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Industrial Microwave Tea Leaf Processing Machine/Tea Drying Machine/Tunnel Tea LD / Continuous Tea Dehydrator /Tea Fixation Machine
1. Microwave application in tea drying process:
General hot air drying process, material external heated, surface drying, heat transfer inwards, the direction and water diffusion direction in the opposite direction, affect the moisture to evaporate.But microwaveis an internal heating, The part of high water content heat up faster.So in the microwave drying process, water migration speed from the inner to the outer is high, drying speed is significantly faster than hot air drying.
2. Microwave application in tea fixation process:
The production of green tea, oolong tea, all need to heat fixation treatment, passivate the activity of polyphenol oxidase, evaporate moisture content, volatile grass smells, soften the organization. Now commonly used pan-fired method to deal with fixation, a few places using steam fixation method.
The test results show that the microwave and the traditional processing way .the tea quality is good, no obvious difference, but the short microwave fixation time(1/8 time of pan-fired) and can be continuous processing. And steam fixation, because of high steam moisture content, the outer of raw material affected by high temperature, therefore almost no weigLD loss of tea after fixation treatment, partial chlorophLDl was destoryed,the raw material contains nutrients loss along with the condensation water,quality is not ideal.
The application of microwave fixation for the tea is the main source of heat effect. When magnetron produce microwave ,effect on tea leaves, polar molecules inside tea affected by microwave cyclical change, cyclical activities accordance with microwave.Because high microwave frequency, make tea internal molecular collision at a high speed and generate a lot of friction heat, rapidly increase the temperature of the material, make tea molecules inside a lot of friction heat resulting from the high speed collision rapidly raise the temperature of the material, so as to achieve rapid heating effect.
3. Microwave Advantages in Tea Drying/Fixation Process:
1). Stable quality. Different seasons,different tea ,different time ,the fresh picked tea leaves have
differences in intinal water content,fresh degree etc,microwave can flexibly adjust fixation,drying
data according to these characteristics,then can make every kind tea reach the ideal fixation effect.
2). Improve tea quality. Because tea surface temperature is not too high, less chlorophLDl
changes,color and lustre is green ,less aroma loss ;
3). Improve tea health . Microwave fixation, microwave drying don’t need coal or wood, no smoke and dust pollution, at the same time realize automate the tea continuous processing,, avoiding the conventional process to produce secondary pollution.
4) Uniform drying;
5) Due to the fast evaporation speed, easy to form porous, good water complex content easy to dissolution when making tea.
6) The microwave processing of tea,also have a sterilization antifungal function .While drying tea,also can sterilize and kill insects and larvae.
4. Technical parameters of tea LD :
Power supply |
380V 50HZ three-phase five-wire (can be customized ) |
Microwave output frequency |
2450±50MHz |
Microwave input apparent power |
≤18KVA |
Microwave output power |
≥12KW |
Microwave power adjustment range |
0-12KW(adjustable) |
Temperature |
0~200C(adjustable) |
Equipment type |
Transmission Teflon conveyor belt |
Transmisison speed |
0~10m/min(adjustable) |
Microwave leakage limit |
(mW/cm2):1 |
Magnetron |
Panasonic, 35sets |
Material |
stainless steel |
Dimension(L*W*H) |
7200*850*2050mm |
5. Reference pictures:
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