Microwave heating and drying technology is an emerging drying technology with multiple advantages. As a very short electromagnetic wave with strong penetration, the microwave interacts with polar molecules in the material in a rapidly changing high-frequency electromagnetic field. The polar molecules absorb the microwave and generate a thermal effect. The microwave energy is directly converted into medium heat energy, and the microwave is After the object is absorbed, the object spontaneously generates heat, and the inside and outside of the object are simultaneously heated, and water evaporation occurs successively to achieve the purpose of drying.

Drying by microwave heating has many advantages:

1. Simple operation and large selectivity: The microwave drying equipment is ready to use, without the thermal inertia of conventional equipment, the operation is flexible and convenient, the microwave power is continuously adjustable, and it is easy to control. The circuit control system adopts bus control mode and PLC programming automation control mode, and can be equipped with advanced infrared remote control and pulse function, which is convenient and safe.

2, fast drying speed: conventional drying is the transfer of heat from the surface of the material to the inside through heat conduction, convection or radiation. Microwave heating is completely different from traditional conventional external heating and drying methods. It uses the heating material itself as a heating element, which is called internal heating mode. It does not require heat conduction, and it is heated internally and externally. Therefore, even a material having poor thermal conductivity can achieve a heating effect in a short time.

3, energy-saving and high efficiency: microwave heating and drying, microwave energy is only absorbed by the heating object itself to generate heat, the heating chamber wall and the heating chamber air and the corresponding container will not heat, so the thermal efficiency is extremely high, resulting in significant environmental improvement.

4, advanced technology: microwave equipment does not require boilers, complex piping systems, coal yards and transportation vehicles, etc., only basic conditions of water and electricity, no special requirements for the plant. Less investment and quick results.

5, heating and drying uniform: conventional heating and drying, in order to increase the heating speed, it is necessary to increase the heating temperature, easy to produce endogenous endogenous phenomenon. When microwave heating and drying, all parts of the material uniformly penetrate electromagnetic waves to generate heat, so the uniformity is greatly improved.

6. Compact equipment saves floor space: microwave equipment has no high temperature residual heat, does not generate heat radiation, can improve the working environment, and has compact structure and saves plant area.

7. Maintain the primary color of the material: Since microwave drying does not require heat conduction, the material itself generates heat and the drying speed is fast. The temperature of the contact material is much lower than the conventional method, and the material fission phenomenon is not caused.

8, safe and harmless: usually microwave energy refers to the transmission in the closed heating chamber and waveguide made of metal, microwave leakage in the inlet and outlet, observation window, furnace door, etc. is strictly controlled within the national safety indicators. It is a very safe heating and drying technology without polluting materials or polluting the environment.