Most roller and flat dies in pellet machine are processed by high-heat treatment. After planing, drilling, milling, and also relieving richi pellet mill , there are generally many dustcloths inside the die openings, which may affect the pelletizing effects and production. Consequently, before starting a brand-new pellet machine, or after replacing a new die, you require to grind it completely.
We use oil combination to refine grind the roller and level die. The oil mixture is composed of 20% great sand, 65% biomass products( like sawdust), 15% waste engine oil. Before feeding the oil mix to the pellet machine, you should change the clearance in between roller as well as level die to 0.1-0.3 mm. The grinding procedure should last 15-40 min.
For ring die pellet mill, the grinding procedure requires more oil combination and longer time. The quantity of oil mix is 10% that of pellet manufacturing per hr. The grinding time is 30-50 minutes. And also the clearance between ring die as well as the roller is 0.1-0.4 mm.
Pretreatment of basic materials
The suitable wetness material of biomass materials need to between 14% and 20%. Dry materials are hard to take shape, moist products will make the pellets loose. The size of the raw products should be less than the hole size of pellet mill dies. Normally, the hole size of the pellet mill die is 6mm as well as 8mm, as well as the dimension of resource s need to be under 5mm, or they might obstruct the holes and also lower pellet production.
The adhesive force figures out the creating price of the pellets Most biomass products include lignin, which would thaw under heat as well as serve as binder. Yet some products like rice husk has reduced adhesive pressure. It need to be blended with sawdust or binders to make pellets
The density and size of the timber pellets.
The density of timber pellets is figured out by the opening size of the die. The length is figured out by the slicer. In level die pellet machine, the slicer is installed under the level die, while in ring die pellet machine, the slicer is mounted outside the ring die. Both of them can be adjusted to attain various dimensions. For your own usage, it is far better to be brief. For transportation and selling, it advise to be a little long.
After the wood pellets come out from the pellet machine, they are hot with some steams. They can be dried as well as cooled in an open field, or by a counter-flow colder. Quick cooling down can enhance the solidity of the wood pellets, and assist in storage space and transportation.
Don't close down the machine right after making pellets.
When you completed making pellets, don't shut the pellet machine down at once. Add some mixed oil and also biomass materials to the pellet machine and allow it run for 1-2 min. In this way, we can fill up the die openings with oil combination, to ensure that we can directly start making pellets the next time. With this procedure, we can not only keep the mold, however additionally conserve time. When the pellet machine quits, loosen up the adjusting screw as well as clear away the left materials.
The maintenance of roller, die, shafts and transmission
You should remove all difficult items and also steel blocks in raw materials prior to feeding them into the pellet machine, or they would trigger damages to the roller, die or primary shaft. You can mount a tubular magnet on the feed receptacle.
The heat inside the pelletizing chamber can reach up to 80 ℃, and also the roller sustains high pressure during operation. As there is no dust guard in the pellet machine, so you need to clean up the bearing every 2-5 hrs, and lubricate it with oil. After every 8 functioning hours, the primary shaft demand to be fueled oil. The transmission demand cleaning every half a year. If there is uncommon high heat in the gearbox, you can utilize better equipment oil as well as increase the clearance between the gears for maintenance. The attaching screw in the transmission component additionally need to be changed consistently.
How to change roller and also die?
When the rollers breaks, you can change the roller covering or the entire set of roller. If the bearing obtain loosened or secured, you need to replace the bearing as well as also the shaft.
In ring die pellet machine, simply loosen the hoop chuck, take the old ring die apart as well as change it with a brand-new one. If the ring die is repaired with screws, you need to drink the ring die gently, and also get rid of the screw with even strength.
In level die pellet machine, the level die is installed with preserving nuts in the keyway. On the 2 sides of the flat die, there are two in proportion screw holes. You can make use of the screw driver to press them out, or make use of a magnet to draw them out. During your pushing or drawing, keep the flat die vibrating with a hammer, to make sure that the screw will not embeded the screw hole.
Protection of the drive engine
Select the matched power according to the required production. If the power is not nearly enough, the production will be low and the pelletizing effect is poor. If the power is too big, it will certainly take in more power, speed up the exhaustion, and also shorten the life span of roller as well as die.
The test and fixing should be performed in power off condition. The machine needs to be positioned near the working area, so regarding decrease the relocating time as much as feasible. Secure it from water logging, rainfall, electric leakage, fire, etc.
Just when we use the pellet machine properly as well as preserve it regularly can we take full advantages of the pellet machine and prolong its functioning life.
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