Heat Treatment Equipment: Dehumidification principle of wood drying equipment

The following is to introduce the dehumidification principle of wood drying equipment:

The dehumidification principle of lumber drying equipment is to use not saturated wet air to blow the wood that is dried, the equipment that absorbs moisture among them, to improve the moisture absorption ability of wet air, heat wet air first commonly. When the wood drying equipment makes the wet air pass through the heater under constant pressure, the outside world heats the wet air and the temperature of the wet air rises. However, the moisture content of wet air is not increased, and there is no condensation and precipitation of steam, so the relative humidity decreases for the same reason, so the hygroscopic ability is improved. It can be seen that the heating process in the heater is a constant humidity process of increasing temperature and enthalpy. When the heated wet air enters the dryer to dry wood, the heat release of the wet air (reducing the enthalpy of the wet air) makes the moisture in the wet material vaporize and enter the air, increasing the enthalpy of water vapor contained in the air. Thus, the drying process can be approximated as a definite enthalpy process in which air temperature decreases gradually and humidity increases gradually.

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