With the development of technology, corn cobs, once regarded as worthless agricultural waste, now have new development opportunities. It contains a large amount of cellulose and lignin, which are the “indispensable core elements” for preparing biomass pellets. In addition, corn cobs have a similar calorific value to traditional biomass raw materials such as sawdust. This feature allows biomass pellets processed by pellet machines to be widely used in industrial boilers, home heating and biomass power generation. It can play an important role in many fields.

Corn cob pellet machine is a device specially used to crush agricultural waste such as corn cobs and process them into granular fuel or feed.

Corn cob pellet machine uses agricultural waste such as corn cobs, straw, and sawdust as the main raw materials, and is extruded by mechanical pressure without the addition of adhesives. The extrusion friction between the mold and the roller produces Generate high temperature to ripen the starch in the raw materials, coagulate the protein, and form high-density particles. The equipment usually includes a feeding device, a crushing chamber, a mold, a pressing roller, a transmission system, and a discharging device.

The emergence of corn cob pellet machine improves the efficiency of waste treatment and provides more resource utilization methods for agricultural production.

• Raw material preparation:

When using threshed corn cobs as the main raw material, it is necessary to first remove the outer bran and sponge inner core to separate the woody body in the middle.

• Crushing:

Use a hammer mill or a shredder to crush the corn cobs into granules or powders below 5mm for subsequent granulation. The smaller the particle size, the better the particle forming effect and the higher the density.

• Drying:

Use a dryer (such as a rotary drum dryer or an airflow dryer) to reduce the moisture content of the pellets to a level suitable for granulation. Usually the moisture content should be controlled between 10-13%. Too high a moisture content is easy to stick to the mold, and too low a moisture content is poorly formed.

• Granulation:

Feed the dried pellets into the pellet machine Press to form standard pellets, with common pellet diameters of 6mm, 8mm, 10mm and 12mm to improve combustion performance.

• Cooling:

The temperature of the newly-baked pellets is high and needs to be cooled by a cooler to prevent the pellets from breaking due to uneven water evaporation.

• Animal feed:

Because it is rich in energy and fiber, it is mixed with corn, soybean meal, etc. after being crushed, and processed into pellet feed by a pellet machine, which is very suitable as feed for livestock and poultry such as pigs, cattle, and sheep. This not only reduces the feed cost of farmers, but also increases the market demand for corn cobs.

• Boiler and kiln fuel

As an alternative fuel for industrial boilers and kilns, it can replace traditional energy sources such as coal and natural gas for power generation, heating and industrial production. Its high calorific value and full combustion characteristics can improve thermal efficiency and reduce pollutant emissions.

• Home heating and cooking

As a clean fuel, it is used in biomass pellet stoves, wall-mounted boilers and other equipment to provide efficient and low-pollution heat energy and improve rural heating conditions.

Generally speaking, the calorific value of corn cob pellet fuel is usually between 4000 and 4500 kcal, and the specific value is affected by factors such as raw material quality, production process and pellet density.

1. Raw materials
The moisture content, impurity content, and cellulose and hemicellulose content of corn cobs will affect its calorific value. High quality Corn cob raw materials can produce biomass pellets with higher calorific value.

2. Production process
During the production process of biomass pellets, the control of process parameters such as crushing particle size, drying degree, and compression ratio has an important influence on the calorific value of the pellets. Reasonable production process can improve the density and uniformity of the pellets, thereby improving their calorific value.

3. Particle density
The density of the pellets is closely related to their calorific value. High-density pellets can be more fully exposed to oxygen during combustion and release more heat. Baoke believes that improving the density of pellets by optimizing the production process is an effective way to improve the calorific value of corn cob pellet fuel.

1. Equipment temperature and pressure
Temperature and pressure that are too high or too low will cause the pellets to not form. Too low temperature will cause the material to be unable to form, and too high temperature will cause serious thermal decomposition of the surface, cracks, and affect the forming effect. Too high or too low pressure will also directly affect the forming rate of the pellets.

2. Raw material composition
The fiber structure and texture of the corn cob will affect the difficulty of curing it into pellets. Too hard texture or improper mixing ratio will affect the success rate of forming

3. Raw material moisture
The moisture content is crucial to pellet forming. Too high moisture content will cause the particles to be low in hardness and easy to loosen, while too low moisture content will make it difficult to form. Generally, the moisture content is required to be between 13% and 18%, and the specific value needs to be adjusted according to the raw materials.

4. Raw material particle size
A moderate raw material particle size (about 4-6mm) is conducive to forming. Too small particle size will increase the powder content, and too large particle size will lead to high energy consumption, low output, uneven particles and cracks.

5. Die roller gap
A gap between the die roller that is too large or too small will affect the granulation effect. If the gap is too large, it will be difficult to form, and if the gap is too small, it will easily wear the mold and the roller.

6. Mold wear
Excessive wear of the mold will reduce the pressure on the particles, affect the forming rate and increase the powder. The Baoke high-quality mold roller should be replaced in time to ensure the granulation effect.

7. Insufficient power
Aging of the pellet machine leads to insufficient power, abnormal motor speed, and inability to provide sufficient pressure for granulation. At this time, you should consider replacing the motor to resume normal production.