The main characteristics of industry development in the past five years

(1) The scale expansion of the industry is more obvious. According to incomplete statistics, there are nearly 1,000 domestic tire retreading enterprises, with an annual production capacity of about 20 million. There are more than 50 tire retreading companies with an annual output of more than 50,000, and more than 15 companies with an annual output of more than 100,000. The annual output of production companies has reached more than 300,000; reclaimed rubber and its supporting production enterprises have also reached 1,000 Yujia has an annual production capacity of 3.5 million tons. Recycled rubber production enterprises have reached more than 100 companies with an annual output of more than 10,000 tons, more than 10 production companies with more than 50,000 tons, and production companies have reached 100,000 tons; there are more than 200 rubber powder production companies with an annual production capacity of 1 million tons ; There are two ways for thermal cracking of waste tires in China. One is standardized scientific cracking. Due to the large investment, the carbon black produced is of poor quality, difficult to sell, and is slow to develop. Its application rate is less than 10%, and the annual output is about 50,000 tons. The other is that the local method of oil refining accounts for more than 90%, which causes serious environmental pollution. Due to the small investment, fast recovery, and large profits, although the state explicitly prohibits it, it has been repeatedly prohibited. In 2009, 13 million tires were retreaded, recycled rubber output reached 2.45 million tons, and rubber powder output was less than 100,000 tons.

       (2) The industrial layout shows a trend of cluster development and the status of private investment. Some large domestic tire retreading enterprises are mainly distributed in Guangdong, Shandong, Sichuan, Fujian, Jiangsu and other places. A diversified development pattern of coexistence of state-owned, private and foreign capital has formed, and private capital has become a force; Tangshan in Hebei, Nantong in Jiangsu, Pingyao in Shanxi, Wenzhou in Zhejiang, Jiaozuo in Henan, Maoming in Guangdong, Ya'an in Sichuan and other regions are the production bases for recycled rubber. Form a one-stop industrial chain of waste tire recycling, dismantling, regeneration, and deep processing.

       (3) Breakthroughs in key technologies. There are mainly the following aspects:

       1. The key equipment for tire retreading, rubber powder and reclaimed rubber production has basically been imported from the original to the present and basically achieved localization, and most of the products have been solved or reached the international level.

       2. The form of tire retreading has been changed from hot-rolled bias tires to pre-vulcanized radial tires.

       3. The use of some inspection equipment today makes the retreaded tire inspection more scientific and reliable, thus ensuring the quality of the product.

       4. The additives for reclaimed rubber have changed from high pollutants to new alternative production capacity with less pollution and emissions, which has been greatly improved in terms of exhaust gas treatment and energy consumption reduction.

       5. Rubber powder desulfurization technology realizes dynamic, low temperature, normal pressure, continuous, and net emissions.

       6. The application of low-temperature micro-negative pressure catalytic cracking technology turns black pollution into green energy, achieving the goals of continuous, low temperature, energy saving, emission reduction and environmental protection.