Dzgw Food Factory Drying Ripening Sterilization Microwave Machine for Cereals Grain Crops Beans Nut

Microwave sterilization is a new drying sterilization method, a large number of experiments and data show that microwave drying is the fastest drying sterilization method. Microwave dryer has a very wide range of applications, especially suitable for food, medicine, meat and other powder, granular and semi-liquid materials drying, while in the drying process, but also has the role of sterilization, so that the dried product to maintain the original nutritional composition and traditional flavor.

The microwave drying sterilizer does not need to be equipped with a heat source because the microwave energy directly acts on the medium molecules to convert into heat energy. Microwave penetration allows the material to be heated both internally and externally without the need for a heat conduction process. It has the advantages of fast drying speed, uniform drying, convenient access, no pollution and so on.

Sterilization principle:
Microwave electromagnetic waves with frequencies from 300 MHz to 300 GHz. The water in the heated dielectric material is a polar molecule. Under the action of the rapid change of electromagnetic field, its polar orientation will change with the rapid change of external electric field, thus causing the movement and friction of molecules. The energy of the microwave field is converted into heat energy in the medium, so that the temperature of the material rises, and a series of physical and chemical processes such as heat and expansion are generated after the material is heated, so as to realize microwave heating.

Advantages
1. Any material can be dried at 18ºC to 80ºC.
2. Low energy consumption to 1.2KW /h, reduce power consumption by more than 75%
3. Microwave drying time is short, the speed is fast, generally 3~4 minutes to complete, greatly saving the drying time.
4. Tunnel design, small footprint, fast drying and sterilization, continuous production

The whole microwave sterilization equipment consists of transmission system, microwave heating system, intelligent control and detection system, cooling and dehumidification system, etc.

Transmission system: the material is transferred by 500mm conveyor belt. The conveyor belt is composed of ptfe with guide rod, which does not deviate and is not flammable. Transmission speed can be adjusted by frequency converter, ranging from 1 m to 6 m per minute.

Control and detection system: Central control system: the microwave switch of the microwave dryer is manually operated and has normal protection function. It cannot be opened if the program runs abnormally, which can prevent microwave leakage caused by misoperation. The control panel adopts PLC automatic control system, which can monitor the working status of each magnetron for troubleshooting in time. Each set of magnetron circuits work independently. Even if one group has a problem, the rest can continue to work normally without affecting the use, pending later maintenance.

Detection system: the side of the drying box is equipped with four-room observation window and color LCD TV monitoring facilities, which can directly observe the operation of materials. Microwave suppressors are installed at both the feed and discharge ends to prevent microleakage. The discharging end of the heating box also has a set of infrared radiation thermometers. Infrared probe can measure temperature range :(0~300ºC), can reflect the instant temperature of the material heated by microwave cavity. Temperature adjustable, control accuracy ±5ºC.

Cooling dehumidification system: the top of the heating box is equipped with a dehumidification mouth to remove water vapor in time. The dehumidification fan is an environment-friendly low-noise centrifugal fan, which can ensure no obvious water vapor retention above the cavity. The exhaust pipe is PVC anticorrosive pipe with diameter of 200mm.

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