where does combustion take place in a furnace
Furnace Fuel flows into the burner and is burnt with air provided from an air blower. There can be more than one burner in a particular furnace which can be arranged in cells which heat a particular set of tubes. Burners can also be floor mounted, wall mounted or roof mounted depending on design. The flames heat up the tubes, which in turn heat the fluid inside in the first part of the furnace known as the radiant section or firebox. In this chamber where combustion takes place, the heat is transferred mainly by radiation to tubes around the fire in the chamber.
Burn Burns are caused by a variety of external sources classified as thermal (heat-related), chemical, electrical, and radiation.[20] In the United States, the most common causes of burns are: fire or flame (44%), scalds (33%), hot objects (9%), electricity (4%), and chemicals (3%).[21] Most (69%) burn injuries occur at home or at work (9%),[12] and most are accidental, with 2% due to assault by another, and 1â€“2% resulting from a suicide attempt.[17] These sources can cause inhalation injury to the airway and/or lungs, occurring in about 6%.[2]