The desiccant rotor is divided into a processing zone and a regeneration zone by a sealing system inside the dehumidification section. The desiccant rotor rotates slowly at a certain speed to ensure that the entire dehumidification process is continuous. When the process air passes through the processing zone of the rotor, the water vapor in it is adsorbed by the hygroscopic medium in the rotor. Simultaneously, a phase change occurs in the water vapor, releasing latent heat, and the rotor gradually approaches saturation due to the absorption of a certain amount of moisture. At this point, the process air becomes dry and hot due to the reduction of its own moisture and the release of latent heat. Meanwhile, in the regeneration zone, another stream of air first passes through a regeneration heater, becoming high-temperature air, and then passes through the saturated rotor, causing the adsorbed moisture in the rotor to evaporate, thus restoring the rotor's dehumidification capacity. At the same time, the regeneration air becomes humid air due to the evaporation of moisture; afterwards, the humid air is discharged outdoors by a regeneration fan.
The most important core component of the desiccant rotor dehumidifier is the desiccant rotor. The rotor is composed of glass fiber and heat-resistant ceramic material as the internal support carrier, combined with a special hygroscopic medium material (such as high-efficiency silica gel). This combination of high-efficiency desiccant and the special honeycomb structure of the rotor not only ensures a large surface area for contact between the rotor and the air but also improves the rotor's dehumidification efficiency and increases its moisture absorption capacity. The rotor can be cleaned by gas purging to remove some mechanical contaminants from the rotor surface, such as dust and oil stains.
