Tech Team · Kintek Solution

Wood pellets are indeed made from sawdust. This is primarily due to the properties of sawdust that make it an ideal raw material for the production of wood pellets. Here's a detailed explanation:

Summary: Wood pellets are primarily made from sawdust, a byproduct of lumber and furniture mills. The process involves compressing the sawdust under high pressure and temperature, where the natural lignin in the wood acts as a binder, forming the pellets.

Explanation:

1. Raw Material Selection:

   • The primary raw material for wood pellets is sawdust. Sawdust is a waste product from various wood processing industries, including lumber and furniture mills. This material is chosen because it is readily available and renewable, aligning with environmental and economic sustainability goals.

2. Pelleting Process:

   • The pelleting technology involves compacting crushed and dried sawdust by extrusion through a pressing die. The sawdust, with a suitable fraction size and moisture content, is forced through holes in the die by a pressing tool. Under very high pressure and associated temperature, the lignin component of the wood plasticizes and acts as a binder, holding the pellets together.

3. Formation and Characteristics of Wood Pellets:

   • After passing through the pressing tool, the pellets are very hot and plastic. They gain hardness and mechanical resistance only after cooling. The cylindrical shape of the pellets and their uniform size facilitate efficient handling and combustion in small combustion plants. The final moisture content of wood pellets is controlled to be below 10% (wet basis), ensuring high energy density and efficient combustion.

4. Use and Advantages:

   • Wood pellets are used as a solid biofuel in automated combustion systems due to their suitability for such applications. They burn with a steady and smooth flame, providing a consistent heat source. The use of wood pellets also contributes to the utilization of waste materials, enhancing both environmental and economic potentials.

5. Environmental and Economic Benefits:

   • The production and use of wood pellets from sawdust contribute to the utilization of renewable resources and waste materials. This process supports a carbon-neutral route, converting low-energy biomass into high-energy density fuels, and has the potential to produce chemicals from bio-based resources, offering both environmental and economic benefits.

In conclusion, wood pellets are efficiently and sustainably produced from sawdust, leveraging the natural properties of wood to create a high-quality biofuel that supports both environmental conservation and economic viability.

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