Chinese fir piles can be widely used in some river slope protection projects and used as support poles for greening trees. So what are the factors that affect the drying of fir piles?

1. Temperature: Temperature is the main factor that affects the drying speed of fir wood piles. As the temperature increases, the water pressure in the fir wood piles increases, and the viscosity of liquid free water decreases, which is beneficial to promoting the flow and dispersion of water in the fir wood piles; copper wire drying medium The moisture dissolving ability is improved and the evaporation rate of water on the surface of the fir pile is accelerated. However, it is worth noting that if the temperature is too high, it will cause cracking and deformation of the fir pile, reduce the mechanical strength, discoloration, etc., and should be appropriately controlled.

2. Humidity: Relative humidity is an important factor that affects the drying speed of fir wood piles. When the temperature and air flow speed are the same, the higher the relative humidity, the greater the partial pressure of water vapor in the medium, and the less likely it is for moisture on the surface of the fir wood piles to flow into the medium. Transpiration, the slower the drying speed; when the relative humidity is low, the surface water evaporates quickly, the surface moisture content decreases, the moisture content gradient increases, the water dispersion increases, and the drying speed is faster. However, if the relative humidity is too low, cracks and honeycombs will be formed, etc. Drying defect problems occur or even worsen.

3. Air flow circulation speed: The air flow circulation speed is another factor that affects the drying speed of fir piles. The high-speed air flow can destroy the saturated steam boundary layer on the surface of the fir piles, thereby improving the heat transfer and mass transfer conditions between the medium and the fir piles, thus accelerating the drying process. Drying speed. For hard-to-dry wood or when the moisture content of the fir pile is low, the movement of water inside the fir pile determines the drying speed; it has no practical significance to accelerate the transpiration rate of surface water by increasing the medium flow rate, but will increase the moisture content gradient. , increasing the risk of drying defects. Therefore, difficult-to-dry materials do not require a large medium circulation speed.