Through calculation of temperature rise before ignition of pulverized coal with airflow

the feasibility of without injecting fuel oil or injecting little fuel oil during startup or shutdown of the coal pulverizer has been discussed on the theory of Semonov’s hot ignition. Results of theoritical calculation show that the method of injecting little fuel oil during startup of the coal pulverizer for direct wallfiring boilers is feasible

and at the least a half of ignition oil guns needn’t to put into service

only from this ignition mode the fuel oil consumption of startup burners can be reduced 50%. Under certain conditions

the fuel oil can’t be injected

thereby

it is expected to save the total fuel oil used for ignition.