What conditions do companies that want to do wood heat treatment need to apply for?

Thermo Wood's high-temperature heat treatment process is to dry logs or air-dried wood first, and then steam heat treatment. The treatment temperature is generally 180℃ to 250℃, and the treatment time is 0.5 to 4 hours. The whole treatment process is divided into three stages: heating, treatment and cooling.

Platowood's production process mainly consists of two heat treatment stages at different temperatures. The first stage, under the pressure condition, the wood is heat-treated at 160℃ to 190℃, and then the moisture content of the heat-treated wood is reduced by drying; In the second stage, the dried wood is heat-treated at the temperature of 170℃ to 190℃, and the treatment time depends on the tree species, thickness and shape of the wood.

The correction is to heat treat the wood with water content of 12% with nitrogen as the medium. The treatment temperature is generally 200℃~ 240℃, and its oxygen content does not exceed 2%. It is necessary to accurately control the temperature during heat treatment, because the slight change of temperature will have a very important impact on the final properties of heat-treated materials.

Wood is a natural biological material. As a building and interior decoration material, wood has many advantages, such as light weight and high strength; Easy to process, low energy required for processing, and not easy to pollute the environment; Good insulation against heat and electricity; Has good acoustic characteristics; Wood materials have a strong cushioning effect on vibration; Wood has a mark before it is destroyed; Wood resource materials have natural and beautiful patterns, luster and colors, and have special decorative effects. As an indoor material, wood has the function of regulating indoor relative humidity.

However, as a naturally occurring creature, wood also has some bad inherent characteristics, among which the most difficult problems in wood processing and utilization are the wet expansion and dry shrinkage of wood, warping and cracking caused by inconsistent dimensional changes in all directions. Many researchers have been working hard to study and actively explore the methods of stabilizing wood size, accumulated experience and achieved certain results. It is recognized that the existence and change of moisture is the fundamental reason for the dimensional instability of wood.

The water absorption of carbonized wood is lower than that of non-carbonized wood, which can generally be guaranteed to be below 10%. Carbonization can solve the operating cost of pure solid wood processing industry. The moisture content is controlled, the stability of wood is increased, and the products are not easy to crack and deform. Although it increases the cost of processing wood, it reduces the overall operating cost.

Improve the stability of wood geometric size-it is not easy to crack and deform, so that the product is less affected by local environmental temperature and humidity. When wood is carbonized at high temperature, the content of hydrophilic factors in wood is reduced, the hygroscopicity of wood is reduced, the compressive stress inside wood is slowed down, and the exchange ability between carbonized wood and environmental moisture is significantly reduced, thus greatly reducing the deformation, shrinkage and wet swelling of wood due to moisture change in use, keeping the carbonized wood at a low moisture content in humid air, increasing the stability of products and reducing the problems such as cracking and deformation that are easy to occur in the process of using products by end users.