Environmental awareness has taken root in people's hearts, and environmental protection actions are urgent. Environmental protection issues are receiving increasing attention, and people are paying more and more attention. Doing a good job in environmental protection is equivalent to protecting our homeland and our health.
I. Technical Background: Value Reconstruction from Waste to Energy
The birth of the wood pellet machine stems from the global urgent demand for renewable energy and environmental protection. Sawdust, wood shavings, branches and other wood waste generated in traditional forestry processing have long been confronted with problems such as land occupation for stacking and pollution from incineration. The wood pellet machine, through physical compression technology, converts loose wood chips into high-density pellet fuel, turning the original "forestry waste" into a green resource that can replace fossil energy, and promoting the closed-loop cycle of "waste - fuel - energy".
Ii. Core Principles and Equipment Structure: The Technical Logic of Transforming Fragmentation into Integration
1. Working principle
The wood pellet machine adopts the principle of "extrusion molding" :
The pre-treated wood chips (with a moisture content of 10% - 15% and a particle size < 5mm) are conveyed into the pelletizing chamber by the conveying device.
Under the action of centrifugal force, the rotating pressure roller closely adheres to the inner wall of the ring die, squeezing the wood chips into the holes of the ring die.
The material is shaped under high pressure and extruded from the ring die hole to form cylindrical particles, which are then cut to the set length (usually 5 to 30mm) by a cutter.
2. Key structural components
Roller and ring die: Core components. The material of the roller is mostly wear-resistant alloy, and the diameter of the ring die hole determines the particle size (commonly 6 to 12mm).
Conditioning device: Some models are equipped with a steam conditioning device to soften wood chip fibers and enhance the particle formation rate and hardness.
Transmission system: The motor drives the pressure roller to rotate through gears or belts. Large equipment needs to be matched with high-power motors (30 to 300kW).
The technological innovation of wood pellet machines is not only an evolution of a single device, but also a subversion of the concept of resource utilization