Eco Compact Wood Chip Dryer
The Eco Compact Wood Chip Dryer is our second generation dryer. The concept was to design and develop a dryer with a compact footprint, which maintained the output of our original 40' containerized dryer. The results surpassed our expectations, as not only have we been able to maintain the same output with a footprint 75% smaller, we have also increased the electrical efficiency by an incredible 74%.
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To go along side the Eco Compact dryer we have dev...
To go along side the Eco Compact dryer we have developed a small economical dryer for customers who have a weak electricity supply or dont require a large output. The dryer consumes just 5kw (max) and is also available in single phase.
The Eco Compact Working Principles
To understand how the wood chip drying process works within the dryer, we will explain the working principle of the dryer.
Wood chip throughput
- Fresh Woodchip is fed into the top of the dryer via the vertical loading auger.
- As the woodchip enters the dryer, it falls left and right into two columns spanning the length of the dryer. The cross auger keeps moving the woodchip along the length of the dryer untill both columns are full.
- At the bottom of each column is a large rotary valve which controls the output of the woodchip. By controlling the pulse of these rotors, the user is able to set the dryer to automatically dry to the required moisture content.
- Finally a central cross auger at the bottom of the dryer feeds the dry woodchip into the vertical unloading auger.
Air Movement
Air Movement
- Air is drawn into the bottom two modules of the dryer. As the air enters the dryer it is heated by two large heat exchangers.
- The two centrifugal fans draw the hot air through two large ducts that run through the centre of the dryer and blow the air to the left and right hand sides.
- The air then forced through the two louvred columns filled with wood chip into the centre section of the dryer absorbing moisture in the process.
- In the centre section section of the dryer the air is forced upward into the top two modules where it passes back through the two louvred columns to the outside of the dryer, which at this point are full of moist wood chip. This second pass is key to the efficiency of the dryer as not only does it take out more moisture the cold damp wood chip recovers the heat from the air before it exits the dryer.
- Finally the air is forced to the front and rear of the dryer where it exits through the exhaust vents.
Design
Construction
The Dryer is constructed from Alu-zinc coated steel for excellent corrosion resistance. All parts of the main chassis are laser cut, folded and fixed together with a speed fastening system. This makes construction of the dryer very fast and economical.
Gearboxes
All gearboxes are supplied by STM uk. Working closely with them during the development of the dryer has ensured that all gearboxes have the correct torque factor to give maximum long term reliability. Using their highly efficient Bevel Helical gearbox which boasts an impressive 95% efficiency is an important of reducing electric consumption therefore improving the overall drying efficiency.
Technical Details - Eco Compact
Output Capacity (Average)
Kg/h: 420 kg - 25% moisture
Kg/24h: 10,080 kg - 25% moisture
Heat Consumption (Average)
Maximum: 250kw
Minimum: 50kw
Average Kw/t at 150kw: 360kw
Electricity Consumption (Average)
Drying (Fans) kw/h: 2.5kw
Material (Augers) kw/h: 3.5kw
Combined kw/h: 6kw
Average Kw/Ton: 14.5kw
Cost/Ton (@9.5p/kWh): £1.37
Technical Details - Basic
Output Capacity (Average)
Details here soon.
Heat Consumption
Maximum: 125kw
Minimum: 40kw
Average Kw/ton:
Electricity Consumption
Drying (Fans): 1.25kw
Material (Augers): 0.5kw
Total Average:
Average Kw/Ton:
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