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Paper and paper separation will not? Jiuzhi Plastic tells you
There are three methods for separating paper and plastic : thermal separation, wet separation and electric separation. Below we look at the specific separation method:
1, heat division method
Method for realizing paper-plastic separation by changing plasticity after heating
Hot tube method
The separating device is composed of an electric heating chrome-plated cylinder and a built-in hollow cylinder (drum) with a scraper. The scraper is connected to the wall of the heating cylinder, and the two are reversely rotated, and a trough is connected to the bottom of the cylinder. The material is added from the feed, and the plastic component is melted upon contact with the hot cylinder, adheres to the wall of the cylinder, is scraped off with a scraper, and falls into the trough. This method can separate more than 90% of the plastic from the paper. The separated plastic has a small amount of paper and can be controlled below 1%.
Hot air flow method
The separation of the plastic film from the paper is achieved by the principle that the plastic film shrinks with heat and reduces the specific area. The film and paper mixture is sent to a heating zone, which may be an agricultural grain dryer, in the form of granules, thereby reducing its surface area, and then feeding it to the air separator, the air stream is a mixture The paper in the strip is taken away and the thermoplastic particles fall on the bottom of the separator. This method can completely separate plastic from paper.
2, wet separation method
The lightweight material obtained from the dry separation apparatus is fed to a pulverizer, and the pulverized pulp flows out from the small holes in the sorting plate, and the remaining plastic is discharged from a separation outlet and then sent to the dehydrator. Dewatering, and then sent to the air separator for separation.
3. Electric separation method
The paper-to-plastic mixture is fed into the separator by a vibratory feeder, dropped into a rotating milling drum, and then sent to a corona zone formed between the wire electrode and the crushed, and the paper is attracted to the electrode. The plastic is still attached to the drum and is collected as the drum rotates plastically to the bottom. When using this method, the humidity has a great influence on the separation result. When the humidity of the mixture is 15%, although the paper and the plastic can be separated, the plasticity is still contaminated by a large amount of paper. When the humidity is increased to 50% or more, the humidity can be made. Plasticity and paper are completely separated.