Applications

10 TPH Sawdust Dryer Production Line

    In Bulgaria’s forest-rich regions, the wood processing industry generates over 1.2 million tons of sawdust and wood shavings annually. Most of this waste was traditionally landfilled or burned, causing air pollution and violating EU Circular Economy Action Plan targets. A leading Bulgarian wood pellet manufacturer partnered with us to deploy a 10 TPH sawdust dryer production line, turning low-value sawdust into high-quality pellet feedstock while reducing carbon emissions by 3,200 tons per year.

Equipment Used

    Raw Material Hopper (Volume: 15 m³, with anti-bridging vibrator)

    Belt Conveyor (with metal detector, to remove foreign objects)

    Rotary Drum Dryer Φ1.8m×18m (our core equipment, with lifting flights and thermal insulation)

    Biomass Hot Air Furnace (fuel: wood chips, energy self-sufficient)

    Cyclone Dust Collector + Baghouse Filter (emission ≤5 mg/m³, meets EU EN 12752 standard)

    Vibrating Screen (to separate over-dried particles)

    PLC Control System (with moisture content sensor)

    Finished Product Silo (Volume: 50 m³)

Flow Description

    Raw Material Feeding

    Wet sawdust (moisture 55-60%) from the client’s plywood factory is loaded into the 15 m³ hopper. The anti-bridging vibrator ensures continuous feeding, while the metal detector prevents damage to downstream equipment—critical for handling Bulgaria’s mixed wood waste.

Drying Process

    Sawdust is conveyed to our Φ1.8m×18m rotary drum dryer, which uses counterflow hot air from the biomass furnace (800°C inlet temperature). The internal lifting flights evenly scatter the sawdust, creating a uniform drying environment. With a residence time of 45-60 minutes, the dryer reduces moisture to 10-12%—the optimal level for pelletizing. The thermal insulation layer minimizes heat loss, cutting energy costs by 18% compared to standard dryers.

Dust & Emission Control

    Exhaust gas (120°C outlet temperature) passes through a cyclone to capture large dust particles, then a baghouse filter to remove fine particles (efficiency ≥99.9%). This ensures emissions stay below 5 mg/m³, fully complying with Bulgaria’s National Emission Limit Values (NELV) and EU standards.

Quality Screening & Storage

    Dried sawdust is screened to remove over-dried particles (>8% moisture), which are recycled back to the dryer. The qualified material is stored in the 50 m³ silo, ready for pelletizing. The PLC system’s moisture sensor automatically adjusts the dryer’s rotation speed and hot air temperature to maintain consistent output quality.

Client Feedback

    Before installing the sawdust dryer, we spent €120,000 annually on landfill fees and faced EU fines for illegal burning. Now, the 10 TPH line turns our waste into a raw material that generates €480,000 in annual revenue from pellet sales. The rotary drum dryer’s energy efficiency—using our own wood chips as fuel—cuts our energy costs by 70%. The team’s ability to design a system that meets Bulgaria’s strict environmental standards and local wood waste characteristics has made this a truly sustainable investment. We plan to expand to a 20 TPH line in 2026.

— Ivan Petrov, Technical Director, Bulgarian Wood Pellet Co.

Supplement

    The dryer’s high-chrome steel lifting flights resist abrasion from Bulgaria’s hard oak and beech sawdust, extending service life to 24-30 months.

    The biomass furnace can switch to natural gas for winter operation, ensuring uninterrupted production during Bulgaria’s cold seasons.

The line can be upgraded with a heat recovery system to preheat incoming sawdust, further reducing energy consumption by 12%.