1. Debarking Procedure
Our wood debarking machine is designed especially for removing the barks of wood logs with high debarking efficiency of>95%. The machine is made up of a main body, motor, reducer, roller, and belt. It is powered by electricity, the motor drives the reducer and then passes the strength to the roller. During the roller running, there are teeth on the roller, the teeth can move the bark of the wood logs. Then the barks will fall down to the belt and transfer out of the machines. The wood logs will come through the debarking machine and discharge the wood at the end.
2. Chipping Procedure
Drum wood chipper is an ideal equipment to produce large capacity and good quality wood chips. Which is widely used in the wood chips production industry, paper plants, particle and fiberboard plants, etc. This machine is made up of a machine base, knife roller, feeding roller, belt conveyor, and hydraulic pressure system components. The machine base uses high-strength steel, which is the support of the foundation. The knife roller equips two blades to cut the materials. The feeding roller can fluctuate in a certain range with the help of a hydraulic system according to the thickness of different raw materials. The qualified chips fall through the sieve hole, and the big pieces can not come through there, so they will be chipped again to be qualified.
|Main Motor Power
|Feeding Roller Power
|Inlet Feeding Mouth Size
|Quantity of Stable Cutter
|Quantity of Bottom Cutter
|Quantity of Fly Cutter
|Feeding Flat conveyor Length
|Feeding Flat Conveyor Power
|Rotating Speed of Cutter
|Max Wood Diameter can Process
|Discharging Belt Conveyor Length
|Discharging Belt Conveyor Power
|Main Body Dimension
3. Drying Procedure
The best moisture content for pelletizing is 13-15%. 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 this material into the stove and provide heating to the whole system.
The rotary drum 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 12%, 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 product heat exchange, thus the material will be dried with high efficiency.
Rotary Dryer Technology Specification
|Drying raw material: wood chips
|Raw material moisture contains: 40-50%
|Rotary dryer main body size: 1.8 meters in diameter and 16 meters in length
|Capacity: 2-2.5 t/h
|Main motor power: 15 kW
|The motor of the fan: 30 kW
|The motor of the airlock: 1.1 kW
|Main body dip angle: 5 degree
|Main body rotating speed: 5 rpm
|Inlet hot air temperature: 150-250 degrees
|Discharge temperature: 60-80 degrees
|Main motor rotating speed: 970 rpm
|Reducer model: ZQ650
4. Wood Grinding Procedure
The hammer mill is applied mainly to grinding the raw material to make it suitable to make pellets. The wood hammer mill is composed of an electric motor, coupling, bearing, rotor, hinge pin, and hammer 8mm pore size sieve plate. The wood chips are transferred into the hammer mill by feeding conveyor and then enter into the grinding chamber. The wood chips are bated by the high-speed rotating hammers, then hit the sieve plate and bounce back. The beating and hitting will be continuous with the high-speed movement of the blades. Wood chips will be ground by the impact force from hammers and friction force from the sieve plate. Our hammer mill adopts a water drops shape grinding chamber which causes more times impact force and enhances grinding efficiency. Particles would come across the sieve with the help of centrifugal force and wind power.
5. 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 pallet 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 makes the depth of the 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.
6. 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.
7. 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. Pellet Packing Machine