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Basic knowledge of vacuum kiln drying

Views: 233     Author: Wendy     Publish Time: 2023-08-22      Origin: Site


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Basic knowledge of vacuum kiln drying

The selection of the ideal wood dry kiln for their requirements might be challenging for many sawmills or furniture businesses. It is crucial for sawmills and furniture manufacturers to select the best wood dry kiln for drying high-grade lumber because there are so many different types of kilns available on the market.

This article examines the vacuum kiln dryer, one of the more sophisticated dryer kilns on the market right now.

In contrast to current wood drying kilns, a vacuum pump is used to suction out the air when drying wood in a vacuum kiln. Vacuum is used during the entire drying process.It is common knowledge that a vacuum decreases water's boiling point. Water molecules begin to vaporize at 40–50°C when the vacuum dry kiln is operating at -0.07–-0.08 Mpa.

As a result, the wood is dried in an atmosphere with low temperatures and no oxygen, which can shorten the drying process and preserve the wood's natural color. On the other hand, normal kilns employ heat and air circulation to slowly dry the wood, which takes a long time to dry and requires careful handling by the workers, otherwise the quality of the wood may decline.

Systems for vacuum drying wood are widely available. What are the benefits of high-frequency vacuum lumber dries kiln systems as not all systems are created equal?

The High-Frequency Vacuum Kiln's Operation.

High-frequency medium heating and vacuum low-temperature drying are coupled to create high-frequency vacuum dry wood. It is a more efficient drying technique with little waste, making it particularly ideal for drying hardwood and hefty slabs of wood.

The heating source is an electric field with a high frequency. While the vacuum's absorption effect speeds up the evaporation of the moisture, the electric field equally radiates over the wood and penetrates it to directly heat the moisture.

The high frequency energy is uniformly concentrated on the moisture in the wood, and the more local moisture, the more the electric field distribution. The wood itself or other non-polar materials do not receive high frequency electric field; however, the electric field will penetrate the wood. The drying process is only the friction between the water molecules themselves to generate heat.

State of vacuum.

In order to achieve the goal of drying in a lower temperature state, the water in the high frequency dryer equipment is heated to 60 degrees Celsius nine starts to vaporize, greatly reducing the problem of wood cracking and deformation. This method is particularly suitable for drying more valuable wood that is temperature-sensitive.

Additionally, the dry process is accelerated even more by the action of negative vacuum pressure absorption.

Equipment For High-Frequency Vacuum Drying With Hydraulic Device

The drying oven has a hydraulic cylinder made of stainless steel that can exert 6 tons of pressure on the wood. The wood can be kept flat and prevented from bending by drying at this pressure. The wood doesn't show any signs of warping or breaking.

High-Frequency Vacuum Dryer Kiln Features.

Touch screen console, humanized control interface, and more logical and scientific design concepts. Automatic drainage, heating, opening or closing of the vacuum and high frequency system, and ease of use. Traditional humidity measurement is affected less by high frequency electric fields when using a humidity management system, which allows for more precise drying process detection.

System for cooling towers

The steam from the wood drying process is cooled, condensed into water, and then pumped out by the vacuum pump. The water then flows into the water storage tank.

Timber cart

The wood may be fed and discharged into the vacuum kiln more easily, reducing labor costs.

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