grass pellet mill

Grass pellets have really diverse combustion characteristics to wood pellets by way of example. Grass pellets in general will create a significantly greater ash content, and possibly produce a clinker and slag formations. One more aspect of grass pellets that need to be searching at just before utilizing in a pellet stove or boiler, will be the increased risk of corrosion. In the course of combustion several grass pellets will create at a greater temperature corrosive, chloride. Most pellet stoves and boilers are created to purely burn premium wood pellets. If grass pellets are utilised in most pellet stoves and boilers, accelerated corrosion could destroy the unit inside several years.

Grass pellets have been traditionally produced for animal feed, however there has been a growing interest in grass pellets for the pellet fuel industry. Grass pellet mills can have different features to wood pellet mills. Grass pellet mills generally operate at higher speeds than wood pellet mills. As grass has a lower density than wood, and is easier to gelatinise, higher productivities through higher die speeds can also be achieved, reducing the cost per ton of grass pellets.

In many cases flat die pellet mills are chosen for grass pellet mills. One of the reasons for this is due to the very low cost of many flat die pellet mills from China. Flat die pellet mills work on 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. Ring die pellet mills require a feed system, and therefore generally cost more. However ring die pellet mills have more control over the process and therefore pellet quality.