Waste plastic film recycling technology attracts attention

In recent years, the extensive use of agricultural films has caused extensive attention to the development and promotion of the recycling of used agricultural film. Recently, the recycling and recycling technology of waste plastics organized and developed by the China Petrochemical Corporation has passed the appraisal. This technology can recycle waste plastic film and greenhouse film to oil, paraffin and construction materials after recycling, which not only solves environmental problems, but also The utilization and economic benefits of renewable resources have been increased, which has opened up an economically effective way to control the 'white pollution' caused by the waste agricultural film.

The continuous innovation of agricultural film application technology has improved the integration of agricultural technology and effectively promoted the transformation from traditional agriculture to modern agriculture. At present, the use of agricultural films in rural areas is increasing year by year, and it usually becomes waste after 2 to 3 years. Because it cannot be naturally degraded, it seriously pollutes the environment. For the treatment of abandoned agricultural film, landfill and incineration methods have been widely adopted at home and abroad for many years. However, studies have shown that waste plastic can not be decomposed until more than 200 years after landfilling, and toxic substances are dissolved in the decomposition process, which can easily cause damage to the soil. Incineration causes harmful gases to be released into the air, causing air pollution. Today, the technology for the catalytic cracking of abandoned agricultural membranes into fuel has been successful. With continuous production of the technical equipment, the ability to dispose of used agricultural membranes on a daily basis is strong, and the oil output rate can reach 40% to 80%. The diesel conversion rate is high and it meets the standards for vehicle fuel and environmental discharge standards.

In addition, since polyvinyl chloride films contain 30% to 37% of dioctyl phthalate (DOP), ambient temperature solvent extraction DOP technology can be used to recover the solvent at temperatures lower than 800°C. DOP is a widely used plasticizer, the current market price of 7000 ~ 8000 yuan / ton, recycling 1 ton of waste polyvinyl chloride film can profit more than 2,000 yuan, and eliminate environmental pollution. After the thermoplastic materials such as waste agricultural film are processed through a certain process, they are used as matrix materials, matched with appropriate additives, and formed on the basis of ball-ball and ball-fiber stacking systems through special interface treatment and compounding process. Composite material. Different solid wastes, using different formulations and processes, can develop composite materials with different properties. Due to the hot plasticity and cold workability of this material, it can be made into various wood substitutes, steel substitutes, plastic substitutes, and ceramic substitutes. More than 95% of the raw materials of this material are the most common waste, and the price is much lower than similar products.