Freeze dryer application range:
Food industry: Freeze dryers are often used for drying fruits and vegetables, meat and poultry, aquatic products, condiments, convenience foods and specialty products. Therefore, freeze dryers are also known as food freeze dryers to maintain the original color, aroma, taste and shape of food. The purpose of the freshness is unchanged, and the rehydration is good, the finished product is easy to store and transport, the cost is reduced, and the storage period is prolonged.
Medicinal health: in the drying of royal jelly, ginseng, turtles, cockroaches, cockroaches and other nutraceuticals, vacuum freeze-drying process, better preserve the original nutritional value, and make people believe that the nutritional products are pure and natural.
Pharmaceutical industry: used for dehydration and preservation of Chinese and Western medicines such as serum, plasma, vaccines, enzymes, antibiotics, and hormones.
Biological research: The long-term preservation of blood, bacteria, arteries, bones, skin, cornea, nerve tissue and various organs using vacuum freeze-drying technology can be regenerated only by supplying water during use, and still maintain its physical properties....
The pilot freeze dryer is mainly composed of control system, vacuum system, refrigeration system and circulation system: in addition to the above components, the medicinal pilot freeze dryer has hydraulic system, in-place cleaning system and in-situ sterilization system. The medicinal flash dryer is the key equipment in the production process of the aseptic freeze-dried preparation. Due to the particularity of the medicine, the relevant departments have clearly defined the material and performance of the pilot freeze dryer. Although the current pilot freeze dryer has met the production requirements, it still has the following shortcomings in terms of economic benefits, product quality, production operation, etc. The most important point is that the vacuum is too high, which is not conducive to product sublimation! During the freeze-drying process of the product, the degree of vacuum in the environment has a direct influence on the length of the freeze-drying cycle. If the degree of vacuum is too low, the sublimation rate will drop significantly; if the degree of vacuum is too high, the heat convection will be too poor, and the freeze-drying rate will be significantly reduced....
1. Shape processing and concentration adjustment of materials
For solid materials, if there is no excessive shape requirement, the heat transfer mass transfer area can be increased by cutting treatment, thereby speeding up the freeze-drying rate and reducing the freeze-drying time; if the shape of the material is high, cutting is not allowed, and puncture can be taken. The treatment is to facilitate the escape of water vapor inside the material, and the lyophilization rate is enhanced by strengthening the mass transfer process....
With the continuous improvement of living standards, people will put forward higher requirements for the quality of consumer products, environmental protection awareness, health awareness is further strengthened, and the demand for various types of drugs, health products and freeze-dried foods will increase. In order to meet the needs of various pharmaceuticals, bio-health products, freeze-dried foods and solid micro-powder preparations, especially the development of bio-engineering, it will bring about a new upsurge in the development of new drugs and bio-pharmaceuticals, all of which will effectively promote the experiment. The further development of the freeze dryer technology in the room has resulted in the continuous expansion of the application scale and the continuous expansion of application fields....
The food freeze-drying machine consists of a refrigeration system, a vacuum system, a heating system, and an electrical instrument control system. The main components of the food freeze-dryer are drying oven, condenser, freezing unit, vacuum pump, heating/cooling device and so on. The principle of the food freeze dryer is to freeze the items to be dried to below the triple point temperature, and then vacuum the solid water (ice) in the items to directly sublimate into water vapor, remove from the items, make the items dry. After the material is pre-treated, it is sent to a quick-freezing chamber for freezing, then sent to a drying warehouse for sublimation and dehydration, and then packaged in a post-processing workshop. The vacuum system establishes a low pressure condition for the sublimation drying chamber, the heating system provides the sublimation latent heat to the material, and the refrigeration system provides the required coldness to the cold trap and the drying chamber. The equipment adopts high-efficiency radiant heating, the material is heated evenly, adopts high-efficiency catching cold trap, and can achieve rapid defrosting; adopts high-efficiency vacuum unit and can realize oil-water separation; adopts parallel centralized refrigeration system, multi-channel on-demand cooling, working conditions Stable and energy-saving; artificial intelligence control, high control accuracy, easy operation....
