Continuous tunnel micrwave tea leaf drying machine , tea sterilizer , tea fixation ...    More ...

Continuous tunnel micrwave tea leaf drying machine , tea sterilizer , tea fixation machine

I.Instruction:

Regarded as one new technology,microwave is widely used for tea fixation(kill green),tea drying,tea sterilization .  
In the fixation process, fresh leaves contains high moisture , and strong water absorbing microwave quality, can be polarized in microwave field , and change polarity orientation and make high speed movement as the frequency of electromagnetic field, produce friction heat,make whole tea heating in microwave , eventually make lots of water molecules overflow from fresh leaves and taken away by evaporation. Microwave heating can make tea rise temperature rapidly, reach passivation enzyme critical point temperature, it quickly passivation enzyme activity of tea.
And the electromagnetic field generated by the microwave heating and temperature field incombination will strengthen the deformation effect of the enzyme in tea, so as to achieve the purpose of fixation(kill-green). 

II.Microwave fixation drying features:
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. Repeated experiments and practice show that after treatment with microwave heating technology, has excellent characteristics of high-grade tea, dried tea appearance even, colour and lustre is green, fresh and pure taste, aroma rich, tender leaves evenly bright.
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.
III.Microwave Dryer Design Structure
1. Microwave heating box
a.Adopt 304# stainless steel material board;
b.Have 5 heating boxes which connected by stainless steel screws tightenly;
c.Design observation windows on the front of box , can see the materials situation  
   clearly.
d.To be safe, there is Automatic Power-off device while open the door of the  
    machine.
 
2. Microwave control system
  a. Control mode: common button control/PLC control
  b. Separate control cabinet.All control switches and displays focus on the central
     control cabinet.
  c.Temperature control mode: one set of far-infrared thermometer was installed on
     the top of last box to measure the product temperature.Set appropriate upper
     and lower limits of temperature to prevent insufficient heating or overheating of
     the material and ensure the final quality of the product. Measuring  
      range:0~300℃.
  d.Microwave power adjustment range: 0~20KW(adjustable)
  e.Every microwave source is an independent unit. If one is broken, the machine will
     not be prevented from running.
  f. Every magnetron has an overheating protection device.
  g.Monitoring system.From the monitor display device,you can see the products
     situation .
 
3. Transmission system
  a.Transmission type:frequency control of motor speed
  b.Transmission speed:0~10m/min(adjustable)
  c.Conveyor belt: high temperature resistance Teflon conveyor belt,special for
     microwave .Width:500mm
  d.Equip with manual deviation adjustment device to ensure stable and long-term
     operation.
 
4.Microwave safety protection system
a.There is one suppressor on the both side of heating box to prevent microwave
    leakage .
b.The doors of observation window are equipped with security protection system for
   opening doors and cutting off power.
 
5. Ventilation and dehumidification system
a.Equip with dehumidifying device, have 3 dehumidifying moths.
b.Use PVC tube to connect machine with dehumidifying fan,drain the moisture from
   inside cavity to the outside .
IV. Specification
  Electric power supply 380V,50Hz (Customized)
Microwave output power ≥28KW
Microwave input apparent power ≤20KVA (0~20KW adjustable)
Microwave output frequency 2450±50MHZ
Temperature measurement range and accuracy 0-200℃, accuracy±1℃
Equipment working ambient Temperature        5~40℃
No dust, no corrosive or explosive air
Feeding inlet height 60mm (Customized)
Conveyor belt Width       500mm
Speed 0~10m/min, adjustable
Material Food grade TEFLON
Overall dimension(L*W*H) About 9400*860*2050mm (Customized)
Microwave source parts 28 sets ( each set including: magnetron, transformer, diode, capacitor,fan)
Cooling type Air cooling
Control Manual control
Microwave leakage standard according with China GB10436-89 standard ≦2MW/CM2  (Ours standard≦5MW/CM2）
Safety standard According with China GB-5226 electrical safety standard.


 
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