Priorities of Microwave Drying Machine
1. Fast processing
Microwave can reach into the interior of materials, not depending on the heat exchanges in the materials. Thereby it takes less time to finish the drying process than that by the conventional method.
2. High quality
In short drying time, the food can keep great look and taste. The destruction of vitamins in food will be reduced to the smallest extent. For materials with complicated shapes, better heating uniformity can be achieved compared to other drying methods.
3. Rapid respond
The conventional drying methods like electric heating, steaming heating and hot air, need to warm up gradually in a certain period. If there is some trouble with machines, it takes a longer period to lower the temperature. However, the microwave drying machine can operate smoothly for several minutes after starting. Adjusting the output power, the material heating can be accordingly changed.
4. Uniform heating
Unlike steam or electric heating that generate heat to warm food from the outside, the microwaves penetrate into food and create heat from within. So microwave heating can avoid hardening surface and uneven heating that caused by conventional heating.
5. High thermal efficiency
The microwave heating equipment will spend energy on the power section. But the microwave heating is the direct heating of food, unlike other heating ways which warm food by indirect heating through other materials.
Wide Application of Microwave Drying Machine
1. Grain drying and insect killing
Microwave drying machine can do grain drying and insect killing to keep grains in long storage. Microwave drying can replace hot air drying to avoid the damage made by the hot air. Microwave drying machine can work at the temperature of 20℃, and can completely kill insects like rice weevil, saw-toothed grain beetle and so on.
2. Seeds drying
Using the microwave to dry seeds. Under the appropriate irradiation power, the microwave drying can make seed to reach the certain temperature, which improves seeds’ germination rate and speed.
3. Cotton drying
Cotton bolls harvested in the rainy season generally contains high water content, so it is prone to be rotten or bad for fiber quality. Sun drying or other drying ways suffer the restrict of natural conditions. Moreover, the temperature of drying cannot be controlled to reach better drying effect.microwave drying brings fast and uniform drying to keep the fiber quality.
4. Wood drying
Generally, wood is dried naturally in the factory, or dried by heat indoor. Natural drying utilizes flowing air to take away the water on the wood surface. The evaporation is limited by water diffusion from wood center to the surface. The cork drying needs several weeks, and hardwood drying needs several years. To improve the diffusion rate, wood is dried indoors. Heating speed should be slow enough to keep drying balance between surface and the inner of wood. Due to bad heat conducting, it is difficult to dry the inner part of the wood. Microwave can penetrate into the wood and bring uniform heating to the wood. Dried by microwave drying machine, the drying time of wood is reduced from several months to several days or even couples of hours, and meanwhile, the drying quality is greatly enhanced.
5. Cigarette drying
Before packaging, cigarette should be dried by hot air for 2-6 hours to remove 1-3% of water content, so the water content of cigarette will reduce to 12% from 14%. But by microwave drying, under certain power, the water content will reduce by 2.7-3.2% in 40-60 seconds. Moreover, microwave drying is featured with uniform drying.
By the conventional drying ways, drying time is around 10-100mins based on different materials. By microwave, drying needs several minutes. Take the cigarette disinfection for example. Compare total microorganisms after microwave drying and room drying.
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Drying room
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4 hours
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240,000 bacteria count/g
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Microwave drying
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20 seconds
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105,000 bacteria count/g
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Microwave drying
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50 seconds
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81,000 bacteria count/g
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Microwave drying
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80 seconds
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13,000 bacteria count/g
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Microwave drying is the effective disinfection way, especially killing fungi, mold and etc.. By microwave, the interior of food can be dried fast, which greatly shortens the disinfection time. Our microwave drying machine is high quality with competitive price, if you are interested in the drying machine, please feel free to contact us!
