Global solution to the black pollution problem of

2022-08-26
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Global solution to the problem of "black pollution" of waste tires

waste tires are known as "black pollution" in the industry, and their recycling and treatment technology has always been a worldwide problem. Recently, the economic information daily found that under environmental pressure, countries have attached great importance to the recycling and disposal of waste tires when conducting research in the United States, Germany, Japan and other major auto production and marketing countries in the world. For example, Germany has established a strict recycling system, which prohibits random disposal, and even legislates to prohibit the disposal of waste tires by landfilling; Every state in the United States has introduced special laws or regulations for the disposal of waste tires; Japan began to use a variety of technologies and ways to deal with waste tires, of which thermal decomposition is considered to be the most valuable emerging technology in the future. In China, waste tire treatment has become a strategic industry to solve "black pollution" and promote resource recycling. The exploration of some leading enterprises represented by Shuangxing group also shows the industry the future development direction

China: leveraging the recycling economy of waste tires with "black technology"

the increasing waste tires have caused serious pressure on the global ecological environment. Recently, double star group, together with 9 domestic universities, announced that it had overcome this worldwide problem, turning the original "black pollution" into "black gold", providing a "Chinese model" for the disposal of waste tires worldwide

"black pollution" problem solving

in April, the double star ixda waste rubber green cracking intelligent factory located in Runan County, Henan Province, was as "hot" as this weather: trucks loaded with waste tires entered the plant area, and the unloaded waste tires were then transported to the loading area by AGV trolleys (transporters that can automatically travel along the specified guidance path). After intelligent cutting and cleaning, Then it is transported to the intelligent cracking equipment, and the reaction generates cracking oil, carbon black, steel wire and gas

waste tires are harmful solid wastes, which are called "black pollution" by the industry. Improper disposal will seriously affect human health and endanger the safety of the ecological environment

data show that in 2017, the production of waste tires in China has exceeded 13million tons, with an annual growth rate of 6% to 8%. It is expected that the production of waste tires will exceed 20million tons by 2020

the surge in the number of waste tires has put forward new requirements for ecological environmental protection, but the current situation of waste tire treatment in China is worrying

it is reported that most of the waste truck and bus tires with all steel tires and natural rubber in the industry are treated by refurbishing and producing recycled rubber or rubber powder; On the other hand, a large number of semi steel tires and synthetic rubber used passenger car tires have flowed into the "indigenous refining" workshop, causing irreparable damage to the ecological environment

in order to solve this problem, the Ministry of science and technology will list the "efficient pyrolysis of waste passenger car tires and comprehensive utilization of by-products" as the key special project of "solid waste recycling" in 2018. In July of the same year, double star group jointly won the bid for this project with 9 universities, including Southeast University, Beijing University of technology, China University of petroleum, Qingdao University of science and technology

in March this year, at the "press conference of major special achievements of solid waste recycling of the Ministry of science and technology", the research group announced that it had overcome 17 key technologies and regularly applied a thin layer of molybdenum disulfide grease; Technical problems, developed waste tire pyrolysis and carbon black regeneration technology and intelligent equipment to fill the global gap, and successfully built the world's first green ecological recycling intelligent factory of waste tires in Runan, realizing "zero pollution, zero residue, zero emission and full utilization" of waste tires

waste tires turned into "black gold"

at the "conference of major special achievements of solid waste recycling of the Ministry of science and technology", Shuangxing group's smart plant scheme for green ecological recycling of waste rubber won the "praise" of the experts attending the meeting

Chen Biaohua, a professor at Beijing University of technology, believes that Shuangxing is not the first enterprise engaged in the thermal cracking of waste tires, but the technology is innovative and has achieved 100% utilization of waste tires. He hopes that this set of technology can go abroad like China's high-speed rail

Xiao Rui, Dean of the school of energy and environment of Southeast University, said that pyrolysis technology is the most effective and promising way to treat waste tires at present. The landing of Shuangxing smart factory for green ecological recycling of waste rubber will contribute to the industrialization promotion and replication of future projects

in fact, with the increase of national environmental protection policies, the waste tire treatment market arrived ahead of schedule, and the past "black pollution" is turning into "black gold"

in December last year, the "pilot work plan for the construction of a" waste free city "issued by the general office of the State Council clearly pointed out that the classified collection and harmless treatment facilities of solid wastes such as waste tires should be included in the construction of urban infrastructure and public facilities

policy support and strong demand have brought unprecedented large markets and development opportunities for the green ecological recycling of waste tires

liushuangxi, an expert of cracking branch of China Tire Recycling Association and professor of Nankai University, said that based on the annual disposal of 100000 tons of waste tires in Shuangxing Runan factory, 45000 tons of cracking oil, 8000 tons of gas, 35000 tons of carbon black and 12000 tons of steel wire can be obtained. The annual sales of these products are expected to reach 360million yuan. If 13million tons of waste tires produced every year are treated in this way, an industrial chain with an annual output value of more than 100billion yuan can be formed

create a model of sustainable circular economy

at present, Shuangxing, a project with a number of independent intellectual property rights, has attracted international attention. According to Chai Yongsen, chairman of Shuangxing group, enterprises from the United States, Japan and other countries have been negotiating with Shuangxing and hope that the project can be settled in a foreign country

the industry believes that the disposal of waste tires has always been a global problem, and the release of the green ecological recycling scheme of double star waste rubber and the production of the first intelligent chemical plant undoubtedly provide a "Chinese model" for the disposal of waste tires worldwide

Chai Yongsen said that waste tire treatment is a strategic industry to solve "black pollution" and promote resource recycling. Shuangxing hopes to become a model of sustainable circular economy through its own efforts

in fact, China is in a critical stage of rapid economic development and resource and environmental bottlenecks, and changing the mode of economic growth and developing a sustainable circular economy is the only way to establish a resource-saving and environment-friendly society

however, in the environment of immature industrial chain, the rapid development of the industry has also caused market chaos. Take the treatment of waste tires as an example. For a long time before, the whole industry was in a state of disorder, especially the harm of "indigenous refining", which not only caused safety hazards and secondary pollution, but also the low quality of products produced by the treatment of refined pyrolysis oil, pyrolysis carbon black and so on. At the same time, people also misunderstood the treatment of waste tires

therefore, Chai Yongsen believes that standardizing and improving the recycling system is the key prerequisite for the development of waste tire recycling economy. The whole process supervision and traceability management should be implemented to ensure the standardized recycling, circulation and disposal of waste tires. At the same time, the standards of recycled products based on technical specifications should be improved to promote the sustainable development of waste tire recycling economy

Japan: the reuse rate of waste tires is high, and there are many tricks

□ leshaoyan Tokyo report

how to do a good job in the recycling of the increasing number of waste tires is related to important issues such as environmental protection and resource and energy conservation, which is highly valued by all parties in Japan

nearly 100 million waste tires are produced every year

Japan is the first country in Asia to realize the entry of cars into ordinary families. According to the statistical data released by the Japan Automobile Inspection and registration information association, as of the end of December 2018, the number of cars owned in Japan was more than 82.19 million, with an average of 6 cars for every 10 people and about 2.5 cars for each family

with the increase of car ownership, more and more waste tires are produced. According to the statistical data published by the Japan automobile tire Association, as of 2017, Japan had produced a total of 97million waste tires, an increase of 3million over the previous year, and the weight increased by 37000 tons over the previous year

tires are important components to ensure safe driving of vehicles. Their patterns can increase the friction between tires and the ground, reduce tire noise, enhance comfort, heat dissipation and drainage for tires, and improve vehicle handling performance. To this end, the relevant parties in Japan have formulated the use standards of automobile tires in accordance with Article 9 of the road transport vehicle security benchmark law. For example, for cars running on general roads, the tread groove ridge of tires should not be less than 1.6mm; If the tread groove depth of a snow tire is less than 50% of that of a new tire, it cannot be used as a snow tire, etc

in addition, the Japan automobile tire association also suggested to consumers that even if the vehicle utilization rate is very low and the tire pattern is hardly worn, they should also replace the new tire as long as the delivery time is more than 10 years. Because rubber products will continue to age naturally even if they are not used, which may affect safe driving

convenient and stable recycling channels have been established

at present, Japan mainly recycles waste tires through resource recycling enterprises, gas stations, automobile maintenance and repair plants, scrap vehicle recycling companies and other channels

in Japan, waste tires cannot be thrown at garbage collection points as garbage. Car owners must contact resource recovery companies to collect waste tires, and resource recovery companies usually need to pay recycling fees when collecting them on-site

in addition to a few self-service gas stations, most of the attended gas stations in Japan also have sidelines such as selling and changing car tires, engine oil and transmission oil for car owners without man hour fee

because scrapped cars in Japan require a fee, in order to reduce trouble and expenditure, most consumers will hand over their old cars to the sales company after buying a new car. Therefore, automobile sales and maintenance companies are important channels for recycling waste tires. Japanese automobile manufacturers basically have special automobile sales companies with their own maintenance departments. After the car is sold, the after-sales service personnel will carry out tracking service, and the replaced tires will be handled by the repair company without paying the recovery fee

multiple utilization technologies and methods are developed at the same time

with the increasing awareness of energy conservation and environmental protection, the recycling rate of waste tires in Japan has been continuously improved in recent years

the recycling forms of waste tires in Japan mainly include: retreading tires, producing reclaimed rubber, rubber powder, heat energy utilization, thermal decomposition and oil refining, as well as being used as paving materials

because the retreading and recycling of tires is a very ideal treatment method, Japan's Bridgestone, Yokohama tires, Sumitomo rubber, Toyo tires and other major tire companies are actively engaged in the recycling of waste tires, with subsidiaries specializing in tire retreading business

at present, there are 21 renewable tire enterprises in Japan, and 40 factories are also engaged in tire retreading business from the perspective of tensile strength and elongation at break. These tire retreading enterprises first select the tires suitable for retreading through the automatic quality identification system, and then send them to the retreading workshop for retreading after passing the test. From the appearance, the retreaded tire is exactly the same as the new tire. However, manufacturers will mark retreaded tires in obvious places

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