Microwave Heating of Material Suitable for Drying in Food Industry

- May 07, 2019 -

Firstly, microwave drying technology suitable for drying materials with poor thermal conductivity or high viscous content

can produce good processing results for materials with poor thermal conductivity and viscous content in agricultural and sideline products and materials with original color and fragrance to the greatest extent. If a tea company bakes tea with microwave dryer and processes it into refined tea, the time needed is reduced to 1/5 of the conventional method, and the moisture content of tea is reduced to 3%. The original color and fragrance of tea are well maintained.

2. It is both dry and puffed. The product has good rehydration property

Because the moisture in the material is heated by microwave, it vaporizes sharply, forming and maintaining fine porous structure in the material, and obtaining good rehydration performance. It is especially suitable for corn, fruit and vegetable crisps, pork skin, oil-free instant noodles and soluble sugar added to coffee and milk tea. A sugar factory in Xinjiang has built several microwave baking lines for square sugar. The total output power of microwave is 160 kW, and the daily output of square sugar is 60 & mdash; 70 t, with an annual profit of 5 million yuan.

3. Aquatic products that need to be processed in closed environment for drying

such as roast fish fillets, laver or shrimp skins, which need to be cleaned in closed environment and do not mix with impurities and sediment, can be dried by microwave.

4. Konjac is a well-known health food which needs to keep its original color and luster dry < / P >

It has low calorific value, and has the effect of eliminating phlegm, dispersing knots and detumescence. It is exported to Western Europe and Japan. One of the important signs of product quality is whether the color of konjac flour can be kept white and clean after being processed into konjac flour

5. Drying of high-grade wood and bamboo products raw materials

wood and bamboo has poor thermal conductivity, long drying cycle and needs uniform drying, otherwise they will crack and flex. Compared with kiln drying, microwave drying wood has the advantages of uniform heating, short drying kitchen period, low operating intensity and continuous production.

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