High radio frequency vacuum wood drying kiln
- Category: Chemical Machinery & Equipment >>>
- Supplier: Shijiazhuang,Duotian,Machinery,Co.,Ltd.
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Product Overview
Description
High frequency vacuum wood drying kiln
High frequency (radio frequency) is a new method for wood drying. It saves time and energy. High frequency wave can penetrate the wood deeply. It is more than 10 times faster than steam drying and more uniform. In vacuum condition and lower temperature, vacuum can suck wood moisture out and double increase the heating efficiency. After drying, there are no crack, bending and color changing problem. High frequency vacuum wood drying kiln can dry all kinds of wood, especially for large square beam, hard wood, veneer and rosewood.
High frequency vacuum woo drying kiln can not only heat wet wood but also wood secondary drying. For secondary drying, it will take 10 to 20 hours according to different wood species, hardness, thickness and moisture content. They are of low power costs, fast wood turnover rate, convenient operation & floor space saving. It is the best choice for wood drying in different scale of furniture manufacturers.
High frequency vacuum woo drying kiln can not only heat wet wood but also wood secondary drying. For secondary drying, it will take 10 to 20 hours according to different wood species, hardness, thickness and moisture content. They are of low power costs, fast wood turnover rate, convenient operation & floor space saving. It is the best choice for wood drying in different scale of furniture manufacturers.
Heating theory
The wet wood medium located in the electrical field. The polarized water molecules become dipole. With millions of times direction change of electrical field per second, the molecules bring in very high temperature due to friction. Inside temperature is higher than wood surface because heat distributed on the surface. At the same time, the tank inside is negative pressure. Due to the function of temperature and pressure difference, the moisture in the wood core transfer from inside to surface rapidly. It is the main reason which causes high speed drying. Under vacuum condition, the water is easy to be boiling. For example, at -0.09Mpa, the water will boil at 50 ℃. It not only saves power but also dry the wood in low temperature.
Differences Between High Frequency Vacuum Wood Drying & Other Drying Methods
High frequency vacuum wood drying kiln is internal heating method. It makes water heat themselves. Totally different with conventional external
heating method (conductive drying method)
heating method (conductive drying method)
High frequency vacuum wood drying kiln can make wood inside temperature higher than surface. Together with pressure difference, it increases the transfer speed of wood moisture from inside to outside. Much better and conductive heating method.
During high frequency wood drying, the distance between two layers of electrodes should be 150-650mm. The large distance can reach to 500mm. Other drying method cannot reach to such thickness. It is very good at thick wood and hard wood drying.
High frequency heating makes wood temperature gradient less than normal heating method. So the inner stress is much less than others. The wood will not easy to crack.
High frequency vacuum wood drying kiln equips with hydraulic press. During the drying process, it will give pressure on wood. After drying, it can keep wood straight and correct the wood slightly.
Under vacuum condition, vaporization temperature is low. It makes low temperature wood drying come true. High frequency plus vacuum, can protect wood from cracking, bending and color changing problems.
Advantages
FAST DRYING SPEED
More than 10 times faster than conventional steam dryer.
GOOD DRYING QUALITY
No crack, no bending, high turnover rate.
STRESS REMOVING
It can remove stress of wood and make it easy for further procedures and stable quality
BACTERIA & WORM KILLING
When drying, high frequency wave can also kill bacteria & worm.
ENVIRONMENTAL FRIENDLY
Does not need boiler, no pollution.
FLEXIBLE
Small capacity, small space, more flexible and convenient.
Specs of high frequency vacuum wood drying kiln
Model | GGZ-3-DT | GGZ-4.5-DT | GGZ-6-DT | GGZ-10-DT | GGZ-13-DT | GGZ-18-DT | |||||
Loading Capacity | 3cbm 3*1*1m | 4.5cbm 4.5*1*1m | 6cbm 6*1*1m | 10.14cbm 6*1.3*1.3m | 13.52cbm 8*1.3*1.3m | 18cbm 10.5*1.3*1.3m | |||||
Power Supply | AC 380V, 50Hz, 3 phases or custom made | ||||||||||
HF Power | 20kw | 20kw | 30kw | 50kw | 60kw | 80kw | |||||
HF Frequency | 6.78MHz | ||||||||||
Cooling | Wind | Water | |||||||||
Drying Temperatures | 50 to 90 °C | ||||||||||
Temperature Control | 2 pcs of optical fiber sensors | ||||||||||
Vacuum Pressure | up to -0.092MPa | ||||||||||
About Duotian Machinery
Shijiazhuang Duotian Machinery Co., Ltd. is a professional manufacture specialized in developing, designing and producing high frequency dielectric heating and hydraulic pneumatic equipment. The main products are: HF generator, HF wood bending press machine, HF hot press machine, HF precision frame assembly machine, HF wood angle jointing machine, HF board jointing machine, HF board and frame assembly machine, HF musical instrument gluing equipment , HF vacuum wood dryer, and other special HF heating equipments.
Contact Us
Email: dthf2#duotianjx.com
Mob/Wechat/WhatsApp: +8618132079385
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