Light Oil Steam Boiler

 

Product operating principle

 

The core of a light oil steam boiler is to atomize liquid fuel oil for combustion. Its operating principle is similar to that of a gas-fired boiler, but fuel pretreatment is the key.

1. Fuel supply and atomization: Light oil, after being pumped and filtered, is sent to the burner. Inside the burner, mechanical pressure or an air/steam medium breaks the oil flow into extremely fine atomized droplets, greatly increasing the contact area with air.
2. Combustion and heat transfer: The atomized oil droplets mix with air and are ignited by an electronic igniter in the combustion chamber, forming a high-temperature flame and flue gas. The high-temperature flue gas flows through the horizontal three-pass furnace and flue pipes, transferring heat to the water in the boiler drum, heating and vaporizing it to produce steam.
3. Boiler structures typically employ horizontal or vertical designs, such as the return flue in a horizontal internal combustion boiler or the baffles in a vertical boiler, to enhance heat exchange efficiency and ensure complete fuel combustion.

(*Calculated based on the calorific value of light oil of approximately 42,700 kJ/kg (10,200 kcal/kg).For reference only)

1)Main types:
a.No. 0 diesel (China VI emission standard): The most commonly used, with low sulfur content (≤10mg/kg), high cleanliness, complete combustion, and no preheating required
b.Light fuel oil (LFO): Such as MGO (marine light diesel oil), with properties similar to diesel oil.

2)Key Selection Criteria:
a.Viscosity and Flowability: Ensure proper pumping and atomization at the lowest ambient temperatures.
b.Cleanliness: A good filtration system is required to prevent impurities from clogging burner nozzles.

• Flexible fuel availability: No pipelines are required; fuel can be transported via storage tanks and fuel trucks, making it the preferred option in areas without gas pipeline networks.
• High calorific value and stable output: The fuel has a high and stable calorific value, ensuring the boiler's output.
• High backup reliability: It is an excellent backup or dual-fuel system option for natural gas boilers, ensuring energy security.
• Mature technology: Oil-fired boiler technology is very mature and highly automated.

In regions where piped natural gas is unavailable and LPG supply is uneconomical, light oil boilers remain of significant practical value due to their readily available fuel and reliable technology. Their core positioning is as a "regional energy solution" and a "highly reliable backup energy source."