Several Factors Affecting the Drying Speed of Double Cone Vacuum Dryer

In order to improve the drying speed of materials, double cone vacuum dryer should be based on the characteristics of the material to consider the vacuum. Typically, the degree of vacuum should not be less than 1 × 104Pa.
The concept of vacuum drying speed of the double cone vacuum dryer The drying process of the material is firstly the heat of the surface of the material and the vacuum is removed by the vacuum equipment. The moisture on the surface of the material is gradually reduced by vaporization and the temperature difference between the material and the surface is formed The The internal moisture in the role of temperature difference, continue to spread to the surface, and after the surface of the vaporization. In addition, in the vacuum drying process, there is a pressure difference, so that the vaporized water molecules to accelerate to the vacuum space. In the vacuum drying process of double cone vacuum dryer, people always want to speed up the drying speed, shorten the drying time, but the impact of drying speed factor 1 has the following:
(1) the condition of the dried material (such as material shape, size size, stacking method), the moisture content of the material itself, density, viscosity and other properties. In general, the material particles fine and uniform, stacked loose, the thickness of thin, the internal water is easy to spread. If the material to improve the initial temperature, vacuum filtration before treatment, reduce the moisture content of materials, etc., can improve the vacuum drying rate.
(2) double cone vacuum dryer the higher the vacuum, the more conducive to moisture in the lower temperature vaporization, but the vacuum is too high adverse heat conduction, will affect the heating effect of the material.