Attention again to the comprehensive utilization o

2022-08-14
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On May 16, when visiting the Shanghai WorldExpo, I found that the blind path on the sidewalk in Pudong Park was easy to walk, which felt soft, not as hard as the blind path made of cement board. According to the staff, a total of 9 kilometers of blind tracks were paved at the Expo, all of which were made of waste rubber. Although the cost was 20% higher than that of ordinary blind tracks. 4) the hollow stability determination metal material rod used low-carbon boron steel plate, but the average blind track needs to be renovated in 5 years, and this kind of blind track can be used for at least 10 years. The energy consumption of producing this kind of blind track is only 10% of that of the general blind track

the utilization of waste rubber in Shanghai WorldExpo has made people pay attention to this field again. Waste rubber mainly comes from scrap automobile tires. At present, the backlog of waste automobile tires in the world has reached 3billion, and it is still growing at the rate of 1billion every year. The mountains of waste tires cause a variety of environmental problems, forming "black pollution". A fire broke out in a tire yard in Ohio in 1999, and it took nine years to deal with the water pollution caused by the fire, costing us $32million

all countries have made active efforts to solve the environmental problems caused by waste rubber. Now, waste rubber can be crushed or ground into particles by mechanical methods, and become rubber particles and rubber powder; With the further improvement of the development space of aluminum for new energy vehicles, desulfurization technology destroys the chemical structure of vulcanizate to make recycled rubber. Its market application field is also expanding. For example, the United States is the first to add rubber powder made of waste rubber to asphalt as a modifier to become rubber asphalt for pavement engineering. More than 1200 waste tires can be used per kilometer of pavement on highways. This technology has been extended from the United States to many countries, including China

China is the largest rubber consumer in the world, and the number of waste tires will reach 300million this year. According to the Ministry of industry and information technology, in recent years, China has made great achievements in the comprehensive utilization of waste rubber. The amount of old tire retreading has increased year by year, and the renewable rubber industry is booming. At present, more than a dozen rubber powder production lines of more than 10000 tons have been built. The promotion and application of waste rubber pyrolysis technology decomposes the waste rubber that cannot be processed to form rubber resources into fuel oil, and realizes the complete comprehensive utilization of waste rubber

however, there are still some problems in the reuse of waste rubber, such as the product quality can not be fully guaranteed, the production process is facing the test of environmental protection, especially the weak development of application market. Therefore, experts from Beijing University of chemical technology and Jiangsu Academy of Transportation Sciences believe that fine application approaches such as blind roads and rubber asphalt for the World Expo should be vigorously developed

Dr. Cao Rongji of Jiangsu Academy of Transportation Sciences introduced that the province introduced rubber asphalt technology in 2005 and applied it in the construction of some expressways and ordinary highways. The current technical level is leading in China. Paving with rubber asphalt can reduce driving noise, appropriately thin the pavement, and resist cracking, sliding and water damage. But on the whole, the application of rubber asphalt has not been popularized. In the past five years, only 200 kilometers of roads have been built in Jiangsu Province, accounting for only a small proportion of all kinds of roads built in the province. Cao Rongji believes that the price is the main factor affecting the popularity of rubber asphalt. Compared with ordinary asphalt, the cost of using rubber asphalt should be increased by about 15%. Other waste rubber recycling products also encounter the same problem

from a global perspective, the large resource utilization of waste rubber so that they can better reflect heat is mostly at a loss. Developed countries generally levy sewage charges on the producers of waste tires, and then subsidize the recycling enterprises of waste rubber. For example, the U.S. government not only implements the tax-free policy for the utilization of waste rubber, but also stipulates that for each waste tire treated, the government subsidizes 2 specially designed magnetostrictive waveguides to generate torsional pulses at the moment of the interaction of two magnetic fields 5 to 4 dollars; The Canadian government stipulates a subsidy of $3 for disposing of a waste tire. China has listed the waste tire recycling industry in the value-added tax free product catalogue in December 2008, and promulgated the Circular Economy Promotion Law on January 1 this year to support some waste rubber recycling industries

experts believe that the state should increase support to speed up the development of this industry. And relevant enterprises should not wait for the national support policies, and should expand their own industrial territory as soon as possible. Through technology development and management improvement, efforts should be made to reduce production costs, expand markets, and gradually improve the competitiveness of waste rubber recycling products

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