Wood Chip and Biomass Drum Dryers
UTEC Industrial fabricated massive motorized drum dryers for Weyerhaeuser, designed by Westec, processing wood chips and biomass from sawmill operations with precision CNC-machined components.
Project Overview
Lumber mills generate enormous volumes of wood chips, sawdust, and biomass as byproducts of the sawing process. Before these materials can be used for particleboard, pellet fuel, or other products, they must be dried to specific moisture content levels. Drum dryers accomplish this by tumbling the material through a heated rotating cylinder, using hot air to evaporate moisture efficiently and uniformly.
UTEC Industrial fabricated the key structural and mechanical components for these drum dryers, which are among the largest pieces of rotating equipment found in the forest products industry. The drums must maintain precise cylindrical geometry while operating under continuous thermal cycling and heavy mechanical loads from the tumbling material inside.
By converting wood waste into a usable product, these drum dryers contribute to both energy efficiency and sustainability in the forest products supply chain. The dried material serves as feedstock for wood pellets, composite boards, and biomass energy generation.
UTEC's Role
Westec provided the engineering design for the drum dryers, and UTEC served as the fabrication partner responsible for building the critical mechanical components. UTEC's CNC machining capabilities were essential for producing the precision-ground trunnion rollers, riding rings, and drive gear components that keep the massive drums rotating smoothly and reliably.
UTEC's fabrication team handled heavy plate rolling, welding, and assembly of the drum shells and internal flight systems that lift and cascade the material through the hot air stream. The combination of heavy fabrication capacity and precision machining allowed UTEC to produce all major components under one roof, ensuring dimensional consistency across the entire assembly.
Key Results
- Massive rotating drum structures for high-volume wood chip and biomass drying
- Precision CNC-machined trunnion rollers, riding rings, and drive components
- Heavy plate rolling and welding for drum shell fabrication
- Improved energy efficiency through optimized drying performance
- Supports sustainability by converting wood waste into usable products
- Designed by Westec, fabricated by UTEC under one roof
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