What is primary air and secondary air?
People also ask, what is primary and secondary air in boiler?
Primary air provides a percentage of the combustion air, but more importantly, controls the amount of fuel that can be burned. Secondary air improves combustion efficiency by promoting the fuel to burn completely. Power burners generally do not require secondary air.
Also, what are the symptoms of a shortage of primary air? A small hard blue flame or a flame blowing off the burner ports or lighting back at the burner orifice indicates too much primary air and the air shutter should be closed. A soft, blurred or yellow tipped flame indicates lack of primary air and the air shutter should be opened.
Just so, what is secondary air in a furnace?
secondary air. 1. Air which is introduced into a furnace (in addition to the primary air which enters either as a mixture with fuel or as blast underneath a stoker) above or around the flames to promote combustion.
What is excess air?
Excess air ensures that there is enough air for complete combustion. Excess air is expressed as a percentage of theoretical air required. Thus, 10% excess air indicates that 110% total air is being supplied. In boiler operation, excess air represents a heat loss.