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What Is The External Cause That Affects The Drying Speed Of Wood?

Mar. 07, 2019

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Here is Bedchamber Spc Vinyl Floor Manufacturer talking about External Cause Affects The Drying Speed Of Wood. 

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Bedchamber Spc Vinyl Floor Manufacturer

External Factors

1. Temperature

Temperature is the main factor affecting the drying speed of wood. When the temperature rises, the water pressure in the wood increases, and the viscosity of the liquid free water decreases, which is conducive to promoting the flow and diffusion of moisture in the wood; the drying capacity of the copper wire drying medium is increased, and the evaporation rate of the surface moisture of the wood is accelerated. However, it is worth noting that if the temperature is too high, it will cause cracking and deformation of wood, reduce mechanical strength, discoloration, etc., and should be properly controlled.

2. Humidity

Relative humidity is an important factor affecting the drying speed of wood. In the case of the same temperature and airflow speed, the higher the relative humidity, the larger the partial pressure of water vapor in the medium, the more the water on the surface of the wood is less likely to evaporate into the medium, the slower the drying speed; when the relative humidity is low, the surface moisture evaporates quickly. The surface water content is reduced, the water content gradient is increased, the water diffusion is increased, and the drying speed is fast. However, if the relative humidity is too low, cracking and drying defects such as honeycombs may occur or even worsen.

3. Air circulation speed

Air circulation speed is another factor that affects the drying speed of wood. The high-speed airflow can destroy the saturated vapor boundary layer on the surface of the wood, thereby improving the heat transfer and mass transfer conditions between the medium and the wood, and accelerating the drying speed. For difficult dry materials or when the moisture content of the wood is low, the internal moisture movement of the wood determines the drying speed; it is not practical to increase the evaporation rate of the surface moisture by increasing the flow rate of the large medium, but it will increase the water content gradient and increase the drying. The danger of defects. Therefore, difficult materials do not require a large media circulation speed.

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