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Common types of drying ovens

The use of drying ovens has been around for hundreds of years, and today it has not only been used to dry goods, but also to provide some of the temperature environment required for experiments. With the development of technology productivity technology, more and more drying equipment has emerged, such as blast drying oven, vacuum drying oven, constant temperature and humidity chamber, industrial oven, baking room, tunnel furnace and so on. Manually controllable heat sources and mechanical ventilation dehumidification methods have gradually replaced the old methods, and the outstanding performance of the drying ovens has become increasingly apparent. Therefore, the drying oven is widely used in various industries. Below I will introduce you the common types of drying ovens.

Vacuum drying oven

Vacuum drying oven

  1. Vacuum drying oven: It has a long history and is designed for drying heat sensitive, easily decomposable and easily oxidizable substances. The hollow box is divided into several layers by a hollow heating plate. A hot plate or a low-pressure steam is introduced into the heating plate as a heating medium, and the tray on which the articles to be dried are placed is placed on the hot plate. The door is closed and the vacuum is pumped in the box. The heating plate heats the item to the specified temperature, the water evaporates and is gradually withdrawn by the vacuum. The device is easy to control, can condense and recover the evaporated solvent, and the experimental items are not easily contaminated during the drying process. Vacuum drying ovens are commonly used in pharmaceutical drying, packaging sterilization and heat treatment.

    electric blast drying oven

    electric blast drying oven

  1. The electric blast drying oven is subjected to an air circulation drying test by electric heating. The hot air is blown by the circulating fan to form a convection in the tank, thereby ensuring the temperature balance in the tank and allowing the articles to be quickly dried. Electric blast drying ovens are widely used in chemical, pharmaceutical, casting, automotive, food, machinery and other industries. It has a fast heating rate and high uniformity and is suitable for most industries.

    freeze-drying box

    freeze-drying box

  1. The freeze-drying box freezes the solid matter into a solid state, and then directly sublimes the water from the solid state into a gaseous state to achieve the purpose of drying. The lyophilization method is carried out substantially below 0 ° C, that is, in a state where the product is frozen, and the product is allowed to rise to a temperature of 0 ° C or higher, but generally does not exceed 40 ° Under vacuum conditions, when the water vapor is directly sublimated, the drug remains in the frozen ice shelf, forming a sponge-like porous structure, so that the volume after drying is almost constant, and more drug can be retained. When used again, add water and bubbles to restore the original shape. This method is costly and only applies to high value-added food industries or pharmaceutical medical applications such as antibiotics, vaccines, blood products, enzyme hormones and other biological tissues.
  1. Far-infrared drying oven: Far-infrared components can radiate far infrared rays of 2-15 microns or more after being heated. When it is absorbed by the heated object, it can be directly converted into heat energy, thereby obtaining the effect of rapid drying, shortening the production cycle, saving energy, improving product quality and the like. This method is fast, consumes less energy, and has precise control, which is suitable for places with high requirements.
  1. Vacuum microwave drying oven: During operation, microwaves are first generated by the microwave generator and input into the microwave heater via the energy feeding device. The material is sent to the heater by the transmission system. At this time, the moisture in the material is heated and evaporated under the action of microwave energy, and the water vapor is removed by the dehumidification system to achieve the purpose of drying. The bacteria in the material are killed by the biological and thermal effects produced by the microwave electromagnetic field. Since the microwave acts directly on the material, the drying temperature is low, the speed is fast, and the loss of the active ingredient in the drug is small. The drying speed is extremely fast, which can greatly improve the quality of the product. It has the characteristics of high efficiency, uniform heating, easy control, convenient installation and maintenance.

The above mentioned text is a brief introduction to common types of drying ovens. If you want to know more the drying oven, please contact with henan lanphan. Henan lanphan is a qualified company, which boasts high reputation both home and board. we are dedicated to the manufacture of laboratory equipment and pipe fittings, which has the good quality and price. If you want to know more about this, please contact with henan lanphan. We are willing to provide you as much information as possible. Our email address is the [email protected]

 

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