Directing against the problems existing in the control system of CFB boiler for 330 MW unit equipped in Jinghai Gangue Power Generation Co Ltd

such as bad adaptability to coal quality variation

frequent actuation of the furnace pressure protection

and non-accurate set value of secondary air flow rate

etc.

the coefficient of feed forward magnitude has been corrected.Through links of inertance

the optimization measures in load-increasing and load-reducing

i.e.increasing the air flow rate at first

and then increasing the coal feed rate;and reducing the coal feed rate at first

and then reducing the air flow rate

have been realized.Test in load change of the unit shows that the regulating performance and quality of said control system after optimization all suatisfy the requirements of control

the main indices of unit are in a sitable range

having good effectiveness.