Based on analysis of characters of boiler equipped for 300 MW unit in Datang Honghe Power Generation Co Ltd

the control system of primary air

the operation mode

and the distribution of secondary air

and the high-pressure fuidized air system have been optimized.After optimization

the regulation quality of primary air control system and the service life of boiler have been enhanced

the combustion in furnace being improved

the times of overtemperature for superheated and reheated steam

as well as the times of non-scheduled unit shutdown being greatly reduced

the consumption rate of service power being decreased

satisfying the requirement of power grid for load-reducing rate of unit.