How to improve the drying speed of plastic desiccant dryer
In various industries in the industrial field, we can see the presence of dryer equipment. Plastic dehumidifying dryer is a drying equipment with a high market share. In different industries, it has different names, such as three-in-one dehumidifying dryer. Plastic dehumidifying dryers have high drying efficiency and long service life, which are favored by consumers.
The dehumidifying, drying and suction process of plastic materials are integrated. The dehumidifying and drying process of the materials are carried out in a fully enclosed low dew point of -40 degrees. The dehumidified plastic materials will never come into contact with the outside air. So as to achieve the most ideal demand in the market.
The concept of plastic dehumidifying dryer: the drying process of materials, firstly, the moisture on the surface of the material is vaporized by heating and removed by the vacuum equipment. The moisture on the surface of the material is gradually reduced due to vaporization, and a temperature difference is formed between the inside and the surface of the material. Under the action of the temperature difference, the internal water continuously diffuses to the surface and vaporizes after reaching the surface. In addition, in the vacuum drying process, there is a pressure difference at the same time, which makes the vaporized water molecules accelerate to move to the vacuum space.
In the vacuum drying process of plastic dehumidifying dryers, people always want to speed up the drying speed and shorten the drying time, but the factors affecting the drying speed are as follows: the higher the vacuum, the more conducive to the vaporization of moisture at a lower temperature, but the vacuum is Too high is not good for heat conduction and will affect the heating effect of the material. In order to increase the drying speed of materials, the vacuum degree should be considered comprehensively according to the characteristics of the materials.
Generally, the vacuum degree should not be less than 1×104Pa; the condition of the material to be dried (such as material shape, size, stacking method), the moisture content, density, viscosity and other properties of the material itself. Generally, if the material particles are fine and uniform, the pile is loose, and the thickness is thin, the internal moisture is easy to diffuse. If the initial temperature of the material is increased, the pretreatment by vacuum filtration, and the moisture content of the material is reduced, the vacuum drying speed can be increased.
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