An Apparatus For Plastic Recycling Machines
An apparatus for plastic recycling machines or decompstiong waste plastic is decomposed
in a diluent such as hot oil through actions involving free readical precursors, such as polyvinyl chloride or polyurethane is achieved at low temperatures. The thermal decompostion (or pyrolysis) reaction is for about 1 hour at 375 C. annd usable products, such as distillate, coke and oil are recovered. Additonally the diluent my ber recycled within the apparatus. Waste plastics, that is synthetic polymer-containing substances, pose an environmental issue because of the problems associated with disposal: a large volume of non-biodegradable material. Because of the limits on landfill capacity, future recycling or decomposition is a necessity. Direct recycling back to the manufacture is not always feasible because such waste plastic is often mixed with respect to polymer type and separation is uneconomical. Economical considerations for processing waste plastic often require the use of the unseparated mixed waste plastic. Plastic recycling originated with the manufacture of synthetic thermoplastics. Rejected parts, trim, and flash from operations represented valuable materials that were ground and recycled with virgin material. This process was potentially repeated a number of times provided the percentage of regrinds remained low. As long as the plastic scrap generated by the industry was clean and uncontaminated with other plastics, reprocessing within the industry continued to expand, provided the price of virgin plastic remained high. After 1960 with a decrease in prices, profit margins for plastic scrap were squeezed, and disposal instead of reprocessing often occurred.
Plastic is one of the most used materials in today's world because of its properties as lightweight and durable material. Its popularity, however, is also its curse. We are using more plastic products than ever before and filling our landfills with plastic waste that does not biodegrade for centuries.
plastic recycling line , however, is one of the easiest ways for you to be environmentally friendly, and recycling and lengthening the lifespan of plastic products are important for the health of our planet.Many everyday items are made of plastic and are easily recyclable in most recycling facilities. Most common recyclable plastic products are beverage bottles used for water, soda and juice, plastic bags and plastic containers that come with many food products. Just wash all the plastic items and then separate them based on their resin identification codes.
After 1970, plastic prices rose again due to OPEC raising the cost of petroleum feedstocks and recycling practices again increased. Interest increased not only in processes for reclaiming waste plastics, such as product evaluation for chemicals and fuels, but also in the necessary step of separation of plastics from other waste material. A review of this early history of plastics recycling is given by R. J. Ehrig in Plastics Recycling, Oxford University Press, N.Y., 1992, hereinafter referred to as Ehrig (1992). Some of the early operating plants for
Waste plastic recycling included a Department of Energy funded plant in LaPorte, Tex., which used a fluidized bed of sand and was designed for 17 million pounds per year of atactic polypropylene. It ran from 1980-82. In 1984 at Ebenhausen, Germany, a 20 million pound per year plant used molten salt with a fluidized bed reactor to process plastic wastes and tires.
In all cases economics governed whether such plants continued operation. Since 1985 plastics recycling has become more economically feasible due to continued plastics technological growth and increased environmental concern, however, significant cost impacts remain due to the level of the elevated temperatures previously required. Recycling plastic products saves energy that would have otherwise been used to make plastic products from virgin materials. Manufacturing plastics from recycled plastic products uses only two-thirds of the energy used to make plastics from virgin materials. In addition, recycling saves energy that is used to transport different materials for virgin plastic to countries and cities where finished products are manufactured or used. Energy savings are even bigger if recycling is done close to the area where
Waste plastic recyclings are reused.
The present invention relates to a process which overcomes the above-mentioned deficiencies in the prior art and to a process which achieves decomposition of waste plastic at a relatively low temperature. As one example, the process decomposes a mixed stream of waste plastic at a temperature generally less than 375 C. in a hot oil medium. The process converts the polymeric structure of the waste plastic or plastics to smaller chemical molecules such as the monomeric units and related chemical structures at a relatively lower temperature. It also serves the market for the such products. Since this market is not a to-be-developed manufacturing process, but rather one for which existing plants in the refining and petrochemical industries already exist, the process is adaptable to existing facilities that are already experiencing limited supplies of low molecular weight, heteroatomic free feedstocks from petroleum crude oils. The low-molecular weight distillate from waste plastic processing according to this invention may help reduce the demand for imported petroleum products and help decrease our dependence on foreign crude oil.
Oil is one of the components needed to make plastic. Decreasing the amount of plastic items manufactured from virgin materials conserves non-renewable fossil fuels and reduces CO2 emissions to the atmosphere. Fossil fuel use is one of the biggest causes for greenhouse effect and global warming. In addition, reducing fossil fuel usage makes countries less dependent on imported oil.Plastic products take a lot of space in landfills when discarded. Plastic fills about 11 percent of our household waste and without
Waste plastic recycling supplier it increases the amount of solid waste going to landfills. In addition, plastic products do not decompose in landfills, so they take space in landfills for centuries and contribute to the need of new landfills. If you recycle one ton of plastic items, you can save 7.4 cubic yards of landfill space and slow down the need to plan and build new landfills.
source:
townhall|waste plastic recycling by: wenjun
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