Use of Waste Tire Soil Refining, Heavy Oil Pollution and Recycling Should Pay Attention to Environmental Protection

At present, the use of waste tires for soil refining has existed in many parts of China. They used a simple earth kiln to incompletely burn used tires and fuse them into liquid fuels. During this process, they released large amounts of toxic and harmful gases such as hydrogen sulfide, sulfur dioxide, benzenes, and xylenes. The toxic and hazardous wastes also seriously polluted the land and water sources. In many areas, this kind of fuel is also added to the refined oil and sold, which also causes great damage to the car engine.
Soil-refining oil pollutes the environment and wastes resources, and it also destroys the healthy development of the recycling tire tire market in China. It is understood that, at present, the recycling methods of used tires in the world are mainly the renovation and reuse of plastic powders. In 2004, there were approximately 28 million tires retreaded in the United States, and the ratio of new tires to retreaded tires was 10:1, saving an annual oil consumption of 4 billion gallons. In 2004, the production of tires in China was 239 million, the production of used tires was over 112 million, the number of tires retreaded was only 8 million, and the ratio of new tires to retreaded tires was about 25:1. The United States and Canada began to study the use of rubber powder modified asphalt to lay roads as early as the 1970s. China has just begun to promote this technology. In 2004, the production of rubber powder was only an inevitable choice for the recycling of over 30,000 tons of used tires. With 4.2 million tons of rubber consumption, it has become the world's largest consumer of rubber consumption for the third consecutive year, of which 60% of rubber consumption needs to be imported, and the import volume is as high as 2.37 million tons, and the degree of foreign dependence continues to expand. Nearly 70% of the total rubber consumption is used to produce tires. In 2004, China’s tire production was 239 million. At the same time, the production of used tires has grown dramatically and has exceeded 112 million. It is estimated that by 2010, the production of used tires in China will reach more than 200 million.
At present, China's waste tire recycling and utilization are very low. Among them, the production of reclaimed rubber is the main method for recycling used tires in China. The annual output exceeds 1 million tons and is the world's largest producer of recycled rubber. However, due to desulfurization during the production of reclaimed rubber, which causes secondary pollution to the environment, most western developed countries have abandoned this method. In addition, waste tires are also used in the production of low-tech crude products such as agricultural shoe soles, construction ash buckets, and pig troughs, as well as illegal soil refining. The proportion of retreads used for recycling and production of rubber powder is low, and the overall utilization rate is only about 45%. In stark contrast to this, the tire retreading industry has developed rapidly internationally. The carcass of a tire is equivalent to 70% of the value of a new tire. After several times of refurbishment, it can replace new tires. In the United States, the transportation industry saves more than $2 billion a year by refurbishing the same tire two or three times. In order to ensure that tires can be reused, countries have regulations that regulate the quality of new tires produced by manufacturers. Taking Michelin as an example, when its tires are sold in Europe and North America, it must be guaranteed at least 3-4 times of refurbishment with a service life of 7 years and a mileage of at least 1.6 million kilometers.
From black pollution to considerable business opportunities An important reason for the rapid development of reclaimed rubber in China and the slow development of rubber powder industry is that biased tyres still have a considerable market in China, and reclaimed rubber is used as the main raw material. The international tire development trend is that from slanted tires to internal radial tires, to no radial radial tires, and now to the development of low flat no radial radial tires, China's status is 10-20 years slower than the international market. At present, China's card and passenger car tires have a meridianization rate of only 23%, 100% in Western Europe and 98% in North America. The radial tire has a long service life, which is conducive to retrofitting and reuse. The production of rubber powder is also not likely to cause environmental pollution.
The space for the development of China's used tire industry has been spotted, and foreign manufacturers have come. On September 21, Michelin announced the launch of a Chinese tire renewal plan. According to reports, Michelin will extend the life of tires by regrooving 25%. After a ditching and refurbishment, the service life of a tire is 90% of the new tire, and the cost of engraving a tire is equivalent to 5% of the price of a new tire. Tire production consumes a lot of oil, producing 84 liters of oil for a new truck tire, 28 liters of oil for a refurbished truck tire, and the new tire produces 68% more oil than retreaded tires. In addition, Michelin will also focus on promoting radial tires in China by replacing radial tires with radial tires to reduce fuel consumption, improve vehicle safety, and reduce pollution caused by discarded tires.
The construction of the legal system hinders the use of used tires It is reported that the lack of births is the main reason for the low rate of tire retreading in China. At present, China has not yet established a sound tire recycling system, there is no formal management regulations, there is no specific waste tires collected back to the scattered, disorderly recycling network is difficult to form a reasonable recycling of waste tires.
The developed countries attach great importance to the development and utilization of used tire resources. Governments in various countries have adopted legislation and established specialized agencies to manage and implement incentive policies. For example, the United States has successively issued the “Tire Recycling and Utilization Act” and the “Special Act on the Recycling of Waste Tires”. Each state has set up a special fund to manage, remove, and dispose of used tires. In 1975, France enacted the Waste and Resource Recovery Act. In 1992, Canada awarded the “Tire Recycling Management Association” special legislative appointment to manage the special fund for waste tyre processing fees. In 1993, the "Environmental Burden and Fiscal Measures" in Section VIII of the "Environmental Basic Law," promulgated by Japan, stipulated the user's payment obligations. At present, users discard a waste tire and pay a processing fee of 300 yen.

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