Multi-variable interval constrained estimation-based SCR denitration optimized control system and method

The invention discloses a multi-variable interval constrained estimation-based SCR denitration optimized control system, which comprises an NOx concentration target value setting unit, a multi-variable predictive control unit, a proportional control unit A, an ammonia spraying valve A, an SCR reactor A, a transition flue between the reactor A to a chimney inlet, a proportional control unit B, an ammonia spraying valve B, an SCR reactor B, a flue between the reactor B and the chimney inlet, and the chimney inlet. The invention also discloses a control method of the above system. According to the technical scheme of the invention, the response speed of the ammonia spraying amount control to the unit load change is increased. Meanwhile, the influence on the performances of the system, caused by the saturation of an actuator, can be avoided. The actuating number of the actuator is reduced, and the service life thereof is prolonged. The economical efficiency of the denitration system is improved. 本发明公开了种基于多变量区间约束预