The microwave five-grain baking equipment takes the heated material itself as a heating element, and the microwave baking can instantly penetrate into the material, so that both the inside and outside of the material are heated at the same time, without the process of heat conduction, so the temperature rise is extremely fast, which greatly shortens the heating time, and the required time is generally about 1/4 of that of the conventional method. Baking, like other food processing, is a complex physical and chemical system, which needs to occur in an orderly manner and has suitable time/temperature conditions. Rapid microwave heating will cause breakage and excessive swelling of baked products. The microwave heating speed is fast, and the temperature of gas (air) inside the material rises sharply. Because of the slow mass transfer speed, the heated gas is in a highly compressed state, but it tends to expand. When it reaches a certain pressure, the material will expand.
The microwave baking insecticidal equipment has automatic temperature control system, automatic microwave density control system, automatic alarm system, video monitoring system, automatic deviation correction system of transmission belt, transmission frequency control system, material control system and PLC control system. The equipment has the advantages of flow production, simple operation, high output, environmental protection, fast heating speed, uniform heating and good controllability, and it can work continuously for 24 hours. Microwave baking equipment can be used for baking, puffing, drying and sterilization of bean products, such as chickpeas, kidney beans, black beans, broad beans, peas, cowpeas, red beans, mung beans, red beans and miscellaneous grains.
The characteristics of microwave grain baking equipment and puffing are as follows:
1. The energy conversion efficiency is high, the heating speed is fast, and baking sterilization takes only 3-1 minutes. The microwave oven itself does not generate heat, but microwave energy penetrates the material, so that polar molecules in the material rub against each other to generate heat. So there is no energy loss.
2. The puffing effect is obvious. The rapid heating effect of microwave makes the water molecules inside the material vaporize quickly, thus achieving the purpose of puffing.
3, low temperature sterilization, less loss of nutrients. Microwave sterilization is carried out under the dual effects of thermal effect and non-thermal effect of microwave. Compared with conventional temperature sterilization, it can obtain satisfactory sterilization effect at a lower temperature and in a short time.
4. Easy to use and operate. Both microwave power and conveyor belt speed can be adjusted steplessly, and there is no thermal inertia, so it can be started and stopped immediately, which is simple and easy to control.