There is no better drying method in the laboratory, and only one is the most suitable. No matter which kind of drying method has its unique value, it has its place to show its vitality.
First, vacuum drying oven
principle:
Designed for heat-sensitive, easily decomposable and oxidizable materials and complex components, the vacuum oven can be filled with inert gas, especially for complex ingredients.
application:
It is used in research and application fields such as biochemistry, chemical pharmacy, medical and health, agricultural research, environmental protection, etc., for powder drying, baking and disinfection and sterilization of various glass containers. It is especially suitable for fast and efficient drying of heat sensitive, easily decomposable, oxidizable substances and complex ingredients.
structure:
The vacuum drying oven is an older drying device, and the heating plate in the box is divided into several layers. Hot water or low-pressure steam is used as a heating medium in the heating plate, and the tray on which the medicine to be dried is placed is placed on the heating plate, the door is closed, and the vacuum is pumped in the box. The heating plate heats the drug to a specified temperature in the circulating flow of the heating medium, and the moisture begins to evaporate and is gradually withdrawn by vacuuming.
advantage:
1. This equipment is easy to control, can condense and recover the evaporated solvent, and the drug is not easily polluted during the drying process. It can be used in drug drying, packaging sterilization and heat treatment.
2, not only can dry the sample, but also provide the environment required for the experiment.
Use: Need to be equipped with a vacuum pump.
Second, the blast drying oven
principle:
The main feature of the blast drying box is the blasting, which is connected to the outside air. The blasting fan circulates the air in the drying box horizontally, so that the air in the box is blown onto the electric heater, heated and sent to the working chamber, and then inhaled by the working chamber. The fan is then blown to the electric heating tube for heating, and the temperature in the tank is more uniform while continuously circulating and heating. The hot air in the studio heats the wet sample, and the moisture is mixed into the hot air by heating.
application:
It is used for baking chemical gas and food processing to be baked goods, ink curing, paint film drying, etc., widely used in electronics, motors, communications, electroplating, plastics, hardware chemicals, instruments, printing, pharmaceutical, PC Precision baking, drying, tempering, preheating, shaping, processing, etc. of plates, powders, spray coatings, glass, wood building materials, etc.;
Structure: blast drying oven table and vertical division.
1. The vertical blast drying box adopts a rectangular parallelepiped floor structure, which is generally placed directly on the test room floor. The test instrument is generally on the upper side of the drying box for easy operation. The vertical vertical forced convection makes the temperature in the working room uniform, because the structure of the air duct is special, the fan is at the bottom of the box, and the natural air convection.
2. The desktop blast drying box adopts a horizontal box structure, the instrument is on the right side of the box, and the box is small and convenient for test movement.
Advantages: Because the structure of the air duct is special, the fan is at the bottom of the box, and natural air convection.
Use: Connect directly to the power supply and you can use it.
Third, spray dryer
principle:
The spray drying technology is to atomize the liquid material into fine mist droplets through a nozzle to obtain a large specific surface area. After entering the thermal field flowing in the drying tower, the mist droplets are immediately dried and separated into powders. process.
The feed may be a flowable liquid such as a solution, an emulsion, a suspension, a paste, a colloidal liquid or the like.
application:
Spray drying technology is the fastest growing and widely used drying method in the field of drying. It is widely used in the pharmaceutical industry, food industry, chemical industry, dairy industry, building materials industry, dye industry, and so on.
Structure: It consists of main engine heater, drying tower, cyclone collector, receiving bottle and air guiding device.
Advantages: Fast efficiency, the sample can be dried in 1~1.5 seconds, and the collected samples are uniform particles. Easy to store, transport, research and use.
Use: Need to configure the compressor to provide air supply.
Shaanxi Kang New Pharmaceutical co., Ltd. , https://www.bio-pharmacies.com