Air-Jet Furnace definition of Air-Jet Furnace in the Free Online Encyclopedia.

Furnace, Air-Jet

a firebox consisting of steam or hot-water boilers or furnaces, in which the fuel (coal dust, atomized mazut, or a gas) burns in a spray that occupies a large portion of the furnace chamber, in contrast to a laminar combustion firebox. Depending on the arrangement of the burners, the fuel sprays may be straight (with the burners at the bottom or top), bent at an angle of 90° (with horizontal arrangement of the burners), or bent 180° (U-shaped fuel sprays). The temperature of the fuel spray in the center of combustion reaches 2000°C and gradually decreases to approximately 1000°C at the furnace exit.

Air-jet furnaces are characterized by intense thermal radiation of the flame at the furnace walls. The walls are usually covered by a lattice of water-cooled pipes or, in large, modern steam boilers, of finned tubes welded together. The heavy exterior of firebrick used in old boilers has been replaced by lightweight insulation suspended from the outside onto the finned tubes. A large percentage of current fireboxes are air-jet furnaces.

Mentioned in	?		Encyclopedia browser	?		Full browser	?
No references found			air-dried strength air-dry moisture content air-earth conduction current air-earth current air-entrained cement air-entrained concrete air-entraining admixture air-entraining agent air-entraining hydraulic cement air-exhaust ventilator Air-Fuel Mixture air-fuel ratio air-ground communication air-handling luminaire air-handling system air-handling unit Air-Hardening air-hardening steel air-heating system air-inflated structure Air-Injection Engine air-injection reactor air-injection system air-inlet valve air-insulated substation Air-Jet Furnace air-jet process air-knife coating air-lance air-launched ballistic missile air-lift hammer air-lift pump air-light troffer air-line lubricator air-line main air-lock strip air-mass analysis air-mass climatology Air-Mass Modification air-mass precipitation air-mass shower air-mass source region air-measuring station air-mixing plenum air-permeability test air-plot wind velocity air-pollution control Air-Pollution Measures air-position indicator air-pressure drop air-raid shelter			Air-Ground Operations School Air-Ground Operations System Air-ground Radiotelephone Automated Service air-handling luminaire air-handling system air-handling unit air-handling unit Air-Hardening air-hardening steel Air-Heating & Cooling Coils air-heating system Air-Height Surveillance Radar Air-Ice Chemical Interaction Air-independent propulsion Air-India Limited air-inflated structure Air-Injection Engine air-injection reactor air-injection system air-inlet valve Air-Installation Compatible Use Zone air-insulated substation Air-Insulated Switchgear air-intake Air-Isolated Monolithic Air-Jet Furnace air-jet process air-kiss air-knife coating air-lance Air-land battle Air-Land Battle Advanced Technologies Air-Land Battle Assessment Model Air-Land Battle Operations Air-Land Concepts and Doctrine Office Air-Land Enhanced Reconnaissance and Targeting Air-Land Force Air-Land Forces Application Agency Air-Land Forces Interface Study Air-Land Programs Office Air-Land Project Officer Air-Land Warfare Air-launch Air-Launched Anti-Radar Missile Air-Launched Anti-Radiation Missile Air-launched ballistic missile Air-launched ballistic missile Air-launched Decoy Missile Air-Launched Guided Missile Air-Launched Intercept Missile Air-Launched Missile