Paper Recycling Plants Information

The Weyerhaeuser Company has finished the restructuring of its paper recycling plant in Nashville. The contract, which was awarded to MSS, required the improvement of a high-speed automated optical sorting system for recycled paper. MSS say that the new technology is the first time commercially available to the world in shape of paper recycling plant of Weyerhaeuser Company. It is anticipated that the recovery of recycled paper is increased greatly by this paper recycling plant of Weyerhaeuser Company. Some important features of paper recycling plant of Weyerhaeuser Company are as follows.

HIGH-SPEED AUTOMATED OPTICAL SORTING SYSTEM
The latest high-speed system operates more than a magnitude faster than traditional manual paper grade sorting methods, while also allowing lower labor costs, less variability and higher quality. The motorized conveying system of the new sorting line is 4ft wide and runs at 365m/min (1200ft/min) providing a capacity of 2000kg/h (4400lbs/h). The paper sheets are spread out in a single layer on the conveyor strap. Each sheet of paper passes beneath the optical sensors. The optical characteristics of different paper grades for each object are dogged. A series of air nozzles then eradicate selected paper grade sheets, including heavy items such as magazines and newspapers.

The system is also competent of distinguishing between white, off-white, colored, brown and grey OCC. Three sensor types are incorporated into the sensor to accomplish these sorts. The trade name of the sensor is MultiGrade.

PAPER GRADE SORTING METHODS
Traditional paper grade sorting methods move paper along sorting belts at about 75ft/min (23m/min) in high-burden pits. Workers are placed strategically along the length of the belt and confiscate specific grades of paper as it passes by. This manual sorting system can be difficult, as defining the different paper grades becomes difficult with certain paper types, which emerge alike to the naked eye. An example of this can be seen when groping coated ground wood and white ledger. The two paper grades are very tricky to distinguish among by just looking and become very difficult to differentiate between when sorting. Therefore the traditional method of sorting the paper is not only expensive due to its labor intensive nature but can also be viewed as unreliable and normally slow.

BENEFITS OF THE NEW OPTICAL PAPER SORTING SYSTEM
The new system reacts to the optical characteristics intrinsic in different grades of paper. The new system’s high-speed sensors can differentiate those diverse paper grades to provide less variability in the end product. The system is competent of providing a more reliable grade to paper mills.

The Weyerhaeuser’s recycling plant presently has a full-scale system with a throughput of 4000lbs/h (1800kg/h) in use. Initial tests have proven successful removing specified grades of paper from a distinctive recycled furnish.