Vacuum dryer used in food and pharmaceutical industry
Vacuum dryer is an indispensable drying equipment in food and pharmaceutical fields
In industrial production, more and more materials need to be dried in the production process, and the drying process often affects the quality of finished products. In recent years, a lot of new drying equipment are emerging, among which vacuum dryer is an indispensable drying equipment in the field of food and pharmacy at this stage.
With the continuous progress of drying technology, there are more and more types of drying equipment, and more new drying technologies are emerging, among which vacuum drying technology is a new drying technology with high added value. Vacuum dryer also known as (vacuum oven, vacuum drying oven). Vacuum dryer is mainly used for dehydration and drying of high added value and heat sensitive agricultural and sideline products, food, medicinal materials, fruits and vegetables, chemical raw materials, etc.; it is used for low-temperature concentration of chemical products, removal of crystal water, drying of enzyme preparation, and vacuum extraction of Chinese herbal medicine, which is suitable for experiments in scientific research institutions. The vacuum dryer uses the principle of reducing the boiling point of water in materials under vacuum environment, which can realize the purpose of dehydration and drying of materials at lower temperature.
After the vacuum container is vacuumed, the inner part of the container is removed by air. During the drying process, the tank is in a vacuum state, and the jacket is heated by hot water (or steam or heat-conducting oil). With the low-speed rotation of the tank, the materials move continuously up and down, inside and outside in a "Diamond track" and absorb and evaporate. The water vapor is continuously discharged through the vacuum pipeline to achieve the purpose of material drying. At the same time of drying the mixture, according to the customer's requirements, built-in spray, filtration, crushing and other devices can realize its multi-functional operation.
Vacuum dryer is composed of vacuum box, frame, drying frame, heating system, vacuum system, solvent recovery system and electrical control system
The vacuum box is divided into inner tank, insulation layer, outer wall, door body, sealing parts, etc
The inner liner is made of 304 stainless steel plate with a thickness of 6-8mm, which is closely welded by DC argon arc welding machine, and then strengthened with No. 8 channel steel. After forming, the inner liner has great pressure strength to ensure no deformation of the box during vacuum operation. The insulation layer is filled with aluminum silicate insulation cotton, and the insulation layer is 80mm. The insulation performance of aluminum silicate insulation cotton is superior to rock wool, and there is no agglomeration, The temperature rise of oven surface is less than or equal to 15 ℃ when the oven is heated. The outer wall is made of 2mm stainless steel plate and welded by DC argon arc welding machine. The surface is matted. It is beautiful and convenient for online cleaning and sterilization of oven
The door body is formed by stamping at one time and equipped with double mirrors. The sealing parts are all made of special silicone rubber. The high temperature, high pressure resistance, flexible opening and closing make it easy to observe the drying condition of materials in the box
The frame is made of stainless steel plate, which is welded after forming to support the box body and convenient for workers to operate
The drying frame is welded with 2 mm thick stainless steel tube