Whether to coke or not is determined by the properties of the raw materials and has nothing to do with the production work of the pellet machine. Currently, the pellet fuel in the biomass pellet fuel market can be divided into rice husk pellets, peanut husk pellets, mixed wood pellets, pine wood pellets, lactiflora pine pellets, straw pellets, bamboo chip pellets, etc. according to the raw materials. Whether these pellets are coke is as follows:

1. Rice husk pellets are made of rice husks as the main raw material, with a calorific value of 3300 kcal/kg and ash content of about 15%. It is easier to coke when burned in the boiler.

2. Peanut shell pellets, with peanut shells as the main raw material, with a calorific value of 3,600 kcal/kg, and ash content of about 10%. It is easier to coke when burned in the boiler.

3. Mixed wood pellets, generally use various wood chips such as poplar and tangerine wood as the main raw materials, with a calorific value of 3,900 kcal/kg and ash content of about 5%. The combustion of coke in small boilers and burners is more serious, and the combustion of coke in large chain biomass boilers is less light.

4. Pine pellets are generally made of pine wood such as red pine and white pine as the main raw materials, with a calorific value of 4,200 kcal/kg and ash content of about 2%. They do not coke or are lighter in combustion in small boilers, burners, and steam generators, and do not coke in large chain biomass boilers.

5. Pine pellets, with high-quality pine as the main raw material, with a calorific value of 4300 kcal/kg, with ash content of less than 1%. It does not coke in combustion in small boilers, burners, and steam generators, and does not coke in large chain biomass boilers.

6. Straw pellets are made of corn stalks as the main raw material, with a calorific value of 3500-3800 kcal/kg. The raw materials are mostly mixed with impurities such as soil and sand, resulting in large ash content and contains sugar itself, which will produce a large amount of coke during combustion.

7. Bamboo chip pellets are also more serious in coking. Bamboo chip pellets contain oil and high calorific value. If you are in a region with rich raw materials for pressing bamboo chip pellets, it is recommended that you mix bamboo chips with wood chips to eliminate the coking characteristics of bamboo chips.

Through the above introduction, I believe everyone has already made it clear what factors affect whether the pellets are coking. Only by purchasing biomass pellets with low ash content can the coking rate be reduced. Don’t be greedy for cheap purchase of wood chip pellets with high ash content and low calorie value. Such pellets can be said to be "cheap for purchases and expensive to use."