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 Wysłany: Nie 3:50, 08 Maj 2011 Temat postu: franklin et marshall Plastic packaging materials r |
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Plastic packaging materials recovery and recycling
Will be a significant contribution. After the actual calculation, if the country produced 300 million tons of inorganic powder used in plastic packaging, can save at least 70 million tons of synthetic resin, which means less investment of hundreds of billions to build a large petrochemical companies, also in line with governance On the other hand, can be derived from natural sound with the return of the natural inorganic mineral raw materials instead of petroleum-based synthetic resin, is in itself a contribution to environmental protection. Waste and recycling in the soil water and carbon dioxide in the landfill is almost non-functional polymer materials, but plastic products in the inorganic mineral powders are rapidly eroding, resultant water-soluble to a certain extent, out of plastic products left by the pores, can greatly increase the area of plastic contact of oxygen is beneficial products, the aging and disintegration. After the plastic was in the landfill, calcium carbonate,[link widoczny dla zalogowanych], dolomite, talc and other inorganic minerals back to nature without harm to the ecological environment. It is understood that some companies have modified inorganic powders in the production of environment friendly plastic materials has made remarkable achievements. As Hai Linda Linda Plastic Chemical Co., Ltd. production (LD) polyethylene film photodegradation brand products (bag), due to meet the State Environmental Protection Administration has issued the technical requirements of the environmental label products, has won the China Environmental Labeling Product Certification; Hunan Environmental Science flood Plastic Co., Ltd. in the inorganic powder and modified plastics industry has also been taken into the market a solid pace. 3. Chemical degradation of plastic packaging materials recycled chemical degradation is the basic principle of regeneration of waste plastic products for the Central Plains resin polymer molecule chains more thoroughly decomposed, low molecular weight bring it back to the state, and some fraction is the monomer, the other component is a basic organic raw materials, different degree of polymerization of small molecules, compounds, fuel high-value chemical products. This approach can be recycled to make use of natural resources to really form a closed loop cycle. Regeneration of this method has the following advantages: First, decomposition of chemical raw materials in the quality of raw materials and new neck and neck, the same can be used with the new material, to the recycling; Second,[link widoczny dla zalogowanych], treatment with a considerable potential can achieve real governance formed white plastic pollution. So this method has a higher economic and social benefits, is the inevitable trend of development. It can be divided into depolymerization, hydrolysis, and alcoholysis,[link widoczny dla zalogowanych], thermal cracking, hydrogenolysis, gasification. Among them, the hydrolysis is a convenient and economical means of plastic recycling; thermal cracking is also a relatively promising technology, which attached great importance at home and abroad. Pyrolysis products of which the income can be divided into oil of the different processes, gasification and carbonization process. 4. Incineration heat recovery and landfill disposal (1) incineration. Incineration is not used for recycling mixed plastics and other waste as fuel mixture, placing it in the incineration incinerator, and then make full use of combustion heat. The greatest feature of this method is really a waste of things transformed into energy, while a significant volume reduction effect. The residue after combustion, small size, density,[link widoczny dla zalogowanych], when the landfill area is extremely small, also very convenient, while stable, easy to dissolve in the disintegration of the soil. But the burning method of the following shortcomings burning equipment the construction of a one-time investment, high cost; if not distinction,[link widoczny dla zalogowanych], incineration, and some plastic in the incineration process will inevitably produce secondary pollution, hazardous substances, such as SO, HCL, HCN so, the remaining remnants of the ashes of heavy metals and hazardous substances, on the ecological environment and human health hazard. (2) landfill. Landfill is a negative simple approach is to plastic packaging waste landfill in the suburban wasteland, or hollow in its own demise. But ordinary plastic to disappear for hundreds of years to decompose, so although the economy of this approach is simple, but for the reduction of environmental load is the least satisfactory. In short, a variety of plastic packaging materials according to different treatment patterns and quality of packaging and plastic packaging materials for the application of nature. The general principle is not in the recycling process of secondary pollution and is conducive to the most efficient resources and energy recycling. For example, for polyvinyl chloride can be re-mixed and then made into plastic, can also be modified processed into asphalt felt or plastic ointment; for polystyrene foam, you can re-foam re-use, but also modified the system as anti-rust paint or furniture, paint and construction and cement. For the polyolefin class and polyester, can be refilled like the direct recycling, reuse can also be crushed or made into Gaisu plastics. Therefore, waste plastic packaging material to form a complete set of comprehensive recovery management model and the comprehensive management of all efficient measures to make waste plastic recycling packaging materials adequately to reduce development of circular economy. Hand bag 20 countries spread Bi dark smoke
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