1)Working time:continuous 2)Dehydrating time:10-20min 3)Stainless steel 4)Microwave leakage:less than 5mw/cm2
2.Applicable Scope of Tunnel potato dryer
1)The flavorings spice
2)Subsidiary agricultural products, deep processing products of fruit,vegetable
3)Various dried meat, like beef, pork, chicken,duck, fish etc.
4)The grain, the deep manufactured products
5)Sterilization of beverage and the wine, the meat, the marine product, the roasted seeds and nuts, and etc.
6)Chemical material,medicine tablet
7)Powder for various material
3.Features of Tunnel potato dryer
1)Machine material: food-grade stainless steel
2)Energy-saving more than 30%
3)High production efficiency
4)Improve product quality: nice color, good taste
5)Safety and pollution-free
6)Improve working conditions: PLC touch screen control, automatically operation
4.Microwave heating chamber of Tunnel potato dryer
1)Heating chamber made of stainless steel sheets with the thickness of 1.5mm.
2)Microwave generator made of common cold-rolled sheet with the thickness of 1.2mm
(inner frame made of 40*30 square tube).
3)Monitoring table made of common cold-rolled sheet with the thickness of 1.5mm.
4)Stand made of 40*60 square tubes with the thickness of 3mm and the level-adjusting legs.
5.Controlling system of Tunnel potato dryer
1)Controlling way: PLC man-machine programming control, with push-button switches.
2)Temperature controlling way: American RAYTEK non-contact far infrared temperature detector with
automatic temperature adjustment and measuring range of 0-300℃.
3)Microwave power adjusting range:3KW-sectional adjustment.
4)Others: opening or closing doors with power-off protection.
5)Main controllings including:
Power controlling.
Temperature controlling.
Transmitting belt speed controlling with frequency conversion.
Circuit protection controlling(with the protection of fusing wire to returning circuit, the control of circuit breaker to main power-supplying circuit and the installation of high voltage safety device to high voltage returning circuit).
Over-heating protection.
Chamber door power-off protection.
6.Transmitting system of Tunnel potato dryer
1)Adjusting speed with frequency converse.
2)Speed:0-10.0 M/min.
3)Transmitting belt: PTEF high-temperature resistant belt special for microwave, 0.5 mm thickness,
food grade.
4)Belt width:1000mm,total length:34000mm.
5)Supporting roller length:400mm/one.
6)Supporting roller installed with bearings good for belt movement.
7)With manual adjusting device, ensuring a stable and long-time operation.
7.Microwave safe system of Tunnel potato dryer
1)Having microwave controllers before and after heating chamber.
2)Heating chamber with six doors having microwave-shielding material.
2)PVC tube leading moisture to the workshop outside.
9.Equipment structure of Tunnel potato dryer
Microwave drying machine includes loading machine,micro heating chamber,microwave generating installment,microwave controller,transmitting system,controlling and monitoring system,water and heat discharging system,and so on.
10.Equipment-designing characters of Tunnel potato dryer
1) The main body being made of stainless steel with smooth, elegant appearance. According with National Food Machinery Safety Standards and GMP standard.
2) Energy feedback ways: from the equipment top , energy being radiated through numbers of holes , resulting in the most of microwave energy efficiency. The remaining microwave ratio is less than 2.5.
3) Equipped with imported infrared thermal detector with the limitation of the lowest and highest temperatures so as to guarantee the final product quality.
4) Equipped with original Samsung magnetrons and 4300V high voltage transformers so as to ensure the equipment life.
5) Dehumidification system and heat system being separated so as to improve anti-corrosion capability of
equipment.
6) Equipped with PLC man machine programming control, being able to adjust microwave input power in time
so as to save energy.
7) Equipped with special loading set ensuring uniform,smooth,convenient and loose material loading.
8) Having three sets of detectors so as to observe material movement at the same time.
9) Dehydrating fan installed outdoorly so as to reduce indoor noises.
10) Equipped with 123 sets of magnetrons with circulating working based on material-loading quantity so as to
prolong equipment life .
11) Equipped with 123 sets of magnetrons with circulating working based on material-loading quantity so as to
prolong equipment life.
11.Operation of the equipment of Tunnel potato dryer
Raw materials are spreaded on the transmitting belt with the help of loading machine. The plenty of raw materials transmitted from microwave controller to microwave drying chamber after turning on the conveying equipment and turning on the microwave button. With the entry of raw materials, automatically PLC control system opens the microwave power, at the same time the temperature control system is also opened automatically. Raw material can be dehydrated after being heated in the microwave drying chamber . Under the help of the PLC control system, automatic program can adjust conveying belt speed, adjust the material dehydration duration before raw material is completely dehydrated. After the dehydrated raw material is unloaded from controller ,the drying process will be completed.
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