Directing against the complex process in combustion

heat transfer

and flow

a decoupling control taking the coal quantity as the main to regulate the pressure in boiler drum and using the air quantity to control the bed temperature has been put forward

and the coordinated control strategy with prediction specialist control and with rapid correct circuit of variable amplitude and variable time being adopted.The application of said control on one CFB boiler of 135 MW unit shows that the main parameters of said unit

such as the actual load command of unit

the actual load of unit

the pressure before unit

the pressure command before unit

the pressure in boiler drum

the total fuel quantity

and the total air quantity etc.

all are more stable during the time of static and dynamic state.The problems of non-linearity

multi-variable

and time-varying behavior

and large retardation of objects with complex process having been better resolved.