Pellet mills come in various different shapes and sizes, including small scale pellet mill. There are various different designs of pellet mills, and some are more common than others in the design of small scale pellet mill. Also the size of the pellet mill can influence its ability to process various raw materials. Therefore a small scale pellet mill can produce wood pellet fuel out of certain materials, particularly high density materials, such as wood pellets and particularly hardwood pellets.

Conditioning and Power Requirements

The reasons most of small scale pellet mills can produce wood pellets, is they are developed with now design which provides sufficient power to compress and heat the wood. As wood is a much harder material than grass for example, either more power is required in terms of a larger motor, or a lower gearing. Wood melting is crucial to the pellet process and pellet binding. Wood melts at a much higher temperature than grass, and the friction generated in a new designed small mill is usually sufficient to reach the required temperatures. Larger pellet mills have a larger contact area, which generates more friction, and thus heat, and eventually to produce good wood pellet fuel.

Flat Die Pellet Mills Have Their Limits

There are two core principle designs of pellet mills, which is either a flat die or ring die design. Flat die pellet mills work on a vertical process design, with raw material entering from above and dropping down into the process area. The die is horizontal, with a set of rollers rotating across the surface. As the raw material falls from above, the rollers compress the material through the die in a vertical motion. Flat die pellet mills are a much more popular design for small scale pellet mill, mainly due to the fact they are mass produced in China. With years of development, their quality are trustable in some big factory.

Ring Die Pellet Mills Are The Best Option

Ring die pellet mills work in a different manner to flat die pellet mills. In a ring die pellet mill the die encompasses the rollers, hence the 'ring' description. The rollers apply pressure to the inner surface of the die, compressing material through the outer surface of the die. Material is forced fed horizontally into the centre of the ring, Pellets then fall vertically away from the ring. Small ring die pellet mills do exist, however they are not as popular due to their more complicated design and higher costs although they can produce premium wood pellet fuel.

Technical Guide on Wood & Biomass Pellets Production

At BiofuelTech we have many years of experience in pellet production, and we provide a pellet production consultation service. The Technical Guide on Wood & Biomass Pellets Production guide download will show you how to make wood and other fuel pellets. From more information, please visit our website: http://www.pelletmill.biz.