Ⅰ、 Description of Wood Chip (Sawdust) Drying Production Line:
With the development of technology and the scarcity of resources, wood chips (sawdust), as well as various straw and edible mushroom residues, have been transformed from discarded waste into usable resources for the production of wood chip products and high ignition value biofuels. These all require wood chips and crushed waste residue to undergo a drying process. However, many drying equipment in the market is not suitable, and many biomass particle fuel manufacturers can only maintain production due to low efficiency of drying equipment, unsmooth operation of equipment, and product quality issues, resulting in low profits. As a result, biomass fuel and charcoal production enterprises are forced to seek professional manufacturing enterprises with high production equipment efficiency and good craftsmanship. The optimization design of drying equipment should first meet the requirements of producing high-quality and competitive products, followed by saving investment, smooth operation of mechanical equipment, low maintenance costs, high labor productivity, and taking into account labor conditions and environmental requirements.
Ⅱ、 Overview of Wood Chip (Sawdust) Drying Production Line:
Sawdust is an organic substance with a moisture content of around 40-50%, which requires a moisture content of around 12% after drying. Its main moisture content is free water and biological water, which are relatively easy to remove, while biological water is difficult to remove. The drying process of wood chips (sawdust) mainly considers factors such as output size, finished material characteristics, ease of operation, one-time investment, and operating costs. At present, most sawdust drying equipment uses airflow dryers, fluidized bed dryers, and rotary drum dryers. Among them, airflow dryers and drum dryers are widely used in sawdust drying, saving investment in airflow dryers, especially when the production is small. However, due to the extremely short drying time of airflow dryers and the inability to classify the thickness and fineness, it is easy to cause unstable drying water, blockage, and unreliable operation, This has resulted in the inability to match the rear equipment, resulting in a waste of investment and energy.
Ⅲ、 Description of sawdust dryer:
The special wood chip dryer is a drying equipment with a large processing capacity. It is designed and manufactured based on the specific characteristics of wood chips, analyzing the impact of the structure of the dryer on the yield, quality, and other factors of wood chips.
Based on the characteristics of sawdust materials, a comprehensive technical transformation has been carried out on the dryer to improve the filling rate and residence time of the materials in the cylinder. A new combined lifting device and multi-layer sleeve structure have been adopted to prevent air holes in the materials, allowing for sufficient heat exchange and dehydration of the sawdust; And a coarse and fine particle separation device has been added, greatly improving heat utilization rate and also increasing production.
Ⅳ、 Features of sawdust dryer:
1. Automatic control can ensure that the moisture content of the dried wood chips is uniform and stable.
2. Automatic stone removal and iron removal can ensure that impurities in the dried wood chips do not enter the subsequent process.
3. The investment required for equipment is 1/6 of that of imported products from abroad.
4. The self insulation thermal efficiency of the cylinder can reach over 70% (traditional single cylinder dryers only have a thermal efficiency of 35%), improving the thermal efficiency by over 50%.
5. Adopting tail transmission, the transmission is more stable and reliable; Thoroughly changing the rotation of the supporting roller often affects production due to slipping.
6. Compared to a single drum dryer, it reduces land occupation by about 50%, reduces civil engineering investment by about 50%, and reduces power consumption by 60%.
7. Multiple combinations of circumferential lifting materials are distributed to effectively regulate the drying time. Good drying effect.
8. The desired final moisture index can be easily adjusted according to user requirements.
9. Variable frequency speed regulation is adopted to control the material flow, and the final moisture index can be easily adjusted according to the user's needs.
10. The outlet temperature is low, and the dust removal equipment has been used for a long time, allowing continuous production to proceed to the next process.
11. Equipped with a new energy-saving hot air stove, it is efficient, energy-saving, thermally controllable, easy to operate, and reduces coal consumption by about 60%.
