictive control(GPC)method

which has better control effect to complex systems

to improve the control performance and regulation quality of the system.Through continuous research and adjustment on the GPC which is established on the basis of self-tuning control

the unit parameters are gradually optimized and the control quality reaches the optimum.The actual commissioning show that

the system can realize automatic control and achieve better regulation quality.