Vacuum pump has a wide range of applications in the vacuum drying process. Vacuum drying is a method of placing the material under negative pressure and appropriately heating to reach the boiling point under negative pressure or by cooling to solidify the material and then drying it through the melting point. The way the material is dried. The moisture content of the material in the material under the negative pressure state 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. Vacuum drying technology is also known as drying under reduced pressure. It is a method of removing air in a closed container and drying it under reduced pressure. Common vacuum drying equipments include vacuum drying ovens, continuous vacuum drying equipment, and the like.
Vacuum drying is a method of placing the material under vacuum under pressure to lower the boiling point of water. The boiling point of water at 100 ° C is 100 ° C. Under vacuum conditions, the boiling point of water can be lowered to 80 ° C, 60 ° C. At 40 ° C, evaporation begins to solve the drying process of heat sensitive materials.
The vacuum drying process is to place the dry material in a closed drying chamber, and vacuum the vacuum system to continuously heat the material to be dried, so that the moisture inside the material is poorly diffused to the surface by pressure difference or concentration, and water molecules are on the surface of the material. Obtaining sufficient kinetic energy to escape the low pressure space of the vacuum chamber after overcoming the mutual attraction between the molecules, thereby being pumped away by the vacuum pump. In the vacuum drying process, the pressure in the drying chamber is always lower than the atmospheric pressure, the number of gas molecules is small, the density is low, and the oxygen content is low, so that materials which are easily oxidized and deteriorated, and flammable and explosive dangerous goods can be dried. It can play a certain role in disinfecting and sterilizing pharmaceuticals, foods and biological products, which can reduce the chance of material contamination or inhibit the growth of certain bacteria.
Since the temperature of the water during vaporization is proportional to the vapor pressure, the moisture in the material can be vaporized at a low temperature during vacuum drying, and low temperature drying can be achieved. This is advantageous for the drying of heat sensitive materials in certain pharmaceuticals, foods and agricultural by-products.
2SK Liquid Ring Vacuum Pump
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