Patent ID: 11944116
Assignee: CHINA TOBACCO YUNNAN INDUSTRIAL CO., LTD.
Field: Other consumer goods (Other fields)
Classification: CPC A | IPC A

Claim 5:
6. A method for removing unwanted objects from cut tobacco in the cut tobacco production line, comprising removing the heavy unwanted objects, removing the moderate unwanted objects, humidifying the cut tobacco, and removing the light unwanted objects using the unwanted object removal device in claim 1, wherein:
removing the heavy unwanted objects comprises feeding raw cut tobacco to the pneumatic conveying pipe through the raw cut tobacco feeding device and the feeding air lock, the raw cut tobacco entering the pneumatic conveying pipe under action of the positive pressure fan on the pneumatic conveying inlet; separating moderate and light unwanted objects and cut tobacco from the heavy unwanted objects in the heavy unwanted object air selection and separation barrel under combined action of vertical upward positive pressure wind and gravity; transporting the moderate and light unwanted objects and the cut tobacco to the horizontal pneumatic conveying square tube, while the heavy unwanted objects fall into the mechanical dispersing device; loosening the heavy unwanted objects with the mechanical dispersing device; transporting the heavy unwanted objects using a positive pressure wind from the positive pressure air supply pipe along the inclined guide pipe into the air separation device; transporting a light part of separated tobacco in the heavy unwanted objects along the recovered tobacco conveying pipe back to the heavy unwanted object air selection and separation barrel using a vertical upward positive pressure wind in the air separation device, and discharging separated heavy unwanted objects through the heavy unwanted object air lock and heavy unwanted object discharge port;
removing moderate unwanted objects comprises recognizing the moderate and light unwanted objects and cut tobacco transported to the horizontal pneumatic conveying square tube with the image recognition system; identifying and removing the moderate unwanted objects in the cut tobacco using the moderate unwanted object removal system; moving the cut tobacco with moderate unwanted objects removed downstream along the transverse pneumatic conveying square tube to the vertical pneumatic conveying round tube, while the moderate unwanted objects move into the moderate unwanted object discharge barrel; and discharging the moderate unwanted objects through the moderate unwanted object discharge air lock and the moderate unwanted object discharge port;
humidifying the cut tobacco comprises spraying the cut tobacco in the vertical pneumatic conveying circular tube with the water vapor from the humidifying nozzles, and transporting the humidified cut tobacco to the light unwanted object air selection and separation barrel through the horizontal guide pipe; and
removing the light unwanted objects comprises floating the light unwanted objects upward along the light unwanted object air selection and separation barrel and into the light unwanted object collection device through the light unwanted object conveying pipe using a weak vertical upward positive pressure wind, and allowing the humidified cut tobacco to fall downward along the light unwanted object air selection and separation barrel and enter the purified cut tobacco collecting device through the purified cut tobacco discharging air lock.