In developed countries, developed countries began to develop industrial microwave vacuum drying equipment in the 1980s, and achieved good results in practical applications. French International Microwave Company processed the seedless raisins with microwave vacuum drying equipment, and changed the traditional process to 65 ° C, 24 hours hot air drying to 50 ° C, 5 hours microwave vacuum drying, product quality and output were greatly improved. In the country, the company began to develop microwave vacuum equipment first, and through several years of efforts, completed the development of industrialized 10KW microwave vacuum drying equipment. It provides a new and efficient drying equipment for pharmaceutical engineering, bioengineering, chemical engineering, materials engineering and deep processing of agricultural and sideline products.
The following are some of the advantages of microwave vacuum drying equipment drying:
1. Efficient and conventional vacuum drying equipment is heated by steam. It needs to be heated from the inside to the outside. The heating speed is slow and it takes a lot of coal. The microwave vacuum drying equipment uses electromagnetic wave heating. It does not need heat transfer medium and is directly heated to Inside the object, the heating rate is fast, and the microwave energy of 1 kW can heat the water at normal temperature to 100 ° C in 3-5 minutes, which avoids the above disadvantages, so the speed is fast, the efficiency is high, the drying cycle is greatly shortened, and the energy consumption is reduced. Compared with conventional drying technology, it can improve work efficiency by more than four times.
2, heating evenly due to microwave heating, the material is heated simultaneously from the inside to the outside, the temperature difference between the inside and outside of the material is very small, does not produce the situation of internal and external heating inconsistent in the conventional heating, resulting in the effect of puffing, which is conducive to crushing, so that The quality of drying is greatly improved.
3, easy to control, easy to continuous production and automation, due to the rapid adjustment of microwave power and inertia, easy to control, you can adjust the temperature between 40 °C -100 °C.
4, the small size, easy installation and maintenance, do not occupy too large a venue.
5. Microwave vacuum drying equipment has good quality. Microwave vacuum drying equipment prolongs the shelf life of food, preserves the original flavor and nutrients of food, retains the physiological activity of raw materials, enhances the functionality of health food, and increases the added value of agricultural products. Compared with the conventional method, the quality of the processed product is greatly improved.
6, microwave vacuum drying equipment microwave has the effect of disinfection, sterilization, product safety and hygiene. The shelf life is long.
7. Microwave vacuum drying equipment has significant economic benefits. Conventional drying takes a long time, is very slow, consumes a lot of energy, and has high processing costs. Microwave heating saves a lot of energy and increases the speed of heating and drying. This is because the microwave is penetrating, does not require any media when heating the object, and can simultaneously heat the inside and outside of the material. According to domestic and foreign data, the use of microwave equipment to heat materials, its speed and efficiency is 4 to 20 times that of conventional heating methods.
From the above-mentioned characteristics, energy saving, consumption reduction, product quality improvement, safety and hygiene, and low equipment investment cost can be seen to show significant economic and social benefits. At present, the new industrialized microwave vacuum drying equipment has formed a series of products from 2KW-100KW microwave vacuum drying equipment. This will provide a modern high-tech drying equipment for many fields and scientific research departments of China's national economy.
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