Microwave low temperature drying equipment used in the pharmaceutical

　　Developed countries during the eighties has begun for industrial microwave vacuum drying equipment development, and achieved good results in practical applications. French International Microwave Microwave vacuum drying equipment company processing seedless raisins, the traditional craft 65 ℃, 24 Xiaoshi hot air drying becomes 50 ℃, 5 Xiaoshi microwave vacuum drying, product quality and yield are greatly improved. The late nineties I started research and development units in the domestic first microwave vacuum equipment, through years of efforts to complete the industrialization 10KW microwave vacuum drying equipment developed in the second ○○○ Nian. Pharmaceutical engineering, biological engineering, chemical engineering, materials engineering, and agricultural processing provides a new and efficient drying equipment.

　　Second, the advantages of microwave vacuum drying equipment

1, high

　　Conventional vacuum drying equipment used steam heating needs to be heated from the inside out, slow heating requires a lot of coal, while the microwave vacuum drying equipment is used in an electromagnetic wave heating, no heat transfer medium, directly heated to an internal body, heating speed, 1 kilowatt of microwave energy within 3-5 minutes at room temperature water was heated to 100 ℃, to avoid the above disadvantages, so fast speed, high efficiency, greatly shorten the drying cycle, reduce energy consumption. And compared to conventional drying technology can improve efficiency more than four times.

2, uniform heating

　　Because microwave heating, from inside to outside is performed while heating the material, the material temperature difference is small enough to not generate heat inside and outside the inconsistent condition occurring in conventional heating, thereby producing the effect of puffing, conducive ground, greatly improved the quality of the dried .

3, easy to control, automate and facilitate continuous production, since the microwave power can be adjusted quickly and without inertia characteristics, easy to instant control, which could be between 40 ℃ -100 ℃ · China Building Material - Building Materials Made Easy · top three, disdain counterparts

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4 adjust the temperature, equipment, small size, easy installation and maintenance

5, products of good quality, compared to conventional methods, the quality of processed products has dramatically increased.

6, microwave disinfection, sterilization efficacy, product safety and health. Long shelf life.

7, significant economic benefits.

　　From the characteristics described above, the energy conservation, energy, improve product quality, health and safety, equipment investment and low cost aspects can be seen in its economic and social benefits significantly.
　　Third, the basic structure and working principle

1, a flow chart of microwave vacuum drying equipment used in the processing of precious herbs (slightly)

Fourth, the control circuit design

1, the block diagram circuit (omitted)

Fifth, system design

1, pump selection

2, the material turntable design

3, the whole heat balance design

4, power regulation design

Economic Benefit Analysis

Jiangxi, a pharmaceutical process performance and processing of various drying equipment, economic efficiency and product quality are compared, the comparison between drying as follows:

Items dynamic flash drying microwave drying spray dryer

Drying time 70 minutes 45 ~ 3 ~ 20 ~ 45 hours 5 seconds

The drying temperature is 45 to 60 degrees (arbitrarily set) into the wind 180 degrees 50 to 60 degrees (refractory)

Extract loss above 02 to 5% 3%

4 parts water to 5% 2 ~ 4 ~ 6% 4%

Content consumption increased by 20 to 30% higher than other equipment decreased by 20 to 30 per cent in 20 to 30%

Yield the same one we need three conditions required 5

Cost per kg of dry extract of 0.4 to 0.5 yuan / kg 3 ~ 4 Yuan / kg 3 ~ 4 Yuan / kg

Drying method: Process Configuration

　　As can be seen above: Dry lowest cost, best benefits, equipment, small footprint, equivalent to 20% steam vacuum dryer area, 30% of the spray-drying equipment, significant savings in purification plant. Dynamic vacuum microwave drying machine, not only for medicine extract the face of health care products, food and chemical products, especially the paste, the viscosity of the material, more appropriate; but also play a better role in killing bacteria.

VII Conclusion

　　Development of industrial vacuum microwave drying equipment success, to fill the gaps, this high-tech equipment greatly promoted the development of national technology, especially the development of the pharmaceutical industry, for this will have a profound impact. At the same time it also successfully developed for the application of microwave energy has opened up a broader area.

　　The successful development of products, many key technology breakthrough progress, also made some theoretical basis and design methods, and made a lot of valuable experience in practice, and laid a solid foundation for the further development of technology.

　　The practical operation shows that the device performance, advanced technology, reasonable design, is a significant economic benefits, social good, high promotional value of new technologies and products.