Industrial oil-fired boilers mainly utilize light diesel oil, heavy oil, and alcohol-based fuels. These fuels feature high calorific values and excellent combustion efficiency, making them suitable for industrial applications 

demanding high thermal output. The specific fuel selection requires enterprises to comprehensively consider factors such as boiler design, environmental requirements, and cost.

Primary Fuel Types:

1. Light Diesel Oil: Features lower density and viscosity, making it easier to atomize than heavy oil. A common fuel for oil-fired boilers, suitable for units with less stringent fuel requirements.

2. Heavy Oil: Derived from residual heavy crude oil fractions, it exhibits high viscosity and calorific value. A frequently used fuel for oil-fired boilers, ideal for applications requiring high thermal output.

3. Alcohol-based fuels: Such as methanol or ethanol, these are clean and environmentally friendly fuels with limited application scope, suitable for small-scale boilers.

Factors to Consider When Selecting Fuel

Cost and Supply: Fuel price, availability, and supply stability.

Calorific Value: Higher fuel calorific value provides greater heat output.

Environmental Requirements: Emission restrictions influence fuel selection.

Boiler Specifications: Different boiler designs and burners have specific fuel type requirements; compatibility must be considered.

In summary, industrial oil-fired boilers offer diverse fuel options ranging from traditional diesel and heavy oil to cleaner alcohol-based fuels. Enterprises can select the appropriate industrial fuel based on economic 

viability, efficiency, and environmental requirements for different industrial applications.