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HF vacuum timber dryer machine use details
HF vacuum timber dryer machine refers to the use of appropriate drying technology and equipment to continuously remove moisture from the wood under the premise of ensuring the quality of the wood. The moisture in the wood includes free water, suction water and mixed water. Free water exists in the wood capillary system. (This kind of water is easy to remove during the wood drying process and has the highest content, for example, the free water content of paulownia is as high as 250%).
The manufacturer of HF vacuum timber dryer machine tells you that there is adsorbed water in the wood microcapillary. The moisture content of wood of different tree species is 2333%, and the average is 30%. Only when a certain amount of energy is obtained and the binding capacity of the microcapillary is overcome, water can be discharged from the wood, and it is difficult to remove this water. Chemical water exists in the chemical composition of wood, and its content is about 1%. It cannot be removed by drying and is usually not considered. The concept of moisture commonly used in wood drying: refers to the moisture in the wood. The HF vacuum timber dryer machine manufacturer tells you that the ratio of the weight of moisture in the wood to the weight of the dry wood is called the moisture content, or simply called the moisture content, and is represented by W. Electrical measurement: A method to directly determine the moisture content based on the relationship between the electrical characteristics of wood and the moisture content. The resistance type wood moisture content tester is commonly used. Saturation point of wood fiber: The manufacturer of HF vacuum timber dryer machine tells you that when there is a large capillary tube, the free water of the wood will evaporate, but the water content of the wood in the capillary system is still saturated. The saturation point of wood fiber is the turning point of the change of wood properties. The increase or decrease of absorbed water will cause the expansion and contraction of wood, which will affect the dimensional stability of wood products and other physical properties of wood.
Balance moisture content of wood: HF vacuum timber dryer machine manufacturer tells you that after wood stays in the hot and humid air for a period of time, the moisture in the wood and the moisture in the air will no longer be exchanged. The moisture in the equilibrium state is called the equilibrium moisture in the air. content. About the content of this issue, share it here first. If you need HF vacuum timber dryer machine manufacturers to tell you, please contact us.