Can we blend Furnace oil with waste vegetable oil?

Blending furnace oil with waste vegetable oil is possible but requires careful consideration and proper testing. Here are a few key factors to keep in mind:

Heating Value:

Waste vegetable oil (WVO) typically has a lower heating value compared to furnace oil. This means you may need to use more WVO to generate the same amount of heat as furnace oil.

Density:

WVO is less dense than furnace oil. This density difference can affect the burning characteristics and efficiency of the furnace.

Flash Point:

The flash point of WVO is generally higher than that of furnace oil. This means WVO requires a higher temperature to ignite. Adjustments to the furnace's ignition system may be necessary.

Viscosity:

WVO is more viscous than furnace oil. This increased viscosity can affect the flow properties of the fuel and require adjustments to fuel pumps, filters, and injection systems.

Stability:

WVO can degrade over time, forming free fatty acids (FFAs) that can clog fuel lines and damage equipment. Proper filtration and regular monitoring of FFA levels are essential.

Emission:

Blending WVO with furnace oil can impact the emissions produced by the furnace. The presence of impurities in WVO, such as food particles, can contribute to emission issues.

Compatibility: Your specific furnace's design, age, and burner system may affect its compatibility with WVO blends. It's essential to consult the furnace manufacturer's guidelines and recommendations before blending WVO.

Testing:

Before using a WVO blend in your furnace, conduct proper testing and analysis. This may involve sending samples to a laboratory to determine the fuel's composition, flash point, viscosity, and compatibility.

Legal and Regulatory Considerations:

Depending on your location, there may be legal or regulatory requirements related to the use of waste vegetable oil as fuel. Ensure compliance with local regulations and obtain any necessary permits or licenses.

In summary, blending furnace oil with waste vegetable oil requires careful consideration and proper testing to ensure safety, efficiency, and compliance. It's advisable to consult with professionals experienced in alternative fuels and furnace modifications before attempting to blend these fuels.