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Foam plastic lunch box recycling technology equipment

June 12, 2019

First, the processing mode of foam plastic lunch boxes

The processing mode for handling foamed plastic lunch boxes at home and abroad is probably the following modes:

1. Use of foam elastic cement: After washing with recycled foam plastic lunch boxes, it is usually crushed to 2mm or less, added to cement, and used as the topmost heat-insulating application of floors, commonly known as foam cement.

2, hot melt volume reduction treatment: The main heating method is to generate hot air heating or lamp oil, or the use of steam hot air to reduce the capacity, the principle of volume reduction is to use hot air or electric heat to push out the air in the foam, to achieve capacity reduction effect. Mainly because of the large volume of foamed polystyrene and high transportation costs, the use of hot melt can significantly reduce the cost of transportation. The hot melt is the best mode for intermediate reduction. This is most common in Japan. It can be broken and introduced into granulated processing applications. However, the foamed plastic lunch box contains a large amount of food residue after use. If it is not cleaned, the directly hot melted block material has a heavy odor and is difficult to reuse, or can only be used as the most inferior filling application.

3. Use of granulated reprocessing: The granulation processing mode is the traditional way of plastic processing. The plastic itself is a by-product of light oil cracking. The cracking process uses different temperature stages to fractionate different fuel oils. During the process, from the viscous liquid state of the petroleum brain to the vapor state, the by-products are also produced. Some of them become solid after cooling, and some of them are still liquid. These by-products can be re-polymerized and cooled. Particles. Plastic Products in daily life are manufactured using these plastic granules, so these plastic granules are often referred to as plastic raw materials. Therefore, when we recycle a variety of plastic products, of course, it must rely on heating to melt it into a liquid, drawing in the liquid state and use water as a medium for cooling and granulation, it is granulated processing. Of course, in the process of processing, the plastics that may be recycled are too large, the pelletizers that must be broken to feed, or they may be dirty, must be cleaned, and once decontaminated, they are dewatered. If there are too many impurities, they must be filtered. Mesh to help remove impurities.

4, thermal cracking oil treatment:

The pyrolysis process mainly considers that different kinds of waste plastics are mixed together, or too dirty and a large number of impurities are not easy to be classified and cleaned, the re-processes considered, of course, some single-variety contents are high, and when the products have high benefits, they can also be considered. Production methods, such as the use of EPS packaging foam to refine SM benzene monomer, use of silicon products to extract silicone oil. Thermal cracking requires a pressure cooker that places the plastic in a pan and uses warming to reduce the plastic to heavy oil, which can then be fractionated to a better light oil or diesel fuel. The pyrolysis must consider the batch nature of the feed, the convenience of the discharge of the residue, the consistency of the heating of the raw material in the pot, etc., so that the oily pyrolysis can produce good economic benefits.

5, the use of paint and waterproof materials: the use of xylene or diesel or other formulations to dissolve the foam to form a viscous state, the use of polystyrene molecules themselves good water resistance, can be used as paint or waterproof material, the best upstream raw material.

6. The defoaming treatment of limonene: The molecular linkage in limonene is similar to the molecular linkage of polystyrene. If the appropriate formulation is added to citralene, the foam can be easily decomposed, so it is also called limonene Foam. The defoamed limonene can be recycled and used to reduce the cost of use. The defoamed foam can be heated to form granules for regeneration.

Second, recycling processing equipment

The regeneration treatment process is mainly the use of three cleaning pools for cleaning, and then the use of squeeze drying dehydration to remove water, heat melting granulation production mode.

1. Classification platform: After each recycling vehicle passes through the pound, the recovered plastic lunch boxes are unloaded at the stacking yard. After the number of audits is correct, three operations are responsible for feeding the platform into the cleaning pool. The height of the feeding platform About 1.1 meters into a rectangular space of about 3 square meters, two operators in the classification platform for the unpacking of foam plastic lunch boxes, chopsticks mixed with foam plastic lunch boxes, napkins, chopsticks sets or other foreign bodies, especially wire And so on, another operator assisted in picking up the goods on the platform, sorting the debris on the ground, and retrieving the LDPE recycling bag for the packaging of foam plastic lunch boxes. It was also necessary to pay attention to the height of the water in the washing pool and to add alkali to the pool in due course. The tail end of the sorting platform is placed directly above the pool. A three-leaf slurry at the pool connection uses mechanical principles to send the lunch box to the first cleaning tank.

2, the first cleaning pool: the role of the first cleaning pool is soaked, the use of three large drums to force the foam plastic lunch box to the water three times, so that the residual food residue in the foam plastic lunch box can be separated, three Each tube is equipped with fifteen to eighteen blades, which can be broken at the same time to replace the original crusher.

3, the second cleaning pool: after washing the first washing pool crushing, using a fishing machine to get the foam plastic lunch box to the second pool, the pool and the first pool the same, a total length of 12 meters, a width of 1.4 m, the main purpose of this pool is to add protopine (above 99% purity) to remove grease from foam plastic lunch boxes, especially salad oil, soy sauce, hot oil, curry and other difficult to clean grease. This pool has a total of five tappings to fetch water. On the one hand, the debris from the foamed plastic lunch box goes forward. On the other hand, the foamed plastic lunch boxes can be fully exposed to alkaline water.

4, the third cleaning pool: As alkaline water is prone to corrosion equipment, must use a fishing machine to take the foam plastic lunch box debris picked up into the conveyor belt, sent to the third pool of water and then remove the alkaline water.

5, dehydration squeezed part: foam plastic lunch box itself is a foam material, more than 90% are voids, once it is washed, it is difficult to dehydration, it can not be used traditional centrifugal dehydration method, if the cost of fuel is also very high, and The efficiency is slow, and it cannot be operated on a large scale. The Green Keep company uses squeeze feed to dewater. Because the granulation processing method is adopted, the water content in the screw of the granulator cannot be too high, and the suitable moisture content is preferably below 12%, so that the production can be smoothly performed.

6, hot melt granulation part: granulator mining two-stage type machine, screw length to diameter ratio of 28:1, power is 55KW, diameter 150mm, the first paragraph of temperature control to 200-220 °C, change the net oil pressure Automatic network device, the second temperature control at 160-180 °C. Due to the high moisture content of raw materials and the presence of various food fats, during the first stage of granulation, there will be steam accompanied by fumes that resemble kitchen fumes. Therefore, it is necessary to use electrostatic dust collection for absorption and disposal. Air pollution.

7. Drawing, pelleting and packaging: There are 25 filament holes in the drawing, cut into pellets of 2mm or less by the pelletizer, packed in bags of 25kg per pack, and then processed and used by the customers themselves.

8. Wastewater Disposal: As the production process generates a large amount of waste water, especially COD above 10000PPM, the plant also invests in waste water treatment equipment. It treats 24 tons of waste water per day to reach the third-level discharge standard, and 50% of the water can be recycled. The pool is sent to the cleaning tank for reuse, and 50% is sent to the nearby wastewater treatment plant for further treatment to the first-level emission standard.

Third, the use of recycled products

Foam plastic lunch box discarded food boxes produce better quality regenerated particles, as a variety of stationery, office supplies, wood raw materials for building materials, widely used in heels, shoe soles, air conditioning filter support frame, stationery, pen holder, Enameled wire take-up spool, raincoat button, plastic wood photo frame, crafts fan and so on.

Fourth, conform to the trend of circular economy

The operation of the recycling and recycling system is the way through recycling and recycling and recycled products, making PS materials life-sustaining, and also in line with the global "recycling of resources" trend. Foam plastic lunch boxes are a kind of food containers that are easy to recycle and widely used for recycling. From the four-year recycling work in Shanghai, we believe that the recycling and recycling of foam plastic lunch boxes can be promoted throughout the country and not only solve part of the laid-off workers. Work can save many resources in the era of high-priced energy. As an environmental protection industry company, we are constantly improving ourselves, and we hope we can work together with all people of insight to create a healthier and purer life for humanity.



(Paul Green)

Source: Shanghai Packaging


Our company also main to design Plastic Products, Paper Products, Wooden Products, Household Products, Stationery Products, Sewing Products and so on

Triple C International (ShenZhen) Co.,Ltd. was established in 2018. It`s a professional foreign trade company engaged in import and export trade, and carries out business operations such as international trade, cooperative production and intermediary trade. The company mainly provides high-quality OEM-product and ODM-product services for customs in Japan, Southeast Asia, Europe and Unite States, and has a professional technical team that provides hundreds of OEM-product services for dozens of customers, and has dozens of excellent suppliers. The company mainly provides sewing products, plastic products, paper products, wooden products, household products and other OEM services, including handbags, gift boxes, Storage Boxes, stationery boxes, kid toys, Paper Boxes, school supplies, office supplies and other products import and export business.

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