As a supplement to limited rubber resources and the use of rubber waste, the history of waste rubber comprehensive utilization industry has a long history. Especially after the founding of New China, in the era of planned economy with scarce resources, China once had a history of using 20 tons of rice in exchange for 1 ton of imported natural rubber. At that time, reclaimed rubber was also highly valued as the three types of strategic materials.
The comprehensive utilization of waste rubber in China is mainly the production of reclaimed rubber and rubber powder. Supporting the development of this industry is China's independent innovation technology with independent intellectual property rights: dynamic desulfurization method reclaimed rubber production technology and waste tires at room temperature grinding technology. At present, both technologies are among the world's leading companies. Technological innovation and independent development have become the mainstream of industry development.
Dynamic desulfurization—a revolution in the production process of reclaimed rubber
Before 1990, domestic reclaimed rubber production basically remained at the technical level of the oil method, water and oil method, and the production process and equipment remained unchanged for decades. Among them, the oil method has gradually been eliminated due to low product quality and unstable production; while the water-oil process is superior to the oil method, a large amount of industrial waste water is produced during the production and seriously pollutes the environment. With the increase of environmental protection requirements and the increase in the proportion of synthetic rubber used in waste rubber, the serious drawbacks of the production of reclaimed rubber from water and oil, such as serious pollution, high energy consumption, and low production efficiency, have become bottlenecks that hinder the development of comprehensive utilization of waste rubber. The stipulations banned the construction of new factories.
At the crucial moment in the development of the reclaimed rubber industry, in 1990, the former Department of Rubber of the Ministry of Chemical Industry and the China Rubber Industry Association examined the reclaimed rubber process in foreign countries, combined with the current domestic production status, and decisively decided to carry out dynamic desulfurization of waste rubber in the industry. The research and development of the process technology was jointly undertaken by Hefei Universal Rubber General Plant, Shenyang Reclaimed Rubber Plant and Tianjin Reclaimed Rubber Plant. In 1991, the project was included in the scientific and technological research project of the Ministry of Chemical Industry; in 1992, the project was listed in the National Science and Technology Commission Spark Program. After more than three years of research, the new process technology for waste rubber dynamic desulfurization was successfully developed. In 1994, it passed the original scientific identification of the Ministry of Chemical Industry. The new dynamic technology of waste rubber dynamic desulfurization completely changed the backward and seriously polluted reclaimed rubber production process in China, and promoted the redevelopment of the waste rubber comprehensive utilization industry. At the same time, this technology has also gone abroad.
According to the test, the reclaimed rubber produced by the new dynamic technology of waste rubber dynamic desulfurization has stable product performance, reliable quality, and all physical and chemical indicators have reached the national standards. Compared with the water-oil method, the process is simplified and investment is reduced. At that time, it was estimated that the total output of reclaimed rubber in the country was about 300,000 tons. If 2/3 of the technology is used, it can save 95.16 million kwh per year, saving 5.52 million tons of water, saving 81,800 tons of coal, and directly saving costs 4793. 4 million. At present, China's reclaimed rubber production has basically adopted dynamic desulfurization technology.
Normal temperature crushing - waste steel wire processing to achieve industrialization
In recent years, a number of domestic companies have made breakthroughs in scrap rubber smashing, especially in waste steel wire at room temperature, which has greatly promoted the development of reclaimed rubber and rubber powder industry. Among them, Zhejiang Luhuan Rubber Powder Engineering Co., Ltd. independently handles 15,000 tons of all-steel waste radial tire crushing production lines annually, adopting 3 patented technologies, stable technology, low noise, and no pollution. The low-power energy-saving crusher series products developed by Changzhou Sanyake Machinery Co., Ltd. provide new energy-efficient equipment for the comprehensive utilization of waste rubber. Jiangyin Tailian Ultrafine Powder Factory is the first enterprise engaged in the research and development of room temperature fine powder equipment. In 1996, it passed the appraisal of Jiangsu Province, and its XZ-300 ultra-fine rubber crusher at room temperature filled the gap in the country. Sichuan Shuangliu Tianli Min Rubber Co., Ltd. One-time normal-temperature fine crusher, 80-mesh rubber powder output of more than 300 kilograms per stand, power consumption is only 400 kwh, is a waste tire, waste butyl capsules, waste three Fine ethylene propylene rubber and other finely-smashed energy-saving models.
Environmental Protection --- Improve the overall image of the industry
In the production of reclaimed rubber, due to the odor of hydrogen sulfide in the desulfurization process and the emission of exhaust gas in the production is not up to the standard, secondary pollution is caused, which seriously affects its image as an environmental protection industry. The physical reclaimed rubber tail gas treatment device developed by Jiangxi Guoyan Rubber Co., Ltd. in 2002 completely changed the odor and desulfurization tail gas treatment problems that have plagued the industry for many years. The odor level after treatment is 10,000 times lower than the national standard, and there is no emission of benzene-based gas. Recycling and use of exhaust gas as fuel will again save energy and reduce production costs. The tower type recirculation process exhaust gas purification system developed by Sanming Huanke Chemical Rubber Co., Ltd. enables the tarless production of reclaimed rubber containing mineral tar. In addition, Kunming Phoenix Rubber Co., Ltd. and Kunming University of Science and Technology developed a biological exhaust gas purification device.
At present, reclaimed rubber enterprises with an annual output of more than 5,000 tons in the industry basically adopt physical methods, biological methods, and self-renovation methods for the desulfurization exhaust gas, and secondary pollution has basically been effectively controlled.
The comprehensive utilization of waste rubber in China is mainly the production of reclaimed rubber and rubber powder. Supporting the development of this industry is China's independent innovation technology with independent intellectual property rights: dynamic desulfurization method reclaimed rubber production technology and waste tires at room temperature grinding technology. At present, both technologies are among the world's leading companies. Technological innovation and independent development have become the mainstream of industry development.
Dynamic desulfurization—a revolution in the production process of reclaimed rubber
Before 1990, domestic reclaimed rubber production basically remained at the technical level of the oil method, water and oil method, and the production process and equipment remained unchanged for decades. Among them, the oil method has gradually been eliminated due to low product quality and unstable production; while the water-oil process is superior to the oil method, a large amount of industrial waste water is produced during the production and seriously pollutes the environment. With the increase of environmental protection requirements and the increase in the proportion of synthetic rubber used in waste rubber, the serious drawbacks of the production of reclaimed rubber from water and oil, such as serious pollution, high energy consumption, and low production efficiency, have become bottlenecks that hinder the development of comprehensive utilization of waste rubber. The stipulations banned the construction of new factories.
At the crucial moment in the development of the reclaimed rubber industry, in 1990, the former Department of Rubber of the Ministry of Chemical Industry and the China Rubber Industry Association examined the reclaimed rubber process in foreign countries, combined with the current domestic production status, and decisively decided to carry out dynamic desulfurization of waste rubber in the industry. The research and development of the process technology was jointly undertaken by Hefei Universal Rubber General Plant, Shenyang Reclaimed Rubber Plant and Tianjin Reclaimed Rubber Plant. In 1991, the project was included in the scientific and technological research project of the Ministry of Chemical Industry; in 1992, the project was listed in the National Science and Technology Commission Spark Program. After more than three years of research, the new process technology for waste rubber dynamic desulfurization was successfully developed. In 1994, it passed the original scientific identification of the Ministry of Chemical Industry. The new dynamic technology of waste rubber dynamic desulfurization completely changed the backward and seriously polluted reclaimed rubber production process in China, and promoted the redevelopment of the waste rubber comprehensive utilization industry. At the same time, this technology has also gone abroad.
According to the test, the reclaimed rubber produced by the new dynamic technology of waste rubber dynamic desulfurization has stable product performance, reliable quality, and all physical and chemical indicators have reached the national standards. Compared with the water-oil method, the process is simplified and investment is reduced. At that time, it was estimated that the total output of reclaimed rubber in the country was about 300,000 tons. If 2/3 of the technology is used, it can save 95.16 million kwh per year, saving 5.52 million tons of water, saving 81,800 tons of coal, and directly saving costs 4793. 4 million. At present, China's reclaimed rubber production has basically adopted dynamic desulfurization technology.
Normal temperature crushing - waste steel wire processing to achieve industrialization
In recent years, a number of domestic companies have made breakthroughs in scrap rubber smashing, especially in waste steel wire at room temperature, which has greatly promoted the development of reclaimed rubber and rubber powder industry. Among them, Zhejiang Luhuan Rubber Powder Engineering Co., Ltd. independently handles 15,000 tons of all-steel waste radial tire crushing production lines annually, adopting 3 patented technologies, stable technology, low noise, and no pollution. The low-power energy-saving crusher series products developed by Changzhou Sanyake Machinery Co., Ltd. provide new energy-efficient equipment for the comprehensive utilization of waste rubber. Jiangyin Tailian Ultrafine Powder Factory is the first enterprise engaged in the research and development of room temperature fine powder equipment. In 1996, it passed the appraisal of Jiangsu Province, and its XZ-300 ultra-fine rubber crusher at room temperature filled the gap in the country. Sichuan Shuangliu Tianli Min Rubber Co., Ltd. One-time normal-temperature fine crusher, 80-mesh rubber powder output of more than 300 kilograms per stand, power consumption is only 400 kwh, is a waste tire, waste butyl capsules, waste three Fine ethylene propylene rubber and other finely-smashed energy-saving models.
Environmental Protection --- Improve the overall image of the industry
In the production of reclaimed rubber, due to the odor of hydrogen sulfide in the desulfurization process and the emission of exhaust gas in the production is not up to the standard, secondary pollution is caused, which seriously affects its image as an environmental protection industry. The physical reclaimed rubber tail gas treatment device developed by Jiangxi Guoyan Rubber Co., Ltd. in 2002 completely changed the odor and desulfurization tail gas treatment problems that have plagued the industry for many years. The odor level after treatment is 10,000 times lower than the national standard, and there is no emission of benzene-based gas. Recycling and use of exhaust gas as fuel will again save energy and reduce production costs. The tower type recirculation process exhaust gas purification system developed by Sanming Huanke Chemical Rubber Co., Ltd. enables the tarless production of reclaimed rubber containing mineral tar. In addition, Kunming Phoenix Rubber Co., Ltd. and Kunming University of Science and Technology developed a biological exhaust gas purification device.
At present, reclaimed rubber enterprises with an annual output of more than 5,000 tons in the industry basically adopt physical methods, biological methods, and self-renovation methods for the desulfurization exhaust gas, and secondary pollution has basically been effectively controlled.
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