Gravity Pellet Feeding System (Definition)

Gravity pellet feed system — is a system designed for the automated feeding of pellets into the fuel chamber of a boiler or burner, using gravity to move the fuel. It is an important component in pellet boilers and boiler installations, ensuring an uninterrupted and uniform supply of fuel without the need for complex mechanical or electrical drives.

Main features of the gravity pellet feeding system:

1. Principle of operation:
   • Using gravity: Fuel loaded into the upper hopper is fed into the combustion chamber or burner by gravity. This is possible due to the inclined or vertical arrangement of the pipelines through which the pellets roll down.
   • Simplicity of design: The gravity system is simple in design as it does not require moving parts such as augers or conveyors, minimizing the likelihood of breakdowns and the need for maintenance.
2. System components:
   • Bunker: Typically a container installed at a height in which pellets are stored before being fed into the boiler. The hopper can be built into the boiler unit or stand alone.
   • Feed pipe: Connects the bunker to the boiler fuel chamber or burner. The pipe has an inclined or vertical position, ensuring free rolling of pellets under the action of gravity.
   • Dosing devices: Some systems may have metering valves or dampers installed to regulate the amount of pellets supplied and prevent over-delivery.
3. Advantages:
   • Economical: The gravity pellet feeding system is one of the most economical, as it does not require additional energy costs for operation and has a low operating cost.
   • Reliability: Due to the absence of complex moving mechanisms, the gravity system is more reliable and less prone to breakdowns.
   • Ease of maintenance: Due to its simple design and no need for regular maintenance, the gravity system is easy to operate.
4. Application:
   • Small and medium boilers: Gravity pellet feeding system is most effectively used in small and medium pellet boilers where a reliable and simple fuel feeding system is required.
   • Autonomous boiler houses: Systems of this type are often used in autonomous boiler houses where it is necessary to minimize maintenance costs and energy consumption.

Gravity Pellet Feeding System: Main Advantages

The gravity pellet feed system is a simple, reliable and cost-effective way to supply fuel to pellet boilers and burners. It is ideal for installations where simplicity of design and minimal operating costs are important. Using gravity to move pellets ensures smooth operation of the system and minimizes the need for maintenance, making it a popular choice for heating systems of various sizes.