Straw Pellet Production Line

Turn Waste into Wealth- Complete Biomass Straw Recycling Solutions

The straw pellet production line is a comprehensive system designed to process agricultural residues, such as wheat straw, rice straw, barley straw, corn stalks, and other similar biomass materials, into high-density biofuel pellets. It includes a series of processes, from raw material preparation to crushing straw, drying straw, pelletizing straw, cooling straw pellets, and packing straw pellets. These straw pellets are a sustainable alternative to coal, oil, and natural gas for heating and power generation. With the increasing demand for biomass, investing in a straw pellet line is a good choice. We customize the straw pellet plant with capacities ranging from 500 kg/h to 10 tons/h for our customers according to their biomass materials and special conditions, offering complete straw pellet production solutions.

Raw Materials Suitable for Straw Pellet Production Line
Wheat straw
Rice straw
Barley straw
Corn stalks
Cotton stalks
Sunflower husks
Sorghum stalks
Sugarcane bagasse
Other crop residues

Straw Pelletizing Process Flow
Straw Crushing → Drying (optional) → Pelletizing → Cooling → Screening → Packing

Output Pellet Specifications
Diameter: 6mm, 8mm, 10mm (customizable)
Length: 20–40mm (adjustable)
Bulk Density: 600–750 kg/m³
Calorific Value: ~4,000–4,500 kcal/kg
Ash Content: 3–5%

A standard straw pellet production line generally includes crushing straw, drying straw, straw pelletizing, straw pellet cooling, and straw pellet packing.

1. Straw Crushing
The straws are generally relatively long. They can not be directly put into the biomass pellet machine for pelletizing. It is necessary to use a biomass grinder to crush the straw to a uniform size powder of 2-3mm suitable for pelletizing.

2. Rotary Drum Dryer (if needed)
Dries raw material to an ideal moisture content of 10–15%.
The most suitable material for straw pelletizing has a moisture content of about 15%. Before pelletizing, a biomass dryer is used to reduce the moisture of the straw raw material to under 15%.

3. Biomass Pellet Machine (Ring Die or Flat Die)
Compresses straw powder into cylindrical pellets using high pressure and heat in the pellet machines.
After drying, the straw powders were fed to the straw pellet mill via the conveying equipment. The material passes through the feeder and enters the pelletizing chamber for pelletizing, and is finally converted into straw pellets under the extrusion of the ring die and pressure rollers, which are squeezed out of the ring die and cut off by the cutter device.

4. Pellet Cooler Machine
Reduces the temperature of freshly made pellets to prevent moisture buildup and spoilage.
The temperature of the freshly made straw pellets is around 80℃, and the moisture is around 25%, which will easily cause deterioration if directly packaged. It is necessary to reduce the moisture and temperature of the straw pellets by using a pellet cooling machine. This procedure increases the hardness of the pellets and extends the storage time of the straw pellets.

5. Vibrating Screener (optional)
Separates broken or powdery pellets for recycling.

6. Pellet Packing Machine
Automatically packs finished pellets into bags for sale or storage.

The straw pellets made with our straw pellet plants are smooth on the surface, strong on the inside, and uniform in size. It is very popular in the pellet sales market.

• Home heating (pellet stoves and boilers)
• Biomass power plants
• Industrial boilers and kilns
• Animal bedding (clean, absorbent straw pellets)
• Animal feed is easily digested and absorbed
• Fertilizer production

✅ High Efficiency: Processes large volumes of straw continuously.
✅ Flexible Capacity Customizable: Available in 500 kg/h to 10 tons/h output. Customized layout according to your conditions.
✅ Wide Application: Suitable for almost all biomass straw types and other fibrous biomass.
✅ Energy Efficient: Uses intelligent control systems and low-energy motors.
✅ Durable Equipment: Uses wear-resistant alloy steel rollers and dies.
✅ Easy to Operate & Maintain: Automatic controls, quick die change system. A1-2T/H straw pellet line only needs 2 workers to operate.

Biomass Hammer Mill
Straws are sent to the biomass hammer mill in this process to be ground. The biomass hammer mill is suitable for medium and large-scale straw processing. This hammer mill is equipped with advanced blade metallurgy and a heavy-duty rotor, which enables it be able to grind with a fineness of 50 mesh or more.
Model: HM600
Power: 30 kW
Capacity: 1500-2000kg/h
Dimension:1600*850*1350mm
Weight: 900kg

MZLH508 Ring Die Straw Pellet Machine (2 sets)
The ring die straw pellet mill is widely used in the mass industrial production of biomass pellets. It has a wide application and can be used to process wheat straw, palm husk, rice straw, paddy straw, sawdust, groundnut shell, rice husk, and many other agro-wastes. The ring die of this machine adopts international and advanced technology, which enables the machine to have a long service life and high quality. The ring die straw pellet mill is equipped with a permanent magnet device to remove impurities in the pelletizing process.

Large Ring Die Biomass Pellet Machine Video Show

Model: MZLH508
Capacity: 1.5t/h
Main motor power: 90kw
Screw feeder power: 2.2kw
Ring die inner diameter: 508mm
Ring die rotate speed: 150rpm
Roller outer diameter: 190mm
Roller quantity: 2
Roller working temperature: ≤85℃

Straw Pellet Cooler
Model: SKLN1.5
Production capacity: 3t/h
Cooling volume: 1.5m3
Cooling time: ≥6-10min
Power: 0.75kw
Air lock power: 1.1kw

Straw Pellet Packing Machine
The packing process is necessary to protect the straw pellets from damp and dust after cooling. This packing machine is equipped with a high-speed weighing system, which is characterized by high efficiency and flexibility.
Model: WDCS-50
Capacity: 200 – 250 bags/min(5-50kg/bag)
Power: 2.2kw
Dimension: 2*0.8*2.6m

The straw pellet production line can process various biomass raw materials. We can make high-quality straw pellets as long as we handle the raw materials’ size and moisture content well. The following list of raw materials is suitable for the straw pellet plant for your reference:

• Wooden Materials: Wooden materials are generally forest logs, leaves, wood chips, sawdust, and shavings. Generally, wood waste comes from forests, furniture factories, and so on. Wooden raw materials have a high calorific value, are easy to get raw materials, and are an excellent raw material for biomass pellet fuel.
• Grasses: such as alfalfa grass, miscanthus, hay, and so on. Grass is a natural plant that can be processed into pellets as a raw material for biomass as well as animal feed.
• Straw: Straw pellet production line can process all kinds of straw raw materials, such as corn stalks, wheat straw, cotton stalks, and so on.
• Other Biomass: bamboo, rice husk, organic fertilizer material, cow dung, chicken manure, and so on.

Please feel free to contact us for a free consultation. We can customize the biomass pellet production lines according to your conditions.