During start-up and shutdown of coal pulverizer in normal operation of boilers in Shajiao B Power Plant

injection of fuel oil should be carried out for stabilization of combustion

resulting in large consumption of fuel oil in said power plant.Results of test show that the temperature in furnace is higher than the temperature required for stabilizing ignition of pulverized coal and air flow at a distance of 1.0 m far from outlet of burners

and the pressure produced from knocking combustion of burners hasn't large influence upon negative pressure in the furnace under present operation mode of boilers.Hence

the start-up and shutdown of coal pulverizer without injecting fuel oil can be safely realized.Only due to this

300 t of fuel oil can be saved for one boiler in one year.