Guide: Microwave ovens are not unfamiliar to everyone. It uses the energy characteristics of microwaves to heat objects. In addition, the drying and sterilization of the food industry also have corresponding microwave equipment. Enterprises use microwave technology to produce the advantages of uniform heating, fast speed and low production cost. At present, there is still a certain gap between the development and utilization of microwaves in China compared with foreign countries, especially in the field of food processing, and there is still much room for development.
Box rice microwave heating
Microwave technology is widely used in radar, navigation, multi-channel communication, remote sensing and television. Beginning in the 1960s, microwave heating technology was gradually applied to physical processing such as paper, wood, and resin extrusion. In recent years, the introduction of microwave heating technology in the production process of microwave molybdenum industry not only can effectively improve the reaction conversion rate and selectivity, but also reflect many advantages such as energy saving and environmental protection. It has been widely recognized as one of the means to realize green technology. In the 1970s, China began to study microwave energy applications. In 1973, it began research on microwave heating equipment application technology and the development of magnetron tubes for microwave heating.
Microwave drying efficiency is high .
Compared with the traditional heating method, microwave heating has the characteristics of fast heating speed, small heat loss and convenient operation. It can shorten process time, increase productivity, reduce costs, and improve product quality. Therefore, it is often used in the food industry, such as microwave drying equipment, the production capacity is 3-4 times that of traditional dryers. For the agricultural and sideline products, the materials with poor thermal conductivity, high viscosity, and materials that need to maintain the original color and fragrance as much as possible can exert good effects by microwave heating treatment. The tea in Anhui Province uses microwave to bake tea and process it into refined tea. The time required for the tea is shortened by 1/5 compared with the conventional processing method, and the water content of the tea is reduced to 3%. Zui retains the original color and tea fragrance of the tea. In addition, Nestlé France used the microwave vacuum dryer to reduce the moisture content of concentrated juice from 20% to 3% as early as 1972. It successfully produced microporous powdered instant juice powder, and its color, aroma and nutrients remained almost unchanged. .
The microwave refrigeration loss rate is low.
Deeply frozen materials need to be thawed back to temperature before they can be processed. Microwave thawing has the advantages of short thawing time, no dripping of frozen products, low loss rate of flavor and freshness, and no pollution treatment. Therefore, food manufacturers often use it to thaw large frozen raw materials. As early as 1993, a military production plant in China had built a frozen pig microwave heating and thawing production line with an energy of 10 to 15 tons per day. 　
Microwave sterilization quality rod.
In addition, the application of food microwave sterilization and preservation is also more common. This applies to the thermal and non-thermal effects of microwaves. It retains more active substances than conventional sterilization methods and is very suitable for drying and sterilizing ginseng, shiitake mushrooms, pollen, gastrodia and other traditional Chinese medicines and proprietary Chinese medicines. Disinfection of liquid substances, such as microwave milk sterilizers, not only meets the requirements of the number of colonies, but also improves the stability of milk. The enzyme-free preservation of the product can overcome the loss of a large amount of water-soluble nutrients in the boiling method. Such as the killing process in the tea manufacturing process. Microwave baking tastes good. In foreign countries, microwave popcorn, microwave pizza ... microwave foods are available in a wide variety and can be bought anywhere, microwave heating, puffing equipment is a must for many street food stores. Using food microwave baking and baking, the internal moisture of the material rapidly vaporizes and migrates outward, forming numerous tiny pores, which makes the product structure fluffy. The nutritional value of the products baked in this way is higher than that of the conventional method, and the production time can be reduced and the taste is better. 　
Microwave puffing is healthier.
Microwave puffing utilizes the internal heating characteristics of microwaves, so that the interior of the material is heated rapidly to generate a large amount of steam, and the steam is flushed out to form numerous micro-holes, which make the material structure expand and loose. Compared with the frying and drying type of puffing, this does not destroy the original components of the material, and is easy to deteriorate and low in heat.
In summary, microwave technology is widely used in the food industry, and has the characteristics of high efficiency, environmental protection, health, and low loss. However, the shortcomings of some large-scale microwave equipments with large investment and large power consumption should also attract the attention of manufacturers. The presence of microwaves in the food industry, ranging from microwave ovens to microwave sterilizers and microwave dryers, contribute to the development of the food industry. We can, we need modern food processing technology with many advantages such as microwave, but we believe that its contribution to the food industry is far from this. It also needs related machinery companies to break through the technology and develop new functions of microwave food processing equipment.
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