Fluoroplastic waste refers to waste fluoroplastics or products that pollute the environment in daily life and other activities. There are many types of fluoroplastic waste, the most common are discarded daily fluoroplastic products (such as waste fluoroplastic shoes, table cloth, baby diapers, waste fluoroplastic bags or artificial leather bags, fluoroplastic cosmetic bottles, medicine bottles, etc.), discarded agricultural fluoroplastic products (such as used shed film, plastic film, etc.). In particular, fluoroplastic packaging and disposable fluoroplastic products have become one of the main components of waste plastics, and are easily ignored by recycled fluoroplastic manufacturers, affecting the urban landscape. This part of fluoroplastic waste is often called "fluoroplastic waste plastics" abroad ".

Impact of fluoroplastic waste on the environment

At present, about 30% of the total output of fluoroplastics belong to disposable packaging products, medical and health products and plastic films with short service life. After using them, some of them become municipal solid waste into waste plastic treatment system. Part of it is discarded at will to become waste plastics that hinder the landscape. In the former western developed countries and major coastal cities in China, the weight ratio of fluoroplastic waste to municipal solid waste plastics has increased to about 8-10%, while the volume has reached more than 30%. Due to the light weight and large volume of fluoroplastics, it is not easy to degrade, which not only increases the difficulty of waste plastic treatment, but also takes up many limited land resources. Therefore, it has a certain degree of impact on the environment.

DueRecycling fluoroplasticsManufacturers are not strong in environmental protection awareness, and lack of strong comprehensive management countermeasures and measures for waste plastics, resulting in a part of fluoroplastic waste scattered in nature, which not only causes landscape pollution to land and sea, but also destroys the ecological balance of the environment. even endanger the lives of wild animals. This is the recycling of fluorine plastic manufacturers used to call "white pollution".

Measures to reduce or prevent the environmental impact of fluoroplastic waste

At present, the main countermeasures in foreign countries are to strengthen comprehensive management and adopt the policy of combining prevention and treatment such as volume reduction, volume reduction, recycling and degradation. The main measures are summarized as 3R and 1D. 3R is the reduction of fluoroplastic packaging waste (Reduce), the reuse of fluoroplastic packaging products (Reuse), and the recycling of fluoroplastic packaging waste (Recycle). 1D is the development of environmentally friendly degradable fluoroplastics (Degradable). Therefore, the current recycling of fluoroplastics and the development of biodegradable fluoroplastics has become an important way to prevent environmental pollution of fluoroplastics waste.

Recovery, disposal and regeneration of waste fluoroplastics

In the recycling process of waste fluoroplastics, the most important thing is the recycling and pretreatment of waste fluoroplastics. Because most recycling technologies have certain requirements for the type and impurity content of waste fluoroplastics, if they cannot meet the requirements, they cannot receive Good economic benefits. However, the classification and collection procedures of waste plastics in China are very low, which brings great difficulties to the recycling of waste fluoroplastics.

At present, there are two main ways to deal with waste fluoroplastics at home and abroad: incineration and sanitary landfill incineration are also ways of recycling. Through combustion, waste fluoroplastics can generate a large amount of heat energy and greatly reduce the volume, reducing the harm of landfill to the environment and reducing the cost. However, fluoroplastics contain more chlorine components, so the hydrogen chloride gas generated in the incineration process will corrode boilers and pipelines, and the tail gas contains furan, dioxin and other pollutants, so it is necessary to strengthen the control of the incineration process of the furnace body, requiring the combustion temperature to be about 800-1200, and controlling the flue gas residence time not less than 2 seconds and other technical indicators. For waste fluoroplastics that contain more impurities and cannot be recycled, this method can be used for disposal. Sanitary landfill does not need to separate fluoroplastics from waste plastics. It is very simple to collect and place everywhere, and the investment is small. Therefore, it is a commonly used method in the world at present. However, due to the fact that fluoroplastics cannot be biodegraded, landfill sites are becoming increasingly tense and resources are exhausted.

The recycling of waste fluoroplastics has a wide range of recycling. At present, the commonly used technologies include the following: melting regeneration, pyrolysis to produce fuel, gasification and other methods to make coatings, building materials and use heat energy to generate electricity, creating good economic benefits.

The degradation of fluoroplastics refers to the polymer reaching the end of its life cycle. As a result, the molecular weight of the polymer decreases and the physical properties of the polymer material (fluoroplastic) decrease. Typical manifestations are: fluoroplastic brittleness, chipping, softening, hardening, loss of mechanical strength, etc. All fluoroplastics can be degraded, but there are difficult points. The aging and deterioration of fluoroplastics is a degradation phenomenon. However, it will take decades or hundreds of years for fluoroplastics to degrade into environmentally harmless (less harmful) fragments or into CO: water and return to the natural cycle. Degradable fluoroplastics refer to a kind of fluoroplastics that add some additives to promote its degradation function, or synthesize fluoroplastics with degradation properties, or fluoroplastics made of renewable natural raw materials, which can meet the original application performance requirements during the use and storage period, and after use, under specific environmental conditions, make it change its chemical structure significantly in a short period of time, thus causing loss of some properties. Degradable fluoroplastics are usually used more polyethylene, polypropylene, polystyrene and other polymers, which are mainly olefins obtained from petroleum cracking as the main raw material, olefins are a class of hydrocarbons, the environment will not have adverse effects.

The process from collection to recycling of waste fluoroplastics faces not only technical problems, but also the improvement of environmental awareness and environmental management of recycled fluoroplastics manufacturers. The treatment of solid waste, especially the resource utilization, must be supplemented by government intervention and public environmental education, so that many current technologies can be promoted and utilized. It is hoped that under the voice of "eliminating white pollution and giving back clear water and blue sky, promote the resource utilization of non-degradable waste fluoroplastics and the widespread use of degradable fluoroplastics, and return Mother Earth to a new clear water and blue sky.

This article comes from:www.tflpfa.com

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