Inside a 120,000-Ton Wood Pellet Production Line in Thailand
Thailand Wood Pellet Production Line Overview
This wood pellet production line in Thailand is designed to produce 120,000 tons of biomass fuel pellets annually using rubber wood with an initial moisture content of approximately 50%.
The project consists of two production lines, integrating wood chipping, crushing, screening, drying, pelletizing, cooling, conveying, and storage into one complete production system.
Designed for large-scale production, the plant combines reliable equipment with intelligent automation to achieve stable operation, efficient material handling, and consistent pellet quality. It provides a practical example of a modern biomass pellet production line built for processing high-moisture raw materials.
In the following sections, we'll first introduce the project's key features before taking a closer look at the complete pellet production process.
Project Highlights
Intelligent Control System
Each production section is equipped with an independent local operator station, while the entire production line is centrally managed through a PLC control system and centralized monitoring, making operation and monitoring more convenient.
Backup Power Protection
To improve operational safety, the plant is equipped with an emergency generator. In the event of an unexpected power outage, backup power helps protect critical equipment, especially the drying system.
Centralized Dust Collection
A centralized dust collection system is installed throughout the production line to create a cleaner working environment and support safe, efficient production.
High Level of Automation
From raw material feeding to finished pellet storage, the production process is highly automated, helping improve production efficiency while reducing manual operation.
Project Specifications
| Item | Specification |
|---|---|
| Project Location | Thailand |
| Annual Capacity | 120,000 Tons |
| Raw Material | Rubber Wood |
| Initial Moisture | Approximately 50% |
| Pellet Machines | 6 Units |
Wood Pellet Production Process
Wood Chipping Section
Rubber wood logs with an initial moisture content of approximately 50% are first transported by a vibrating conveyor into a heavy-duty wood chipper, where they are cut into wood chips measuring approximately 20 mm in length.
Instead of entering the drying system immediately, the wood chips are temporarily stored outdoors for natural pre-drying. This allows part of the moisture to evaporate naturally, helping reduce the energy required during the drying process and improving the overall efficiency of the production line.
Crushing Section
After pre-drying, the wood chips are conveyed into a twin-shaft feeder, which ensures a stable and continuous material supply before feeding them into the hammer mill.
Inside the hammer mill, the wood chips are processed into fine sawdust with a uniform particle size, providing suitable raw material for high-quality pellet production. Before crushing, a magnetic separator removes metal contaminants from the material stream, protecting downstream equipment from damage and helping maintain stable long-term operation.
Screening & Drying Section
The crushed sawdust is transported to a rotary screener, where oversized particles are removed to ensure a consistent particle size before drying.
Qualified material then enters a rotary dryer, where the moisture content is reduced from its initial level to approximately 10–15%, which is considered ideal for pellet production. Proper moisture control is essential for producing durable biomass pellets while maintaining stable pellet mill performance and reducing energy consumption.
Pelletizing Section
The dried material is conveyed into a hydraulic storage silo, which provides temporary storage and ensures a continuous material supply.
A top screw conveyor evenly distributes the material inside the silo, while the bottom hydraulic system drives the discharge mechanism to ensure a stable and continuous material flow. The material is then conveyed by belt conveyors to a twin-shaft buffer silo, which provides a consistent supply to the pellet machines, ensuring stable operation and continuous production.
Cooling & Screening Section
Freshly produced pellets leave the pellet machines at a relatively high temperature and moisture level. They are first transferred into a counterflow cooler, where ambient air reduces both temperature and residual moisture.
The cooled pellets then pass through a vibrating screener, which separates fines from qualified pellets. Finally, a belt weighing system automatically records production data, allowing operators to monitor hourly, daily, and monthly output in real time.
Conveying & Storage Section
Finished biomass pellets are transported by a 48-meter belt conveyor to a 96-meter mobile stacker, which automatically transfers the pellets to the storage yard.
This automated conveying system minimizes manual handling, improves storage efficiency, and prepares the finished pellets for bulk storage or shipment.
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