Different requirements for briquette machine when making briquettes from straw and sawdust?
In biomass briquette production, it is very important to choose a suitable briquette machine. If you choose the wrong equipment, it will not only waste money, but also lead to the complete stagnation of the production line. Many people mistakenly think that one machine can handle all raw materials, but in fact, straw and sawdust behave completely differently in the pressing process. In order to produce briquettes with high density, perfect shape and longer combustion time, it is necessary to choose suitable equipment according to the characteristics of raw materials.
1. Handling straw: The key lies in “compaction”
Straw is light in texture, long and loose in fiber, and the biggest problem is its low density and resilience. Straw is easy to rebound after pressing. If the briquette press pressure is insufficient, the briquette will collapse after cooling.
Equipment requirements:
High compression ratio: Equipment with high compression ratio is needed to completely exhaust air and firmly compact the fiber. Pretreatment: Straw raw materials can’t be directly wet and used, but must be crushed and dried. High moisture content is the main reason for the failure of straw briquetting.
Dust-proof design: straw will produce a lot of dust during processing, and the equipment should be equipped with sealed cavity or dust removal system to protect operators and machine parts.
2. Handling sawdust: The key lies in “fluidity”
The sawdust particles are small, and the sawdust flows like water. Poorly designed equipment can easily lead to the blockage of the hopper or the discharge port.
Equipment requirements:
Intelligent feeding system: the density is higher, but its fluidity is strong, which will bring different problems. It is necessary to force a screw feeder or a vibrating feeder to ensure that the raw materials enter the compression chamber stably and continuously, and avoid blockage and discontinuity.
Ventilation design: sawdust will trap air when compressed, and the mold needs to be provided with vent holes to exhaust air, otherwise the briquette will crack or break.
Lower pressure requirement: Lignin in sawdust is naturally adhesive, so it has lower pressure requirement and can save electricity.
Comparison table:
| Feature | Straw Briquette Machine | Sawdust Briquette Machine |
| Required Pressure | Very High (to overcome fiber spring-back) | Medium (relies on natural lignin) |
| Moisture Content | Strictly controlled (<15%) | Controlled (<12%), but less sensitive |
| Feeding System | Standard Conveyor | Forced Screw Feeder (Anti-blocking) |
| Key Weakness | Loose output, Dust | Hopper bridging, Cracks |
| Ideal Mold Type | Large diameter ring die or piston press | Ring die or flat die |
Purchase suggestion:
If straw and sawdust are treated at the same time, the same briquette making machine cannot be used simply by changing raw materials. It is necessary to adjust the compression ratio of the mold, feeding speed and drying settings. If you are not sure which model to choose, you can contact us to provide photos of raw materials, and we will provide you with a free feasibility analysis and quotation to help you build your biomass production line!