In the pharmaceutical industry, drying boxes are essential equipment. According to the dry matter, the drying box can be divided into two categories: electrothermal air drying oven and vacuum drying box. The vacuum drying box is designed for drying heat sensitive, easily decomposing and oxidizing substances. It is widely used in the fields of Biochemistry, chemical pharmaceutical, medical and health, agricultural scientific research, environmental protection and so on. It is used for powder drying, baking, and disinfection and sterilization of various kinds of glass containers. Especially suitable for drying heat sensitive, easy decomposition, easy to oxidize substances and complex components of goods for rapid and efficient drying.
 
  The vacuum drying box appears earlier in our country. It is an ancient drying device. The principle is that the drying box is layered with heating plate. The heating plate is filled with hot water or low pressure steam as a medium. Then, the drying plate is placed on the dry board, the box door is closed, the box is pumped out with the vacuum pump, and the air is pumped out with the vacuum pump to form the air. Vacuum environment. The heating plate heats the medicine to a specified temperature in the circulating flow of the heating medium, and the moisture begins to evaporate and gradually evaporate with the vacuum pumping. The drying equipment is easy to control, and the medicine is not easy to be polluted during drying. It is suitable for drying and packing materials.
  Since the reform and opening up, the state has provided convenient conditions for activating the promotion of national economic construction and increasing the development of free circulation of industrial products. It shows the rapid development of many private enterprises and private enterprises, which is characterized by market economy. Many drying equipment enterprises on the original basis of foreign drying oven, dryer production experience, copy and innovation of vacuum drying equipment.
 
  In the 80s of last century, the bulk drug industry used the vacuum drying box as the main dryer, but because it was not easy to clean and sterilize the material on line, the drying speed was slow, the labor intensity of the workers was great, and the drug homogenization was realized. After drying, the mixing device was also used. Used for medium or small test production or package heat treatment life force air compressor parts.
 
  Nowadays, the development and production level of the vacuum drying box in our country has been greatly improved, the design is more and more reasonable, the quality is improved, the cost is gradually reduced, the degree of automation and after service are all improved. The users of vacuum drying equipment have been increasing rapidly in recent years. It is mainly used for large production in batch production. It is suitable for the drying of granular materials with good air permeability. The product is dry and uniform. It is widely used in the industry of vitamin C and penicillin in China. However, due to the relatively poor relative tightness of the equipment, the on-line cleaning and on-line sterilization can not be well arranged, so it is suitable for the drying of non aseptic materials and medicinal intermediates.
 
  With the rapid development of the pharmaceutical industry, the pharmaceutical machinery industry also needs to keep pace with it. With the continuous improvement of GMP standard in our country, the pharmaceutical industry requires more and more drying equipment, such as meeting the requirements of high efficiency, energy saving, environmental protection and so on. Under this background, drying equipment enterprises are facing great opportunities and challenges. Although after more than 20 years, the technological progress of vacuum drying in China is not small, but how to ensure the internal quality of the equipment to keep the internal quality of the dry material, and to realize the on-line cleaning and on-line sterilization, will be a difficult problem to be solved in the drying equipment enterprises. At the beginning of the new year, what the pharmaceutical industry needs to do is to focus on the industry policy and standards, based on the trend of the market, conform to the trend of the development of the times, set up new goals, and roll up the sleeves.