1.5T/H Sawdust Pellet Plant

1. Rotary dryer
Our rotary dryer is designed especially for drying sawdust, wood shavings, wood chips, sugarcane bagasse and other small size high moisture contain material. The heating source of the dryer is pellets, wood, briquettes, coal, and any biomass material, feed these materials into the stove and provide heating to the whole system.

The rotary dryer is made up of a stove, rotary dryer main body, air fan, cyclone, airlock, pipeline, and electric control cabinet. The rotary dryer can reduce the moisture of the raw material from 55% to 15%, to make it suitable for producing briquettes and pellets. It adopts hot air to reduce the moisture content of the raw material. The hot air is generated through a heat stove at one end of the rotary body, then the hot air will flow with the help of the air fan’s suction and when raw material comes through the rotary body, hot air is pulled over the material and the product heat exchange, thus the material will be dried with high efficiency.

Technology Specification
1. Model: GX-18
2. Drying raw material: sawdust
3. Raw material moisture contains: 30-40%
4. Rotary dryer main body size: 1.5 meters in diameter and 11.5 meters in length
5. Capacity: 1.5-2 t/h
6. Main motor power: 7.5 Kw
7. Motor of the fan: 18.5 Kw
8. Motor of airlock: 0.75Kw
9. Main body dip angle: 5 degree
10. Main body rotating speed: 5 rpm
11. Inlet hot air temperature: 150-250 degrees
12. Discharge temperature: 60-80 degrees
13. Main motor rotating speed: 970 rpm
14. Reducer model: ZQ4502

2. Sawdust Pelletizing Procedure
The ring die wood pellet machine is the main equipment in the production line to make pellets, it compresses the dry finely pulverized material and transforms them into a cylinder shape pellet at a temperature of 80 degrees. The raw material is delivered into the pellet machine through the conveyor and then transferred into a rotating ring die by a feeder. Finely pulverized material will be pressed into the ring die through two press rollers. The resulting pressure compresses the material and extrudes it through the holes in the die.

The driving gear adopts the high-precision gear transmission structure. The bearing is SKF brand from Sweden, which is efficient and durable. The ring die adopts the coupling fastening method, which is increasing the speed of discharge compared with the past bolt fastening method. As a result, the capacity is 10-15% higher than the belt transmission structure. As per the ring die and roller of the wood pellet machine, we have fine machining with the alloyed steel. And our heating treatment is also different from the other domestic manufacturer, our carburizing treatment make the depth of hard facing 2mm, which improves the anti-abrasion of the ring die and roller more than 10 times, it can save the production cost heavily. We also produce flat die wood pellet machines for small capacity.

3. Cooling & Screening Procedure
The wood pellet cooler is used to reduce the temperature and moisture of the pellets, thus acquiring better hardness and strength. Also, it can enhance transport ability and storage ability. The vibrating screen after the cooler is used to remove underside produce and dust, which can be returned to the pellet mill. The cooler process is the refined technology of exposing processed products to an upward-moving stream of ambient airflow. As the air rises through the product, it is warmed, increasing the moisture-carrying capability of the air. The product entering the top of the cooling chamber is exposed to the warmest air available within the cooler. The product and air have opposite flows, the gradual heat transfer greatly enhances the product quality and reduces stress and fines.

4. Packing Procedure
After cooling, the wood pellet would be packed into bags in order to avoid being affected by dampness. Packed pellets would be transferred by truck and sold. Wood Pellet Packaging Machine