When lighting up an oil-fired boiler with steam atomizing oil burners, what should be opened first?

In the context of lighting up an oil-fired boiler that utilizes steam atomizing oil burners, the first component that should be opened is the steam atomizing valve. This is important because the steam atomizing process is crucial for creating a fine mist of oil that can mix properly with air, which enhances the combustion efficiency.

When starting the burner, providing steam to the atomizing nozzle allows for proper atomization of the fuel oil. Once the oil is atomized, it can then be introduced into the combustion chamber more effectively when the other components, such as the fuel valve and combustion air fan, are opened. This sequence ensures that the mixture of fuel and air is optimal for ignition, reducing the chances of incomplete combustion or operational issues.

Opening the fuel valve or combustion air fan before the steam atomizing valve may lead to inefficiencies in combustion, and could potentially cause safety hazards, such as unburned fuel accumulating in the combustion chamber. Therefore, starting with the steam atomizing valve is essential for a safe and effective startup procedure.