General Knowledge for The Most Common Drying Material

General Drying Machine

It’s always difficult to maintain its taste when drying something without control. Just like there a ways you need to know on how to dry different kinds of material be precise on its moisture reduction to keep that sweetness.

There are many types of drying materials, and their process requirements are also different. Common types of materials include flowers and leaves, rhizomes, fruits, meat and poultry, aquatic products, industrial products, and so on. Removal of moisture is only the first step in material drying. More importantly, it is to ensure the quality of drying. Different materials require different drying processes.

Meat and poultry: inhibit bacteria, balance dehydration

Most of the meat and poultry materials have a large amount of dehydration, a large number of materials are dried, and they are easy to spoil. Therefore, the control points are to inhibit bacteria and balance dehydration. Typical materials include bacon, sausage, dried duck, cured chicken, etc. The common drying modes are static and tunnel. Take bacon as an example. In the early stage, the temperature needs to be raised quickly to ensure that the material will not deteriorate, but the temperature should not be too high during the drying process, otherwise, the grease will overflow quickly, and the color will become black under the action of high temperature, which will affect the appearance of the finished product. And quality.

Aquatic products: antibacterial, two-level differentiation

The drying of aquatic materials generally requires a relatively low temperature, such as sea cucumbers, abalones, shrimps, dried freshwater fish, etc. Generally, the drying cycle is relatively long to avoid high temperature affecting the quality of the products after drying, and the water content of aquatic products is generally relatively large. Therefore, controlling the moisture discharge is an important factor in determining the quality of drying. Keep the seafood after drying. Color. A larger circulating air volume is required, and the wind speed is relatively high to avoid water vapor staying on the surface of the material. The main point of control is to inhibit the growth of bacteria.

Mosaic: color fixation, humidity control

Mosaic materials usually have higher requirements for the appearance and quality of the finished product. Therefore, the control points are color fixation, humidity control, rapid dehydration, and humidity control, and lock the natural color of the material. Therefore, the temperature cannot be too high and the dehydration speed cannot be too fast. The materials include roses, chrysanthemums, dendrobium flowers, etc. The commonly used drying modes are static, belt, and circulating air methods are mostly advection or through flow. Specific process methods include curing, color fixation, ripening, and fragrance enhancement.

Roots: balance dehydration, body recuperation

Rhizome materials are usually thick and the moisture is not easy to remove. Therefore, the key point of control is to balance dehydration and retraction. While ensuring that the materials meet the drying requirements, ensure the quality and appearance of the materials. Typical materials include gastrodia elata, codonopsis, carrots, etc., commonly used drying The mode is static and tunnel. The circulating air method can be advection or through flow, which needs to be determined according to the internal structure and air duct of the drying room. The process methods include preheating, closing, quenching, and perspiration.

Fruits: Slowly dehydrated

Fruit materials include seeds, figs, persimmons, cherry tomatoes, etc. These materials usually have the characteristics of polysaccharides, strong heat sensitivity, and slow water output. Therefore, the temperature and humidity curve and time need to be strictly controlled, and the drying mode should not be rushed. There are static, tunnel, belt, advection or through-flow circulating wind methods can be adapted. The process methods include preheating, closing, and curing. Fruit materials need to pay special attention to the saccharification effect during the drying process. The temperature is too high, Excessive dehydration speed will cause the material to turn black. Seed drying requirements are even higher, to ensure the germination rate, do not try to do without accurately grasping the drying process.

Industrial: fast and efficient

Typical industrial materials include printing, electroplating, rubber, paper tubes, ceramics, etc. These materials generally need to be dried throughout the year, and the seasonality is not obvious, so the configuration of the drying unit should be able to meet the requirements of different working conditions throughout the year; Generally, the drying object is relatively single and fixed, and there is less need to consider the versatility of the drying object; it requires a high degree of operation automation, preferably fully automatic operation, the shape and form of different drying objects are very different, and some materials will contain strong corrosiveness. Therefore, there are special requirements for the selection of materials for the drying unit, such as anti-corrosion, and the control points are high temperature, fast, high efficiency, energy saving, and all-weather.

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