The vacuum dryer main models are the following:
Double Cone Rotary Vacuum Dryer: double cone rotating vacuum dryer suitable for chemical, pharmaceutical, food and other industries concentrated powder, granular and fibrous materials, mixing, drying and require low temperature dry material (such as biochemical products, etc. ), is more suitable for the easily oxidized, volatile, the drying of heat-sensitive strong stimulus, toxic materials, and does not allow the destruction of the crystal material. Belt / chain two elastic coupling, and thus the equipment running smoothly. Specially designed craft, fully embodies the two axes of good concentricity, the HTM and vacuum systems are used reliable mechanical seal or rotary joint. The machine can be variable speed, but also thermostatic control. The heat transfer medium from the high temperature thermal oil, the temperature steam and low temperature hot water readily available. Drying viscous material in the tank for you specially designed "copy board structure.
2 Low belt type continuous vacuum dryer: low temperature with continuous vacuum dryer is in conventional spray drying and freeze-drying of the advantages and disadvantages of repeated comparisons developed after the success of a new concept of energy-efficient drying equipment. In Chinese medicine, Western medicine, chemical industry, food, health care products and other products of the industry drying, spray drying is conducive to the cost of larger defects, but the product of solubility. Flavor and shape of the powder viscosity slightly higher and heat-sensitive the product is powerless. Conventional freeze-drying can be obtained the excellent solubility of the products and high quality products, but the yield is too low, and the cost is expensive.
3 rake vacuum dryer: vacuum rake dryer is a conduction heat transfer dryer. The material does not directly contact with the heating medium, suitable for drying a small amount, not high temperatures and are easily oxidized, pulpy, paste materials, the water content was 15% to 90%. Desiccator level harrow agitator blade is made from cast iron or steel, is mounted in the square shaft, left half of the blade direction, and the other half to the right. The rotational speed of the shaft for 7 ~ 8r/min, and it is the gearbox motor driven by the belt. While using the automatic steering apparatus, so that the direction of rotation of the shaft, once the rotating direction of the stirrer was changed at every 5 ~ 8min.
4 plate vacuum dryer: plate vacuum dryer, also known as disc vacuum dryer, intermittent stirring conduction dryer, integrated series of advanced technologies, through continuous improvement and developed a multi-layer fixed hollow heated disk (also known as set out trays), turn rake mixing, drying device for vertical continuous conduction dominated.
Vacuum dryer and low temperature drying, less active ingredients destruction, loose and easy to melt absorption, dried and sterilized at the same time the advantages so as to ensure that the active ingredients of the product, high aseptic indicators, oral absorption. Therefore, as compared with current conventional oven drying method, spray drying method or the like, vacuum continuous drying method has many unique advantages, can guarantee the product quality is much higher than the product of the use of other drying methods.
Vacuum dryer vacuum continuous drying method has the following main characteristics: low temperature dried in a vacuum environment, reduce the boiling point of water, low-temperature drying can be achieved, provided favorable conditions for the drying of heat-sensitive materials can be used to avoid the product active ingredients in the drying process in heat damage. Natural extract products such as the production of the product in the entire drying process in a vacuum, closed environment, the the mild drying process (temperature 40 ° to 60 ℃) can maintain its active ingredients. Under a vacuum environment of the differentiation of the anaerobic, the oxygen partial pressure is reduced, to avoid oxidative deterioration phenomena of the material during the drying process, and protect the quality of the product to be dried. Loose micropores in a high vacuum state, the product after a period of time to gradually dried, the structure from the microscopic point of view within the micropores, and directly pulverized to a desired particle size, the fluidity of the particles is very good. Meanwhile, the microscopic structure of loose particles instant excellent, more conducive to human absorption. Synchronization sterilization in vacuum hypoxia, can effectively inhibit the reproduction of bacteria, to achieve the purpose of killing bacteria. In the dried product at the same time, can be again achieved the sterilization function. Double sterilization to ensure a sterile product compliance.
Six characteristics of the circular vacuum dryer
1 under vacuum to the boiling point of the material solution was reduced so that the evaporator heat transfer driving force increases, and therefore a certain amount of heat transfer can save the heat transfer area of ??the evaporator:
Evaporation operation of the heat source using low pressure steam or waste heat steam; (water or oil heating customers' special requirements, the factory is specially designed for you.)
3 reduce the heat loss of the evaporator;
4 apply to easily decomposed at high temperatures, polymerization and metamorphic drying heat sensitive materials;
5 prior to drying can be disinfected, the any impurities no mixed during the drying process;
6. Belongs to the static vacuum drying, it dry material body is not damaged. |
Types and structural characteristics of the vacuum dryer resolution