A pellet manufacture machine is a description used by some to illustrate either a pellet mill or pellet press. The operate of a pellet making machine can take many forms, from producing animal feed pellets to firewood fuel pellets, and even cookery pellets for wood pellet grills. Each pellet making machine has different characteristics depending on what sort of pellet they are generating and from what kind of raw material. Particle size and material density influence on which equipment are appropriate and the energy necessary. A wood pellet appliance has specific features which enable a wood pellet mechanism to produce biomass pellets more professionally.
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Wood is a high concentration biomass, it consequently requires more energy to squash the wood into pellet form. Consequently wood pellet machines generally have more power, or a lower gearing to increase torque to the pellet mill. Also to gelatinise wood requires more high temperature than many other wood raw materials. In many cases dry steam is used to heat the raw matter to the obligatory temperatures, this once more requires an additional source of fuel. Pellet creation is a skilled process, several variables and factors have to be controlled to produce an efficient process in producing quality pellets. Moisture control is a key feature of pellet making. To produce pellets, most raw resources require an average moisture percentage of between 10-15%. However the consistency of the batch in terms of moisture is also important. Poor evenness within the raw material will create poor consistency in pellet quality.
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Depending on the end use of the wood pellets, the raw matter used must be selected carefully. For instance premium fuel pellets demand a specific quality of raw material to produce an ash content below 1%. This means the wood sourced must contain nearly no bark, and be from a pine or spruce residue. Now the premium fuel pellet marketplace is dominant, however in the future more standard grades of pellets will come out.
As stated making wood pellets demands a greater amount of power during production. Making wood pellets also puts a greater demand on the bearings of the machinery and reduces the life of consumable parts such as dies and rollers. On the other hand many other biomass resources can also be upgraded into pellets for multiple uses, such as fuel pellets. On the other hand there are issues with other biomass pellets in their burning characteristics.
Pellet making as described is a skilled process, which is dependant on the raw matter having the correct features and qualities to produce a quality pellet. At PelHeat we develop small scale mobile pellet production units, and we also developed the Wood Pellet Production Guide.
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