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With the growing awareness of environmental protection, biomass pellets are increasingly valued as a renewable energy source. However, many customers find that the pellets produced by newly purchased biomass pellet machines do not meet expectations, with common issues such as rough pellet surfaces, excessive powder production, and poor pellet appearance. In this article, we will analyze these problems from multiple perspectives and provide solutions.
The mold plays a critical role in the pelletizing process. The mold of a newly purchased biomass pellet machine must undergo grinding treatment before the first use.
Mold Grinding: The mold's surface needs to be professionally ground. Only a smooth mold surface can effectively reduce friction and ensure the pellets are smooth. During the first use, it is recommended to mix about 10% machine oil with the wood chips to help the mold form initial lubrication and reduce wear.
Mold Maintenance: Regular inspection and maintenance of the mold are crucial to prevent quality issues due to mold wear. Timely cleaning and lubrication can extend the lifespan of the mold.
The moisture content of raw materials is key to successful pellet formation. Biomass materials, such as straw or wood chips, should ideally have a moisture content between 15% and 20%.
Excessive Moisture vs. Too Dry:
Excessive Moisture: Wet materials cannot bind together properly during pellet formation, leading to loose pellets and difficulty in forming.
Too Dry: Dry materials tend to produce excessive powder during processing, reducing pellet formation rates and wasting raw materials.
Moisture Measurement Tools: It is recommended to use professional moisture meters to ensure the raw material moisture is within the optimal range.
The particle size of raw materials directly impacts pellet production efficiency. It is recommended to process the raw materials to a size of 1-5mm.
Coarse Particles: Large particles result in low pellet formation rates and increase wear on the press roller and mold.
Fine Particles: Small particles may increase energy consumption because more power is required to compress them into pellets.
Sieving Equipment: Use sieving equipment to adjust the particle size of the raw materials, ensuring an appropriate particle size distribution.
It is essential to pay attention to the correct gap between the mold and press roller assembly during operation, as this directly affects pellet formation.
Adjusting the Gap: A gap that is too large will prevent pellet formation, while a gap that is too small can damage the machine. Maintaining a proper gap improves pellet quality and extends the machine's lifespan.
Operator Training: It is advisable to provide professional training for operators to ensure they are familiar with proper operational procedures.
Mechanical failures can also affect pellet quality. Common issues include damage to bearings, molds, or press rollers, as well as problems with the lubrication system.
Regular Maintenance: Regularly perform comprehensive maintenance on the equipment, promptly replacing damaged parts to ensure all components function correctly.
Choosing High-Quality Equipment: It is recommended to choose products from reputable manufacturers to ensure quality and after-sales support.
The quality of biomass pellets is influenced by multiple factors. By properly maintaining molds, managing raw material moisture, optimizing particle size, ensuring correct operation, and conducting regular mechanical maintenance, users can significantly improve the pelletizing efficiency and pellet quality. We hope the suggestions provided above help resolve any issues encountered during operation and contribute to the development of biomass fuel.
This is a detailed analysis of the reasons for poor pelletizing performance in biomass pellet machines and their solutions. We hope this article proves helpful to you.