Grass pellets have been traditionally developed for animal feed, however there has been an increasing concern in grass pellets for the pellet fuel industry. Grass pellet machine might have different benefits to wood pellet mills. Grass pellet machine generally runs a higher speed than wood pellet mills. As grass possesses a lower density than wood, and is better to gelatinise, higher productivities through higher die speeds can also be achieved.

Flat Die Pellet Mills

Most of the time flat die pellet mills are chosen for grass pellet mills. One good reason for this is due to the design of the flat die pellet mills, it is easier to feed grass into the mill. Flat die pellet mills work with a vertical design, with raw material entering the mill mainly through gravity. As grass is a low density material it is easier to get the grass into the compression chamber. As ring die pellet mills need a feed system, it is harder to get sufficient material into the die at the required level. Also due to the vertical design of the ring die pellet mill, it is usually difficult to get the stuff to spread through the surface of the die.

Grass Pellets

Grass pellets have completely different combustion characteristics to wood pellets by way of example. Grass pellets in general will produce a much higher ash content, and perhaps create a clinker and slag formations. Another aspect of grass pellets that must be looking at before using in a pellet stove or boiler, is the increased risk of corrosion. During combustion many grass pellets will generate at a higher temperature corrosive, chloride. Most pellet stoves and boilers are created to purely burn premium wood pellets. If grass pellets are used in most pellet stoves and boilers, accelerated corrosion could destroy the machine within a few years. To learn more about pellet stoves and boilers which can burn grass pellets, please visit the guide.

Hemp Pellets

Hemp pellets are one of the few exceptions to grass pellets with regards to their combustion characteristics. Hemp is employed in the production of paper, plastics, clothes, rope, oil and even food. Hemp and waste hemp residues after processing can also be used to create fuel pellets. Hemp fuel pellets, unlike other grass pellets produce little ash, no clinker or slag formations and a very low corrosion risk. These properties will see hemp pellets as key biomass fuel pellet in the future.

Grass Pellet Production Guide

In this guide we produce small scale pellet machines which is often utilized to produce grass pellets. Pellet production could be a tricky process, it relies on consistent quality materials, and the correct equipment and set-up. One of the best comparisons is pellet production is very comparable to cooking.