News Time2016.06.08 News Sources Views
Along with the plastic, waste plastics has caused serious environmental pollution, and also contains the important renewable resources. Shortage of non-renewable, oil and coal resources, from the view point of the earth's resources saving and environment protect the earth, the countries attaches great importance to waste plastic recycling, invest a lot of manpower and material resources, and legislation, development of key technologies of various kinds of waste plastics recycling. Waste plastic recycling method mainly has fused regeneration, thermal cracking, energy recovery, recycling of chemical raw materials and other.
Because the plastic has corrosion resistance, not easy decomposition characteristics, especially the disposable plastic packaging waste, plastic mulch discarded the visual pollution caused by people, the so-called "white pollution", some land to use thin film for buried in the ground and become the soil pollution, buried plastic potential damage to the environment, the so-called potential pollution. Because in some animals can be its digestive plastic film and ultimately death, known as pollution directly.
Waste plastics recycling three applications
After waste plastic is recycled, mostly in the form of three back into the social production. The three application modes, respectively is: the reworked material, fuel and power generation.
Reworked material: the change of oil price fluctuation bring plastic prices, after artificial screening classification of waste plastics, after crushing, granulation, modified process, such as into a variety of transparent and opaque plastic particles, and then classified according to the appearance, eventually become a reworked material can be used again.
Fuel: initially, abroad to use waste plastics injection in the blast furnace instead of coal, oil and coke, cement instead of coal used for cement rotary kiln firing, and made waste solid fuel (RDF) is used for power generation, the effect is ideal. RDF technology originally developed by the United States. In recent years, the Japanese use of the characteristics of high calorific value, mixed waste plastics made from various combustible waste heat 20933 kj/kg and granularity of the RDF, can be used for the storage, transportation and other boilers, industrial furnace burning coal generation.
Blast furnace injection technology of waste plastics waste plastics as raw material is suitable for particle injection into blast furnace, instead of coke or coal, a new method of waste plastics processing. Blast furnace injection waste plastics abroad application shows that the utilization of waste plastics was 80%, and the amount of emissions for the burning of 0.1% 1.0%, produce less harmful gas, low processing costs.
Power: waste solid form fuels used in the United States, the earliest and RDF power station 37 points, accounting for 21.6% of the garbage power station. Japan has already realized the great potential of waste plastics power generation. Japan combined overhaul has a few small garbage incineration to RDF production station, in order to focus after continuous power efficient scale, of garbage power station steam parameter from 30012 to 45012, power generation efficiency is increased from 15% to 20% - 25%.
The analysis of the difficulties of waste plastics recycling
Countries is the world's largest waste plastics market in China, is the world's largest importer of waste plastic. But in the use of waste plastics recycling, our country is still in its infancy, waste plastics recycling utilization rate is very low, the development of the recycling industry is faced with many difficulties.
The first is the policy, waste plastics recycling can effectively reduce energy consumption and environmental pollution, but at present our country not to waste plastics recycling industry in the macro level of the development of comprehensive planning, the lack of specific policy support, lack of technical specification for classification of waste plastics and the lack of purchasing the plastic products with its security require companies to identify and encouragement. Related system is not sound, all of these lead to the waste plastics recycling industry in China for a long time in low levels.
2 it is technology, international, plastic recycling methods include physical regeneration and energy recovery, chemical reduction and used as a solid fuel, etc. But at present our country plastics recycling mainly based on physical regeneration. The vast majority of waste plastic recycling processing enterprises basic introduction, no conditions to develop new technologies, new processes, new equipment, product technology content and added value is low, which hindered the development of waste plastics recycling process.
Third, management, as we have learned, at present plastic industry by the environmental protection department, national development and reform commission, the ministry of commerce, general administration of customs, and general administration of quality supervision, inspection and other common management. Because industry focal points not clear, cause the lack of industry guidance and technical specifications. So should be established under centralized department as soon as possible, will be living garbage recycling work closely with the union, to set up a recycling system of the whole society.
Now, all countries around the world in all aspects of the measures for waste plastics recycling, part of the recycling of developed countries has received significant benefits. In the future development in our country, should also actively learn from the advanced experience, improve the utilization rate of waste plastics recycling, better promote the economic development of China
Waste plastic recycling development Suggestions
Plastic production increasingly developed, but human manufacture of plastic garbage is also more and more, waste plastic fill every corner of our life. In the current of pollution is more and more serious, as a result of plastic waste plastic recycling has become one of the main weapon to protect the environment, governance, plastic pollution.
Large-scale specialization not only so, waste plastics recycling industry, also has helped increase the additional value of plastic industry, reduce the consumption of chemical raw materials, save resources for chemical industry. Cut the cost of production at the same time, organized in a planned way the use of idle resources.
To strengthen the regulation and standard of the waste plastics recycling industry, to the health of the waste plastics industry sustainable development has important significance. At present, the recycling of waste plastics industry still exist many problems, but believe that after a long-term development, waste plastics recycling will make a great contribution for our country's plastic industry.
