Corn Stalk Pellet Production Line

Corn stalks usually has a high potential of dust, which is affected by the way of harvesting. Thus, straw needs to be screened from contaminants, such as, dust that may influence straw pellet quality and other alien materials, such as, stones, metals, and those that may damage the pellet mill in the following procedures.

Corn straw biomass is a tube-like or pipe-like material with a diameter of 4 to 8 mm, and wall thickness around 0.3-0.6mm. With the tube/pipe-like structure, straw can be easily processed and get the desire particle size. Generally, the grinding of straws including cutting and crushing of the straws.Because the straw is very light, this section needs a forage grinder.

Usually, corn stalk delivered in form of air-dried bale, with the moisture around 15%, which is the proper for straw pellet production. Therefore the drying of straw pellets is often by-passed. Even if drying is needed for straw pellet production, straw requires far less drying comparing with sawdust.

Straw requires special conditioning to achieve desirable hardness. Corn stalk conditioning includes the application of steam(and/or water) and the addition of binding agents or additives. Conditioning is required to achieve the necessary temperature and moisture to get the malleability and to melt the lignin to act as binding agent. Binding agents are needed to strengthen the hardness of the pellets and also to decrease abrasion during pelletizing.

This is an optional section, only a few customers who use special processes will choose. If your raw materials contain enough natural lignin to be glued together,you do not need additives and can completely ignore this section.

The task of this section is to make corn stalk powder into pellets .Through the pressure between ring die and rollers, to make pellets . After pelletizing , the corn stalk pellets temperature is high about 70-80 ℃ . And have 98 % qualified pellets, 2 % powder .Because the corn stalk is too light , so it is difficult to enter into the pelletizing chamber , so we add a force feeder here, to make the pelletizing process normal working .

Corn stalk pellets come out from biomass pellet making machine, its temperature is around 70 ℃,by cooling system, it can cool down to room temperature immediately,and the hardness of pellets will become more stronger.

In this section, the bucket elevator raises the cooled pellets to a certain height degree, then enter the screener. The sieved pellets enter the finished product silo, the powder enters the corn straw pellet machine through the pipeline to repress the pellets.

In order to facilitate storage and transportation, the packaging process is necessary. Packaging scales have lower requirements. Customers can use Richi's packaging scales, or they can save freight costs and purchase them locally.

The dust generated in the corn straw pellet production process is recycled for granulation, reducing waste and increasing revenue.

Conveying System cover all applicatons thoughout your straw pellet value-added chain,from raw material intake to conveying finished pellets.We customize a system to meet your sapce and process needs,using any combination of elevators,through chain,belt and screw conveyors.

PLC is designed according to the requirement of the customer.It can also control automation level.Our PLC is provided by the top international brands in the industrial automation field such as Siemens, Schneider and Delta.