Biomass pellet fuel, as an environmentally friendly fuel, directly affects storage, transportation, and usage. Durability is a key indicator of its quality, including impact resistance, deformation resistance, water resistance, and moisture absorption resistance.
Impact Resistance
Definition: Impact resistance reflects the ability of the fuel to withstand drops and collisions during transportation and handling.
Testing Method:
- Cut the fuel pellets into lengths of 60-100mm.
- Drop them from a height of 2 meters onto a hard surface.
- Drop any pellet larger than 25mm again (three times total).
- Measure the percentage of pellets larger than 25mm after the drop to indicate impact resistance.
Evaluation Standard: The stronger the impact resistance, the less fuel loss during transportation and handling.
Deformation Resistance
Definition: Deformation resistance reflects the ability of the fuel to maintain its shape under external pressure during stacking or storage.
Testing Method:
- Place the fuel sample in a testing machine and gradually apply pressure until the fuel breaks.
- Record the maximum pressure for each sample, repeating the process five times and averaging the results.
Evaluation Standard: Fuel with higher deformation resistance does not easily deform under pressure and is suitable for large-scale storage.
Water Resistance
Definition: Water resistance reflects the ability of the fuel to maintain its integrity when exposed to water.
Testing Method:
- Place the fuel sample 25mm below the water surface at 27°C.
- Observe how long it takes for the fuel to degrade. Take the average of five observations.
Evaluation Standard: The longer the fuel remains intact, the better its water resistance, making it suitable for storage and transportation in humid conditions.
Moisture Absorption Resistance
Definition: Moisture absorption resistance reflects the fuel's ability to resist absorbing moisture in a high-humidity environment, and the percentage increase in weight shows the absorption rate.
Testing Method:
- Place the fuel in a sealed environment with high humidity (relative humidity 90%).
- Observe and record the weight change of the fuel daily.
Evaluation Standard: Fuels with stronger moisture absorption resistance are less likely to deform in humid conditions, offering better storage performance.
Importance of Durability and Comprehensive Assessment
Durability is an important factor that affects the packaging, transportation, and storage performance of biomass pellet fuel. Its main indicators are impact resistance, deformation resistance, water resistance, and moisture absorption resistance.
Testing Purpose: Ensure the fuel does not break, deform, or absorb moisture during handling, stacking, and storage.
Assessment Method: Perform individual tests for each durability indicator, and then combine results from multiple tests to calculate an average value.
Key Points for Comprehensive Identification
- Fuel Density: Fuels with higher density typically have better durability, water resistance, moisture absorption resistance, and deformation resistance.
- Appearance and Hardness: Fuels with smooth surfaces, uniform color, and high hardness usually have better durability.
- Dynamic Assessment: Simulate actual transportation, stacking, and storage conditions to observe changes in the fuel's physical properties.
