To ensure the smooth progress of the wood drying process, it is necessary to conduct a systematic inspection of the facilities in the drying room before each drying, especially the internal facilities. Otherwise, if problems occur during the drying process, it will seriously affect the production cycle and drying quality of wood drying, and also have an impact on the service life of the drying equipment. The equipment inspection before drying mainly includes the inspection of the various systems that make up the drying chamber.

A wood drying kiln is a device that uses hot air to dry wood. The drying principle is to heat the wood with hot air, causing the moisture molecules inside to evaporate, thereby achieving drying. The entire drying process is divided into three stages: preheating stage, normal temperature stage, and heating stage.

Wood can be carbonized by long-term pyrolysis treatment at high temperatures and pressures ranging from 180 ℃ to 250 ℃. The treatment of wood carbonization is a purely physical technique. In the process of wood carbonization, only temperature and water vapor are involved, and no chemical reagents or foreign objects are added. Therefore, carbonized wood is both environmentally friendly and safe, making it an environmentally friendly material.

The main elements of kiln drying wood drying equipments are described below: a) Construction materials: The wood drying kiln chambers are generally built of brick masonry, or hollow cement-concrete slabs. Sheet metal or prefabricated aluminium in a double-walled construction with sandwiched thermal insulation

The temperatures employed in wood drying kilns typically kill all the fungi and insects in the wood if a maximum dry-bulb temperature of above 60 °C is used for the drying schedule. This is not guaranteed in air drying.

Advantages of deep carbonized wood:1. Environment protection. 2.Purifying air. 3.Strong stability, less prone to cracking and deformation. 4.Corrosion resistance. 5.Degreasing, clean, and convenient processing

Thermally modified wood also known as carbonized wood.After dealing with the thermal modification of wood has excellent corrosion resistance and prevent erosion performance, and its own material also more stable.Won’t appear easily cracking phenomenon.Especially after heat treatment of wood appearance, far better than the untreated wood.

Kiln drying equipment investment is big, the craft is complex, high cost, but quick drying, takes short, can be dry to any final moisture content, convenient for industrial production. Drying effect is better than natural drying, mainly using the kiln dried wood.

1. Density reduction Mainly from the partial loss of hemicellulose. Most studies show that 5-8% of hemicellulose is degraded with little sacrifice in structural strength.

The stress that appears on the wood section under the action of external force is called external stress, and the stress inside the wood without external force is called internal stress. The cracking and deformation of wood without any external force proves that there is indeed internal stress inside the wood. For example, the cracking of wood is caused by the destruction of wood tissue due to the tensile stress inside the wood exceeding the tensile strength limit of wood.