A hygroscopic agent is any substance that can absorb moisture from the air, also known as a desiccant. According to the state of the hygroscopic agent, it can be divided into three categories: solid hygroscopic agent, liquid hygroscopic agent, and gaseous hygroscopic agent.
The solid hygroscopic agent uses the adsorption principle to dehumidify the humid air; the liquid hygroscopic agent uses the absorption principle to dehumidify the air; the gaseous hygroscopic agent is compressed air, which is mixed with the humid air to realize the dilution and dehumidification of the humid air the goal of.
Solid hygroscopic agent: Using a porous substance with a large surface area to absorb moisture in the air under surface adsorption and capillary condensation. Since the partial pressure of water vapor on the surface of the solid hygroscopic agent is lower than the partial pressure of water vapor in the air, it absorbs the moisture in the air and achieves the purpose of air dehumidification.
Liquid absorbent: Use liquid absorbent with strong hygroscopic and moisture-holding capacity to directly treat air. When the liquid absorbent is in direct contact with moist air, the driving force is the partial pressure of water vapor in the air and the saturated vapor on the surface of the liquid absorbent pressure difference, so as to achieve the effect of air dehumidification.
Gas hygroscopic agent: The process of mixing two kinds of air with different humidity (dry air and moist air) to exchange heat and mass, so as to realize the effect of moist air dilution and dehumidification.
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