6.7.1 Pressure Jet Burner

The pressure jet burner is a fundamental component used in steam boiler systems to introduce and prepare fuel for combustion.

6.7.2 How Fuel Oil is Atomized

The pressure jet atomizer utilizes the supply pressure energy to atomize the fuel into a spray of finely dispersed droplets. When an adequate high fuel pressure is used, the orifice in the burner nozzle atomizes the fuel to achieve good combustion.

The fuel oil is fed into the swirl chamber by means of the tangential ports in the main atomizer body. An air cone is set up due to the vortex formed in the swirl chamber; this results in the fuel leaving the final orifice as a thin annular film of finally atomized fuel oil.

6.7.3 Attention Required by the Burner Tip

The proper maintenance of the burner tip is critical for operational efficiency. Fuel consumption increases significantly with dirty and worn-out tips, making frequent cleaning and replacement essential.

There is a small filter located before the nozzle tip, which must also be cleaned frequently. It is best practice to never interchange the parts of the nozzle and instead consider replacing the whole unit.

Maintenance Protocol

• Use the tools provided by the manufacturer for cleaning spray nozzle holes.

• Using a cleaning needle, clean the spray hole carefully.

• After cleaning is carried out, check the nozzle spray holes size/shape by a go no go gauge to accurately decide the condition of the nozzle hole and determine if replacement is necessary.