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Wood Drying with Vacuum Kiln Dryer is Faster and Environmentally Friendly

Wood Drying with a Vacuum Kiln Dryer is Faster and Environmentally Friendly. Currently, there are 2 models of wood drying with a kiln dry system, namely using a conventional system with a heating furnace or with a vacuum drying system.

The principle of drying wood with a vacuum kiln, basically, is to put the wood in a closed container and dry it at less than atmospheric pressure. The advantages of vacuum drying are shorter kiln drying cycle, better kiln drying quality, more energy saving and also Environmentally friendly:

• Shorter Drying Cycles — The key to shorter drying cycles or faster drying times is to increase the speed at which water moves from the center of the wood to the surface. Among the many factors that affect this speed, the resistance of the surrounding air is the largest. With vacuum technology, because the wood is being heated, the moisture inside the wood is pulled out through the vacuum system at the same time. As the amount of air decreases and the surrounding air resistance decreases at the same time, moisture is drawn out to form wood at an increasing rate, thereby speeding up the kiln drying process.
• Better Kiln-Drying Quality — In a vacuum environment, water vapor evaporates at a much lower temperature. Therefore, the wood can be dried at a lower temperature than a conventional kiln, thereby reducing the chance of defects caused by high temperature drying, such as internal checks, cracks, etc.

• Shorter Drying Cycles — The key to shorter drying cycles or faster drying times is to increase the speed at which water moves from the center of the wood to the surface. Among the many factors that affect this speed, the resistance of the surrounding air is the largest. With vacuum technology, because the wood is being heated, the moisture inside the wood is pulled out through the vacuum system at the same time. As the amount of air decreases and the surrounding air resistance decreases at the same time, moisture is drawn out to form wood at an increasing rate, thereby speeding up the kiln drying process.
• Better Kiln-Drying Quality — In a vacuum environment, water vapor evaporates at a much lower temperature. Therefore, the wood can be dried at a lower temperature than a conventional kiln, thereby reducing the chance of defects caused by high temperature drying, such as internal checks, cracks, etc.

• he drawback is that the size of the dried wood cannot be large because the capacity of the vacuum kiln (tube) is quite limited. The total volume in one run is also much smaller than in conventional kilns.

  This system absolutely requires qualified operators because there should be no errors at all and the operating costs are quite large compared to conventional kilns. Moreover, the investment cost is also large, it can be 3 to 4 times the investment of a conventional dry kiln.

  So why choose a vacuum kiln? When time and environment are top priorities, a vacuum kiln is the best choice. Using electric power that does not cause air pollution as conventional kilns that use wood or gas for combustion.
  

Air Drying on Wood (Air Dry) Before Drying in the Oven

Air Drying on Wood (Air Dry) Before Drying in the Oven. Before entering the dryer the wood must be handled properly. including the process of adjusting the air before entering the wood oven . In addition, treat before entering the oven machine is intended to make the wood is not damaged.

There are several things that need to be considered before the wood enters the oven room, several things must really be considered for maximum results.

Air Drying on Wood: Wind direction and wood arrangement

• Wind direction directly affects the wood drying process, especially on air circulation,
• Take into account the wind direction (land wind, sea or west-east and so on), except in kiln dry, chamber,
• Place the long direction of the wood perpendicular to the wind direction,