Timber Drying Kilns , Heat Treatment Systems

Timber Drying Systems

The lumber drying process is carried out for the purification of the liquid contained in the wood. The water that the wood material contains is transformed into water vapor by heat energy effect and dried. Providing the required amount of moisture as a technically high amount of heat energy is required in the process of providing the energy to dry the timber in the timber drying process of wood drying. Energy cost, time and efficiency. The most commonly used lumber drying systems in the world are the so-called classic lumber kilns, which operate with solid fuel, natural gas, solar energy, geothermal energy, electricity or petroleum fuels (Fossil Fuel).

Factors affecting working principles of lumber drying systems directly;

  • The density of wood material type (oak, pine, spruce)
  • Timber thickness level, height dimension
  • Moisture condensation in the material before drying
  • Climate conditions, geography
  • Heat energy and energy cost used in drying
  • Time
    The oldest known method used in timber drying is the open air circulation technique. Utilizing the climatic conditions, timber is a technique that is kept outdoors or in a dark depot with air circulation and lasts for one or several years depending on the type of wood and its density. Natural drying has disadvantages in terms of time and storage costs for achieving the ideal moisture level for wood. The products produced from natural wood-dried wood products are deteriorated due to the loss of moisture when they are exposed to heat in the places where they are used later. In case of natural dryness the timber is in an unprotected condition against bacteria and harmful insects, which causes destruction. Conventional timber drying ovens are preferred because they provide the desired ideal drying with the greatest disadvantages of the natural drying process but with high energy costs.

    Classic Timber Drying Systems

    Classic Timber Drying Systems

    Conventional timber drying systems use natural gas and electric energy to dry with steam heat in the furnace in stages providing heating, humidification and air circulation. The main structure of the furnace can be made of reinforced concrete or aluminum alloy sheet and thermal insulation materials. The oven which is heated with electric or natural gas is kept in the air with the help of a steam spraying unit. The humidity is automatically controlled by humidity meters located at different points by providing air circulation with the aid of a fan that distributes heat and moisture in the furnace. It is important that the equipment and equipments used in the lumber drying systems using the classical timber drying technique are constructed with complete and accurate calculations and sufficient air circulation is required in the furnace. The number of heating pipes that can reach the desired temperature within the ideal time depends on the pipe quality and all diameters. Controlling the active relative humidity in the furnace is one of the key elements in the efficient operation of the ventilation and humidification system used in the test.