Low-temperature Microwave Vacuum Drying Technology of Shredded Tobacco
A technology of microwave vacuum drying and vacuum drying equipment, which is applied in the field of shredded tobacco drying process and low-temperature microwave vacuum drying technology of shredded tobacco, which can solve the problems of poor quality of shredded tobacco, low filling value, crushing, etc. Excellent processing resistance
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Embodiment 1
[0025] Tobacco shredded with a grade of "C1L", use the WZ1 jet vacuum dampening machine to regain moisture to 50% (G / G), and balance the moisture for 120 minutes, and use the SL-I-1000 fluidized bed quick-freezing machine to cool down to - 30°C, the cooled cut tobacco is sent to ORW series microwave vacuum continuous dryer for continuous drying, the vacuum pressure is 2kPa, the drying temperature is 18°C, the outlet moisture of cut tobacco is 12.5% (G / G), and qualified cut tobacco is obtained.
Embodiment 2
[0027] Tobacco shredded with a grade of "X1F" is rehydrated to 60% (G / G) by WQ341 drum-type shredded leaf dampening machine, and the moisture is balanced for 30 minutes, and sent to a -20°C freezer for 120 minutes to a temperature of -15 ℃, the cooled cut tobacco is sent to YN-60kW microwave continuous vacuum drying equipment for continuous drying, the vacuum pressure is 850Pa, the drying temperature is 10℃, the moisture content of the cut tobacco at the outlet is 12.5% (G / G), and qualified cut tobacco is obtained.
Embodiment 3
[0029] Tobacco shreds with a grade of "X4L" are dampened to 30% (G / G) by a WZ1 jet vacuum dampening machine, and the moisture is balanced for 180 minutes, and then sent to a -15°C freezer for 100 minutes to a temperature of -10°C. The cooled shredded tobacco is sent to YN-60kW microwave continuous vacuum drying equipment for continuous drying. The vacuum pressure is 30KPa, the drying temperature is 70°C, and the moisture content of the shredded tobacco at the outlet is 11.5% (G / G). Qualified shredded tobacco is obtained.
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