How to better choose the material of microwave drying sterilization equipment

The microwave drying and sterilizing equipment adopts microwave action, which can change the biological arrangement polymerization state and its motion law, and the ion field induced by the microwave field. The effect of the charge distribution near the cell membrane is affected, resulting in damage to the barrier function of the membrane. Affecting the function of the nano-potassium pump, causing membrane dysfunction, thereby interfering with or destroying the normal metabolic function of the cell, resulting in inhibition of bacterial growth, stopping or dying, thereby producing a bactericidal effect.
There are four major aspects to how to better choose the microwave drying sterilization equipment . For details, see:

1. To meet the needs of the materials being processed

The main task of microwave drying sterilization equipment is to dry a given material. Due to the wide variety of materials processed by the dryer, it covers many fields such as grain, food, pharmaceutical, chemical, forest products, paper, metallurgy, etc., and the products are difficult to count. The materials to be dried require a wide range of requirements. For example, chemical reagents, pharmaceuticals, electronic materials, electrical ceramic materials, etc. must not be mixed with iron ions. Therefore, carbon steel materials should be avoided in equipment selection. In addition, if the moisture content in the material contains acid, alkali, salt, organic solvent, etc., it will be corrosive to different metal materials. Especially in the heating process, the corrosion of the material will be intensified, so the appropriate material should be selected according to the characteristics of the moisture contained in the material.

2, to select materials for the equipment installation environment

In many cases, although the above conditions can meet the requirements, attention should also be paid to the material requirements of the equipment installation environment. If the equipment is installed in a chemical plant, the environment should be carefully considered for the corrosion of the equipment, the control system, and the electrical system, and a reasonable design plan should be taken.

3, to choose materials for the drying sterilization process

The microwave drying and sterilizing equipment also has different drying conditions depending on the materials, and the inorganic salt is also subjected to polymerization reaction while drying. The dry hot air temperature is required to be above 800 °C. The dry material has to choose high-temperature resistant stainless steel, but considering that the drying chamber is not in the high temperature zone, according to the calculation, only the high temperature resistant material is selected in the high temperature zone. It has been running for more than a year and everything is fine.

4, to select materials for the dryer type

As mentioned above, there are many types of dryers, each of which works differently, so it should be fully considered when selecting materials. For example, when the airflow dryer is used to dry magnesium oxide, the material is very high in the gas flow tube, the magnesium oxide material is hard, and the drying pipe is severely worn at the turning wall. Therefore, it is necessary to design an anti-wear structure or select a wear-resistant material in this area. . For another example, compared with carbon steel, the thermal conductivity of stainless steel materials is significantly lower than the former. Therefore, in the microwave drying equipment mainly based on conduction heat transfer, if stainless steel is selected as the main material, the heat exchange area of ​​the equipment should be calculated by the thermal conductivity of stainless steel. The engineering example proves that when selecting a steam heat exchanger, the stainless steel material is 30% larger than the carbon steel material.

The microwave drying and sterilizing equipment has the function of microwave sterilization and preservation, and it is the result of the combined action of microwave heat effects. The thermal effect of microwaves mainly acts as a rapid temperature-increasing bactericidal effect; the non-thermal effect mutates the microbial proteins and oyster active substances, thereby losing vitality or death. Therefore, the temperature of the microwave sterilization equipment is lower than the conventional method. Generally, the sterilization temperature of the conventional method is required to be above 100 degrees Celsius, the time is ten minutes to several tens of minutes, and the microwave sterilization temperature is only 85 degrees Celsius, and the time is several minutes, which can almost satisfy each The sterilization needs of the materials.