Spices microwave technology principle
     Is a wavelength of the microwave in the 1 ~ lO00mm, a frequency of 3 X 10s ~ 3 X 10nI-Iz between the electromagnetic wave frequency electromagnetic field can be generated . Microwave in the food industry is the most widely used heating , microwave drying , microwave sterilization , microwave extraction and microwave heating mechanisms are relevant . Microwave heating mechanism includes two aspects:
    ( 1 ) polar molecular mechanisms . There is a polar molecule dipole moments , when they are in a static field , the molecular dipoles are arranged there was directional trend that end toward the positively charged anode, the negatively charged end toward the positive electrode . When the electromagnetic field direction changes, the dipoles also changed, molecules swing. When the microwave frequency is high, such as 2450MHz, namely a change in the electric field within seconds 2.45 × 109 times , polar molecules also will be 2.45 × 109 times swing. The thermal motion of the molecule and the interaction between adjacent molecules , obstruction and interference with the electric field oscillating elements have a similar effect of friction , and the molecules get energy manifested in the form of heat .
    ( 2 ) ionic mechanism. Water-soluble salt in foods , such as sodium ions have a positive effect with the electric field , the electric field moves the counter electrode area , the collapse of the hydrogen bonding generate additional heat. Meanwhile , ions accelerated by an electric field adjacent ions "internal collisions ", and its kinetic energy is transmitted to the collision ions , so that movement is more intense , a lot of heat , so that the microwave energy into heat .
    The most prominent feature of microwave technology is faster than traditional techniques , situ heat, transient warming. A penetration of the microwave , the material for processing, the material surface and internal action by both whole uniform , no extremes ; Because microwave direct effect on the material , and the device does not exist on the environment heat losses, the additional energy loss of small , high thermal efficiency , generally larger than the conventional method 3o% a 50% saving . Microwave equipment ready to use , no preheating, no heat , flexible operation , easy to control , easy to achieve production automation and continuous, clean pollution ; and reducing conventional boilers, pipelines and ancillary equipment including boiler room and energy storage investment and land, the same scale investment in microwave equipment can save about 50 % or more, can significantly reduce the cost of investment .