Application Of Vacuum Pump In Wood Drying

In various heating and drying methods under normal pressure, the color, aroma, taste and nutrients of the material are subject to a certain degree of loss due to the heat of the material. If the method of vacuum drying is used, the loss of quality can be reduced by the fact that the air is isolated under a negative pressure state, and a material which is susceptible to chemical changes such as oxidation during the drying process can better maintain the original characteristics. Vacuum drying is to place the dried food material in a closed drying chamber. While vacuuming with a vacuum system, the material to be dried is heated appropriately, so that the moisture inside the material diffuses to the surface through pressure difference or concentration difference. Sufficient kinetic energy is obtained on the surface of the material, and after overcoming the attraction between the molecules, it escapes into the low-pressure air of the vacuum chamber and is removed by the vacuum pump.

Vacuum drying, also known as analytical drying, is a drying method in which the material is placed under a vacuum condition, and the boiling point under a negative pressure state is appropriately heated or the material is solidified and then dried by a melting point by cooling. Vacuum drying technology has been widely used in the production of health foods, especially the extraction of natural product extracts, which are widely used for vacuum drying because many of the functional ingredients in natural products are not resistant to high temperatures. Vacuum drying technology, also known as vacuum drying, is a method of removing air in a closed container and drying it under reduced pressure.

Under the negative pressure state, the boiling point of the melting point decreases with the increase of the vacuum degree. At the same time, the vacuum pump gap is used to reduce the water vapor content, so that the water and other solutions in the material can get enough kinetic energy to leave the surface of the material. Vacuum drying Because the air is isolated under the negative pressure condition, the chemically changed materials which are easily oxidized during the drying process can better maintain the original characteristics, and the material can be better protected by vacuuming after injecting the inert gas.