The necessary procedures for plastic recycling and the role of shredders and crushers in the processing process
For a long time, various forms of plastic products have been widely used in residents' lives. In recent years, with the development of new businesses such as e-commerce transactions, express delivery, and delivery, the consumption of plastic bags and packaging has sharply increased, bringing pressure to the new resource environment. Disposing of plastic waste indiscriminately can lead to "white pollution", and the disposal of plastic waste poses environmental risks. Plastic crushers are essential auxiliary equipment in the plastic recycling industry, so what role do crushers play in the recycling of waste plastics?
1、 First, let's understand what plastic is?
Plastic is a polymer organic compound, a general term for thermoplastic substances such as fillers, plasticizers, and colorants, belonging to a family of polymer organic polymers.
Plastic classification: According to the characteristics of the properties of plastic after forming, it is divided into two materials: thermoplastic and thermosetting. Thermoplastic is a chain linear molecular structure that can soften and replicate multiple times when heated. Thermosetting plastics also have a network of molecular structures that will deform after hot processing and cannot be reprocessed.
What are common plastics in daily life?
The materials commonly used for plastic products in daily life include polyethylene (PE), polypropylene (PP), polystyrene (PS), polyvinyl chloride (PVC), polyester (PET), etc.
Its purpose:
Polyethylene styrene (including PE: HDPE and LDPE) is commonly used as packaging materials.
Polypropylene plastic (PP) is commonly used as packaging materials and rotating boxes.
Polystyrene plastic (PS) is often used to make foam plastics or snack boxes;
Polyvinyl chloride (PVC) is often used in toys and utensils.
Polyester plastic (PET) is often used to make plastic bottles, etc.
2、 Where is the waste plastic going?
Plastic is an artificial substance that is difficult to decompose and decomposes very slowly under natural conditions. Moreover, the capacity of a landfill treatment plant can only decrease after about a hundred years of decomposition; The environment caused by direct combustion and severe secondary pollution. When plastic burns, black smoke produces a large amount of dioxins. As a waste incineration site, strict temperature control (above 850 ° C) is required, and the collection of burned ash and subsequent solid landfill are carried out. Only in this way can the discharge standard of EU smoke from the incineration site be greatly reduced by 2000, resulting in environmental pollution.
Plastic waste poses many hazards, but it is not as harmful as "absolutely bad" recycling, which has a low destructive power. Plastic can be recycled as raw materials for heat generation and waste. The ideal treatment method for waste.
3、 Recycling and Reuse of Waste Plastics
How to recycle and reuse waste plastic? What steps do they need to go through before they can be reproduced as plastic raw materials?
Step 1: Classify and collect
This is a step in the treatment of waste plastic, which is convenient for future use. The discarded plastics during the plastic production and processing process, such as fragments, substandard products, and waste products, can be treated separately, without pollution, aging, and collected and disposed of separately. Perhaps everyone has seen many waste purchase stations. The waste procurement station is an important node for the recycling of waste plastics, and its main function is to collect various types of waste plastics in a centralized manner for processing and production by processing plants that handle waste plastics.
Step 2: Processing and production
After purchasing waste plastic from major waste procurement stations, our waste plastic processing plants begin to use specialized equipment to process and treat the waste, making it the raw material for plastic production.
So what is the specific processing program?
1. Pre crushing machine - Depending on the situation of different materials, a pre crushing machine can be selected to pre crush the materials, in order to make the materials smaller and facilitate entering the pre washing machine for pre cleaning to remove most of the sediment and other debris.
2. Pre washing machine - The purpose is to remove most of the sediment and debris from the original waste.
3. Shredder - The purpose is to further shred the pre shredded and pre washed plastic, tearing it into sizes of 40-60mm. This facilitates subsequent crushers for crushing and improves the efficiency of the crusher.
4. Crusher - The purpose is to perform secondary crushing on the output of the shredder to reduce its particle size.
5. Separation and sedimentation tank - The purpose is to separate and clean debris from the crushed material, and obtain clean and debris free plastic.
6. Friction cleaning machine - The purpose is to clean the plastic from the separation and sedimentation tank again to obtain clean materials.
7. Squeeze dryer, air dryer - The purpose is to air dry the plastic coming out of the friction cleaning machine to obtain dry and clean small plastic particles.
8. Plastic granulator - The purpose is to process and granulate clean and dry small plastic particles to obtain the raw materials for producing plastic.
From the above processing steps, it can be seen that plastic shredders, plastic crushers, cleaning machines, and granulators are essential plastic equipment in the plastic recycling industry. Good shredders and crushers can significantly improve the efficiency of plastic recycling. Meanwhile, good shredders and crushers can also help granulators obtain better plastic particles.
Vansheng Machinery Equipment Co., Ltd. is a strong equipment manufacturer that integrates production, consulting, sales, and after-sales service. At present, the company's main products include: single axis shredder, double axis shredder, four axis shredder, crusher, plastic cleaning and recycling production line, film recycling production line, wire and cable recycling production line, tire recycling production line, car shell recycling production line, and home appliance shell recycling production line, etc. We establish our foundation with high quality, from inside out, from senior management to employees, instilling a quality concept layer by layer, gaining trust from customers and development from the company.