A method to facilitate heat and moisture transfer from wood surfaces
A wood surface and wood technology, applied in wood heating, wood treatment, wood drying, etc., can solve the problems of high energy consumption, moisture and heat transfer obstacles, long drying cycle, etc.
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Embodiment 1
[0148] 1. Pretreatment of wood to be dried
[0149] The fir raw wood is processed into a thickness of 2-6cm, preferably 4cm; a length of 6-7.9m, preferably 7.5m to be dried wood, standby; wherein, the thickness of the fir board is consistent.
[0150] 2. Feeding
[0151] The wood is placed on the rollers at the input end of the roller conveyor of the wood transport device through the wood loading and unloading device, and the electric switch set between the two rollers at the input end of the roller conveyor is pressed by the wood and turned on, and the drive motor is started to drive the rollers to run. The wood is transported into the drying room from the entrance door on the left side of the drying room. When the wood enters the drying room through the entrance door, the wood blocks the infrared rays of the infrared transmitter A of the infrared monitor A installed on both sides of the entrance door, resulting in The infrared receiver A cannot receive the infrared signal e...
Embodiment 2
[0165] 1. Pretreatment of wood to be dried
[0166] The Chinese fir raw wood is made into a thickness of 4cm; the length is 7.5m to be dried, and it is set aside; wherein, the thickness of the Chinese fir board is the same.
[0167] 2. Measure the dry and wet bulb temperature of the drying medium, and calculate the relative humidity of the drying medium (ψ 介 )
[0168] The wood is automatically sent into the drying kiln through the transport device. When the infrared receiver A of the infrared monitor A can receive the signal from the transmitter A, the drive motor is turned off through the automatic control system, and the wood stops moving forward. At the same time, the heater and circulation are turned on. The fan heats the wood in the drying kiln, and controls the temperature of the drying medium in the drying kiln to be 50°C; and measures the dry and wet bulb temperatures of the drying medium in the drying kiln through the temperature sensor 51 installed in the center of...
Embodiment 3
[0177] 1. Pretreatment of wood to be dried
[0178] Processing timber thickness is 2cm, and length is 7.9m, and all the other are identical with embodiment 2 step 1).
[0179] 2. Measure the dry and wet bulb temperature of the drying medium, and calculate the relative humidity of the drying medium (ψ 介 )
[0180] Except that the temperature of the drying medium in the drying kiln is controlled to be 40° C., the rest are the same as step 2) of Example 2.
[0181] 3. During the wood drying process, real-time monitoring of the relative humidity of the wood surface (ψ 木表 )
[0182] Except that the humidity sensor 52 is arranged at a position 3 mm away from the upper surface of the wood, the rest is the same as step 2) of Embodiment 2.
[0183] 4. Except when ψ 木表 -ψ 介 When ψ 木表 -ψ 介 When it is 7%, except that the ultrasonic device is closed, the rest are identical with embodiment 2 step 4).
[0184] 5. Except when the drying medium in the drying kiln is relative humidity ...
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