Vacuum drying has many advantages: low oxygen content when drying under low pressure, can prevent oxidation and spoilage of dry materials, can dry flammable and explosive dangerous goods, can vaporize the water in the material at low temperature, easy to dry thermal sensitive materials, can recover valuable and useful ingredients in dry materials, can prevent the discharge of toxic and harmful substances in dry materials, can become an environmentally friendly type of "green" drying. Therefore, the application of vacuum drying equipment is more and more extensive.
The main drawback of vacuum drying is the need for a vacuum system that can pump water vapour, resulting in high investment costs and high operating costs of equipment, low production efficiency of equipment and small output. In order to overcome these shortcomings, many scientific and technological workers, has made a lot of efforts. At the same time, due to vacuum drying has many advantages, some products have to use vacuum drying equipment.
Therefore, the development of vacuum drying equipment will be very promising.