The tunnel type microwave equipment uses the heated material itself as a heating element. The microwave curing baking effect can be instantaneously penetrated into the material interior, so that the inside and outside of the material are simultaneously heated, and no heat conduction is required, so the temperature rise is extremely fast, and the heating time is greatly shortened. The time required is generally about 1/4 of the conventional method. Soybean microwave curing baking equipment also has the function of insecticidal and bactericidal, microwave sterilization mechanism mainly includes thermal effect theory and non-thermal effect theory. According to the theory of thermal effect, microwave has high-frequency characteristics. When it penetrates the medium, polar molecules such as water, protein and nucleic acid are oriented and moved by the action of alternating electric field, and friction generates heat, which leads to temperature increase and microbial protein. The nucleic acid molecule is modified or inactivated to kill the microorganism. The non-thermal effect theory mainly includes cell membrane ion channel model and protein denaturation model. The former believes that the biological response of microwave to bacteria is that the microwave electric field changes the electron distribution of the cell membrane section , affecting the electron and ion concentration around the cell membrane, thereby changing the permeability of the cell membrane. The bacteria can not be normally metabolized, the bacterial structure is dysfunctional, and the growth and development are inhibited. . The latter believes that polar proteins such as proteins, nucleic acid substances and water in microorganisms cause the rotation or vibration of protein clusters in the microwave field of high frequency and strong electric field with the change of microwave polarity, which denatures the protein molecules. Thereby achieving the purpose of sterilization.
Main features of tunnel microwave equipment:
The microwave is an electromagnetic wave with a frequency of 300 MHz. The water molecules in the heated medium material are polar molecules. Under the action of rapidly changing high-frequency electromagnetic fields, its polar orientation will change with the change of external electric field, causing molecular motion and mutual friction effects. At this time, the field energy of the microwave field is converted into thermal energy in the medium, so that the temperature of the material is increased, and a series of physical and chemical processes such as heating and expansion are generated to achieve the purpose of microwave heating and drying.
Microwave sterilization features:
Low temperature sterilization maintains nutrients and traditional flavor. Microwave can penetrate the inside of the material at a frequency of 2450MHz, oscillating 2.45 billion times per second, killing bacteria through special thermal and non-thermal effects, compared with conventional thermal sterilization. Low temperatures and short periods of time provide the desired disinfection effect. Practice has proved that E. coli can be completely killed at 70 ° C. The total number of bacteria is greatly reduced at 80-90 ° C, and the time is only 2 to 3 minutes. Fast, short time, so retain the nutrients and traditional flavor of the food.
Microwave drying features:
1. The drying time is short, and the product has a strong aroma;
2. The drying temperature is low and uniform, and the color of the product is bright;
3. Selective heating. Since the water molecules are good for microwave absorption, the portion with a high water content absorbs more microwave power than the portion with lower water content. This is the characteristic of selective heating, which can be used to achieve uniform heating and uniform drying;
4. Dry and dehydrated water vapor direction from inside to outside. Therefore, microwave drying has a puffing effect, which is helpful for subsequent pulverization;
5. Energy saving and efficient. The microwave directly acts on the material, so there is no additional heat loss, the air in the furnace and the corresponding container will not heat, so the thermal efficiency is extremely high, the production environment is also obviously improved, and the electricity can be saved by 30% compared with the far infrared heating. .
6. Easy to control and advanced technology. Compared with the conventional method, the device is ready to use; without thermal inertia, the operation is flexible and convenient; the microwave power is adjustable. In microwave heating, drying, no waste water, no waste gas, is a safe and harmless high-tech. Improve product quality and bring economic benefits!
Puyang Linshi Medical Supplies Co., Ltd. , https://www.linshimedicals.com