Wood pellet extruder, which might be constantly referred to as pellet presses or pellet press, are utilized to manufacture wood pellets for producing energy from ready raw material (wood chips, sawdust, planer shavings, etc.). Wood pellet extruder vary in size from 3 kilowatt to 375 kilowatt (five horsepower to 500 horsepower) or bigger. Production volume for wood pellets per pellet mill could possibly be range in from 90 kilograms per hour to 8 tones per hour (200 pounds to 9 tons). Loose wood items raw material is going to be compacted from about 100 kg/m3 to 650 kg/m3 (6.five lb/ft3 to 40.five lb/ft3) supplying an incredibly dense and efficient item.

The wood pellets are produced from a wood pellet extruder via pressing the raw material via little holes in a die. The die holes are round as well as the pellets are pushed from the inside out by rollers. The pellets are formed as a continuous cylinder shaped material and cut to length by a knife at the outside of the die.
Wood pellet extruder contains quite a few conditioning units installed above where liquids might be put into enhance pellet capacity. Water is at times added inside the type of steam resulting in firmer pellets.
From the conditioner of a wood pellet extruder, the wood feed stock falls into the centre of the wood pellet extruder. Within the wood pellet extruder, rollers and feed ploughs push the material via the holes from the die plate. The die plate is stationary and rollers rotate throughout the internal surface of the die, or the die rotates around the rollers. Outer knives cut the pellets to length necessary.

You'll find normally two kinds of dies inside the wood pellet extruder flat die or ring die. Die hole sizes generally range from approximately 2 mm up to 10 mm. The thickness of the die plate helps to figure out the compactness and stability of the wood pellet extruder. Pellet dies vary in thickness as considerably as approximately 100 mm thick. Wood pellet extruder dies are generally manufactured from metal alloys, stainless steel or high chrome. Pressures inside the die can reach up to 172,000 kPa (25,000 psi).
In a pellet plant, the wood pellets are transferred from the wood pellet extruder, to a cooler/drier to eliminate the heat which is produced throughout the press procedure. The moisture content of the pellets also is ought to be decreased for durability throughout storage and shipping. Pellets are then typically stored in silos or bins for bulk shipping or to be processed by packaging systems.

The pellets produced by pressing within the wood pellet extruder are utilized in energy producing systems like industrial boilers, pellet stoves and pellet barbeques. Every wood pellet could have close to the identical characteristics in size, moisture content too as energy value.