Waste plastic recycling and recycling method

With people's attention to the environment and energy, the recycling and recycling of used plastics have also become more and more important, and the technology has become more and more mature. In general, there are three methods for recycling: physical recovery, chemical recovery, and energy recovery.

Physical recovery is also called mechanical recovery. It is a mechanical method. It mainly includes methods such as crushing, compaction and agglomerate, and does not change the original plastic properties. The chemical recovery includes hydrolysis and pyrolysis methods. The waste plastic material is heated. Solutions are recovered to monomer, fuel, or chemical raw materials; energy harvesting is the use of incineration to recover the energy from waste plastics.

This method has the following features: Physical recycling is the most commonly used recovery method at present, and it is suitable for almost all thermoplastic plastics and some hot isoplastics. It has low investment, simple process, flexible operation, and can implement large-scale commercial operations; chemical recovery The resulting monomers, fuel oil, and chemical raw materials are of high value, but the hydrolysis is limited to a few special plastics. The equipment for hydrolysis and pyrolysis is large in investment, complicated in technology, difficult in technology, and economically poor. At present, there are few commercialized ones; energy recovery is particularly suitable for heavily polluting waste plastics. It is difficult to economically use the above two methods. Recycling and recycling. Energy recovery is a method that has been adopted by some countries in the recent past. However, it also has drawbacks: The investment in equipment is large, and secondary pollution may occur during recycling.

In addition to considering technical factors, the choice of recycling method should also consider the sources, economic and social benefits of waste plastics. At this stage, there are many technical problems in the recycling process, but it is still difficult to make money economically. It is believed that with the advancement of technology and the reduction of recycling costs, this situation will gradually improve.

--China Plastics Industry Network