Production of boron powder by arc volatilization : T.Hagio et al.J. Mater. Science, Letters, vol 17, no 22, 1998, 1937–1939

Abstract

This chapter provides an overview of furnace oil burners. Fuel oils burn readily only in vaporized or gaseous state. The pot-type vaporizing burner can be used for the lighter fractions of gas oils, but combustion appliances using heavier fuel oils require special atomizing equipment for efficient combustion. Fuel-oil atomizers operate on two principles: (1) atomization by mechanical means, for example, pressure jet and rotary cup atomizers and (2) atomization by means of an atomizing fluid, for example, air at low, medium or high pressures, or steam. Pressure jet burner is the oldest type of mechanical atomizer and is still commonly used for large land and marine boilers. Rotary cup burner is a comparatively new burner, suitable for use with small installations and capable of using a variety of oil feeds without major modification. The chapter also discusses combustion characteristics of fuel oils. Combustion takes place initially in the vapor phase, so that evaporation or atomization must be sufficient to initiate combustion. After ignition, heat is supplied by the flame and by surrounding heated surfaces. With heavy residual oils and coal-tar products, a large oil film area is necessary to maintain combustion.