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wood drying curve When the wood is dried in a gaseous medium with a certain temperature and humidity, if the change of the moisture content of the wood is measured at regular intervals, and the time is taken as the abscissa and the moisture content is drawn on the ordinate, the curve is called the drying curve. (Figure 1-2). The drying process can be analyzed on the drying curve diagram. The whole process of wood drying can be divided into three stages.

What are the basic concepts of wood drying, do you know?

Before the drying kiln is used, a comprehensive and detailed inspection of its shell and equipment must be carried out to ensure the normal operation of the drying process. The specific inspection contents are as follows:

The first cabinet of wood drying kiln was exported to Chile, and the company developed the new South American market.

Internal stress, also known as internal force, is caused by uneven drying shrinkage. For example, when the surface of wood has started to dry and shrink, and the interior of the wood is still moist, the surface may dry and shrink while the interior does not, resulting in internal stress. When a straight and dry wooden board is sawed into a thin plate, it should immediately experience a phenomenon of warping, which is a manifestation of internal stress in wood. If a sawn wooden board has a convex surface facing inward, it indicates external tension and internal pressure.

As a heat exchange device that can continuously output heat, boilers are used in almost all fields of production. They not only have high efficiency but also greatly reduce the labor cost of enterprises. So, what are the selection methods for steam boilers used for drying wood? What is the special type of dry boiler? Let's learn about Zhongzheng Boiler together.

By usage environment According to the usage environment, it is divided into outdoor grade carbonized wood and indoor grade carbonized wood.

The mature heat treatment processes abroad mainly include Thermo Wood from Finland, Plato Wood from the Netherlands, and Correction from France.

Chemical modification of wood: Chemical reactants react with hydroxyl groups in the wood cell wall polymer, leading to the formation of covalent bonds between the reactants and the wood matrix Wood thermal modification: Heating wood leads to a certain degree of degradation of its components, resulting in the desired improvement in wood properties Wood surface modification: Chemical, physical, or biological (enzyme) reagents are applied to the wood surface to achieve the desired performance improvement.

For a person engaged in wood drying production, it is best to have diligent eyes, ears, legs, mind, mouth, and learning.