Boiler air preheater in power plant is a kind of equipment which uses the heat of flue gas in the boiler tail flue to heat the boiler air

so as to reduce the loss of exhaust gas

increase the temperature of inlet air and improve the efficiency of boiler

if the air preheater of the boiler is blocked

it will seriously affect the full load operation of the boiler

so it is very important to take effective preventive measures to avoid the air preheater blocking. Through the discussion on the cause of the blockage of the boiler air preheater in the power plant

the main causes of the blockage were found to be low steam injection pressure

low fan inlet temperature

high exhaust gas temperature

low metal surface temperature of the preheater and coal quality

after taking effective measures such as strengthening the management of raw coal

preventing the abnormal air preheater and setting the air preheater to blow ash correctly

the blockage of the air preheater was effectively controlled.