Microwave vacuum drying is a relatively new drying method. In this drying mode, the water molecules in the material placed in the alternating electric field are polarized and the movement is more intense, and the friction between the water molecules is stronger.
After friction heat generation, the surface moisture of the material evaporates, and a temperature gradient and a humidity gradient are formed inside and outside the material, thereby accelerating the outward migration of moisture from the material, and finally achieving the purpose of drying.
The main function
The microwave vacuum drying oven is designed and manufactured to meet the special process requirements of customers. It is suitable for low-temperature heat treatment of chemical, food, pharmaceutical, agricultural and sideline products, such as ginseng, donkey-hide gelatin, antler, extract and so on.
Features
1. Unique microwave source technology: Ensure that the system works continuously for 24 hours. Among them, the magnetron is specially made industrial grade water-cooled, the service life is guaranteed to be >5000 hours; equipped with special customized high-power high-voltage transformer, stable performance and long service life;
2. Unique microwave energy feeding mode: The company's unique technology is used for large-area feeding mode, which can ensure the microwave field average and reasonable distribution, improve the utilization efficiency of microwave energy, avoid the occurrence of local hot spots and splashing phenomenon, and greatly reduce the Damage to the magnetron;
3. According to the material dehydration process curve, the microwave feed inlet is reasonably arranged, and the effective dehydration is realized, and the temperature of the material is reduced as much as possible, thereby improving the energy utilization rate;
4. According to the air saturation curve and the dehydration process curve, the optimal parameters combination of material and temperature, intake air volume and microwave power are set to improve the utilization rate of microwave energy and ensure the dehydration efficiency;
5, using single-chip program control and digital technology, microwave output power stability is high, to achieve long-term continuous mode work;
6. Safe and reliable design of the whole microwave shielding cavity to ensure that the microwave leakage is extremely small, far below the allowable value of the national standard microwave leakage;
7. The temperature measurement point is set in the furnace cavity, and the user can monitor the processing process temperature as needed.
8, the drying is fast and uniform, several times to several tens of times faster than the conventional drying, the product quality is good, the yield is high;
9, the device has no thermal inertia, that is, open and stop. The temperature of the kiln is below 40 °C to improve the working environment of workers;
10, shorten the drying cycle, environmental protection and energy saving; accelerate capital turnover;
11, the degree of vacuum can reach 100 Pa, the minimum can reach 10-3 Pa, can achieve material drying at very low temperatures;
12, using optimized design to ensure equipment sealing and high compressive strength of the cavity.
The main technical parameters
1.;
2. Rated power: customized according to customer needs;
3. Microwave output power: customized according to customer needs;
4. Microwave frequency: 2.45GHz ± 25MHz
5. Temperature measurement method: infrared thermometer;
6. Temperature range: 0 °C ~ 300 °C;
7 system accuracy: reading ± 0.5%;
8. Circulating cooling water flow rate: ≥0.8m3/h;
9. Circulating cooling water pressure: ≥ 0.15Mpa;
10. Circulating cooling water inlet water temperature: 5 ~ 30 ° C;
11. The total hardness of circulating cooling water: <60mg / L (can be replaced by daily tap water);
12. Control system: PLC or embedded system plus touch screen control, with automatic manual operation dual function;
13. Microwave leakage: <1mw/cm2;
14. Vacuum degree: <100pa;
15. Equipment dimensions: customized according to customer needs.