Sawdust (or wood shavings) is a by-product or waste product of woodworking operations such as sawing, milling, planing, and routing. It is composed of small chippings of wood.
1. Feeder: feeding raw material into the pellet making chamber.the feeder is made of stainless steel.
2. Forced feeding unit: since the raw material is fluffy, and the bulking value is higher, we equip the force feeding device.
3. Pellet making unit: ring die and press roller inside work together to make the biomass wood raw material into wood pellet.
4. Main motor: driving the pellet making system.
5. We adopt the super quality Siemens brand motor in our machine.
1.Sufficient and cheap sawdust material source: Sawdust is the residue of wood processing factory. The amount of sawdust material is large and the price is cheap. Sawdust pellet mill can also be used to deal with life wastes such as leaves, straw and crops waste. It is a way to make waste profitable. And by making these biomass materials into fuel pellets, we no longer have worry how to dispose of these wastes.
2.Great demands for sawdust pellets: As the price of coal rise, finding coal fuel replacement is urgent. More and more people turn to biomass pellets. The market demand is large. Sawdust pellets not only be used at home in our daily life, but also can be applied to industrial production such as power plant.
Pelletization Process of Sawdust Pellet Production Line
Use sawdust as the main raw materials. To ensure sufficient raw material supplement and continuous production, the storage area should be around 500 square meters. You are suggested to prepare 500~600 tons of saw dust, which can ensure at least 15 days of pellet production. The ceiling of raw material warehouse should be able to resistant rain, lighting and wind. Set the production area at least 50 meters away from the living area, 30 meters away from the highway and power transformer. Besides, isolation measure and fire prevention facilities are also necessary, in order to ensure production safety.
Biomass pelletizing has strict requirements on the moisture content of raw materials. After screening, the saw dust will be sent to roller dryer by spiral conveyor. In the dryer machine, the sawdust can be dried to preset moisture content through hot air.
Sawdust Pelletizer is the key equipment of the complete pellet production line. In this system, we adopt 3 sets of BPM42 Ring Die Pellet Press which is featured of stable operation. The capacity of each set can reach 1.5 ton per hour. This pellet manufacturing machine can process saw dust, corn stalk, haulm, cotton stalks, peanut shells and many other biomass materials. The density of finished pellets can reach 1.0~1.3t/ m3.
When discharging from the pallet making machine, the temperature is around 80~90 ℃. The structure is relatively loose and easy to be broken. Through counter flow cooling system, the pellets will be cooled to room temperature and become tight and durable. Then, they can be packaged in bags or be conveyed to storage silo. Except cooling fan, the cooling system is also designed with cyclone separator which is used to separate the powder from the pellets and send the powder back to the front pelletizing procedure.
After cooling, screening system is needed to filter out broken pellets, so that to ensure the quality of final products. The broken pellets will also be sent to the front pelleting process.
Before packaging, the pellets will be screened again for recycling the fines. And then the pellets will be packaged. For domestic users, the pellets are preferred to be packed into bags with the sizes of 12, 15, or 20 kg. While for exporting, the pellets are usually shipped in one tone bags or in bulk which are usually wrapped in plastic to keep the moisture out. Compare with the large bulks or bags, the small bags are better for the pellets because the pellets are subject to less abrasion during delivery.
During summer, the production of wood pellets probably exceeds the demand and the pellets may have to be stored for several months. The storage facility should bee constructed of high concrete side walls that can withstand the pressure of the pellets. As stated, pellets easily disintegrate once they get wet, so it is very important that the building is water-tight, to prevent rain or condensation.
|Capacity||300-400kg/h||500-700kg/h||1.0-1.2 t/h||2.0-2.5 t/h||2.5-4 t/h||3-4.5 t/h|
With the sales contract, the order tracking clerk checks the models and quantities of each machine and spare parts.
Quality Test Before Delivery
Upon completion of the manufacturing of equipment, tthe quality inspector strictly checks quality of every machine with the checklist.
Check Items When Packing
Before packaging and shipment, the order tracking clerk checks the packaged items again with the packing list to avoid loss of items.
Sign the contract
Adopting international common standards for accurate design of product packaging, prevent product damage rate and the effective use of transport tools, which ensure the perfect delivery of products.
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