pelletizing press

Pelletizing press, which is always referred to as pellet mill or pellet press, are used to manufacture wood pellets for producing energy from prepared raw material (wood chips, sawdust, planer shavings, etc.). Pelletizing press machine vary in size from 3 kilowatt to 375 kilowatt (5 horsepower to 500 horsepower) or larger. Production volume for wood pellets per pelletizing press can be range in from 90 kilograms per hour to 8 tons per hour (200 pounds to 9 tons).  Loose wood products raw material will be compacted from about 100 kg/m3 to 650 kg/m3 (6.5 lb/ft3 to 40.5 lb/ft3) providing an extremely dense and efficient product.

Small Pelletizing Machine For Famliy Use



The wood pellets are produced from a pelletizing press through pressing the raw material through small holes in a die. The die holes are round and 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.

Turn on the pelletizing press, feed the sawdust raw materials into the hopper slowly



Pellet cutter can control the length of the pellets



Pelletizing press contains one or more conditioning units installed above where liquids can be added to improve pellet ability. Water is sometimes added in the form of steam resulting in firmer pellets.

Adjust the raw material moisture content


From the conditioner of a pelletizing press, the wood feed stock falls into the centre of the pelletizing press.  In the pelletizing press, rollers and feed ploughs push the material through the holes of the die plate. The die plate is stationary and rollers rotate around the inner surface of the die, or the die rotates around the rollers. Outer knives cut the pellets to length required.

Pelletizing Press Roller & Die


There are generally two types of dies in the pelletizing press – flat die or ring die.  Die hole sizes usually range from approximately 2 mm (.050”) up to 10 mm (.400”).  The thickness of the die plate helps to determine the compactness and stability of the pelletizing press. Pellet dies vary in thickness up to approximately 100 mm (4”) thick.  Pelletizing press dies are usually manufactured from metal alloys, stainless steel or high chrome. Pressures in the die can reach up to 172,000 kPa (25,000 psi).