In the case of the heat exchanger, the steam condensate is generally dumped to drain rather than returned to the boiler. This is done to prevent contamination of the water in the boiler system should the heat exchanger develop a leak. Oil Pumping Residual oil needs to be pumped not only from the storage tank to the burner, but is also continually circulated within the tank in order to maintain a consistent viscosity and keep the additives mixed. Electricity is used to operate this pump. Oil Additives Residual oil contains sulfur and vanadium, both of which create numerous problems for boiler operation, primarily corrosion.
Corrosion can occur in the storage tank and on boiler fireside surfaces.
Oil treatment chemicals are used to reduce harmful effects of the oil on the equipment. Oil Atomization Residual oil cannot be burned in the form that it is delivered to the burner. It must be atomized into tiny droplets and sprayed out to form a flame pattern. Atomization can be accomplished through the use of either steam or compressed air. This soot acts as an insulation and reduced the efficiency of heat transfer from the flame to the boiler water.